Based on the results of research of high-grade matte microstructures, a new technical solution for the dehumidification of commercial nickel concentrate was proposed. In the process of laboratory and industrial tests it was determined that the metallized magnetic fraction of high-grade matte can be a positive factor in flotation of rough nickel concentrate.
Studies of the process of sulfur dioxide utilization with the production of bisulfite reagent from waste gases of various pyrometallurgical shops of copper and nickel plants have been carried out. The linear character of kinetic curves of sodium hydrosulfite formation in the range of its concentrations in solution from 0 to 400 g/dm3 has been established as a result of investigations. It was determined that the dependence of the reaction rate constant on the gas flow rate obeys the parabolic law. Graphical dependences of solution pH and concentration of sodium bisulfite in it are plotted. It is shown that at pH decrease from 8.5 to 5.0 the concentration of sodium bisulfite linearly increases, and at pH<4.5 - its decrease is observed.
In this paper the research of new samples of flocculants produced by "Kemira", "Basf" and "SNF FLOERGER" is considered, their technological efficiency is evaluated in comparison with previously tested flocculants: Magnaflok 336, Magnaflok 338, Magnaflok 351 ("Ciba") and Praestol 2530 ("Stockhausen").
