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Method for recovering and utilizing kiln slag of zinc hydrometallurgy volatilizing kiln

A technology of hydrometallurgy and kiln slag, which is applied in the direction of wet separation, chemical instruments and methods, and filtration and sieving, can solve the problems that it is difficult to obtain pure or grade-enriched products, and achieve environmental pressure reduction, effective utilization, and The effect of improving the recovery rate

Inactive Publication Date: 2010-02-03
ZHUZHOU SMELTER GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gap between the spherical α-Fe and sphalerite is filled with FeS, and the FeS is embedded with particulate lead-iron, antimony-copper alloy and metallic silver, so it is difficult to obtain pure or high-grade ferrite by general physical methods. collection of products

Method used

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  • Method for recovering and utilizing kiln slag of zinc hydrometallurgy volatilizing kiln
  • Method for recovering and utilizing kiln slag of zinc hydrometallurgy volatilizing kiln
  • Method for recovering and utilizing kiln slag of zinc hydrometallurgy volatilizing kiln

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] The specific composition of the kiln slag sample used is: iron 35.14%, copper 1.03%, zinc 5.03%, gallium 194g / ton, indium 154g / ton, germanium 20g / ton, silver 160g / ton, sulfur 5.13% , silicon oxide 20.24%, carbon 14%. Phase analysis shows that the iron in the kiln slag is mainly metallic iron, followed by ferrous oxide and ferrous sulfide; the copper in the kiln slag is mainly metallic copper and copper sulfide.

[0109] As shown in Figure 1, the kiln slag is crushed into a particle size of about 2mm with a jaw crusher, and the magnetic separator is used for primary separation, and the field strength adopted is 1500 Oersted to obtain the first non-magnetic part (tailings) I) and the first magnetic fraction (coarse concentrate I). Then ball mill the coarse ore I to a fineness of about 200 meshes, and use a weak magnetic separator to carry out dry concentration under a field strength of 600 Oersted to obtain the second non-magnetic part (tailings II) and the second magnet...

Embodiment 2

[0111] The specific composition of the kiln slag sample used is: iron 35.14%, copper 1.03%, zinc 5.03%, gallium 194g / ton, indium 154g / ton, germanium 20g / ton, silver 160g / ton, sulfur 5.13% , silicon oxide 20.24%, carbon 14%. Phase analysis shows that the iron in the kiln slag is mainly metallic iron, followed by ferrous oxide and ferrous sulfide; the copper in the kiln slag is mainly metallic copper and copper sulfide.

[0112] As shown in Figure 1, the kiln slag is crushed into a particle size of about 2mm with a jaw crusher, and the magnetic separator is used for primary separation, and the field strength adopted is 1500 Oersted to obtain the first non-magnetic part (tailings) I') and the first magnetic fraction (coarse concentrate I'). Then ball mill the coarse concentrate I' to a fineness of about 200, and use a weak magnetic separator to carry out wet concentration under a field strength of 600 Oersted to obtain the second non-magnetic part (tailings II') and the second m...

Embodiment 3

[0118] As shown in Figure 2, the kiln slag from the volatilization kiln undergoes hydraulic washing in the slag washing pool, and after separating part of the coke powder (recycled coke), the kiln slag is crushed and ground into a kiln slag with a particle size of less than 2mm, which is then dried with a dry A type magnetic separator is used for magnetic separation, and its magnetic field strength is 800-1800 Oersted, most preferably 1000 Oersted, to obtain secondary coke and iron slag. Iron slag can be used as a lead-returning ingredient. The results are shown in Table 11. The yield of the magnetic part (iron slag) is 60%, the iron grade can be increased to 60.21%, and the carbon can be reduced to 2.36%; a large amount of carbon, silicon, magnesium, calcium, aluminum, etc. are enriched in the non-magnetic part of the secondary coke , the yield is 40%, the carbon recovery rate is 87.7%, and its carbon content is 25%.

[0119] Table 11 Example 3 test results

[0120]

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Abstract

The invention relates to a method for recovering and utilizing kiln slag of a zinc hydrometallurgy volatilizing kiln, comprising the following steps: firstly, crushing the kiln slag into particles with the particle diameter of about 0.01 to 2 mm, and carrying out primary selection under the magnetic field intensity of 800 to 1800 oersteds to obtain a first magnetic part and a first non magnetic part of the kiln slag; and secondly, crushing the first magnetic part into 200 meshes with the particle size range of 50 to 60 percent by weight, and carrying out fine selection with the magnetic fieldintensity of 500 to 1090 oersteds to obtain a second magnetic part and a second non magnetic part. By adopting the method, the recovery rate of metal component or carbon component in the kiln slags isobviously enhanced, the kiln slag is efficiently utilized to the maximum, and the environmental pressure is greatly reduced.

Description

technical field [0001] The invention relates to the field of metal smelting, in particular to a method for processing and recycling zinc volatilization kiln slag in hydrometallurgy. Background technique [0002] Zinc leaching slag is a solid waste produced during the hydrometallurgy process. In addition to common metal elements such as zinc, lead, copper, and iron, it also contains a certain amount of rare and precious metals such as gallium, germanium, indium, and silver, which has great comprehensive utilization value. More than 70% of zinc in the world is produced by hydrometallurgy, and zinc leaching slag is the first by-product of hydrometallurgy zinc smelting plant, so zinc leaching slag is one of the very important renewable resources of rare and precious metals. The comprehensive recovery of valuable elements in zinc leaching slag can obtain great economic benefits, and turn waste into treasure, which is beneficial to environmental protection. [0003] In order to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/00B03B7/00C22B13/02C22B7/04C22B11/00C22B15/02C22B30/06C22B19/30C22B1/16C22B5/10B03C1/30B07B15/00B07B1/28
Inventor 王辉肖功明曾纪斌刘朗明窦传龙陈顺唐明成魏文武彭海良夏中卫易克俊
Owner ZHUZHOU SMELTER GRP
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