Introduction to Raymond Mill

Raymond mill is widely used for grinding non-flammable and non-explosive materials whose Moh’s hardness is below 9.3 and humidity less than 6% such as barite, calcite, potassium feldspar, talc, marble, limestone, dolomite, fluorite and lime, activated clay, activated carbon, bentonite, kaolin, cement, phosphate rock, gypsum, glass and thermal insulation materials in mine, metallurgy, chemistry and building industry. The granularity of the final products can be adjusted in the ranges of 80-325 meshes and part materials can reach 600 meshes. Raymond mill can usually be called grinding plant, Raymond pulverizer, Raymond grinding mill and Raymond grinder.

The grinder mill produced by Hongxing Machinery adopts advanced structure of the same products in the domestic and foreign market and is upgraded and improved on the basis of traditional Raymond mill in the same industry. Compared with ball mill, this equipment has higher efficiency, low electricity consumption, small floor space and small one-time investment. The grinding roll tightly presses on the grinding ring under centrifugal force; for this reason, when the grinding roll and the grinding ring are abraded, the output and the fineness of the final products are not influenced. The changing cycle of the grinding roll and the grinding ring is long. The air separation flow of this machine cyclically flows inside the air blower, mill case, cyclone separator and air blower, so that compared with high-speed centrifugal crusher, this machine has little powder dust and the operational workshop is clean. 

Structural Features of Raymond Mill

This machine is mainly composed of main engine, analytical engine, air blower, clone separator for final products, clone separator for micro powders and air pipe, and the main engine is composed of rack, inlet air volute, relieving tool, grinding roll, grinding ring and cover piece. 

Hongxing Raymond grinder is widely used for grinding non-flammable and non-explosive materials whose Moh’s hardness is below 9.3 and humidity less than 6% such as barite, calcite, potassium feldspar, talc, marble, limestone, dolomite, fluorite and lime, activated clay, activated carbon, bentonite, kaolin, cement, phosphate rock, gypsum, glass and thermal insulation material in mine, metallurgy, chemistry and building industry. The granularity of the final products of the R type Raymond mill can be adjusted in the ranges of 80-325 meshes and part materials can reach 600 meshes. 

Working Principle of Milling Equipment

When the milling equpment works, the materials that need to be crushed are fed into the machine through the feeding hopper. The grinding roll that hangs on the main engine will rotate around the vertical axis and rotates around itself. Due to the centrifugal force produced in the rotating process, the grinding roll will swings outward and tightly press onto the grinding ring to make the relieving tool scoop up the materials and send them to the space between the grinding roll and the grinding ring, and the materials will be crushed due to the rolling and grinding of the grinding roll.

Air Separation Process of Clinker Grinder

After the materials are ground, the air blower blows the air into the shell of the main engine and blows the powders, and the analytical engine on the upper part of the grinding room will separate the powders. The coarse materials will fall to the grinding room for re-grinding, and the materials whose fineness meets the specification will go into the cyclone air collector with the air flow and are discharged from the powder discharging mouth to become final products. The air flow returns to the air blower through the air returning pipe on the upper end of the cyclone collector, and the air runs cyclically and flows under the negative pressure, and the increased air in the cycle will be discharged through the waste pipe between the air blower and the main engine and go into the small cyclone collector for cleaning.