Industrial Experimental Research on Zinc Ingots Processing in RHF with Utilization of Zinc Oxide Powder
The production of zinc ingots in RHF with zinc oxide power can promote the steel zinc cycle industry chain.Zinc ingots were processed by ammonia chlorination and sulfuric acid leaching from zinc ox-ide powder in rotary hearth furnace.When ammonium chloride process was applied to produce zinc ingots,the comprehensive recovery rate of zinc was 88%,the power consumption was 2800-3100 kW·h,the current efficiency of electrolytic process was 86%-87%,the leaching rate of zinc per ton was 92%,and the yield of pure zinc ingots was 48%.When zinc ingots were produced by sulfuric acid leaching,the com-prehensive recovery rate was 90%and a leaching rate was 94%.The electricity consumption per ton of zinc is 3100-3500 kW·h,and the current efficiency is 90%-92%.But all products pure zinc ingots.Ammo-nia chloride process has the characteristics of short flow and it is applicable to process zinc oxide powder in RHF,but it is not as good as sulfuric acid leaching process in term of technical stability,metal recovery,environmental protection and the comprehensive processing cost of the two processes is not of much differ-ence.
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