Abstract
In the frame of this work the main parameters of solid-phase reduction process of Sakharinsky deposit iron-chromium-nickel ore, as well as the process of complete carbothermal reduction of ferrous slag from the previous stage with the production of alloyed iron were determined by mathematical modeling: hydrogen consumption, the amount and composition of reduction products at various degrees of iron extraction from ore raw materials at the first stage of reduction (hydrogen), as well as the cost of thermal coal, the composition and amount of alloyed cast iron and the final slag at the second stage of reduction (carbon).
The rational degree of iron reduction from complex ore raw materials ranges from 5 to 10%, which ensures that the nickel content in the resulting ferroalloy is up to 10%. Such ferroalloys can be used for the production of low-alloy grades of steel 10HSND, 15HSND, 17HSND, which are widely used in shipbuilding. Chromium-containing cast iron obtained during the reduction of ferruginous slag, in composition corresponding to foundry cast iron ChS grade. This fact indicates the possibility of implementing a waste-free technology.
Based on the obtained calculated data, a series of experiments was carried out on the solid-phase reduction of the Sakharinsky nickel ore, which resulted in the production of the first "hydrogen" ferronickel.
Keywords:
Hydrogen, solid-phase reduction, complex nickel-containing raw materials, ferronickel, alloyed cast iron.