Investigation of Sulfatization Mechanism of Iron-Manganese Concretions in Fluidized Bed

Abstract

The article presents the theoretical basis of sulfatizing roasting in the fluidized bed of oxidic and sulphidic polymetallic raw materials: iron-manganese concretions (IMC) containing non-ferrous metals and pyrite concentrate. The results of preliminary thermodynamic and thermogravimetric studies of IMC of Pacific Ocean and pyrite are described. The results of the laboratory-scale research of sulphatizing roasting of deep-water polymetallic IMC and pyrite concentrates are given. Based on the results obtained, the conclusion is made about the prospects of using the method of preliminary sulfatization for further production of marketable concentrates of manganese and non-ferrous metals.