Panzhihua Iron And High-sulfur Iron Ore Concentrate To Mention The Iron Down The Sulfur Pilot Study

Panzhihua Iron and Steel Group Company is one of the major steel production companies, which occupies an important position in China's steel industry. Panzhihua V-Ti magnetite deposit is one of the world's leading iron ore deposits, the reserves of iron, vanadium, and titanium account for 20%,64%, and 93% of the total reserves in China respectively, and the prospective reserves of vanadium and titanium magnetite are estimated over 20 billion tons, with a variety of valuable metals. The content of iron in the concentrate is only about 53%, the harmful element of sulfur for smelting, however, is higher than 0.6%. Therefore, the aim of this thesis is not only to improve the iron grade of the concentrate, but also to remove the sulfur from the concentrate, thereby improving the quality of iron concentrate.In this thesis, the process mineralogy was conducted using the Panzhihua iron concentrate with low iron and high sulfur, the results show that:The main mineral is titanium-magnetite, sulfur is existing in the pyrite. The gangue minerals are mainly silicon dioxide, carbonate and so on. Based on the process mineralogy results, a joint process by magnetic and flotation technology was developed to improve the grade of iron and reduce sulfur content of the concentrate. The tests of grinding fineness, magnetic strength, flotation dosage, and flotation time were carried out in the thesis, and the results obtained from the comprehensive optimal conditions revealed that the concentrate grade of iron is increased to 57.17%, and the content of sulfur is decreased to 0.26%, the concentrate, hence, reaches the national standard for iron concentrate. Moreover, the sulfur content of the by-product is up to 15.68% with a cobalt grade of 0.41%, which can be used as raw material for the production of sulfuric acid.