Centrifugal concentrators are usually used to remove high-density impurities. The hydrocyclone group can also be used to complete the washing and screening operation in the separation of silica sand.

It can not only achieve the purpose of washing and classification, but also remove some impurities, which has good application value. However, it is difficult to obtain qualified silica sand products by gravity separation, and the final qualified products still need to be obtained by magnetic separation, flotation, calcination and other methods.

Silica sand grinding mill almost all silica sand raw ores contain a small amount of iron minerals, generally 0.5% - 3%, mainly including colored impurities such as magnetite, ilmenite, siderite and pyrite.