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Process for recovering plumbum and silver from waste slag of metal smelting

A metal smelting and waste slag technology, applied in the field of lead and silver recovery technology, can solve the problems of secondary environmental pollution, low recovery rate, complex lead and silver recovery process, etc., and achieve the effect of improving comprehensive recovery capacity and reducing resource waste.

Inactive Publication Date: 2013-02-13
永兴县庚仁银业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing precious metal recovery process, such as: lead and silver recovery process is relatively complicated, and the recovery rate is low, and the secondary environmental pollution is serious

Method used

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Examples

Experimental program
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Embodiment 1

[0016] A process for reclaiming lead and silver from metal smelting waste slag, comprising the following steps:

[0017] (1) Put the smelting waste slag containing lead and silver into the combustion furnace for high-temperature combustion, and use the characteristics of high melting point of Cu and other metals to make Cu and other metals form scum and be removed. The dross is sent to the blast furnace;

[0018] (2) The anode made of Pb is sent to the electrolytic cell for further evolution and removal of impurities. The electrolytic cell uses a mixed solution of fluorosilicic acid and lead fluorosilicic acid as the electrolyte, and the electrolytic residual electrode is washed with anode slime and then returned to the melting furnace for refining;

[0019] (3) The cathode Pb produced by the electrolytic cell needs to be refined in an electric Pb pot. The slag removal temperature is controlled at 420°C, and the electric Pb pot is controlled to cast ingots at 480°C to obtai...

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PUM

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Abstract

The invention discloses a process for recovering plumbum and silver from waste slag of metal smelting. The smelting waste slag containing the plumbum and the silver is firstly placed into a combustion furnace for high-temperature combustion, smelted plumbum after purified is cast into an anode, dross generated in the furnace is conveyed into a blast furnace, the anode cast by the plumbum is conveyed into an electrolytic bath for further purification, cathodic plumbum is generated in the electrolytic bath, the cathodic plumbum is refined through an electric plumbum pot, and anode mud generated by the electrolytic bath and added bismuth and antimony are together conveyed into a reverberatory furnace for treatment, waste slag containing silver and zinc is conveyed into a cupellation furnace for smelting, the separation of the silver form other impurities is achieved, and obtained coarse silver or alloy containing the silver flows to the bottom of the cupellation furnace. The process for recovering the plumbum and the silver from the waste slag of metal smelting fully utilizes secondary mineral resources, reduces the waste of resources, improves the comprehensive recovery capacity of valuable metal, and ensures environment protection.

Description

technical field [0001] The invention relates to a process for recovering lead and silver, in particular to a process for recovering lead and silver from waste slag in metal smelting. Background technique [0002] In the existing electrolysis process, anode plates are used to carry out zinc electrolysis, and the raw materials of the alloy anode plates are lead ingots, silver ingots, silver, etc., and a large amount of lead and silver scum will be produced in the production process, and there is no good lead and silver at present. Scum recovery process. Moreover, with the development of industrial production, the amount of metal waste slag continues to increase. These waste slags are mainly composed of lead, zinc, and silver, and contain a small amount of impurities such as copper, bismuth, and antimony. In order to reuse resources, it is necessary to make full use of the company's Secondary mineral resources can improve the recovery rate of valuable metals in enterprises, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/18C25C1/20C22B7/04C22B11/00C22B13/02
CPCY02P10/20
Inventor 陈庚仁
Owner 永兴县庚仁银业有限责任公司
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