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Method for recovering valuable metal from waste residue containing lead and zinc through wet-fire combination process

A combined process and valuable metal technology, applied in the field of metal smelting, can solve the problems of high impurity content, high processing cost, low recovery rate, etc., and achieve the effect of high recovery rate, avoiding pollution, high yield and product taste

Inactive Publication Date: 2012-11-14
四川正祥环保技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the traditional lead-zinc waste residues are treated by pyro-refining process, but after treatment, the impurity content is high, the recovery rate is low, and the processing cost is high; The treatment process with short process and good economic benefits has practical significance

Method used

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  • Method for recovering valuable metal from waste residue containing lead and zinc through wet-fire combination process

Examples

Experimental program
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Effect test

Embodiment 1

[0052] a. Take zinc-lead waste residue from an electrolytic zinc enterprise in Shimian County (main content: 20-30% lead, 6-8% zinc, 25-28% water, 0.5-1.5% copper, 0.02-0.06% indium and tin 0.03-0.08%) 200kg, then mixed with 14% water, 7% coal powder, 2% silica, 5% limestone and 25% iron powder, and the bulk material was crushed by the crusher until the particle size was less than 1cm, the crushed material is ground by a pulverizer, and the particle size of 90% of the mixed material is controlled to be below -100 mesh to obtain a powder; then it is added to a disc pelletizer for pelletizing to obtain pellets; The ore is put into the sintering machine and sintered at 600-650°C for 5 hours to obtain a sintered block; the prepared sintered block is mixed with 10% coke, mixed with a mixer, and then melted in a blast furnace to obtain metal lead, ice Copper phase, soot phase and water slag; the technological conditions of the smelting process are controlled as follows: the blast fu...

Embodiment 2

[0060] a. Take zinc-lead waste residue from an electrolytic zinc enterprise in Shimian County (main content: 20-30% lead, 6-8% zinc, 25-28% water, 0.5-1.5% copper, 0.02-0.06% indium and tin 0.03-0.08%) 300kg, then mixed with 16% water, 8% coal powder, 3% silica, 7% limestone and 27% iron powder, the bulk material is crushed by the crusher until the particle size is less than 2cm, the crushed material is ground by a pulverizer, and the particle size of 90% of the mixed material is controlled to be below -100 mesh to obtain a powder; then it is added to a disc pelletizer for pelletizing to obtain pellets; Put the ore into the sintering machine and sinter at 600-650°C for 6 hours to obtain a sintered block; add 15% coke to the obtained sintered block, mix it with a mixer, and then enter the blast furnace for smelting to obtain metal lead, ice Copper phase, soot phase and water slag; the technological conditions of the smelting process are controlled as follows: the blast furnace ...

Embodiment 3

[0068] a. Take zinc-lead waste residue from an electrolytic zinc enterprise in Shimian County (main content: 20-30% lead, 6-8% zinc, 25-28% water, 0.5-1.5% copper, 0.02-0.06% indium and tin 0.03-0.08%) 400kg, then mixed with 15% water, 7.5% coal powder, 2.5% silica, 6% limestone and 26% iron powder, and the bulk material was crushed by the crusher until the particle size was less than 2cm, the crushed material is ground by a pulverizer, and the particle size of 90% of the mixed material is controlled to be below -100 mesh to obtain a powder; then it is added to a disc pelletizer for pelletizing to obtain pellets; Put the ore into the sintering machine and sinter at 600-650°C for 5.5 hours to obtain a sintered block; add 13% coke to the obtained sintered block, mix it with a mixer, and then enter the blast furnace for smelting to obtain metal lead, ice Copper phase, soot phase and water slag; the technological conditions of the smelting process are controlled as follows: the bl...

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Abstract

The invention discloses a method for recovering valuable metal from waste residue containing lead and zinc through a wet-fire combination process. The method is characterized by comprising the steps of preparation of simple-substance lead, leaching of zinc hypoxide, preparation of simple-substance copper, indium and tin, preparation of zinc and the like. By utilizing the wet-fire combination process to recover the metal, the recovery rate of the lead and the zinc is high, the leaching separation effect of the copper, the indium and the tin is good, and the waste residue is utilized cyclically. The existing resources are further recovered, and pollution of the valuable metal to the environment is avoided, so that the method is safe and environment-friendly. Besides, the method is simple in principle, reasonable in flow path, high in yield and product quality and low in cost.

Description

technical field [0001] The invention belongs to the field of metal smelting, and in particular relates to a method for recovering valuable metals in waste slag containing lead and zinc by a combined wet method and pyrotechnic process. Background technique [0002] At present, the production of non-ferrous metals, especially the production of lead and zinc, is mainly concentrated in several large and medium-sized electrolysis plants and smelters in China, and the raw materials are lead and zinc concentrates. Due to the non-renewability of resources, the reserves of lead and zinc concentrates are decreasing day by day, thus restricting the increase and demand of lead and zinc production. But on the other hand, some large and medium-sized electrolysis and smelting plants have produced a large amount of non-ferrous metal waste slag, which contains lead and zinc waste slag in different forms. If the material is not used effectively, it will cause a great waste of resources. In ...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B13/00C22B15/00C22B19/00C22B25/00
CPCY02P10/20
Inventor 陈元超
Owner 四川正祥环保技术有限公司
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