Raymond Mill for Mineral Powder | 80-325 Mesh Grinding Machine

Product Overview

Zhengzhou Sinoma Raymond mills are vertical pendulum grinding machines designed for non-metallic minerals with hardness below Mohs 7, such as limestone, gypsum, calcite, talc, bentonite, barite and phosphate rock. Six models from 3R1510 to 4R3015 cover outputs from 0.3 to 5 t/h at finished fineness of 80–325 mesh (0.045–0.18 mm), with a screening rate of up to 99%.

Compared with ball mills, a Raymond mill needs a much smaller footprint, lower power consumption per ton and less capital investment, which makes it the first choice for medium and small grinding plants producing fillers, building materials and chemical powders.

Working Principle

The Raymond mill forms a complete grinding system together with the bucket elevator, storage bin, electromagnetic vibrating feeder, main mill, analyzer, cyclone collector and blower:

• Feeding – raw material is lifted to the storage bin by the bucket elevator and evenly fed into the grinding chamber by the electromagnetic vibrating feeder.

• Grinding – the scraper and grinding rollers rotate together, scooping material into the gap between rollers and grinding ring, where it is ground by centrifugal rolling pressure.

• Air classification – the blower carries the ground powder to the analyzer; powder meeting the fineness requirement passes through the blades and enters the cyclone collector.

• Collection & recycling – finished powder is separated and discharged through the unloader; oversized particles fall back into the grinding chamber for re-grinding, while clean air returns to the blower through the return-air duct.

Key Features

• Vertical, compact structure – complete production system from raw material feeding to packing on a small footprint, ideal for confined plants.

• High screening rate up to 99% – precise air classification delivers stable, uniform fineness of 80–325 mesh.

• Low energy consumption – closed gearbox and pulley transmission, centrifugal grinding at low power; typically 30–50% less energy per ton than ball milling for the same product.

• Reliable, durable construction – key parts manufactured from high-quality castings, grinding rollers and rings are wear-resistant and easy to replace.

• Centralized automatic control – one electrical panel controls feeding, grinding, classification and collection; low labor requirement.

• Integrated dust-free system – cyclone collector plus optional bag filter keep the plant clean and compliant with environmental requirements.

Applications

• Building materials – limestone, gypsum and slag powder for cement, mortar and putty production.

• Non-metallic minerals – calcite, talc, barite, bentonite, kaolin, dolomite and wollastonite fine powder.

• Chemical & metallurgical industry – powder for pigments, fillers, fertilizers and flux materials.

• Agriculture & environmental – desulfurization limestone powder, activated carbon and feed additives.

How to Select the Right Raymond Mill

Selection is based on material hardness, feed size, target fineness and required capacity:

• Output below 1.2 t/h – choose 3R1510 or 3R2115 for small plants and pilot lines;

• Output 0.7–3 t/h – choose 3R2615 or 3R2715, the most widely used models;

• Output 1–5 t/h with coarser product – choose 4R3016 or 4R3015 with a larger grinding ring diameter.

For fineness finer than 325 mesh or moisture above 6%, our engineers will recommend a mill with an upgraded analyzer, hot-air drying system, or a combined ball-mill circuit. Send us your material, feed size and target fineness – we will confirm the model and provide a complete plant layout within 24 hours.

Related Guides and Equipment

• What Is a Raymond Mill and How Does It Work?

• Working Principle and Structural Analysis of Raymond Mill

• Raymond Mill: A Complete Guide for Efficient Powder Grinding

• Setting Up a 10 TPH Raymond Mill Plant: Layout and Investment

• Raymond Mill vs Ball Mill: How to Choose the Right Technology

• Choosing the Right Grinding Mill: Raymond, Vertical and Ultrafine Mills

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