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Copper smelting smoke dust arsenic removal method

A technology for copper smelting and soot, applied in the field of non-ferrous metal pyrometallurgy, can solve the problems of hidden safety hazards, high cost, low energy consumption, etc., and achieve the effects of no secondary pollution, flexible operation and low energy consumption

Active Publication Date: 2019-02-12
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the disadvantages of high pollution, high energy consumption, high cost, and potential safety hazards in the prior art for the removal of arsenic from complex arsenic-containing materials, the purpose of the present invention is to provide a method that uses pyrite as an arsenic removal additive, which can Method for realizing efficient removal of arsenic from copper smelting dust
The method is simple in process and low in energy consumption, and can effectively solve the technical problem of arsenic removal in copper smelting dust containing arsenic, and meet the needs of industrial production and application

Method used

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  • Copper smelting smoke dust arsenic removal method
  • Copper smelting smoke dust arsenic removal method
  • Copper smelting smoke dust arsenic removal method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0027] In this example, a copper smelting plant in Hunan Province is selected for smelting electric dust collection. Its main element composition is shown in Table 1, and the additive is pyrite. The specific implementation steps are as follows:

[0028] Table 1 Composition of main elements of electric dust collection in a copper smelting plant in Hunan Province (%)

[0029]

[0030] Step 1: Take copper smelting electric dust collector and pyrite respectively, dry at low temperature, crush until the particle size is less than 2mm, and mix the copper smelting dust and pyrite evenly according to the pyrite addition amount of 30%, to obtain a mixed material.

[0031] Step 2: Weigh 5g of the above-mentioned mixture into the ark crucible, place the ark crucible in a tube furnace for roasting, set the roasting temperature to 700°C, set the roasting time to 60min, and set the heating rate to 20°C / min. The sample was digested and sent to an inductively coupled plasma optical emissi...

Embodiment 2

[0034] In this example, a copper smelting plant in Hunan Province is selected for smelting electric dust collection. Its main element composition is shown in Table 2, and the additive is pyrite. The specific implementation steps are as follows:

[0035] Table 2 Composition of main elements of electric dust collection in a copper smelting plant in Hunan Province (%)

[0036]

[0037] Step 1: Take copper smelting electric dust collector and pyrite respectively, dry at low temperature, crush until the particle size is less than 2mm, and mix the copper smelting dust and pyrite evenly according to the pyrite addition amount of 30%, to obtain a mixed material.

[0038] Step 2: Weigh 5g of the above-mentioned mixture into the ark crucible, place the ark crucible in a tube furnace for roasting, set the roasting temperature to 700°C, set the roasting time to 5min, and set the heating rate to 20°C / min. It was digested and sent to an inductively coupled plasma optical emission spectr...

Embodiment 3

[0041] In this example, a copper smelting plant in Hunan Province is selected for smelting electric dust collection. Its main element composition is shown in Table 3, and the additive is pyrite. The specific implementation steps are as follows:

[0042] Table 3 Composition of main elements of electric dust collection in a copper smelting plant in Hunan Province (%)

[0043]

[0044]Step 1: Take copper smelting electric dust collector and pyrite respectively, dry at low temperature, crush until the particle size is less than 2mm, and mix the copper smelting dust and pyrite evenly according to the pyrite addition amount of 30%, to obtain a mixed material.

[0045] Step 2: Weigh 5g of the above-mentioned mixed materials into the ark crucible, place the ark crucible in a tube furnace for roasting, set the roasting temperature to 400°C, set the roasting time to 60min, and set the heating rate to 20°C / min, and put the roasted The sample was digested and sent to an inductively co...

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Abstract

The invention discloses a copper smelting smoke dust arsenic removal method. According to the method, copper smelting arsenious smoke dust and a material containing iron sulfide are mixed and then roasted in a protective atmosphere to remove arsenic in the copper smelting arsenious smoke dust in an arsenious oxide form. Compared with a conventional fire arsenic removal method, the method has the advantages that arsenic can be efficiently removed under a low roasting temperature, and the arsenic removal rate can reach up to 88% or above; moreover, operation is easy, the conditions are mild, energy consumption is low, and arsenic in the copper smelting smoke dust can be removed on a large scale.

Description

technical field [0001] The invention relates to a method for removing arsenic from copper smelting smoke and dust, which uses pyrite as an arsenic removal additive to improve the arsenic removal rate of arsenic-containing copper smelting smoke and dust, and realizes efficient separation and recovery of arsenic from complex arsenic-containing materials, belonging to the field of nonferrous metal pyrometallurgy. Background technique [0002] The global copper industry is developing rapidly. According to statistics released by the World Bureau of Metal Statistics (WBMS) on February 15, 2015, the global output of refined copper in 2015 was 22.883 million tons, and the supply of refined copper is still in short supply. In the next few years, the output of refined copper in China will remain will maintain steady growth. The arsenic-containing fume produced in the copper smelting process is an important raw material for recovering gold, silver and various valuable metals; however, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B1/02C22B30/04
CPCC22B1/02C22B7/001C22B7/02C22B30/04Y02P10/20
Inventor 彭兵朱顺刘恢梁彦杰陈玉洁姚文明王忠兵
Owner CENT SOUTH UNIV
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