LAUSR

Chemical and phase transformations in aWaelz process-slag – carbon system in the range 1700 – 2100 K at a pressure of 0.1 MPa are modeled. It is established that the maximum degree of iron transferred into condensed Fe3 Si is from 34.7 % at 1800 K to 99.9 % at 2100 K, and into Fe5Si3 from 47.7% at 1900 K to 45.6% at 2000 K. With a further increase in temperature iron starts to be transferred into the gas phase. Silicon, in comparison with iron, is more difficult to recover and with an increase in temperature starts to pass into the gas phase. The degree of nonferrous metal Zn, Cd and Pb transfer into the gas phase is 99.99 % over the whole temperature range. Modeling makes it possible to analyze the possibility of obtaining ferrosilicon from technogenic non-ferrous metallurgy waste by electric melting in an electric arc furnace.