Electrothermal processing of chrysotile-asbestos wastes with production of ferroalloy and extraction of magnesium into the gas phase

The article presents the results of an experimental study on processing wastes from chrysotile-asbestos production at Kostanay Minerals JSC. An electrothermal technology for extraction magnesium and siliceous ferroalloy is proposed. influence amount coke steel shavings technological parameters obtained alloys determined. derivatographic SEM analyses waste samples are presented. studies included planning experiments using second-order rotatable designs (Box-Hunter plans), graphical optimization parameters, electric melting a charge in graphite crucible single-electrode arc furnace. Adequate regression equations were explaining effect added to degree silicon into alloy concentration alloy. By charge, high-quality FS25 grade ferrosilicon with content 24.4-29.2% FS45 41.6-45% obtained. It was established that 75 85.4% formed presence 33.6-38% 16-20.8% shavings. 30-38% 29.4-40% shavings; 68.6-73.8%.