Raymond mill is the ideal equipment for processing bentonite powder. Bentonite has a Mohs hardness of typically 1-3 (very soft) and can have high moisture content (raw ore may reach 10%-15%).This equipment is specially optimized for bentonite‘s high viscosity, easy clumping, and easy blocking characteristics: equipped with an anti-blocking hopper, special shovels, and an air sealing system, and can be preceded by a triple-pass dryer (if needed). Product fineness is adjustable from 80-400 mesh (up to 600 mesh for some), meeting different application requirements such as drilling muds (200 mesh), cat litter (100-200 mesh), and Geosynthetic Clay Liners (200 mesh)
Bentonite Raymond Mill | High Efficiency & Energy Saving, Anti-Sticking & Anti-Blocking-The Grinding Mill Designed for Bentonite Used in Drilling Muds, Cat Litter, Geosynthetic Clay Liners & More
Bentonite is a clay mineral primarily composed of montmorillonite, featuring unique properties such as water swelling, high viscosity, and high cation exchange capacity. It is widely used in drilling muds, foundry, cat litter, geosynthetic clay liners, iron ore pelletizing, detergents, cosmetics, and more. The fineness, moisture content, and swelling index of bentonite powder directly affect its application performance.
Raymond mill is the ideal equipment for processing bentonite powder. Bentonite has a Mohs hardness of typically 1-3 (very soft) and can have high moisture content (raw ore may reach 10%-15%).This equipment is specially optimized for bentonite‘s high viscosity, easy clumping, and easy blocking characteristics: equipped with an anti-blocking hopper, special shovels, and an air sealing system, and can be preceded by a triple-pass dryer (if needed). Product fineness is adjustable from 80-400 mesh (up to 600 mesh for some), meeting different application requirements such as drilling muds (200 mesh), cat litter (100-200 mesh), and Geosynthetic Clay Liners (200 mesh).
Compared with traditional ball mills, the Raymond mill offers significant advantages: compact structure, small footprint, low power consumption, high one-pass powder yield, and uniform product fineness. Our Raymond mill features high-manganese alloy rollers/rings or optional ceramic wear parts to ensure long-term stable operation while meeting strict environmental standards at home and abroad.
Bentonite powder of different fineness is widely used in the following industries:
| Application Industry | Typical Fineness | Value Proposition |
|---|---|---|
| Drilling Muds | 200 mesh (74μm) | Increases mud viscosity and shear force, suspends cuttings, stabilizes wellbore, prevents collapse |
| Cat Litter | 100-200 mesh | High water absorption, rapid clumping, excellent odor control, low dust |
| Geosynthetic Clay Liners | 200 mesh | High swelling capacity, extremely low permeability, used for landfill and water conservancy projects |
| Foundry (Molding Sand Binder) | 100-200 mesh | Improves wet compressive strength, enhances casting surface quality, reduces casting defects |
| Iron Ore Pelletizing | 200 mesh | As binder, improves green pellet strength and drop number, reduces fines |
| Organoclay | 200-325 mesh | After organic modification, used in oil-based drilling fluids, paints, lubricants, etc. |
| Detergents/Cosmetics | 200-325 mesh | As thickening, suspending, and anti-settling agent, improves sensory feel |
| Soil Amendment / Fertilizer | 80-150 mesh | Improves water and nutrient retention, adsorbs heavy metals, regulates soil pH |
The working principle of the Bentonite Raymond Mill is based on centrifugal rolling and air classification, with anti-sticking and anti-blocking optimizations for bentonite‘s high viscosity:
1. Feeding (Anti-Blocking Design)
Raw bentonite may have high moisture content (e.g., 10%-15%) and is inherently sticky. Therefore, the hopper and feeder feature anti-blocking design (such as a vibrating hopper, screw feeder with Teflon or rubber lining). An electromagnetic vibrating feeder uniformly and quantitatively feeds the material into the main unit’s grinding chamber. If needed, a triple-pass dryer can be installed before the Raymond mill to reduce moisture to ≤6%.
2. Grinding (Anti-Sticking Design)
When the main unit is working, the grinding rollers tightly press against the grinding ring under centrifugal force. The material is scooped by a shovel blade and thrown between the rollers and the ring. For bentonite‘s high viscosity, shovel blades are made of special wear-resistant material with an optimized angle, and an air sealing system prevents fine powder from entering bearings. The material is crushed and ground into fine powder.
3. Classification
The ground powder rises with the airflow from the fan to the classifier. The classifier controls the final fineness (e.g., 200 mesh) by adjusting the rotor speed. Qualified fine powder passes through the classifier to the collection system; coarse powder is rejected and falls back into the grinding chamber for regrinding.
4. Collection & Dust Removal
Qualified fine powder enters a pulse baghouse filter with the airflow for collection. The finished product is discharged through a discharge valve and conveyed by a screw conveyor to the finished product silo or packaging machine. Purified exhaust gas is discharged at compliant levels, ensuring clean production.
5. Bentonite-Specific Optimizations
Anti-Blocking Hopper: Prevents bridging and blockage of wet, sticky material.
Air Sealing System: Prevents dust from entering bearings, extending life.
Optional Pre-Drying Configuration: If raw material moisture >6%, a dryer is recommended upstream.
| Model | Roller Qty | Max Feed (mm) | Output (t/h) | Product Fineness | Main Motor Power (kW) |
|---|---|---|---|---|---|
| 3R1410 | 3 | ≤15 | 0.3-1.0 | 80-400 mesh | 11 |
| 3R2115 | 3 | ≤20 | 0.8-2.0 | 80-400 mesh | 22 |
| 3R2615 | 3 | ≤20 | 1.0-2.5 | 80-400 mesh | 30 |
| 3R2715 | 3 | ≤20 | 1.2-3.0 | 80-400 mesh | 37 |
| 4R3216 | 4 | ≤25 | 1.5-4.0 | 80-400 mesh | 55 |
| 4R3220 | 4 | ≤25 | 2.5-5.5 | 80-400 mesh | 75 |
| 5R4119 | 5 | ≤30 | 3.0-8.0 | 80-400 mesh | 110 |
| 5R4121 | 5 | ≤30 | 4.0-12.0 | 80-400 mesh | 132 |
| 6R5525 | 6 | ≤35 | 6.0-15.0 | 80-400 mesh | 200 |
Note: Output data based on typical bentonite with moisture ≤6% after drying. Higher moisture will significantly reduce output. Final specifications subject to material testing results
Optimized for Bentonite Processing: Deep understanding of bentonite's high viscosity, easy clumping, and unstable moisture content. Anti-sticking and anti-blocking design throughout feeding, grinding, and classification ensures efficient and stable production.
Stable Fineness, Excellent Performance: Bentonite powder has concentrated particle size distribution, ensuring key indicators such as viscosity in drilling muds, water absorption and clumping in cat litter, and swelling volume in geosynthetic clay liners.
Significantly Lower Operating Costs: Low power consumption (20-25 kWh/ton), long life of wear parts, high automation, and low labor costs.
Environmental Compliance, Green Production: Fully enclosed negative pressure system + high-efficiency dust collection—no dust leakage, meets domestic and international environmental standards.
Global Service Experience: Our KLV Raymond mills have been exported to over 50 countries and regions including the US, India, Indonesia, Brazil, Turkey, and Russia, providing overseas installation, commissioning, and operation training.
EPC Turnkey Service: From raw material analysis (including drying solutions) to finished product packaging, we provide one-stop solutions for customer convenience
Improve your bentonite powder processing efficiency and explore high-value markets such as drilling muds, cat litter, and geosynthetic clay liners! Contact us today for professional selection advice and a customized solution.
Get Your Customized Solution:
Request a Quote → Tell us your capacity requirement, target fineness, and raw material condition, and we will respond within 24 hoursSchedule a Technical Discussion → Speak one-on-one with our non-metallic mineral grinding engineer
Kolev Equipment Technology Co., Ltd. is a large-scale private technology enterprise specializing in the research, development, production, and sales of mining and metal ore processing equipment. With over 20 years of experience in ultra-fine grinding, industrial drying, and crushing sand making industries, we provide intelligent solutions and mature supporting products worldwide.
Tell us your needs. We will match the best model for you and send a solution + reference quote within 24 hours.
We're here to help with all your inquiries. Send us a message and we'll get back to you promptly.
Fill out the form below and we'll contact you soon
