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Method for comprehensively recovering valuable elements from high-arsenic-containing copper smelting soot

A technology for copper smelting soot and valuable elements, applied in the direction of improving process efficiency, etc., can solve the problems of complex process, unrecyclable water, low direct yield of valuable metals, etc., and achieves a reasonable process flow, which is beneficial to harmless Chemical treatment, significant economic and social benefits

Inactive Publication Date: 2013-10-23
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a comprehensive recovery process, which can recover valuable elements from high-arsenic copper smelting soot in an efficient and environmentally friendly manner, so as to avoid the complicated process of the existing recovery treatment method, the direct recovery rate of valuable metals is not high, and the water cannot be circulated Take advantage of other disadvantages

Method used

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  • Method for comprehensively recovering valuable elements from high-arsenic-containing copper smelting soot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The main components of typical materials of high-arsenic copper smelting soot are shown in Table 2:

[0037] Chemical composition in table 2 copper soot

[0038] main element

Cu

Zn

Pb

sn

Bi

In

As

Ag

Content (%)

6.04

2.13

30.83

2.78

0.28

285g / t

22.17

0.057

[0039] The arsenic content in the arsenic trioxide accounts for 52% of the total arsenic content.

[0040] Take 150kg of soot and roast it with air at 600°C for 2 hours, and collect 51.2kg of arsenic trioxide soot. The slag weighs 104.5kg. Then leaching with 98g / L sulfuric acid, the liquid-solid ratio is 4:1, the leaching temperature is 90°C, and the leaching time is 3h. After stirring and filtering, the leaching solution rich in zinc and copper and rich in lead and tin slag are obtained. Lead-rich and tin slag are sent to recover lead and tin, and zinc-rich and copper solutions are sent to the extraction process a...

Embodiment 2

[0042] Take 150kg of white soot, and roast it by feeding oxygen-enriched air (with an oxygen content of 30%) at 550° C. to collect 50.9 kg of arsenic trioxide dust and 105.6 kg of slag. Then leaching with 147g / L sulfuric acid, the liquid-solid ratio is 4:1, the leaching temperature is 90°C, and the leaching time is 3h. After stirring and filtering, the leaching solution rich in zinc and copper and rich in lead and tin slag are obtained. Lead-rich and tin slag are sent to recover lead and tin. The zinc-rich and copper solution is sent to the extraction process after adding iron powder (excess coefficient is 1.4) to replace copper with P204 (P204: sulfonated kerosene=3:7, water phase : oil phase=2:1 for extraction) to extract zinc, and the raffinate is returned to the leaching process to configure sulfuric acid for leaching. The obtained zinc-rich organic phase is sent to the stripping process, and 98g / L sulfuric acid is used for stripping to obtain a high-zinc solution, and the o...

Embodiment 3

[0044] Take 150kg of white soot, pass it into oxygen-enriched air (oxygen content is 45%) for roasting at 470°C, collect 50.56kg of arsenic trioxide dust and 107.1kg of slag. Then leaching with 98g / L sulfuric acid, the liquid-solid ratio is 4:1, the leaching temperature is 90°C, and the leaching time is 3h. After stirring and filtering, the leaching solution rich in zinc and copper and rich in lead and tin slag are obtained. Lead-rich and tin slag are sent to reclaim lead and tin, and zinc-rich and copper solutions are sent to the extraction process after adding iron powder (excess coefficient is 1.2) to replace copper with P204 (P204: sulfonated kerosene = 3: 7, water phase : oil phase=2:1 for extraction) to extract zinc, and the raffinate is returned to the leaching configuration for leaching with sulfuric acid. The obtained zinc-rich organic phase is sent to the stripping process, and 98g / L sulfuric acid is used for stripping to obtain a high-zinc solution, and the obtained...

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Abstract

The invention provides a method for comprehensively recovering valuable elements from high-arsenic-containing copper smelting soot. According to the method, the valuable elements in the high-arsenic-containing copper smelting soot are comprehensively recovered by carrying out the processes of (oxygen-enrichment) roasting, leaching, extracting, replacing and crystallizing on the high-arsenic-containing copper smelting soot, the recovery ratio of zinc, copper, lead and tin is all over 95%, and the recovery ratio of arsenic trioxide reaches over 95%. The method for comprehensively recovering the valuable elements, provided by the invention, has the advantages of reasonable technological process, high metal direct recovery ratio, low cost for treating three wastes and remarkable economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of comprehensive recovery and utilization of metallurgy and metallurgical waste residue, and relates to a method for comprehensive recovery of valuable elements from high-arsenic copper smelting soot. Background technique [0002] At present, most copper smelting enterprises in the world use fire method for smelting, and some soot will be produced during the smelting process. In addition to some valuable metals, such as copper, zinc, lead, tin, etc., the soot also contains arsenic oxides. With the different components of smelting raw materials, the composition of soot is also very different. If the soot is directly returned to the smelting system without treatment, it will inevitably increase the content of impurities in the raw materials and deteriorate the furnace condition, thereby reducing the processing capacity of the furnace and even affecting normal production. In addition, the cyclic accumulation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/02C22B3/08C22B3/46C22B3/26C22B15/00C22B19/30C22B30/04
CPCY02P10/20
Inventor 曹佐英肖连生王富源张虎李立清张晓峰张贵清李青刚
Owner CENT SOUTH UNIV
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