Kinetic Investigations into the Distillation of Nonferrous Metals during Complex Processing of Metallurgical Industry Waste

Abstract

Experimental kinetic studies of reduction and distillation of nonferrous metals into the gas phase during complex processing by electrosmelting of the metallurgical industry waste–the Waelz clinker of oxidized zinc ores of JSC «Achpolimetal» (settl. Achisai, Republic of Kazakhstan)–are performed. The investigation into the mechanism of reduction and distillation of lead and zinc from the Waelz clinker during its electrosmelting was performed in laboratory conditions using the 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 Т = 1973 K for 55 min are αZn = 98,6 % and αPb = 99,6 %, respectively. Zinc is mainly distilled (94–96 %) for first 28–32 min, while lead
is mainly distilled (94–96 %) for 30 min. The apparent activation energies during the distillation of zinc and lead are determined (αZn,Pb = 70 %): Еapp = 127,3 and 146,14 kJ/mole