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Method and Application of Recovering Copper and Zinc from Brass Melting and Casting Soot

A brass and soot technology, applied in the field of resource utilization of solid waste in the metallurgical process, can solve the problems of multiple waste residues or waste water, long process flow, and difficulty in impurity removal, and achieve cost reduction, simple process flow, and controllability strong effect

Active Publication Date: 2022-03-04
BEIJING MINING & METALLURGICAL TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] One of the objectives of the present invention is to provide a method for recovering copper and zinc from the soot of yellow copper melting and casting, which solves the problems of long process flow, complicated process, high cost, difficult removal of impurities and generation of more waste residue or waste water in the prior art. technical problem

Method used

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  • Method and Application of Recovering Copper and Zinc from Brass Melting and Casting Soot
  • Method and Application of Recovering Copper and Zinc from Brass Melting and Casting Soot

Examples

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Embodiment 1

[0097] This embodiment provides a method for reclaiming copper and zinc from yellow miscellaneous copper melting and casting soot, and the process roadmap is as follows figure 1 shown, including the following steps:

[0098] (1) Take 20kg of mixed soot and roast it with air at 900°C for 1 hour to obtain a roasted product, and at the same time condense the roasted flue gas to obtain a condensate.

[0099] (2) The roasted product is leached with dilute sulfuric acid according to the liquid-solid ratio of 5:1, and the final pH value is 2. The leaching solution is filtered to obtain leaching residue and leaching liquid.

[0100] (3) The leaching solution is replaced with a zinc plate, the anode is a zinc plate, the cathode is a titanium plate, and the voltage between the cathode and the anode is 0.2V. After the reaction is completed, copper-rich slag and replaced liquid are obtained.

[0101] (4) Add the roasted product of step (1) to the liquid after replacement to adjust the p...

Embodiment 2

[0104] This example provides a method for recovering copper and zinc from yellow miscellaneous copper melting and casting soot. The difference from Example 1 is that in step (1), air is roasted at 1000°C for 2 hours, and the rest of the steps and conditions are the same as those in Example 1. 1 are the same and will not be repeated here.

Embodiment 3

[0106] This example provides a method for recovering copper and zinc from yellow miscellaneous copper melting and casting soot. The difference from Example 1 is that in step (1), oxygen is roasted at 1100°C for 1 hour, and the volume concentration of oxygen at this time is 40 %, all the other steps and conditions are the same as in Example 1, and will not be repeated here.

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Abstract

The invention provides a method and application for recovering copper and zinc from yellow miscellaneous copper melting and casting soot, and specifically relates to the technical field of resource utilization of solid waste in metallurgical processes. In the method, oxidative roasting is carried out to remove F and Cl from brazed copper melting and casting soot, and at the same time, the aluminum compound is transformed into α-type alumina to obtain an oxidative roasting product, and then the copper and zinc are recovered. Wherein, the temperature of oxidation roasting is 900-1200°C, and the time of oxidation roasting is 0.5-2h. Brass copper melting and casting soot can efficiently remove harmful elements F and Cl through oxidation and roasting, and promote the transformation of aluminum compounds in soot, reduce the leaching of aluminum, and reduce the cost of subsequent impurity removal. The process is simple and highly controllable. The F removal rate can reach over 99.8%, and the Cl removal rate can reach over 98%. It realizes the harmless disposal of harmful elements and the high-value recovery of valuable metals. application prospects.

Description

technical field [0001] The invention relates to the technical field of resource utilization of solid waste in metallurgical processes, in particular to a method and application for recovering copper and zinc from yellow copper melting and casting soot. Background technique [0002] Brass alloy is formed by adding various trace elements on the basis of copper and zinc. After the end of its life cycle, it turns into brass and becomes a new urban solid waste. Brass copper will produce soot during the melting and casting stage of recycling and producing brass alloys. The soot contains Zn, Cu, Pb, F, Cl, Fe, Al and other elements. Most metal elements exist in the form of oxides and compounds. And a small amount of Zn exists in simple form. [0003] The content of valuable metals such as Zn and Cu in the soot is high, and direct discharge causes waste; and the soot contains more F and Cl compounds, which are hazardous wastes and need to be properly disposed of. There are followi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/02C22B1/02C22B15/00C22B19/02C25C1/16
CPCC22B7/02C22B7/006C22B1/02C22B15/0002C22B19/02C22B15/0091C22B19/26C25C1/16Y02P10/20
Inventor 揭晓武王成彦刘伟张永禄郜伟马保中陈永强阮书锋王振文张坤坤崔成旺
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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