Method for recovering tin, antimony and lead and enriching indium from tin residue

A technology for tin, antimony, lead and tin slag is applied in the field of recovering tin, antimony and lead from tin slag and enriching indium. Good environmental benefits and convenient wet extraction of indium

Inactive Publication Date: 2010-03-03
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Before this, there has been no good way to comprehensively recover tin and indium from the slag, so the slag has to be piled up or returned to the blast furnace or r...

Method used

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  • Method for recovering tin, antimony and lead and enriching indium from tin residue
  • Method for recovering tin, antimony and lead and enriching indium from tin residue
  • Method for recovering tin, antimony and lead and enriching indium from tin residue

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Embodiment Construction

[0034] According to the process figure 1 The method steps and technical parameters of the technical solution of the present invention are further described.

[0035] 1. Potential-controlled two-stage countercurrent reduction and leaching of antimony

[0036] The conditions for the leaching of antimony are:

[0037] (1) Slurry of tin slag:

[0038] Tin slag particle size: 0.075~0.125mm

[0039] Slurry agent: water

[0040] Liquid-solid ratio: 0.5:1

[0041] Slurry time: 0.5-2 hours

[0042] (2) One stage leaching

[0043] The leaching conditions of the first-stage leaching of tin slag after pulping are as follows:

[0044] The composition and concentration of the leaching agent: the second-stage leaching solution is adjusted to a hydrochloric acid content of 200-300g / L, the addition of sodium chloride is 1-20wt% of the tin slag, and the addition of hydrazine hydrate is preferably adjusted to a leaching potential of 250-350mv.

[0045] Liquid-solid ratio: 4~6:1

[0046]...

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Abstract

The invention relates to a method for recovering tin, antimony and lead and enriching indium from tin residue, which comprises the following steps: tin residue powder containing tin, antimony, lead, indium and arsenic oxide uses mixed liquor of hydrochloric acid, sodium chloride and hydrazine hydrate as a leaching agent, carries out electric potential control and two step countercurrent to recoverleached antimony, one-step leaching agent is neutralized and hydrolyzed to output crude antimony oxide, lead can be leached by sodium chloride solution in two-step leaching residue; after lead is leached, the liquor is cooled and crystallized to obtain lead chloride; after lead is leached, sodium is washed out in residue to obtain high indium tin concentrate containing 49.52-55.69wt% of tin and 1.04-1.2wt% of indium. The purities of crude antimony oxide and crude lead chloride are respectively 93.58wt% and 99.67wt%; the recovery efficiencies of tin, antimony, lead and indium respectively reach up to 98.68wt%, 84.616wt%, 95.136wt%, and 95.3wt%. The method has the advantages of short flow, good separation effect and good working conditions.

Description

1. Technical field [0001] The invention relates to a hydrometallurgical process in the field of metallurgy, in particular to a method for recovering tin, antimony, lead and enriching indium from tin slag. 2. Background technology [0002] In the crude alloy blowing process of the pyrometallurgical smelting process of brittle sulfur-lead-antimony ore, a kind of tin-removing blowing slag is produced, which is called tin slag. ~40wt%, 10~30wt%, 0.1~0.3wt%, 1~3wt%. Before this, there has been no good way to comprehensively recover tin and indium from the slag, so the slag has to be piled up or returned to the blast furnace or reverberatory furnace for treatment, which reduces the direct yield of lead and antimony and increases the production cost, and at the same time loses tin, Indium resources. 3. Contents of the invention [0003] The purpose of the present invention is to provide a method for recovering tin, antimony, lead and enriching indium from tin slag, which can re...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B3/04C22B3/12C22B3/10C22B25/06C22B30/02C22B13/00C22B58/00
CPCY02P10/20
Inventor 李仕雄韦元基廖春图陈进中刘爱心邓崇进韩煜生杜彩平张月婷
Owner CENT SOUTH UNIV
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