Method for producing electrolytic zinc by comprehensively recycling high-chlorine high-fluorine lead and antimony smelting waste residue

Abstract

The invention discloses a method for producing electrolytic zinc by comprehensively recycling high-chlorine high-fluorine lead and antimony smelting waste residue. The method is characterized by comprising the following steps of: preparing zinc hypoxide powder from the high-chlorine high-fluorine lead and antimony smelting waste residue by using a rotary kiln, slurrying the zinc hypoxide powder, removing fluorine and chlorine through two-stage alkaline washing, neutrally leaching obtained caustic sludge by using sulfuric acid, performing alum settlement treatment to obtain a purified liquid, and treating by the conventional electrodeposition process to obtain the electrolytic zinc. The invention provides the preparation of the zinc hypoxide powder from lead and antimony waste residue by using the rotary kiln, and the removal of the fluorine and the chlorine through a densification kiln or two-stage alkaline washing after the zinc hypoxide powder is slurried for the first time; the invention is characterized in that: the method is high in production capacity, the fluorine and the chlorine are completely removed, the treated purified liquid can remove a large number of harmful elements and meet electrodeposition requirements, the qualified electrolytic zinc is produced, the recovery rate of zinc reaches 84 percent, various kinds of valuable elements can be recovered, and the like; and the method can be used for the smelting and recovery industry of the lead and antimony waste residue.

Description

technical field [0001] The invention relates to a smelting method, more specifically, the invention relates to a method for comprehensively recycling high-chloride, fluorine, lead, and antimony smelting waste residues to produce electrolytic zinc. Background technique [0002] Lead-antimony smelting waste residue is a common waste resource in my country at present. It contains zinc, lead, indium and other valuable metals, and has a high recovery value. The current processing method generally adopts Woltz enrichment method. The secondary zinc oxide produced by this method has very complex components, and cannot be used alone in the production of electro-zinc in the traditional process, and can only be used in a very small amount. The secondary zinc oxide enriched by the Voltz enrichment method of lead-antimony smelting waste residue has higher impurities, and harmful impurities such as silicon, lead, arsenic, antimony, iron, (divalent) fluorine, and chlorine are higher than ...

AI Technical Summary

Problems solved by technology

The secondary zinc oxide produced by this method has a very complex composition and cannot be used alone in the production of electric zinc in the traditional process, and can only be used in a very small amount.

The secondary zinc oxide enriched by the Voltz enrichment method of lead-antimony smelting waste residue has higher impurities, and harmful impurities such as silicon, lead, arsenic, antimony, iron, (divalent) fluorine, and chlorine are higher than the upper limit requirements in traditional processes Dozens of times or even hundreds of times, and it cannot be used in large quantities for ingredients

And iron (divalent), silicon is high, it is difficult to separate solid and liquid, fluorine, chlorine are high, it is easy to corrode the plate, increase the consumption of the plate, and it is difficult to peel off

At present, there is no better zinc enrichment method for lead and antimony waste slag, so that it can adapt to the electrolytic zinc production process

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