A compound metallurgical furnace for efficiently removing fluorine and chlorine impurities in zinc oxide fume

Abstract

The invention relates to a compound metallurgy furnace for efficiently removing fluorine and chlorine impurities in zinc oxide smoke, and belongs to the technical field of metallurgy. The compound metallurgy furnace comprises an internal separation wall, a smelting dust collecting flue, a volatilization dust collecting flue, a cooling water jacket, a communicator, an air blowing port, a ternary air port, a slag adding port, a cold charge adding port, a slag discharge port and a furnace foundation. A smelting chamber and a volatilization chamber are separated through the internal separation plate to exert different functions; the melting of acid leaching slag is accelerated in the smelting phase; after the acid leaching slag is oxidized and smelted, such impurities as fluorine, chlorine and sulfur in the zinc oxide smoke can be efficiently removed in the smelting phase, and meanwhile, the volatilization of such valuable metals as zinc is reduced; a reducing atmosphere is in the volatilization chamber to generate a lot of CO, so that the higher reducibility is kept, the improvement of the lead and zinc volatilization efficiency is facilitated, and the recovery of the valuable metal is improved; and the compound metallurgy furnace has the advantages of simple operation, easy process control and capability of effectively improving the productivity.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a compound metallurgical furnace for efficiently removing fluorine and chlorine impurities in zinc oxide dust. Background technique [0002] The methods for removing fluorine and chlorine from zinc oxide fume mainly include: high temperature roasting to remove fluorine and chlorine (multiple hearth furnace, rotary kiln), alkali washing method to remove fluorine and chlorine, zinc sulfate solution to remove fluorine and chlorine, etc. The high-temperature roasting removal method has a fluorine removal rate of over 90% and a chlorine removal rate of over 80%, and the removal effect is better, but the equipment investment is large, the fuel consumption is large, and the processing cost is high; the alkali washing method defluorination The rate can reach 90%, the equipment and operation are simple, but the loss of zinc is large, the consumption of water resources is la...

AI Technical Summary

Problems solved by technology

The high-temperature roasting removal method has a fluorine removal rate of over 90% and a chlorine removal rate of over 80%, and the removal effect is better, but the equipment investment is large, the fuel consumption is large, and the processing cost is high; the alkali washing method defluorination The rate can reach 90%, the equipment and operation are simple, but the loss of zinc is large, the consumption of water resources is large, and the wastewater is difficult to treat; the removal of zinc sulfate solution will lead to a certain amount of metal loss, and the defluorination effect is not good.

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