Method for reclaiming metal by copper smelting-furnace magnesia brick lining

A technology for copper smelting furnace and magnesia brick, which is applied in metallurgy and chemical fields, and can solve the problems of land occupation and environmental pollution.

Inactive Publication Date: 2007-12-05
HULUDAO ZINC IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The demolished magnesia refractory bricks are usually discarded as waste, which not only occupies land, but also causes environmental pollution

Method used

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  • Method for reclaiming metal by copper smelting-furnace magnesia brick lining

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Experimental program
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Effect test

Embodiment

[0038] Manually randomly select 3 tons of waste magnesia bricks for copper smelting converter lining. Use a ball mill to pulverize and grind to 200 mesh, and then use the shrinkage method to sample. Chemical analysis data show that the content of copper in waste magnesia bricks is 10.3%, and the content of silver is 898μg·g -1 , the gold content is 3 μg g -1 . From these experimental results, the metals in waste magnesia bricks have recycling value. Since the magnesia content in waste magnesia bricks is between 60% and 65%, it is necessary to effectively remove magnesia for metal recovery, and then recover copper after removing magnesia, so that silver and gold can be highly enriched.

[0039] 1. Raw material crushing process:

[0040] The artificially selected magnesia refractory bricks with high metal content are crushed and ground into powder, passed through a 200-mesh sieve, and used as raw materials for metal extraction.

[0041] 2. Magnesium removal process:

[004...

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Abstract

The present invention relates to metallurgical and chemical technology, and is especially process of recovering metals from magnesia brick as lining of copper smelting furnace. The process includes the following steps: crushing magnesia brick as the material, demagging, oxidizing roasting, extracting copper, deleading, and extracting gold and silver. The process can extract gold, silver, copper and other noble metals, recover magnesium sulfate and side products and protect environment.

Description

technical field [0001] The invention proposes a method for recovering metals by utilizing magnesia bricks lining copper smelting furnaces in the field of metallurgy and chemical industry. Background technique [0002] Copper smelting is carried out in a heated state in a metallurgical furnace lined with magnesia bricks. Since the copper concentrate contains valuable metals such as gold, silver and lead in addition to copper, there are some metals in the smelting process. Diffused and absorbed by the magnesia refractory bricks lining the furnace. When the lining refractory magnesia brick is damaged or reaches the service life, it needs to be removed and the masonry lining should be replaced again. The demolished magnesia refractory bricks are usually discarded as waste, which not only occupies land, but also causes environmental pollution. Since valuable metal elements such as copper, lead, gold and silver are adsorbed and enriched in the magnesia refractory bricks of the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06C22B1/14C22B3/22C22B1/02C22B3/44C22B26/22C22B15/00C22B13/00C22B11/00
CPCY02P10/20
Inventor 高良宾姜恒奚英洲宋丽娟陈传明王宝文王明辉刘桂甫张光旭张杰
Owner HULUDAO ZINC IND CO LTD
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