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Method for comprehensively recovering valuable metals from arsenic-containing copper smoke dust

A technology for valuable metals and dust, applied in the direction of arsenic compounds, chemical instruments and methods, arsenic oxide/arsenic hydroxide/oxyacid arsenic, etc., can solve the problems of long production process and difficulty in comprehensive utilization, and achieve short process, The effect of high direct yield

Inactive Publication Date: 2019-08-06
TONGREN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the fire-wet combined treatment method is that the production process is long, and the arsenic is removed in the form of arsenic-calcium slag, which is difficult to comprehensively utilize

Method used

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  • Method for comprehensively recovering valuable metals from arsenic-containing copper smoke dust

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] refer to figure 1 , a method for comprehensively recovering valuable metals from arsenic-containing copper fume, comprising the following steps:

[0025] A. Low temperature roasting: the ingredients are: arsenic: 9%-13%, copper 2-3%, zinc 12%-14%, indium 500-1000g / t, tin 3%-5%, lead 10%-13% The arsenic-containing copper soot is roasted at low temperature in a rotary kiln, and the temperature during low-temperature roasting is 300-370°C, and 3% of the total mass of the arsenic-copper soot and 3% of the total mass of the arsenic-copper soot are added. Copper oxide powder , the roasting time lasts for 2 hours; smoke dust and roasting slag are obtained during roasting, wherein the content of arsenic in the roasting slag is reduced to below 1%, and the smoke dust is arsenic trioxide, and the dust is further dust-collected to obtain high-grade arsenic trioxide;

[0026] B, atmospheric acid leaching: the roasted slag obtained in step A is leached by sulfuric acid with a conce...

Embodiment 2

[0032] refer to figure 1 , a method for comprehensively recovering valuable metals from arsenic-containing copper fume, comprising the following steps:

[0033] A. Low temperature roasting: the ingredients are: arsenic: 13%-17%, copper 3-5%, zinc 14%-17%, indium 1000-1500g / t, tin 5%-7%, lead 13%-17% The arsenic-containing copper soot is roasted at low temperature in a rotary kiln, and the temperature during low-temperature roasting is 370-450°C, and 4% of the total mass of the arsenic-copper soot and 7% of the total mass of the arsenic-copper soot are added. Copper oxide powder , the roasting time lasts for 2.5 hours; smoke dust and roasting slag are obtained during roasting, wherein the content of arsenic in the roasting slag is reduced to below 1%, and the smoke dust is arsenic trioxide, and the dust is further dust-collected to obtain high-grade arsenic trioxide;

[0034] B, atmospheric acid leaching: the roasted slag obtained in step A is leached by sulfuric acid with a c...

Embodiment 3

[0040] refer to figure 1 , a method for comprehensively recovering valuable metals from arsenic-containing copper fume, comprising the following steps:

[0041] A. Low temperature roasting: the ingredients are: arsenic: 17%-20%, copper 5%-6%, zinc 17%-20%, indium 1500-2000g / t, tin 7%-8%, lead 17%-20 % of the arsenic-containing copper dust is roasted at a low temperature in a rotary kiln, and the temperature during low-temperature roasting is 450-500°C, and 5% of the total mass of the arsenic-copper fume and 10% of the total mass of the arsenic-copper fume are added. Copper oxide powder, and the roasting time lasts for 3 hours; smoke and roasted slag are obtained during roasting, wherein the content of arsenic in the roasted slag is reduced to below 1%, and the smoke is arsenic trioxide, and the dust is further dust-collected to obtain high-grade diarsenic trioxide;

[0042] B, atmospheric acid leaching: the roasted slag obtained in step A is leached by sulfuric acid with a conc...

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Abstract

The invention discloses a method for comprehensively recovering valuable metals from arsenic-containing copper smoke dust. The method comprises the following steps that low-temperature roasting is carried out, wherein low-temperature roasting is carried out on the arsenic-containing copper smoke dust in a rotary kiln, smoke dust and roasting slag are obtained during roasting, wherein the smoke dust is arsenic trioxide, and then dust collecting treatment is further carried out on the smoke dust to obtain the high-grade arsenic trioxide; normal pressure acid leaching is carried out, specially leaching is carried out on the obtained roasting slag by adopting sulfuric acid with the concentration of 150-200 g / L, and a copper-containing leaching solution and primary leaching slag are obtained atthe moment; replacement is carried out on the copper-containing leaching solution; oxygen-pressure acid leaching is carried out on the primary leaching slag, and specifically the primary leaching slag is treated by adopting an oxygen-pressure acid leaching method to obtain an indium-containing leaching solution and lead-and-tin-containing slag; replacement is carried out on the indium-containingleaching solution; electrodeposition treatment is carried out on a zinc sulfate solution; and electrodeposition treatment is carried out on the obtained zinc sulfate solution to obtain electrodeposition zinc. In the application process, the method has the advantages that the direct yield of the valuable metal is high, the process is short, arsenic-calcium slag is not generated, and the applicationis facilitated.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of metallurgical waste, in particular to a method for comprehensively recovering valuable metals from arsenic-containing copper dust. Background technique [0002] During the copper fire smelting process, a large amount of arsenic in the concentrate volatilizes into the fume, forming arsenic-containing copper fume. The composition of arsenic-containing copper dust is complex. On the one hand, it contains valuable metals such as copper, lead, zinc, tin, indium, etc., which is of great recycling value; on the other hand, it contains high arsenic content, which has great potential harm to the environment. The process is complex. The efficient separation and harmless treatment of arsenic and other components in the soot, and the appropriate valuable metal extraction technology is copper fume, which is the key point and difficulty in the treatment of high-arsenic copper fume. [000...

Claims

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Application Information

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IPC IPC(8): C22B7/02C22B1/02C01G28/00C22B15/00C22B58/00C22B19/20C22B19/30C22B13/00C22B25/06C25C1/16
CPCC01G28/005C22B1/02C22B7/007C22B7/02C22B13/045C22B15/0071C22B15/0091C22B19/22C22B19/30C22B25/04C22B25/06C22B58/00C25C1/16Y02P10/20
Inventor 李学鹏王娟
Owner TONGREN UNIV
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