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Method for treating indium-containing high-arsenic soot in wet method

A technology of wet treatment and high-arsenic soot, which is applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of high energy consumption of arsenic open circuit, high production cost, and serious smoke emission, so as to avoid potential safety hazards , Reduce production costs, low processing costs

Inactive Publication Date: 2018-12-14
CHENZHOU FENGYUE ENVIRONMENTAL PROTECTION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of fire treatment can improve the leaching rate of soot indium, and the recovery rate of indium can reach more than 95%, but the disadvantage is that the smoke is scattered seriously, and the working environment of workers is poor, which is not conducive to actual production.
For example, Patent No. 201610998354.9 uses one-stage hydrothermal and two-stage alkaline leaching methods to pre-remove arsenic, and the two-stage leachate is cooled and crystallized separately to obtain arsenic-containing crystals. The total removal rate of arsenic in the whole process is above 98%, but this method arsenic The open circuit energy consumption is too large, which directly leads to high production costs
For example, patent number 00113307.1 uses Na 2 S and NaOH sulfur leaching arsenic soot to obtain sulfur leaching slag and sulfur leaching solution. The arsenic removal effect is good, but it will reduce the leaching rate of valuable metals such as indium. For example, the patent No. 201510343205.4 proposes to configure a 30%-60% sodium hydroxide solution. The arsenic removal by leaching, the arsenic removal rate reaches over 70%, but the cost of alkaline leaching in this method is high, which is not conducive to actual production

Method used

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  • Method for treating indium-containing high-arsenic soot in wet method
  • Method for treating indium-containing high-arsenic soot in wet method
  • Method for treating indium-containing high-arsenic soot in wet method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Take 400kg of indium-containing high-arsenic soot (As: 13.84%, indium: 4562g / t, Sb: 6.28%, Pb: 28.16%, Zn: 30.71%) and pour it into 5m 3 In the reaction tank, add river water 0.8m 3 , 100kg of caustic soda, heat the reaction tank with steam to 70°C and stir the reaction, take 80L of hydrogen peroxide and gradually add it to the solution, the addition time is controlled to 2h, after the reaction time is 2h, continue to add river water to 2.0m 3 , the reaction temperature is 90°C, the reaction time is 2h, and the total reaction time is 4h. After the reaction, liquid-solid separation is carried out, the liquid is subjected to arsenic precipitation treatment, and the residue is subjected to acid leaching. Add 1.6m leaching residue 3 The zinc electrolysis waste liquid is leached with acid once, the reaction temperature is 80°C, the reaction time is 2h, the acidity is controlled by adding concentrated sulfuric acid to control the end point acidity to 100g / L, and 1.6m 3 The...

Embodiment 2

[0032] Take 400kg of indium-containing high-arsenic soot (As: 18.52%, indium: 10246g / t, Sb: 7.65%, Pb: 26.32%, Zn: 35.16%) and pour it into 5m 3 In the reaction tank, add river water 0.8m 3 , 100kg of caustic soda, heat the reaction tank with steam to 75°C and stir the reaction, take 80L hydrogen peroxide and gradually add it to the solution, the addition time is controlled to 2h, after the reaction time is 2h, continue to add river water to 2.4m 3 , the reaction temperature is 90°C, the reaction time is 2h, and the total reaction time is 4h. After the reaction, liquid-solid separation is carried out, the liquid is subjected to arsenic precipitation treatment, and the residue is subjected to acid leaching. Add 2.0m of leaching residue 3 The zinc electrolysis waste liquid is leached with acid once, the reaction temperature is 85°C, the reaction time is 2h, the acidity is controlled by adding concentrated sulfuric acid to control the end point acidity to 110g / L, and 2m 3The z...

Embodiment 3

[0039] Take 400kg of high arsenic soot (As: 22.05%, Indium: 6850g / t, Sb: 5.27%, Pb: 30.42%, Zn: 38.57%) and pour it into 5m 3 In the reaction tank, add river water 0.8m 3 , 120kg of caustic soda, heat the reaction tank with steam to 70°C and stir the reaction, take 80L of hydrogen peroxide and gradually add it to the solution, the addition time is controlled to 2h, after the reaction time is 2h, continue to add river water to 2.4m 3 , the reaction temperature is 90°C, the reaction time is 2h, and the total reaction time is 4h. After the reaction, liquid-solid separation is carried out, the liquid is subjected to arsenic precipitation treatment, and the residue is subjected to acid leaching. Add 2m of leaching residue 3 The zinc electrolysis waste liquid is leached with acid once, the reaction temperature is 80°C, the reaction time is 2h, the acidity is controlled by adding concentrated sulfuric acid to control the end-point acidity to 100g / L, and 2m 3 The zinc electrolysis ...

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Abstract

The invention belongs to the technical field of metal recycling and discloses a method for treating indium-containing high-arsenic soot in a wet method. The method includes the steps that the indium-containing high-arsenic soot is subjected to alkaline leaching, and leachate containing arsenate and leaching residues containing valuable metal such as antimony, lead, zinc and silver are obtained; calcium oxide is subjected to arsenic precipitation and arsenic precipitation post-liquid and calcium arsenate are obtained; the leaching residues are sequentially subjected to acid first-time leachingand acid second-time leaching through zinc electrolysis waste liquid, the indium leaching rate is 90% or above, acid first leaching liquid is subjected to P204 extraction, an organic phase and extraction raffinate are obtained, the organic phase is subjected to hydrochloric acid reverse extraction, caustic soda flake neutralization, zinc sheet replacement and fusion casting, indium ingots with purity being 99% or above are obtained, the extraction raffinate enters an electrolytic zinc system to recycle zinc, acid second leaching residues are subjected to lead pyrogenic process smelting, and valuable metal such as lead, antimony and silver in the residues is systematically recycled. The method is simple in procedure, separation of valuable metal such as arsenic and indium is achieved, and the valuable metal of indium and the like is effectively recycled.

Description

technical field [0001] The invention belongs to the technical field of metal recovery, relates to arsenic treatment and comprehensive recovery of indium, zinc, lead, antimony and other valuable metals, and in particular to a method for wet treatment of indium-containing high-arsenic soot. technical background [0002] Arsenic is a non-metallic element widely distributed in nature. The content in the earth's crust is about 2-5 mg / kg, and it is the 20th element that constitutes the earth's crust. The boiling points of arsenic and its compounds are relatively low, so arsenic will be enriched in soot during the smelting process of non-ferrous metals. Indium-containing high-arsenic soot is an intermediate product of the pyrometallurgy system, which contains high arsenic and valuable metals such as indium, lead, zinc, antimony, silver, etc., because the treatment of arsenic is difficult at present, so this kind of material is also an industry Intermediate materials that are more ...

Claims

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Application Information

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IPC IPC(8): C22B7/02C22B3/38C22B19/20C22B19/30C22B19/32C25C1/16C22B13/02C22B13/00C22B30/02C22B11/00C22B11/02C22B58/00
CPCC22B7/006C22B7/007C22B7/008C22B7/02C22B11/023C22B11/044C22B13/025C22B13/045C22B19/22C22B19/24C22B19/30C22B19/32C22B30/02C22B58/00C25C1/16C22B3/3846Y02P10/20
Inventor 段良洪刘伟王敏杰高海明曹家毓曹文法
Owner CHENZHOU FENGYUE ENVIRONMENTAL PROTECTION TECH
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