Comprehensive recovery process of low-grade matte slag metal resources
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A low-grade, matte technology, applied in the direction of photography technology, photography auxiliary technology, process efficiency improvement, etc., can solve the problems of no harmless resource recycling process, high cost of iron removal, waste of resources, etc. , to achieve high environmental and economic benefits, reduce the cost of iron removal, and low investment
Active Publication Date: 2016-06-22
GUANGZHOU ZHONGKE ZHENGCHUAN ENVIRONMENTAL PROTECTION TECH CO LTD
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[0003] As a dangerous solid waste, matte slag contains relatively low content of valuable metals and sulfur, and also contains a certain amount of As. If it is treated by conventional pyrometallurgical methods, it will waste resources and cannot avoid the formation of secondary pollution.
If wet treatment is used, because
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Embodiment 1
[0029] A comprehensive recovery process for low-grade matte slag metal resources, comprising the following processing steps:
[0030] 1) The composition of matte slag produced by a factory: Cu4.1%, Pb5.44%, Fe38.37%, Zn1.41%, Ag0.05%, CaO3.3%, S8.06%; this sample is broken After ball milling until 95% of the sample particle size is less than 0.074mm, take 500g of the sample, mix it according to the proportion of solid content of 25%, and then use permanent magnet semi-countercurrent magnetic separator for magnetic separation. The magnetic field strength is 800 gauss, and the yield of iron concentrate is 13.3%, the obtained iron concentrate grade reaches 70.04%;
[0031] 2) Take 100g of magnetic separation tailings and add it to a beaker filled with 500ml of sulfuric acid solution with a concentration of 2mol / L. At the same time, add 1.1 times the theoretical amount of pyrolusite. Place the beaker in a water bath that has been heated to 95°C and stir for 2 hours. After filteri...
Embodiment 2
[0039] A comprehensive recovery process for low-grade matte slag metal resources, comprising the following processing steps:
[0040] 1) The composition of matte slag produced by a factory: Cu2.57%, Pb5.18%, Zn4.68%, Ag0.039%, Fe50.74%, S20.74%; this sample is broken and ball milled to 100% sample After the particle size is less than 0.074mm, take a 300g sample, mix the slurry according to the proportion of solid content of 30%, and then use a permanent magnet semi-countercurrent magnetic separator for magnetic separation. The magnetic field strength is 800 gauss, and the iron concentrate yield is 13.6%. The obtained iron Concentrate grade reaches 67.7%;
[0041] 2) Take 100g of magnetic separation tailings and add it to a beaker filled with 500ml of sulfuric acid solution with a concentration of 2mol / L. At the same time, add a theoretical amount of pyrolusite. Put the beaker in a water bath that has been heated to 90°C, stir for 3 hours, and then filter . The leaching rates...
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Abstract
The invention discloses a comprehensive recovery process of low-grade matte slag metal resources. The process comprises the following steps: 1) matte slag performs the crushing and the wet ball milling to reach 100% of particle sizes less than 0.074 mm, and is magnetically separated by a permanent magnetic separator; and magnetically separated tailing is dehydrated for metal leaching and extraction; 2) the magnetically separated tailing performs the oxide leaching to comprehensively leach and extract valuable metal; leaching liquid is extracted to recover Cu; and strip liquor passes through electrodeposition cathode copper plate; 3) copper raffinate removes iron by using a goethite method; after Fe is removed, supernatant is extracted to recover Zn, and the strip liquor is concentrated and crystallized to prepare zinc sulfate; the obtained raffinate is extracted to recover manganese; and the strip liquor is concentrated and crystallized to prepare manganese sulfate; 4) after the raffinate is absorbed by activated carbon to reduce COD, heavy metal is treated by sulfide precipitation; and 5) after leaching slag performs the alkali washing, elemental sulfur and a lead-silver sulfide ore are recovered by flotation. The process solves the difficulty of incomplete recycling of low-grade matte slag, realizes comprehensive recovery of low-grade matte slag resources, and is higher in environmental benefit and economic benefit.
Description
technical field [0001] The invention relates to a comprehensive recovery process of low-grade matte slag metal resources, which belongs to the field of solid waste resource recovery. Background technique [0002] Matte slag is a by-product produced in the process of pyro-recovery of lead secondary resources, which contains valuable metals such as iron, lead, zinc, copper, and silver. 30%-50% of the iron in the matte slag exists in the form of elemental iron, and the rest of the iron exists in the form of FeS. The composition of matte slag is roughly as follows: Cu2-5%, Pb3-10%, Zn3-10%, Ag0.01-0.06%, Fe35-60%, S10-20%, most of the matte slag contains a certain amount As. [0003] As a dangerous solid waste, matte slag contains relatively low content of valuable metals and sulfur, and also contains a certain amount of As. If it is treated by conventional pyrometallurgical methods, it will waste resources and cannot avoid the formation of secondary pollution. . If wet trea...
Claims
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