Kinetic investigations into the distillation of nonferrous metals during complex processing of waste of metallurgical industry

Abstract

Experimental kinetic studies of the reduction and distillation of nonferrous metals into the gas phase during the complex processing of the metallurgical industry waste—the Waelz clinker of oxidized zinc ores of AO Achpolimetal (settlement of Achisai, Kazakhstan)—by electrosmelting are performed. The investigation into the mechanism of reduction and distillation of lead and zinc from the Waelz clinker during its electrosmelting is performed in laboratory conditions using a Tamman furnace in a temperature range from 1773 to 1973 K. It is established that the degree of transition (distillation) of Zn and Pb into the gas phase at T = 1973 K for 55 min are αZn = 98.6% and αPb = 99.6%, respectively. Zinc is mainly distilled (94–96%) in the first 28–32 min, while lead is mainly distilled (94–96%) in 30 min. The apparent activation energies during the distillation of zinc and lead are determined (αZn, Pb = 70%): E app = 127.3 and 146.14 kJ/mole.