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Method for recovering copper and cobalt from cobalt-containing copper converter slag

A technology for copper converter slag and copper recovery, applied in the field of metallurgy, can solve the problems of large amount of vulcanizing agent and reducing agent, difficult to handle, scaling of leaching equipment, etc., so as to reduce energy consumption cost and equipment investment, and increase processing capacity And treatment energy consumption, process conditions are easy to control the effect

Inactive Publication Date: 2012-08-29
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of these methods are that the operating temperature is high, the energy consumption is high, and the addition of vulcanizing agents and reducing agents is large, resulting in a low enrichment ratio of valuable metals. Usually, the enrichment ratio of cobalt is only 3-6.
However, the investment in acid-resistant high-pressure equipment is large, and the content of valuable metals in copper-cobalt slag is low, resulting in a large amount of material handling and high operating costs
In addition, from the industrial practice of similar high-pressure leaching processes, such as high-pressure acid leaching of laterite nickel ore, the scaling problem of leaching equipment is serious, and the sulfur content in the slag is high, which is difficult to handle and has a great impact on the environment
[0007] Therefore, there is still a lack of reasonable and effective methods for the recovery of copper and cobalt in cobalt-containing copper converter slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The method for reclaiming copper and cobalt from cobalt-containing copper converter slag, the steps are as follows:

[0026] (1) Add quartz, pyrite and fluorite modifiers to the slag bag. In terms of mass percentage, the amount of quartz is 5% of the amount of copper converter slag containing cobalt, and the amount of pyrite is the amount of copper converter slag containing cobalt The amount of fluorite is 6% of the amount, and the amount of fluorite is 5% of the amount of cobalt-containing copper converter slag.

[0027] In terms of mass percentage, the used modifier quartz contains 99% of silicon dioxide, 27% of sulfur in pyrite, and 68% of calcium fluoride in fluorite.

[0028] Pour the 1300°C liquid copper converter slag into the slag bag to make the iron silicate slag flow toward FeS-FeO-Fe 3 o 4 -SiO 2 The single liquid phase region moves, increasing the solubility of FeS in the slag. The added pyrite will decompose into FeS and elemental S under these conditi...

Embodiment 2

[0033] The method for reclaiming copper and cobalt from cobalt-containing copper converter slag, the steps are as follows:

[0034] (1) Add quartz, pyrite and fluorite modifiers to the slag bag. Calculated by mass percentage, the amount of quartz is 8% of the amount of copper converter slag containing cobalt, and the amount of pyrite is the amount of copper converter slag containing cobalt 10% of the amount, and the amount of fluorite is 10% of the amount of cobalt-containing copper converter slag.

[0035] In terms of mass percentage, the content of silicon dioxide in the used modifier quartz is ≥ 99%, the content of sulfur in pyrite is 31%, and the content of calcium fluoride in fluorite is 75%.

[0036] Pour the 1300°C liquid copper converter slag into the slag bag to make the iron silicate slag flow toward FeS-FeO-Fe 3 o 4 -SiO 2 The single liquid phase region moves, increasing the solubility of FeS in the slag. Under these conditions, the added pyrite will be decompos...

Embodiment 3

[0041] The method for reclaiming copper and cobalt from cobalt-containing copper converter slag, the steps are as follows:

[0042] (1) Add quartz, pyrite and fluorite modifiers to the slag bag. Calculated by mass percentage, the amount of quartz is 2% of the amount of copper converter slag containing cobalt, and the amount of pyrite is the amount of copper converter slag containing cobalt The amount of fluorite is 2% of the amount, and the amount of fluorite is 1% of the amount of cobalt-containing copper converter slag.

[0043] In terms of mass percentage, the content of silicon dioxide in the used modifier quartz is ≥99%, the content of sulfur in pyrite is 32%, and the content of calcium fluoride in fluorite is 79%.

[0044] Pour the 1300°C liquid copper converter slag into the slag bag to make the iron silicate slag flow toward FeS-FeO-Fe 3 o 4 -SiO2 The single liquid phase region moves, increasing the solubility of FeS in the slag. Under these conditions, the added py...

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PUM

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Abstract

The invention discloses a method for receiving copper and cobalt from cobalt-containing copper converter slag, which comprises: adding quartz, pyrite and a fluorite modifier in a slag ladle; pouring molten copper converter slag into the slag ladle; controlling the cooling speed of the converter slag to be 1 to 2 DEG C / min and cooling the slag; allowing the slag to cool naturally when the slag cools to 900 DEG C; performing smashing, ore grinding and flotation on the converter slag which is cooled to below 300 DEG C, and recovering copper and cobalt valuable metallic elements from the converter slag. The method of the invention avoids using an electric furnace reduction or electric furnace reduction vulcanizing process with high energy consumption, simplifies equipment, fully uses the sensible heat of the molten slag and is favorable for reducing the energy consumption cost and the equipment investment for processing the copper converter slag. Copper and cobalt sulfide refines obtainedby flotation can be used as cobalt concentrate to be processed individually, and the discarded slag obtained by flotation is low in grade, and the recovery rate of the copper and the cobalt can be improved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a copper converter slag treatment technology, in particular to a method for recovering copper and cobalt from cobalt-containing copper converter slag. Background technique [0002] During the pyro-smelting process of copper-cobalt sulfide ore, about 70% of the cobalt in the matte enters the converter slag. For processes with high cobalt content in raw ore, converter slag will be an important intermediate material for extracting cobalt. [0003] The main composition of converter slag is fayalite and a small amount of magnetite, and the iron content is usually above 40wt%. During the process of smelting and slagging, valuable elements cobalt and copper will enter the slag in the form of mechanical inclusion and chemical dissolution. The content of cobalt is in the range of 0.1~2.0wt%, and the content of copper is about 4~10wt according to the level of smelting operation. % range...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B15/00C22B23/00
CPCY02P10/20
Inventor 翟秀静符岩姜澜畅永锋李斌川
Owner NORTHEASTERN UNIV LIAONING