PRODUCTION OF FERROALLOYS AND CALCIUM CARBIDE FROM THE BASALT OF THE DUBERSAY DEPOSIT
The article presents the results of the research on the electrothermal processing of basalt from Dubersay deposit (18.08-18.19% Si; 6.45-6.72% Al; 6.17-6.54% Ca; 3.94-5.22% Mg, 14.96-15.93% Fe; 2.06-2.10% Na; 0.19-0.27% K; 1.09-1.15% Ti; 0.28-0.31% Mn; 0.14-0.15% P; and44.9-45.16% O2) to obtain calcium carbide and ferroalloy.The basalt was processed with electrofusion in a singleelectrode arc furnace using graphite crucible. The researchwas implemented using a second order rototable Box-Hunter plan. The influence of lime and steel shavings on the rate of silicon and aluminum extraction into the alloy, rate of calcium extraction into technical calcium carbide,and the influence on the concentration of silicon and aluminum in the alloy and the capacity of calcium carbide were determined. During the electric melting of basaltfrom Dubersay deposit with the addition of up to 30% of lime, two opposite phenomena are observed: the rate of Ca extraction into calcium carbide and its capacity increase, and the extraction rate of silicon and aluminuminto the alloy and their concentrations in the alloy decrease. Electric melting in the presence of 20.4-30% of lime, 0-2% of steel shavings allows extraction of 72.5-73.5% Si, 68.9-71.7% Al into the alloy (at a concentrationof Si + Al from 50% to 53.0% in the alloy) and to obtain branded calcium carbide with a capacity of 233-305 dm3 / kg.