1. Main Equipment Options for 800 Mesh Powder Production

1.1 Ultrafine Ring Roller Mill (Top Recommendation for Non-Metallic Ores)

This is the most cost-effective and widely used solution for large-scale 800 mesh non-metallic ore powder manufacturing, covering the 325–2500 mesh fineness range.

• Core principle: Adopts multi-layer roller-ring grinding structure paired with a built-in high-precision variable-frequency turbo classifier. Fineness is steplessly adjusted by controlling the classifier rotation speed.
• Advantages:
  • Delivers stable 800 mesh product with D95~D97 sieve passing rate
  • 30~40% lower energy consumption than ball mill production lines with the same output
  • Compact layout, small footprint, fully enclosed negative pressure operation with zero dust emission
  • Compatible with most non-metallic ores (Mohs hardness ≤7, moisture ≤6%): limestone, calcite, talc, barite, kaolin, dolomite, etc.
• Limitations: Not recommended for ultra-hard materials (Mohs >7) or applications with ultra-high purity requirements.

1.2 Ball Mill + High-Precision Air Classifier

The traditional solution for grinding hard and abrasive materials.

• Advantages: Suitable for Mohs hardness 5~9 materials, high grinding ratio, robust structure and low wear cost for hard ores.
• Limitations: High energy consumption, large floor space requirement, high steel consumption, and wider particle size distribution compared to ring roller mills.

1.3 Vertical Roller Mill (Medium-Fine to Ultra-Fine)

Suitable for integrated drying and grinding of materials with higher moisture.

• Advantages: Combines drying, grinding and classification in one unit, handles feed moisture up to 15%.
• Limitations: Lower grading precision for 800 mesh, higher investment than ring roller mills for pure ultra-fine production.

1.4 Jet Mill (Air Flow Mill)

For small-batch, high-purity 800 mesh powder production.

• Advantages: Achieves extremely narrow particle size distribution, minimal product contamination, and high purity.
• Limitations: Very high capital and operating costs, low single-machine capacity. Only feasible for high-value materials (pharmaceutical, food, electronic-grade, advanced ceramics).

2. Key Selection Criteria

2.1 Raw Material Properties

• Mohs hardness:
  • ≤7 → Prioritize ultrafine ring roller mill
  • 7~9 → Choose ball mill + air classifier line
  • High-purity soft materials → Jet mill
• Moisture content: Must be controlled below 6% for ring roller mills. For moisture 8–15%, choose vertical roller mill with drying function.
• Abrasiveness: Highly abrasive ores prefer ball mill systems for longer service life of wear parts.

2.2 Required Production Capacity

2.3 Fineness & Passing Rate Standard

Always confirm the required passing rate standard for 800 mesh:

• D90: Basic industrial grade
• D95: Industry standard for mineral fillers (most common)
• D97: High-end grade for premium coatings and plastics Higher passing rate requirements reduce actual output and increase energy consumption per ton.

2.4 Complete System Configuration

• Classifier: Must be equipped with a high-precision variable-frequency turbo classifier to guarantee stable 800 mesh grading accuracy.
• Collection system: Cyclone collector + pulse bag dust collector (total collection efficiency ≥99.5%).
• Air circuit: Closed negative pressure circulation system to prevent dust pollution and product loss.

3. Final Selection Recommendations

• For mass production of 800 mesh non-metallic ore powder (limestone, calcite, talc, barite): Ultrafine ring roller mill is the best choice, offering the optimal balance of investment cost, production efficiency, energy consumption and product quality.
• For 800 mesh production from hard ores (quartz, feldspar, corundum): Choose ball mill + high-efficiency air classifier combination.
• For high-moisture raw materials: Vertical roller mill with integrated drying function is more suitable.
• For small-batch, high-purity 800 mesh powder (food, pharmaceutical, electronic grade): Jet mill is the appropriate solution.

Choosing a Raymond mill means the equipment will operate at full load and at its absolute performance limit, while opting for a ring roller ultrafine mill will lead to unnecessary investment waste and underutilization of equipment capacity.

So, how should you properly select processing equipment for 325-mesh mineral powder? This is a big question.

As an engineer with 20 years of experience in the R&D and manufacturing of mineral grinding equipment, I find this question quite straightforward to address. Before diving into the answer, we first need to clarify three points: What are the upstream and downstream industries of mineral powder? What core demands do these industries have for mineral powder? And why is 325 mesh such a widely specified fineness grade?

325 mesh (approx. 45μm) is the most cost-effective general-purpose fineness grade in industrial mineral powder processing. It covers massive market demand and represents one of the highest-volume product specifications in the non-metallic powder industry. Key applications are as follows:

1. Building & Construction: 325-mesh limestone, marble and calcite powder serve as core functional fillers for putty, dry mortar, tile adhesive and joint sealant, improving workability, water retention and adhesion. They also act as inert concrete admixtures to reduce cement consumption and hydration heat, and are basic raw materials for artificial stone and permeable bricks.
2. Plastics & Rubber Industry: 325-mesh ground calcium carbonate (GCC), talc and dolomite powder are the standard specification for general-purpose fillers. Widely used in PVC pipes, PE/PP profiles, cables and rubber products, they cut raw material costs while improving dimensional stability, rigidity, heat resistance and surface finish. This fineness accounts for the largest shipment volume in the filler sector.
3. Paints & Coatings: Used as extender pigments in interior latex paints, industrial primers and anti-corrosion coatings, 325-mesh mineral powder reduces consumption of expensive pigments like titanium dioxide, and enhances hiding power, abrasion resistance and anti-settling performance of paint films.
4. Flue Gas Desulfurization (FGD): 325-mesh limestone powder is the standard reagent for limestone-gypsum FGD systems in coal-fired power plants and steel mills. It features moderate reaction activity and low grinding cost, delivering desulfurization efficiency over 90%, and represents one of the largest industrial applications for this fineness grade.
5. Oil & Gas Drilling: 325-mesh barite powder acts as the primary weighting agent in drilling fluids, balancing downhole formation pressure and preventing blowouts during oil and gas exploration.
6. Papermaking & Light Chemical Industry: Calcite and talc powder are used as paper fillers and coating pigments to improve brightness, opacity, and smoothness while saving wood pulp. Quartz, kaolin, and fluorite powder also serve ceramic, metallurgical flux, and sodium silicate production.

The 325-mesh mineral powder has a wide range of applications and is used in large quantities. That’s why many mineral powder factories produce 325-mesh mineral powder.

From the above picture, we can see that both the Raymond mill and the ultra-fine grinding machine can handle the production of 325-mesh stone powder. So, how should we make the choice?

This will depend on the needs of our future production activities. If we only produce the highest 325-mesh mineral powder in the future and the demand continues to be high, then there is absolutely no need for us to invest in building a production line for ultra-fine grinding machines. If in the future we decide to increase the fineness of the product, for instance, if there is a market demand for 1000-mesh or 1250-mesh mineral powder in the future, then we will definitely have to choose an ultra-fine grinding machine.

1. The fineness range that the Raymond mill can process is from 40 to 400 microns, which is sufficient to meet the requirements of most mineral powder fineness.
2. The production technology of the Raymond mill is highly mature, with numerous manufacturers and stable products.
3. Compared with ultra-fine grinding machines, the investment cost of the Raymond mill is lower and it is easier to recover the investment.

1. Ultra-fine grinding offers finer processing, and the fineness can be adjusted from 325 mesh to 3000 mesh.
2. For customers who aim to improve the fineness of their finished stone powder in the future, an ultra-fine grinding machine is indispensable.
3. The ultra-fine grinding machine is more intelligent and the PLC control is more convenient.

Based on the above description, I believe you have now understood how to choose between a Raymond mill and an ultra-fine grinding machine.

True triaxial Cubic Hydraulic Press-Polycrystalline diamond composite (PDC) is an ultra-hard composite material produced using a six-sided press under high temperature and high pressure conditions. It combines artificial diamond powder, binder, and hard alloy matrix in one firing process. This material combines the high wear resistance of diamonds with the high impact resistance of hard alloys. Drills made from PDC not only significantly extend the life of the drill bit but also markedly improve drilling efficiency. Currently, it is widely used in coalfields, geology, oil, and natural gas fields. For the application of HPHT CUBIC PRESS machines in PDC cutter production.

PDC cutters are produced under high temperature and high pressure. This cubic press machine is applicable to the manufacture of PDC cutters, synthetic gemstones, synthetic diamonds and other superhard materials, providing the high-pressure and high-temperature environment required in the production process.

The first set of true triaxial Cubic Hydraulic Press utilizes high-precision displacement and hydraulic pressure control to load from six directions of the (x/y/z) three axes. Through the control system, it can achieve individual control of the six cylinders for synchronous and asynchronous loading. It can realize confining pressure, eccentric pressure, and eccentric stress loading on the sample. Pressure control accuracy: ±0.05MPa; Controllable range of pressurization and depressurization rates: 0-10MPa/min; The automatic pressure relief control speed is 0.05 to 0.5MPa/s. The fast return speed is approximately 3mm/s. The system is equipped with slow-pressure-increase and slow-pressure-decrease control functions. The pressure regulation accuracy for pressure increase and decrease is 0.01MPa. The slow pressure rise rate is ≤0.002MPa/s; The slow pressure drop rate is ≤0.003MPa/s; The pressure fluctuation during the pressure-holding process is 0.02MPa.

Our Equipment Advantages

• Finite element simulation computer unit force analysis +
  intelligent verification design;
• It adopts a segmented forging process (with
  higher strength) combined with a deposition process;
• Leading the application scenario of large
  cavity press into a new track;
• Long service life, low cost, high output, and better
  benefit-output ratio;
• The overall specific heat treatment process of the hinge beam
  makes its comprehensive mechanical properties more excellent;
• The working cylinder and the hinge beam are integrated into
  one, making the main structure more compact and quieter
  during use;
• The fatigue strength, yield strength, and tensile strength of the
  hinge beam of the new forging press is better, and the high-pressure
  deformation is smaller and more uniform, making the
  press more stable when working in high-temperature and high-pressure environments
  environments
• The design pressure of the host is 110 megapascals. Provide
  quality assurance under pressure conditions of 90 megapascals
  and below, with a warranty period of 5 years. This parameter
  can basically meet the working conditions requirements of
  production processes such as industrial diamond, cultivated
  diamond, and superhard material tool pressing (except for
  special requirements);

True Triaxial Cubic Hydraulic Press — Core Functions & Application Fields

1. Core Equipment Functions

1. True triaxial synchronous ultra-high pressure loading
   Six independent hydraulic rams along X/Y/Z, three orthogonal axes, realize fully separate, synchronized pressure control, generating uniform isotropic ultra-high pressure up to 8–20 GPa inside the synthesis chamber. It precisely simulates the extreme stress environment of the Earth’s mantle and crust, solving the uneven pressure defect of ordinary cubic presses.
2. Integrated high-temperature heating system
   Supports direct/indirect carbon tube heating, temperature range from ambient temperature to 2500°C, with temperature control accuracy ≤±5°C. It creates stable HPHT (High Pressure High Temperature) reaction conditions required for superhard material crystallization and sintering.
3. Closed-loop precision intelligent control
   Computer servo system independently regulates pressure, displacement, and temperature of each axis in real time; high-precision sensors monitor stress, strain, and heating status, with automatic fault alarm and stable pressure holding for long-cycle synthesis.
4. Large uniform synthesis cavity
   Adopts a high-rigidity frame and tungsten carbide anvils, featuring a large effective cavity volume, balanced force bearing, and low anvil wear, supporting mass continuous industrial production and advanced laboratory material research.
5. Multi-condition coupled simulation function
   An optional partial differential stress adjustment module can simulate anisotropic deep geological stress, applicable to rock mechanics, geophysics, and frontier material research besides mass production.

2. Industrial Production Applications (Main Commercial Scenarios)

(1) Superhard Material Manufacturing (Core Application)

• Synthetic diamond series
  Industrial diamond powder, single-crystal diamond, jewelry-grade lab-grown gem diamonds, diamond wire saw blanks.
• PDC / PCD / PCBN cutting blanks
  Polycrystalline Diamond Compact (PDC cutters) for oil & gas drill bits, coal mine roadheaders, tunneling machinery; PCD tool inserts for metal cutting; cubic boron nitride PCBN for hard alloy machining.
• Other superhard products: superabrasives, diamond composite substrates, binder-free ultra-hard polycrystalline materials.

(2) Synthetic Gemstone Production

Lab-grown white diamond, colored diamond, moissanite, and other man-made gemstones for the jewelry industry.

(3) Advanced New Material Synthesis

Synthesize special functional materials under HPHT: superconducting materials, high-density ceramics, magnetic materials, rare-earth functional crystals, and high-pressure insulating materials.

3. Scientific Research & Frontier Laboratory Applications

1. Geological & Earth Science Research
   Simulate high-pressure deep crust/mantle environment, rock deformation, mineral phase transition, hydraulic fracturing, and deep underground stress test for mining and geophysical exploration.
2. National Major Scientific Facilities Matching
   Support high-pressure neutron diffraction and synchrotron radiation in large science platforms (e.g., CSNS China Spallation Neutron Source) for in-situ material microstructure observation under extreme HPHT conditions.
3. New Material R&D Laboratory
   Develop novel ultra-hard, energy storage, and catalytic materials for new energy, aerospace, electronic semiconductor, and biomedical fields.

4. Brief English Version (For Catalog/Product Page)

Functions

This true triaxial cubic hydraulic press adopts six-axis independent synchronous pressurization to build a stable ultra-high pressure & high-temperature reaction environment (up to 20 GPa, 2500°C). Equipped with intelligent closed-loop control, it ensures uniform stress distribution inside the synthesis cavity for stable long-cycle material sintering and crystallization.

Applications

1. Mass production of superhard materials: PDC cutters, synthetic diamond single crystal & polycrystal, cubic boron nitride, diamond wire raw materials;
2. Manufacture of lab-grown jewelry diamonds and synthetic gemstones;
3. R&D of advanced functional materials, superconducting crystals, and high-performance ceramics;
4. Geological mechanics simulation and high-pressure physical research for scientific institutions.

What is the rCB production line？

The RCB (Recovered Carbon Black) production line, also known as the recycled carbon black production line, is an environmentally friendly resource utilization system that converts rubber waste, such as used tires into high-value recycled carbon black through pyrolysis and deep processing. The core is to achieve the recycling from “black pollution” to “black gold”.

Cronus offers a complete rCB production line, which includes: ultra-fine carbon black grinding machine system, dust collector system, packaging and stacking system, and iron removal system. The packaging machine is equipped with a vacuum-sealing package system.

The equipment used by this customer for grinding carbon black into powder is the CRGM80 ultra-fine grinding machine from Cronus.

Performance parameters of the CRGM80 carbon black ultra-fine grinding machine

Processing Capacity	2-4 tons/hour
Power Consumption	143kw
Main Unit Power	75kw
Input Size	<20mm pyrolyzed carbon
Output Fineness	325-2500 mesh (D97≤5μm)
Energy consumption for producing one ton	25-30 kw

Production Principle

Cronus’s ultra-fine grinding machine equipment perfectly meets our production requirements. Both in terms of product fineness and output, it performs extremely well. It is approximately 28% more energy-efficient than other grinding machines. In the future, when we expand our production capacity, we will still prefer to collaborate with Cronus.

More About The Canton Fair

The Canton Fair, officially known as the China Import and Export Fair, stands as one of the world’s largest and most influential comprehensive international trade events, serving as a golden gateway for global business exchanges. What truly distinguishes this fair from others is its exceptionally rigorous enterprise review process and high entry thresholds—standards that have been strictly enforced for decades to ensure only the most qualified entities gain access.​

To secure a booth at the Canton Fair, enterprises must undergo a multi-dimensional assessment that leaves no room for mediocrity. This process begins with a thorough verification of legal credentials, including business licenses, tax registration certificates, and import-export qualifications, to confirm the company’s legitimate operation and long-term compliance. Beyond legal compliance, the review panel places heavy emphasis on core competitiveness indicators: enterprises are required to demonstrate stable production capacity (backed by factory audits and production line inspections), a strong R&D capability (evidenced by patents, technical certifications, or innovation awards), and a proven track record of quality management (such as ISO certifications or industry-specific quality standards). Additionally, factors like market reputation, export volume over the past three years, and the ability to meet international market demands (e.g., compliance with EU CE, US FDA, or other regional regulations) are all carefully evaluated. Any shortfall in these areas results in immediate disqualification, making the Canton Fair’s selection process one of the most stringent in the global trade exhibition industry.​

For enterprises that successfully pass this arduous review, participating in the Canton Fair is far more than just an opportunity to showcase products—it is a tangible recognition of their strength. Being granted access to the fair signals to global buyers that the enterprise has met the highest standards of credibility, quality, and competitiveness. It means the company’s products are not only marketable but also reliable enough to withstand international scrutiny; its production system is robust enough to fulfill large-scale orders; and its brand has the potential to thrive in the global marketplace. In essence, every exhibitor at the Canton Fair is a “certified strong player” in their industry—an endorsement that carries immense weight in building trust with partners and expanding global business horizons.

More About Cronus：

Shanghai Cronus machinery Co,.Ltd.is the subsidiary of Guilin Mining Machinery Co., Ltd. (formerly Guilin Mining Machinery Factory), Guikuang Mining Machinery founded in 1973, is the backbone enterprise of Guangxi machinery industry, the first batch of outstanding scientific and technological enterprises in Guangxi, and one of the two major manufacturers of grinding equipment designated by the former Ministry of Electrical and Mechanical Services. In 2013, the enterprise was restructured from a state-owned enterprise to a private enterprise. In 2019, the enterprise was relocated as a whole, from Lingchuan County to the Guilin High-speed Railway Economic Industrial Park.

Cronus is mainly engaged in the research and development and manufacture of various powder equipment such as vertical roller mills, superfine roller mills, Raymond mills, hydrated lime production lines, ultrfine ring roller mills, separators, crushers, sand making machine, sand and powder integrated grinding machine etc., as well as the professional development and design of a complete set of powder making production lines. The R&D team has established an industry-university-research base with colleges and universities and built a technological innovation platform. GUI KUANG has core independent intellectual property rights and independent export rights, and has passed the ISO9001:2015 quality management system certification and won the GB/T29490-2013 intellectual property management system. GUI KUANG is certified as a national high-tech enterprise, autonomous region enterprise technology center, autonomous region specialized, refined, and new small and medium-sized enterprises. As the first batch of manufacturing single champion demonstration enterprises in Guangxi, etc., GUI KUANG is the main industry standard of JB/T 4084-2017 “pendulum mill” Drafting unit.

Cronus has been focusing on the powder processing field for 50 years, meeting customer needs as its responsibility, establishing a complete marketing service system, and striving to create a new green and environmentally friendly mill in China with the cultural concept of integrity, innovation, excellence, and win-win. Development, creating value for customers, creating opportunities for employees, and creating wealth for society, GUI KUANG has become a major domestic powder equipment manufacturing enterprise and an important export base.

Application of the TH series Bucket elevator

Building materials industry: In the cement production process, it can be used to lift materials such as cement raw materials and clinker, facilitating the transportation of materials during the production stage; in the sand and gravel quarry, it can transport crushed stones and sand to the designated locations, making subsequent processing more convenient.

Chemical industry: It can transport powdered or granular chemical raw materials such as fertilizers and alkali powder. Its stable conveying performance helps ensure the continuity of raw material supply in chemical production.

Food industry: During the process of grain storage and processing, it can lift grains from the ground to storage equipment, or transport raw materials on the processing line to meet the material transportation needs of the food industry.

The TH series bucket elevator uses forged ring-shaped chains as the traction components. The chains are wound around the upper and lower sprockets. During operation, the bottom hopper will load the materials by extracting, and then move upward along with the rotation of the chains. When it reaches the top position, the materials will be discharged through a mixed or gravity-based unloading method to complete the vertical material transportation.

Chain: A high-round ring chain made of alloy steel, forged and treated with carburizing and quenching process. It shows corresponding performance in terms of tensile strength and wear resistance, which helps to reduce the frequency of equipment maintenance.

Enclosure: The middle part of the enclosure has two designs: single-channel and double-channel. The single-channel is suitable for regular conveying scenarios, while the double-channel can handle situations with larger conveying capacity or the need to convey multiple types of materials simultaneously. The constant force automatic tensioning device in the machine’s heavy hammer box can maintain the chain tensioned state, ensuring the stability of the equipment’s operation.

Sprocket: The sprocket adopts a replaceable rim combination structure. When the rim is worn out, simply unscrew the bolt to remove and replace it. This facilitates maintenance operations and can save some maintenance time.

Conveying capacity: Compared with some other models of bucket elevators with the same bucket width, the TH type bucket elevator has certain advantages in conveying capacity. The improved model also has a corresponding increase in conveying capacity, which can meet the material conveying requirements for some large-scale production.

Operating status: The equipment operates smoothly with minimal noise. The gravity-based automatic tensioning device at the bottom can maintain the tension force, preventing chain slippage or disengagement. When the hopper encounters accidental situations such as jamming, it can also provide certain protection, reducing the probability of equipment failure.

Scope of application: Applicable to the transportation of powdery, granular, and small blocky low-abrasive materials with a bulk density less than 1.5t/m³, such as coal, cement, crushed stones, sand, fertilizers, grains, etc. At the same time, it can transport materials with a temperature not exceeding 250℃. It can be applied in multiple industries.

Limestone is also known as travertine. It is a type of carbonate mineral and one of the common rocks in the Earth’s crust. Its crystal structure is similar to that of calcite, and it usually takes the form of a rhombohedron. The crystal faces often curve into a saddle shape.

Limestone possesses both physical stability and chemical reactivity. Its key characteristics include:

Hardness: The Mohs hardness ranges from 3.5 to 4.0, which is considered medium hardness. It is easy to process and carve.

Density: 2.8 – 2.9 g/cm³. The relative density is moderate, making it convenient for transportation and usage.

Crystal structure: In the form of a rhombohedron, the crystals are often in a curved saddle shape, and the aggregates are mostly in granular or block-like forms.

Luster: Exhibits a glass-like luster, with a smooth surface and excellent reflective properties.

Color: Mainly grayish white, but may take on other colors such as grayish green, grayish yellow, or pink due to the presence of impurities.

Calcite, as a widely existing mineral in nature, is classified mainly based on factors such as its formation process and chemical composition. According to the formation stage and composition, calcite can be divided into several types:

Congenital dolomite: Dolomite formed in the early stage of sedimentary lithification, with uniform and dense structure and fine grain size.

Diagenetic dolomite: Dolomite formed during diagenesis, where calcium carbonate is replaced by magnesium ions, featuring a fine-grained structure and evidence of the replacement process.

Post-depositional dolomite: Dolomite formed by the replacement of consolidated limestone by magnesium ions, featuring an uneven replacement structure and coarse-grained calcite particles.

Limestone, with its unique physical and chemical properties, abundant resource reserves and diverse processing methods, has shown great potential for wide application in fields such as environmental protection, refractory materials, ceramics, and others.

The transformation of dolomite from basic minerals to high-value-added products cannot be achieved without the support of efficient and intelligent grinding equipment. The Shanghai KoliRik ultra-fine ring roller grinding machine and Raymond grinding machine form the core of the “low energy consumption, high precision, zero pollution” grinding ecosystem.

he raw materials are uniformly and quantitatively continuously fed into the main grinding chamber by the variable-frequency belt feeder for grinding. The ground materials are sent into the classifier by the fan airflow for classification. Under the action of the classifier, the materials that do not meet the fineness requirements fall back into the grinding chamber for re-grinding, while the qualified materials are carried by the airflow through the pipeline and enter the cyclone collector for separation and collection. Then, they are discharged through the discharge device to become the finished powder. The separated airflow passes through the return air duct at the top of the cyclone collector and enters the fan. This production system operates under negative pressure and closed conditions, and is equipped with a pulse dust collector to prevent dust from spilling out. It complies with national environmental protection standards.

The motor drives the reducer to rotate the grinding disc. The materials are sent into the center of the grinding disc through the lockwind feeding equipment. Under the action of centrifugal force, they move to the edge of the grinding disc and enter the grinding roller path. Under the pressure of the grinding rollers, the materials are crushed by being squeezed, ground and sheared. At the same time, hot air is ejected from the wind ring at high speed, blowing the powderized materials up. Coarse particles are blown back for re-grinding, the suspended materials are dried, and the fine powder enters the separator for classification. The qualified fine powder is discharged with the airflow and collected by the dust collection equipment. The coarse powder falls back onto the grinding disc under the action of the separator and is re-grinded together with the new materials, completing the grinding operation in a cycle.

mobile diesel wood chipper

wood chipper

Widely used in mushroom material crushers, various strain material crushers, the preparation sections of industries such as papermaking, edible fungi, machine-made charcoal, particleboard, sawdust board, high-density board, medium-density fiberboard, and single wood powder (sawdust) bases. The raw materials are mainly logs and branches.

The wood chipper is a new type of ideal mechanical equipment for the pre-processing of wood powder. It can process raw materials such as wood and branches into wood chips in one go. It has the advantages of low investment, low energy consumption, high efficiency, good economic benefits, and convenient use and maintenance. This wood chipper is especially suitable for the processing of wood chips in the culture medium of edible fungi.

It is mainly composed of a chipping device, a crushing device, and a fan. The wood chips cut by the chipping device have a small particle size and can be sent to the crushing device for further crushing without drying. The finished wood chips after crushing are blown out by the blades on the rotor. The whole set of equipment is driven by only one electric motor, with a simple structure, a compact layout, a low selling price, stable operation, low energy consumption, high output, good quality of the finished wood chips, and low processing costs. It can also be used for cutting fibrous stalk-like materials such as bamboo, thatch, corn stalks, and sorghum stalks. This wood chipper can also be used as raw material for particleboard, sawdust board, and high-density board.

This wood chipper can process pine, miscellaneous wood, poplar, fir, and raw bamboo. Due to its compact structure, small footprint, good chipping quality, low power consumption, and suitability for mobile operations, it is widely applicable to the material preparation section of small and medium-sized particleboard and fiberboard enterprises, and can also be used by individual households for the production of commercial wood chips.

1.Adjustment of the Tightness of the V-belt of the Wood Chipper. When the V-belt is too tight, the motor bearing will heat up. When it is too loose, the rotational speed will decrease, and the V-belt is likely to slip. These situations will affect the service life. When adjusting the tension of the V-belt, loosen the bolts fixing the motor base, and use the adjustment bolts to change the position of the motor on the slideway. After the V-belt reaches the required tightness, tighten the fixing bolts.

2.After the wood chipper motor has been operating for a certain period of time, it is necessary to add oil or open and clean the bearings, and then refill with lithium-based lubricating oil to restore the lubricity of the bearings.

3.If the knives of the wood chipper are not of high quality, it is likely to cause situations such as broken knives and waste materials. This situation is generally caused by the inconsistent rotation center of the main shaft of the wood chipper and the center of the knives during the processing, that is, they are not concentric. When the main shaft is running at high speed, if the main shaft and the knives are not concentric, it will not only affect the forming degree of the processed wood chips and the yield of finished products, but also affect the processing effect.

4. The power cord of the wood chipper motor should not be too long or coiled. This can easily cause under-voltage or under-current in the motor. We know that the operating voltage of the motor is 380 volts, and the operating current is marked on the motor nameplate. The rated current of the wire must be greater than the rated current of the motor. Otherwise, the motor is likely to overheat or burn out under conditions of under-voltage or under-current. This is very dangerous for the wood chipper motor.

Cronus Machinery Co., Ltd. can customize the production of various types of wood chippers, wood chipper shredders, wood powder grinding machines, and biomass pellet machines. According to the actual needs of customers, mobile and fixed machines can be customized, and they can also be equipped with diesel engines or electric motors as the power source.

The sawdust crusher, also known as the hammer mill, is a widely used crusher at present. It has a relatively high output per kilowatt-hour, good versatility. Some hammer pieces are hinged to the rotor. When metal foreign objects enter the crusher, only the sieve plate will be broken, and no major accidents will occur. However, the particle size of the crushed material is uneven, and there is more powder.

Its structure consists of three parts: the feeding mechanism, the crushing chamber (rotor, hammer pieces, sieve plate, tooth plate), and the discharging part (fan, aggregate cylinder, dust collection bag). During operation, the feed enters the crushing chamber from the feeding mechanism, flies towards the tooth plate under the impact of the high-speed rotating hammer pieces, rebounds after colliding with the tooth plate, and is hit by the hammer pieces again. At the same time, the feed also undergoes intense friction between the sieve surface and the hammer pieces.

Under the repeated impacts, collisions, and frictions, the feed is gradually crushed. For crushers without a fan, the crushed material is discharged through the sieve holes by the airflow in the crushing chamber. For crushers with a fan, after the crushed material is drawn out from the sieve holes, it still needs to pass through a powder collection device (such as an aggregate cylinder, dust collection bag, etc.) to separate the air in the mixed airflow from the crushed material.

Wood powder machines are mainly divided into standard wood powder machines, ultra-fine wood powder machines, ordinary wood powder machines, vertical wood powder machines, stainless steel wood powder machines for Chinese herbal medicines, and air-selected wood powder machines. The standard wood powder making machine is another new product of our company in the wood powder machine market. This product can ensure the standard rate of the finished product, solve the inconvenience caused by uneven fineness of the finished product. It is internally equipped with a standard stainless-steel screen, and the mesh number can be selected and standardized arbitrarily. It occupies a small area, is convenient for packaging, easy to operate, and has absolutely no dust pollution. It is an ideal powder-making equipment.

high-chromium alloy rollers for Raymond mill

high-chromium alloy ring for Raymond mill

The picture on the left shows the high-chromium alloy grinding rollers and grinding rings customized by Cronus Machinery Co., Ltd. for a customer in Pakistan. These are mainly used in the 130 model of the Raymond mill. It is known that the customer processes talc and has very high requirements for the whiteness and purity of the product.

The wear-prone parts of the Raymond mill can be customized to be made of high-chromium alloy. This material can significantly reduce the wear of the grinding rollers and grinding rings, greatly extending the service life of the equipment.

Cronus Machinery Co., Ltd. not only can customize the materials for your grinding rollers and grinding rings, but also can provide overall customization for the materials of components such as pipes and fans. For instance, it can replace ordinary cast steel with stainless steel to significantly improve the purity of the fine powder. Additionally, by adding high-strength magnetic separators, the content of iron powder can be reduced. In summary, you can boldly express your product requirements, and the rest will be handled by our technical engineers. We will carefully consider your product requirements and tailor-make suitable production line equipment for you.

What is Raymond Bowl Mill?

Raymond bowl mill, also known as Raymond mill, Raymond bowl mill pulverizer etc, is a widely used powder grinding equipment. The following introduces it from aspects such as its basic structure, working principle, and application scope:

Main Machine: It is the core part of the Raymond bowl mill, consisting of the frame, air inlet volute, scraper, grinding roller, grinding ring, housing, and motor. The grinding roller and grinding ring are the components directly used for grinding materials. The motor drives the grinding roller to roll on the grinding ring through the transmission device.

Analyzing Machine: Also called the powder separator, it is located above the main machine and is used for classifying the ground materials. By adjusting parameters such as the rotation speed of the analyzing machine, the fineness of the finished materials can be controlled.

Blower: It provides the airflow power for the entire system, enabling the ground materials to rise and enter the analyzing machine for classification under the action of the airflow, and forming a circulating airflow within the system.

Finished Product Cyclone Separator: It separates the qualified fine powder classified by the analyzing machine from the airflow and collects it as the finished product. The airflow then returns to the blower through the return air duct at the upper end of the cyclone separator to form a cycle.

Feeding Equipment: Such as The electromagnetic vibration feeder, it is used to evenly, quantitatively, and continuously feed the materials into the grinding chamber of the main machine for grinding.

After large – sized materials are crushed to the required particle size by the jaw crusher, they are sent to the storage hopper by the elevator, and then evenly, quantitatively, and continuously sent into the grinding chamber of the main machine by the vibration feeder. Inside the main machine, the grinding roller presses tightly against the grinding ring under the action of centrifugal force. The scraper scoops up the materials and sends them between the grinding roller and the grinding ring, and the materials are crushed into powder under the action of rolling pressure. Then, the powdered materials are blown up by the fan and pass through the analyzing machine. The materials that meet the fineness requirements pass through the analyzing machine, while those that do not meet the requirements return to the grinding chamber for further grinding. The materials that pass through the analyzing machine enter the cyclone separator for separation and collection. The exhaust air is separated by industrial filter cloth to form powder in one process.

It is used to grind various ores into powder for subsequent processing and extraction of valuable minerals, such as the grinding of talc, dolomite, gypsum, calcite, carbon black, calcium carbonate, iron ore, copper ore, gold ore, etc.

Calcined Lime

dolomite

calcite

talc

Kaolin

limestone

The maintenance of Raymond bowl mills is crucial for ensuring stable equipment operation, extending service life, and improving production efficiency. The following introduces the key maintenance points of Raymond bowl mills from aspects such as daily maintenance, key component maintenance, and lubrication management:

• Pre-start Inspection: Before starting the Raymond bowl mill, a comprehensive inspection of the equipment is required. Confirm that all components are firmly connected and that there are no loose bolts; check whether there is residual material or foreign objects inside the main machine, and clean them up promptly if any; check whether the rotating components of the analyzing machine, blower, feeder, and other equipment are flexible and free from jams; ensure that the electrical system is correctly wired, the instrument display is normal, and there are no safety hazards such as electric leakage or short circuits; check whether the lubricating oil level in the lubricating oil tank and bearing housing is sufficient and the oil quality is good. If the lubricating oil is deteriorated or the oil level is insufficient, replace or replenish it promptly.
• Operation Monitoring: During the operation of the equipment, operators should closely monitor its running status. Judge whether the equipment load is normal by observing instrument data such as current and voltage. If abnormal current fluctuations or unstable voltage are found, stop the machine immediately to check the cause; listen to the running sounds of various parts of the equipment. Under normal circumstances, the running sound of the equipment is stable and regular. If abnormal friction, impact, or vibration sounds occur, it may be caused by component wear, looseness, or other faults, and immediate shutdown for troubleshooting is required; pay attention to observing whether the particle size and output of the finished product are stable. If the fineness of the finished product does not meet the requirements or the output drops significantly, it may be due to abnormal rotation speed of the analyzing machine, severe wear of the grinding roller and grinding ring, etc., and adjustments or repairs should be carried out promptly.
• Post-shutdown Cleaning: After each shutdown, the residual materials on the surface and inside of the equipment should be cleaned up promptly to prevent material accumulation from affecting the next startup and normal operation of the equipment. When cleaning the inside of the main machine, focus on removing the materials attached to the grinding roller, grinding ring, and scraper to avoid material caking from affecting the grinding effect; clean the cyclone separator, pipes, and other parts to prevent material blockage and ensure smooth ventilation; regularly clean the dust inside the electrical control cabinet to prevent dust accumulation from affecting the normal operation of electrical components and reducing the probability of failures.

Cronus offers you a variety of Raymond bowl mills, including spare parts for Raymond 312a bowl mill, 4R3220 Raymond bowl mill, 1700 Raymond mill, MTW Raymond mill, Raymond 312 bowl mill, Raymond 533 bowl mill, Raymond 633 bowl mill, and other brands. You can also buy the whole Raymond mill production line from Shanghai Cronus. All of our machines are with CE, ISO9001 certification.