200 Mesh Coatings Foundry Sand

The coastings foundry sand is a raw material for foundry coastings in the lost foam process(policast process), also known as foundry coasting sand. It is a fine sand, alias high alumina powder, which is filtered by 200 mesh screen.

Ingredients: alumina, bauxite as raw material, processed by high-temperature calcination, aluminum smelting, milling and selected with 200 mesh screen.

Production process of coated sand can be a dry blend method, cold coating method, temperature coating method and a thermal coating method four stages, but now the commonly used production method are thermal coating method.

Thermal coating process: Heat the raw sand to a certain temperature first, then mix it with the resin, solution and calcium stearate, cooling, crushing and screening. Different mixing system are adopted due to differences in formulation.