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Method for recycling valuable metals from zinc-containing tin materials

A technology for valuable metals and materials, applied in the field of recycling valuable non-ferrous metals, can solve problems such as high cost, low feasibility, and complicated process, and achieve the effect of less equipment, strong adaptability, and less three wastes

Inactive Publication Date: 2019-02-15
贵州省兴安环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, many scholars have carried out research on these materials and proposed some smelting processes, but most of these smelting processes have the disadvantages of complicated process, high cost and low feasibility

Method used

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  • Method for recycling valuable metals from zinc-containing tin materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The zinc-tin-containing waste slag of a certain enterprise is fumigated and dust-collected by fuming treatment in a fuming furnace. Its main components are Zn5%-10%, Sn15%-25%, Pb10%-15%, Fe3%-10%, and at the same time It also contains a small amount of As, In, Ni, Co.

[0026] Comprehensive recovery and smelting of smoke dust collection, the steps are as follows:

[0027] (1) Mix the reduced coal and fume dust collection at a mass ratio of 0.25, put them into a rotary kiln for redox volatilization at 1250°C, and obtain bag dust collection powder and glass body slag; among them, bag dust collection powder is mainly Contains 35%-40% Zn, 25%-26% Pb, 0.5% Sn, 0.3% As, 0.5% Sb, 0.03% In, the vitreous slag mainly contains 30%-35% Sn, 12%-15% Fe , 1.5%-2%Pb, 20%-30%SiO 2 , 10%-15% coal;

[0028] (2) Leach the bag dust collection powder with a mixture of 100g / L sulfuric acid and 10% hydrogen peroxide at a liquid-solid ratio of 5 and a temperature of 80-90°C for 2 hours, and...

Embodiment 2

[0035] A hydrometallurgy enterprise produced leaching slag containing 1%-2% Sn, 6%-8% Zn, 25%-30% Pb, and 0.8%-1.5% Sn, 10%-15% Zn, 10 %-20% Fe neutralization oxidation iron removal slag, mix leaching residue and neutralization oxidation iron removal slag to obtain material containing 1.8% Sn, 10.5% Zn, 16.5% Pb, 11.2% Fe.

[0036] Comprehensive recovery and smelting of materials, the steps are as follows:

[0037](1) Carry out smoke volatilization enrichment to material with fuming furnace, obtain the volatile soot containing 8.3% Sn, 20.3% Zn, 25.8% Pb, 15.5% Fe; Mix reduced coal and volatile soot by the mass ratio of 0.3, Throw it into a rotary kiln for redox volatilization at 1300°C to obtain zinc oxide dust containing 45.2% Zn, 0.25% Sn, 33.1% Pb and dust containing 10.3% Sn, 2.5% Pb, 18.5% Fe, 0.75% Zn Kiln residue;

[0038] (2) Zinc oxide dust is leached for 3 hours with 80g / L sulfuric acid and manganese dioxide at a liquid-solid ratio of 4 and a temperature of 90-95°...

Embodiment 3

[0045] The tin-rich slag produced by an enterprise contains 4.7% Sn, 3.26% Pb, and 1.2% Zn. It is obtained through fuming furnace treatment. Its chemical composition is: bag dust contains 17%-31.8% Sn, 11.8%-36.4% Zn , 9%-12%Pb; surface cooling powder contains 10%-29%Sn, 16%-22%Zn, 12%-16%Pb; cyclone dust removal powder contains 6%-19%Sn, 12%-20%Zn , 16%-19% Pb.

[0046] Comprehensive recovery and smelting of each fume dust collection, the steps are as follows:

[0047] (1) Mix the reduced coal powder with each fume dust collector at a mass ratio of 0.25, put it into a rotary kiln and carry out redox roasting at 1250° C. to obtain a mixture containing 40%-45% Zn, 0.3%-0.6% Sn, Rotary kiln with 18%-25% Pb reduces volatile dust and kiln slag containing 30%-35% Sn, 0.5%-1% Zn, 2%-3% Pb, 5%-8% Fe;

[0048] (2) leaching the rotary kiln reducing volatile dust with a mixed solution of sulfuric acid containing 100g / L and 10% hydrogen peroxide at a liquid-solid ratio of 5 and a tempe...

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Abstract

The invention belongs to the field of metal smelting, and particularly relates to a method for recycling valuable metals from zinc-containing tin materials. The method comprises the following steps that 1, the zinc-containing tin materials and reducing raw coal are mixed and added into a rotary kiln for roasting to obtain smoke dust and kiln slag; 2, the smoke dust is oxidized and leached with sulfuric acid and an oxidizing agent to obtain leachate and leached residues; 3, the leachate is carried out purification and impurity removal after the leachate is subjected to extraction to recycle indium and germanium, then the leachate is electrolyzed to obtain metal zinc, and the leached residues are returned to the rotary kiln or a fuming furnace for treatment; 4, the kiln slag is subjected toball milling and then is mixed with coke to be added into a reduction furnace to be smelted to obtain metal crude tin and reduced furnace slag; and 5, vacuum smelting is carried out on the crude tin to obtain fine tin and metal lead, flotation and magnetic separation are carried out on the reduced furnace slag, and the magnetic separation tailings can be used as raw materials for cement production. According to the method, metals such as lead, zinc and tin can be efficiently separated and recycled, fewer three wastes are generated, the cost is low, the technological process is short, the device is simple, the adaptability is high, and popularization and application are easy to carry out.

Description

technical field [0001] The invention belongs to the field of metal smelting, in particular to a method for recovering valuable nonferrous metals from materials containing zinc and tin. Background technique [0002] Lead-zinc mines in Southwest China and neighboring countries all contain rare metal components to varying degrees. After smelting lead-zinc, the waste slag discharged by enterprises is mainly acid leaching slag, which generally contains lead, zinc, tin, iron and other components, and other Most of the content is higher than 2%, and the highest can reach about 10%, which has a great recovery value. In addition, the smelting slag of metal tin and lead also contains relatively high tin components and a certain amount of lead and zinc components, which can also be separated and recovered through further smelting. Moreover, the direct discharge of these materials into the environment will cause heavy metal pollution and affect the living environment of animals and pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/02C22B7/02C22B3/08C25C1/16C22B58/00C22B41/00C22B25/02C22B25/06
CPCC22B1/02C22B3/08C22B7/00C22B7/02C22B25/02C22B25/06C22B41/00C22B58/00C25C1/16Y02P10/20
Inventor 李世平王志斌韦国龙卢宇张华杨光
Owner 贵州省兴安环保科技有限公司
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