Application
Chemical purification process and basic principles of barite
Barite is a mineral composed of barium sulfate (BaSO4). Barite ore is often dark brown because it contains impurities such as Fe2O3, MnO and carbon. Industrially, the barite ore is crushed several times to obtain micron-level fine raw material, which is roasted in a roaster for 2.5 hours to become clinker, washed with water to remove alkali, diluted acid washed and then pulped, added sulfuric acid, aluminum powder (acid-soluble, bleached), stirred and reacted for 2.5h at boiling temperature to obtain bleaching material, washed with water to remove soluble salts, filtered and dried (170℃) to become a finished product.
The chemical reaction process of acid-soluble reduction in the reactor is as follows:
Acid soluble: use sulfuric acid to dissolve impurities and colored elements.
[Fe2O3]+3H2SO4=Fe2(SO4)3+3H2O
[MnO]+H2SO4=MnSO4+H2O
[NiO]+H2SO4=NiSO4+H2O
Bleaching: add aluminum powder to generate hydrogen and reduce Fe2+ for bleaching.
2Al+3H2SO4=Al2(SO4)3+3H2
Fe2(SO4)3+H2=2FeSO4+H2SO4