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Direct acidity oxygen pressure leaching treatment method of crude tin copper removal residues

A technology of oxygen pressure leaching and treatment method, which is applied in the field of direct acid oxygen pressure leaching treatment of crude tin copper removal slag, which can solve the problems of metal loss, long process flow and high production cost, and achieve rapid separation, short process flow and direct recovery high rate effect

Inactive Publication Date: 2013-01-16
LAIBIN CHINA TIN SMELTING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process has the advantages of high copper recovery rate, fast recovery of tin, and no external discharge of waste residue and wastewater; its disadvantages are: ①The electrolysis process is labor-intensive, all materials need to be manually packed into plastic composite bags, and electrolysis of anode slime requires manual labor. Collected from plastic composite bags, ②The direct recovery rate of tin in the electrolysis process is low, generally only 40-50%; ③The anode slime entrains fluorosilicic acid electrolytic solution, which will seriously corrode the dust collection bag during subsequent roasting and reduction smelting, Cause metal loss, ④ long process flow, large power consumption, high production cost

Method used

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  • Direct acidity oxygen pressure leaching treatment method of crude tin copper removal residues

Examples

Experimental program
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Effect test

no. 1 example

[0019] Present embodiment is the first example of the processing method of thick tin copper slag of the present invention, comprises the steps:

[0020] (1) Acidic oxygen pressure leaching: add 3 tons of crude tin decopper slag containing 55% tin and 18% copper, add 15 cubic meters of leaching solution with an initial acidity of 100 g / l, at a temperature of 120°C and an oxygen partial pressure Under the condition of 0.15MPa, it was leached in a 20 cubic meter autoclave for 6 hours; The filtrate is 14 cubic meters, and the output is 3.5 tons of filter residue with a water content of 32%, a tin content of 70.3%, and a copper content of 2.5%. The direct recovery rate of copper is 88.1%, and the direct recovery rate of tin is 99.7%.

[0021] (2) Reduction smelting of filter residues: Mix 3.5 tons of filter residues with 0.5 tons of reduced coal, carry out reduction smelting at a temperature of 1250°C for 6 hours, and produce 1.51 tons of crude tin containing 92.6% tin and 3.4% cop...

no. 2 example

[0024] Present embodiment is the second example of the processing method of thick tin copper slag of the present invention, comprises the steps:

[0025] (1) Acidic oxygen pressure leaching: Add 3 tons of crude tin decopper slag containing 65% tin and 13% copper, add 15 cubic meters of leaching solution with an initial acidity of 150 g / l, at a temperature of 135°C and an oxygen partial pressure Under the condition of 0.20MPa, it was leached in a 20 cubic meter autoclave for 5 hours; The filtrate is 13.8 cubic meters, and the output is 3.8 tons of filter residue containing 31% water, 74.3% tin, and 1.7% copper; the direct recovery rate of copper is 88.4%, and the direct recovery rate of tin is 99.8%.

[0026] (2) Reduction smelting of filter residues: Mix 3.8 tons of filter residues with 0.5 tons of reduced coal, carry out reduction smelting at a temperature of 1260°C for 6 hours, and produce 1.82 tons of crude tin containing 93.4% tin and 2.3% copper.

[0027] (3) Filtrate co...

no. 3 example

[0029] Present embodiment is the 3rd example of the processing method of thick tin copper slag removal described in the present invention, comprises the steps:

[0030] (1) Acidic oxygen pressure leaching: add 4 tons of crude tin decopper slag containing 75% tin and 8% copper, and add 16 cubic meters of leaching solution with an initial acidity of 150 g / L. Under the condition of 0.25MPa, it was leached in a 20 cubic meter autoclave for 4 hours; after the leaching, it was filtered, and the final acid of the output was 118 grams per liter, containing 20 grams per liter of copper and 0.72 grams per liter of tin. The filtrate is 14.4 cubic meters, and the output is 5.2 tons of filter residue containing 30% water, 82.1% tin, and 0.88% copper; the direct recovery rate of copper is 90.0%, and the direct recovery rate of tin is 99.6%.

[0031] (2) Reduction smelting of filter residue: Mix 5.2 tons of filter residue with 0.7 tons of reduced coal, carry out reduction smelting at a tempe...

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Abstract

Disclosed is a direct acidity oxygen pressure leaching treatment method of crude tin copper removal residues. The method includes that the crude tin copper removal residues containing 55-75% of tin and 8-18% of copper produced when liquid-state crude tin is added to sulphur to remove copper are leached for 4-6 hours and filtered to obtain a filtrate and residues with final acid of 46-118g / L under the conditions that the temperature is 120-150 DEG C, oxygen partial pressure is 0.15-0.25MPa and the initial acid is 100-250g / L, the residues are subjected to reduction smelting to produce crude tin, the filtrate is subjected to concentration, cooling and crystallization to produce a copper sulfate pentahydrate product or subjected to electrolysis to produce electrolytic copper, and a crystallization mother liquor or an electrolyzed solution is returned to a leaching process for dispensing liquids. By means of the direct acidity oxygen pressure leaching treatment method of the crude tin copper removal residues, tin and copper in the crude tin copper removal residues can be rapidly and efficiently separated, and waste water, waste gases and waste residues are not generated.

Description

technical field [0001] The invention relates to the field of nonferrous metal smelting, in particular to a method for direct acidic oxygen pressure leaching of crude tin and copper removal slag. Background technique [0002] After the tin concentrate is boiled and roasted to remove most of the sulfur and arsenic, the tin calcine is produced; the tin calcine is mixed with an appropriate proportion of reduced coal, and the reduction smelting is carried out in a reverberatory furnace, an electric furnace or an Ausmelt furnace to produce Out of crude tin. In the reduction smelting process, the copper in the tin calcine is reduced to metallic copper and dissolved in the liquid crude tin in the reverberatory furnace, electric furnace or Ausmelt furnace; during the refining process of the liquid crude tin, sulfur is added to remove Copper, the slag containing 50-75% tin and 8-20% copper produced during copper removal, that is, crude tin copper removal slag, also known as sulfur sl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B25/06
CPCY02P10/20
Inventor 陶政修蒋光佑王学洪陈光耀罗祥海潘久华韦晓岚刘瑞年
Owner LAIBIN CHINA TIN SMELTING
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