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Method for treating copper slag

A copper slag and pretreatment technology, applied in the field of metal smelting, can solve the problems of less than 1% iron utilization rate, less than 12% copper utilization rate, difficult magnetic separation process, etc., to avoid metal loss and large water consumption, Solve the effects of occupying land and polluting the environment and reducing energy consumption

Inactive Publication Date: 2015-11-11
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Since the iron in the copper slag is mainly distributed in the two phases of olivine and magnetic iron oxide, there are few magnetic iron oxide minerals to choose from, and the two are embedded in each other, and the particle size is small, which makes it difficult to carry out the magnetic separation process. The yield of the obtained iron concentrate is low, the silicon content is seriously high, the cost is high, the quality is poor, and it cannot be used. As a result, the copper utilization rate of the current copper smelting slag is less than 12%, the iron utilization rate is less than 1%, and a large amount of copper slag Because it is difficult to effectively use, it is piled up in the slag yard, which not only occupies land but pollutes the environment, and is also a huge waste of resources

Method used

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  • Method for treating copper slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Copper slag composition: 43.75wt% TFe, 0.45wt% Cu, 1.23wt% Zn and 0.27wt% Pb;

[0059] Processing steps: first dry, crush and sieve copper slag, anthracite and limestone respectively to obtain copper slag particles, anthracite particles and limestone particles, and obtain copper slag particles, anthracite particles and limestone particles in a mass ratio of 100:18 : 11 carry out mixed treatment, obtain mixed material, then adopt pair of roller type high-pressure ball briquetting machine to carry out molding process to mixed material, obtain copper slag pellet, then copper slag pellet is carried out drying treatment, then will pass through drying by distributing device The copper slag pellets are distributed into the regenerative rotary hearth furnace and reduced for 55 minutes at 1550 degrees Celsius to obtain a solid reduction product containing iron-copper alloy particles and flue gas containing lead and zinc elements (the recovered ZnO is 71%, and the zinc recovery T...

Embodiment 2

[0061] Copper slag composition: 37.84wt% TFe, 1.37wt% Cu, 0.6wt% Zn and 0.21wt% Pb;

[0062] Processing steps: first dry, crush and screen copper slag, bituminous coal and sodium carbonate respectively to obtain copper slag particles, bituminous coal particles and sodium carbonate particles, and obtain copper slag particles, bituminous coal particles and sodium carbonate particles according to the mass ratio of Mix at 100:22:15 to obtain the mixed material, and then use the double-roller high-pressure briquetting machine to shape the mixed material to obtain copper slag pellets, then dry the copper slag pellets, and then pass the material distribution device Put the dried copper slag pellets into the regenerative rotary hearth furnace and reduce them for 30 minutes at 1450 degrees centigrade to obtain a solid reduction product containing iron-copper alloy grains and flue gas containing lead-zinc elements (the recovered ZnO is 66% , the zinc recovery rate is 95.5%, the lead rec...

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Abstract

The invention discloses a method for treating copper slag. The method includes the steps that (1) the copper slag, a reducing agent and additives are pre-treated respectively; (2) the pre-treated copper slag, the pre-treated reducing agent and the pre-treated additives are mixed so that a mixed material can be obtained; (3) the mixed material is formed so that copper slag pellets can be obtained; (4) the copper slag pellets are dried so that the dried copper slag pellets can be obtained; (5) at the temperature of 1,350-1,550 DEG C, the dried copper slag pellets are reduced so that a solid reduced product containing iron-copper alloy particles and smoke containing lead and zinc can be obtained; and (6) the solid reduced product containing the iron-copper alloy particles is broken and magnetically separated so that the iron-copper alloy particles and tailings can be obtained respectively. According to the method, multiple metal elements in the copper slag can be comprehensively recycled, and the higher recovery rate is achieved.

Description

technical field [0001] The invention belongs to the technical field of metal smelting, in particular, the invention relates to a method for processing copper slag. Background technique [0002] Copper slag is an industrial solid waste produced in the process of copper smelting. About 10 million tons of copper smelting slag are produced in my country every year. Copper slag is a compound ore metallurgical slag containing valuable metal compounds, which has the characteristics of large quantity, fine particle size, various types and complex composition. The slag contains Fe, Cu, Zn, Pb, Co, Ni and other valuable metals and a small amount of precious metals such as Au and Ag. The content of oxides in copper slag exceeds 95%, and the main mineral component is fayalite (2FeO.SiO 2 ), magnetite (Fe 3 o 4 ) and some amorphous glass composed of gangue. Copper in copper slag is mainly chalcocite (Cu 2 S), metallic copper, and copper oxide exist in the form, and iron mainly exis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B15/00
CPCY02P10/20
Inventor 王欣刘占华曹志成薛逊吴道洪
Owner SHENWU TECH GRP CO LTD
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