One of the important working procedures in premixed feed additives production is the grinding of sulphate raw materials.

The traditional production of nitrobenzene has many defects such as consuming a great quantity of sulphuric acid and energy and environmental pollution.

Production technics of producing manganese sulphate, aluminum sulphate, zinc sulphate and ferric oxide series paint using the waste vitriol and byproduct in titanium dioxide production are introduced.