Overview
What Is an Ultrafine Ring-Roller Mill
The LSM ultrafine mill is a ring-roller grinding machine designed for micron-level powder rather than the coarser output of a pendulum mill. It uses multiple rollers arranged over several grinding stages around a stationary ring, together with a precision classifier that sets a tight cut point. The multi-stage design and high number of rollers give a fine, narrow particle-size distribution that a conventional Raymond mill cannot reach.
Where It Replaces A Jet Mill
It is used for brittle, non-flammable and non-explosive minerals such as calcite, limestone, talc, mica, bentonite, gypsum, graphite and barite. Compared with a jet mill, which uses compressed air to accelerate particles, a ring-roller mill uses mechanical grinding and needs far less energy for the same fineness, so it is the lower-cost choice for high-volume micron powder. The hardness of the feed affects wear-part life, as with any grinding mill.
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Working principle
Multi-Stage Rinding
The drive turns the main shaft and turntable through a reducer, and the turntable drives the rollers. After a crusher reduces the feed, a bucket elevator delivers it to the hopper and then to the center of the turntable. Centrifugal force throws the material outward onto the ring, where it is pressed, rolled and ground, passing from the first grinding chamber into the second and third stages.
Classification and Discharge
The classifier separates the coarse and fine powder. Fine particles pass through the concentrator and leave via the discharge valve as finished product, while coarse material returns for further grinding, and a small amount of dust is cleaned through the blower. Because the grinding chamber contains no rolling bearings or bolts, there is no risk of bolt failure or bearing damage inside the grinding zone.
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Features & Benefits
1. Fine, controlled output. The classifier holds fineness from 5 to 45 micron with a tight distribution.
2. Lower energy cost than a jet mill. Mechanical grinding avoids the high compressed-air demand of jet milling.
3. Long wear life. No bearings or bolts inside the grinding chamber remove common failure points.
4. High collection rate. The concentrator and dust control keep product loss low.
5. Wide capacity range. The three models cover 350 to 6,000 kg/h.
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Specifications
Model
LSM60 LSM80 LSM100 Diameter(mm) 600 800 1000 Piece of ringsAnd rollers Roller 15 21 27 Ring 3 3 3 Max. feeding size(mm) ≤10 ≤10 ≤10 Fineness of products Micron 5-45 5-45 5-45 Mesh 3250-325 3250-325 3250-325 Capacity(kg) 350-2500 600-4000 900-6000 Power (kw) Main frame 37 55 90 Power concentrator 11 18.5 30 Air blower 30 45 75 Overall dimension(L×W×H) (m) 10×2×5.5 11.9×2.7×5.8 14.5×3.8×6.3 Weight of power concentrator(kg) 5200 7000 9500
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