With more than 20 years experieces, Zhengzhou Great Wall Heavy Industry Machinery Co., Ltd has been a top manufacturer of various stone mills and grinder mills, raymond mill, raymond grinder mill, raymond grinder, raymond roller mill and raymond grinding mill.

The purpose of grinder mill is to grind materials in the fields of building materials, mining, metallurgy and chemical industry. The materials must be non-flammable and non-explosive materials such as: Limestone, calcite, barite, dolomite, feldspar, marble, talcum, gypsum, kaoline, medical stone, rock phosphate, manganese ore, iron ore, glass, ceram, active carbon, fireproof materials, heat preservation materials, chemical materials and so on(300 kinds of materials). The materials should have the hardness less than 7 in Mohs scale and humidity less than 6 percent. The granularity of the end products can be adjusted from 30 to 325 meshes (the minimum is 600meshes).