Waste-free environment-friendly recovery method for copper-containing difficult-to-treat material

A recycling method and a difficult-to-treat technology, applied in the field of hydrometallurgy, can solve the problems of no treatment process, difficult grinding, and high energy consumption, and achieve the effect of promoting the quality of crystalline products and reducing the impact

Pending Publication Date: 2022-03-22
蒙自矿冶有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fire pretreatment methods also have derivative problems such as high energy consumption, poor environmental protection, and long process flow.
[0008] Since matte matte materials are hard to break, hard to grind, hard to leach, and there is no reliable and perfect treatment process to choose from, most enterprises can only choose to sell them externally, and a large amount of valuable metal resources such as lead, antimony, silver, tin, and indium are not priced or symbolic. Pricing brings large economic losses to enterprises and has become a key common technical problem in the recovery of associated copper resources in the smelting industry

Method used

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  • Waste-free environment-friendly recovery method for copper-containing difficult-to-treat material
  • Waste-free environment-friendly recovery method for copper-containing difficult-to-treat material

Examples

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example 1

[0044] Such as figure 1 and figure 2 As shown, the lead matte produced by the applicant unit in the lead smelting process is also called matte matte or massive copper-containing sulfide co-melt. Utilize the method of the present invention to process, the process of reclaiming copper and other valuable metals is as follows:

[0045] Step 1: Crushing the massive copper-containing sulfide eutectic (2050Kg, Cu25%, Ag0.1%, Pb10%, Fe15%, S20%) through a jaw crusher and a sander to a particle size of 4-8mm After that, it is sent to ball mill 1 for wet grinding. The material below 200 mesh at the bottom of the overflow outlet of the ball mill enters the spiral classifier and returns to the ball mill to continue grinding. After the overflow pulp is filtered, the grinding filter residue with a particle size larger than 200 mesh is sent to low-acid leaching iron.

[0046] Step 2: Grinding water is recycled for a long time, and the alkali concentration and pH value of the alkaline mat...

example 2

[0053] Such as figure 1 and figure 2 Shown, a kind of copper-containing refractory material, property is the same as example 1, and its specific recovery steps are as follows:

[0054] Step 1: The massive copper-containing sulfide eutectic (2075Kg, Cu30%, Ag0.15%, Pb13%, Fe19%, S14%) produced in the lead smelting production process is crushed by a jaw crusher and a sand blasting machine After reaching a particle size of 4-8 mm, it is sent to ball mill 1 for wet grinding. The material below 200 mesh at the bottom of the overflow outlet of the ball mill enters the spiral classifier and returns to the ball mill to continue grinding. The overflow ore pulp is filtered to obtain the grinding filter residue with a particle size larger than 200 mesh and sent to low-acid leaching for iron removal.

[0055] Step 2: Grinding water, that is, the grinding filtrate is recycled for a long time. The alkaline material is dissolved in the water and the pH value of the alkali concentration gr...

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Abstract

The invention relates to a waste-free environment-friendly recovery method for copper-containing difficult-to-treat materials, which comprises the following steps of: crushing the materials, grinding into ore pulp, and filtering to obtain ore grinding filter residues and ore grinding filtrate; carrying out low-acid iron leaching on the ore grinding filter residues, filtering to obtain low-acid leaching filter residues and low-acid leaching filtrate, recycling the ore grinding filtrate, neutralizing to be neutral by using acid waste liquid when the alkali concentration and impurities rise, and filtering to return to ore grinding for use; carrying out oxidation iron precipitation on the low-leaching filtrate, neutralizing until the pH value is 3-5, blowing compressed air at the temperature of 80-85 DEG C to oxidize low-valent iron ions so as to form iron colloidal precipitate, filtering to obtain neutralized purified liquid and neutralized iron precipitation slag, returning the neutralized purified liquid to low-acid iron leaching operation, and returning the neutralized iron precipitation slag to lead smelting and slagging; carrying out high-temperature high-acid oxygen pressure leaching on the low-leaching filter residues, and filtering to obtain high-leaching filtrate and high-leaching filter residues; cooling and saturating the high-leaching filtrate to separate out a copper sulfate crystal product, and feeding high-leaching filter residues to lead for smelting to recover lead and silver. The method is easy to operate, treats waste with waste, is low in cost, and efficiently recycles valuable metal in an environment-friendly manner without three wastes.

Description

technical field [0001] The invention relates to hydrometallurgy technology, in particular to a waste-free and environmentally friendly recycling method for copper-containing refractory materials. Background technique [0002] In the process of lead smelting and production, lead is a good collector for gold, silver and copper. The main production process often produces a kind of copper-containing refractory material of lead-silver-copper-iron polymetallic sulfide fusion, commonly known as lead matte. It is generally hard and blocky, difficult to break, difficult to grind and difficult to leach. Among them, the phase composition copper is Cu 2 S and CuFeS exist in the form, lead exists in the form of PbS, sulfur exists in the form of PbS, Cu 2 S form exists, and iron exists in the form of CuFeS. [0003] Copper associated with lead ore enters crude lead during pyrometallurgy, and smelting or sulfur addition is used to remove copper to produce copper scum during pyrorefining...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/00C22B15/00C22B13/02C22B11/02C30B29/10C30B28/04C30B7/14
CPCC22B7/007C22B1/005C22B15/0089C22B13/025C22B11/021C30B29/10C30B7/14C30B28/04Y02P10/20
Inventor 香钦华周忠跃班莹
Owner 蒙自矿冶有限责任公司
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