A method for cooperating with copper smelting slag to treat gold-containing waste slag

A technology for copper smelting slag and waste slag, which is applied to the treatment field of copper smelting slag and gold-containing waste slag, can solve the problems of high content of copper matte impurities, reduce the quality of copper matte, deteriorate the properties of slag, etc., and achieve high-efficiency enrichment, low cost, Handling large-scale effects

Active Publication Date: 2022-07-29
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Smelting copper under oxygen-enriched smelting conditions will produce a large amount of Fe with high melting point 3 o 4 , deteriorating the properties of the slag, resulting in high copper content in the slag
At present, the copper depletion technology only considers the recovery of copper, but does not consider the recovery of valuable metals such as lead and zinc, and almost all the blowing slag / refining slag with high lead and zinc is returned to the smelting process, and Pb and Zn are circulated in the smelting process, resulting in copper The high impurity content of matte reduces the quality of copper matte and increases the pressure of impurity removal in subsequent processes

Method used

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  • A method for cooperating with copper smelting slag to treat gold-containing waste slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] like figure 1 As shown, a method for cooperating with copper smelting slag to process gold-containing waste slag includes the following steps:

[0038] (1) Using 300g of hot copper smelting slag as raw material, its main chemical composition includes Cu26.2%, Pb8.9%, Zn3.41%, Fe30.2%, SiO 2 1.56%, CaO8.68%. 30g of gold cyanide tailings were added to the molten copper smelting slag through the feeding device, and the chemical composition of the gold cyanide tailings included SiO 2 60%, Au5g / t, Ag30.2g / t, Fe7.8%, and add 30g of pyrite, keep smelting at 1300°C for 2h, to obtain copper matte and sulfide slag. The grade of copper matte is 60.62%; the sulfide slag contains 1% copper, 0.11g / t gold and 0.5g / t silver, and lead and zinc basically exist in the sulfide state in the sulfide slag.

[0039] (2) Mix the hot sulfide slag with the hot smelting slag. The main chemical composition of the smelting slag includes Cu3.03%, Pb0.53%, Zn2.72%, Fe40.31%, SiO 2 21.1%, CaO1.62%....

Embodiment 2

[0041] like figure 1 As shown, a method for cooperating with copper smelting slag to process gold-containing waste slag includes the following steps:

[0042] (1) Using 300g copper flash smelting slag as raw material, its main chemical composition includes Cu26.2%, Pb8.9%, Zn3.41%, Fe30.2%, SiO 2 1.56%, CaO8.68%. 50g of gold cyanide tailings were added to the molten copper smelting slag through the feeding device, and the chemical composition of the gold cyanide tailings included SiO 2 60%, Au5g / t, Ag30.2g / t, Fe7.8%, and add 45g of pyrite, keep smelting at 1300°C for 2h, to obtain copper matte and sulfide slag. The grade of copper matte is 58.3%; the sulfide slag contains 1.1% copper, 0.14g / t gold, 0.56g / t silver, and lead and zinc basically exist in the sulfide state in the sulfide slag.

[0043] (2) Mix the hot sulfide slag with the hot smelting slag. The main chemical composition of the smelting slag includes Cu3.03%, Pb0.53%, Zn2.72%, Fe40.31%, SiO 2 21.1%, CaO1.62%. ...

Embodiment 3

[0045] like figure 1 As shown, a method for cooperating with copper smelting slag to process gold-containing waste slag includes the following steps:

[0046] (1) Using 300g copper smelting slag as raw material, its main chemical composition includes Cu26.2%, Pb8.9%, Zn3.41%, Fe30.2%, SiO 2 1.56%, CaO8.68%. 50g of gold cyanide tailings were added to the molten copper smelting slag through the feeding device, and the chemical composition of the gold cyanide tailings included SiO 2 65.2%, Au4.5g / t, Ag40.2g / t, Fe9.8%, and add 45g of pyrite, keep smelting at 1300 ℃ for 2h, to obtain copper matte and sulfide slag. The grade of copper matte is 59.62%; the sulfide slag contains 0.82% copper, 0.19g / t gold and 0.39g / t silver, and lead and zinc basically exist in the sulfide state in the sulfide slag.

[0047] (2) Mix the hot sulfide slag with the hot smelting slag. The main chemical composition of the smelting slag includes Cu3.03%, Pb0.53%, Zn2.72%, Fe40.31%, SiO 2 21.1%, CaO1.62%...

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Abstract

The invention discloses a method for treating gold-containing waste slag with copper smelting slag. Silver-copper matte, flue gas and sulfide slag, described rich in gold-silver-copper matte recover gold, silver and copper through refining; (2) the sulfide slag obtained in step (1) is mixed with copper smelting slag, adding vulcanizing agent 2 to smelt , flotation of the smelted product to obtain copper sulfide, zinc sulfide and lead sulfide. The invention realizes the efficient enrichment and recovery of copper and gold resources in copper blowing slag / copper refining slag and gold-containing waste slag through the coordinated matching of copper smelting slag and gold-containing waste slag; High-efficiency enrichment of copper, lead and zinc in copper smelting slag is achieved.

Description

technical field [0001] The invention belongs to the field of metallurgical engineering, in particular to a method for treating copper smelting slag and gold-containing waste slag. Background technique [0002] Copper is an important basic material, and consumption is large and growing continuously. In 2019, China's refined copper production was 9.784 million tons, an increase of 5.5% over 2018, while its apparent Chinese demand was 12.8 million tons, an increase of 2.5% over the same period last year. With the mining of copper resources, the grade of copper ore has reached 0.2%-0.3%, and copper metallurgy is facing severe challenges, so it is more and more important to recover its valuable metals from copper smelting slag. Smelting copper under oxygen-rich smelting conditions will produce a large amount of Fe with a high melting point 3 O 4 , deteriorate the properties of the slag, resulting in high copper content in the slag. At present, the copper depletion technology ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B15/00C22B11/02C22B13/02C22B19/00
CPCC22B7/002C22B7/04C22B15/0054C22B11/023C22B13/025C22B19/00Y02P10/20
Inventor 王亲猛李中臣郭学益王松松李栋田庆华张倍恺王琼琼
Owner CENT SOUTH UNIV
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