Raymond mill or Raymond grinding mill is widely applied to the high-fine powder processing of the over three hundred kinds of non-flammable and non-explosive materials whose Moh’s hardness is not greater than 9.3 and the humidity is less than 6% in the industries of mining, chemical and construction and other industries. These materials include barite, calcite, feldspar, talc, marble, limestone, dolomite, fluorite, lime, activated clay, activated carbon, bentonite, kaolin, cement, phosphate rock, gypsum, glass, insulation materials etc. The particle size of the finished products can be adjusted in the range of 80 -325 mesh and the granularity of part of the materials can be up to 2000 mesh. Raymond mill is a impotrant mining crusher in mining industry.

1.Heat Treatment

Heat treatment takes much ladder hyperbolic process, it including quenching and tempering. The process parameters and closely related section thickness, producing different casting, the parameters of different.

In addition, because of the materials alloy content high, thermal conductivity is poor, casting stress is great, and Raymond Mill wear-resistant casting parts are work under high stress. Therefore must be approved by eliminating stress heat treatment, to prevent early fracture.

2. Casting Process

High chrome alloy cast iron material has the alloy content high, good fluidity, shrinkage, poor thermal conductivity of characteristic. So in design its casting modelling process, take directional solidification principle. And in order to strengthen the riser fill shrinkage effect of castings, impact hammer, counterattack by large and thick plate castings made poured rain type insulation riser cast method.

3. Melting Process

CYK type high aluminium alloy cast iron melting inside Mid-frequency induction furnace. Melting temperature should reach to 1500~1550℃ to ensure the alloy melt and fully spread. To prevent casting organization coarse grains or appear cold-lap, wrinkled skin, casting temperature should be control in 1360 ~ 1380 ℃.

In the development process of Raymond Mill wear-resistant parts, from raw material to finished products, it mainly experienced L melting process, casting process, heat treatment.

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