A comprehensive recovery method of zinc-copper alloy ash

A technology of zinc-copper alloy and recycling method, which is applied in the field of hydrometallurgy, can solve the problems of high production cost, and achieve the effects of improving recovery rate, easy handling, and small amount of waste slag

Active Publication Date: 2019-05-07
六盘水中联工贸实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Production costs are also higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: When an enterprise produces zinc-copper alloy (brass) containing 30% zinc and 70% copper, 50kg of zinc-copper alloy ash (including scum ash) is produced per ton of alloy. They contain 35% zinc, 64.5% copper, 1.2g / ton gold and 8.2g / ton silver. Grind to more than 100 mesh, then according to liquid / solid = 5, use dilute sulfuric acid containing 150g / L of sulfuric acid to adjust the slurry, and at the same time add manganese oxide and hydrogen peroxide according to 10% of the raw material, stir and raise the temperature to 80°C, pre-leaching for 30 minutes Transfer to cooling storage tank. Proceed with the mixing operation. The cooling storage tank is stirred and cooled, and automatically flows into the copper 5-level continuous electrolytic leaching tank through the overflow pipe. The space in each tank is 1.2 cubic meters. When the slurry in the last tank reaches half, the electrolysis starts. Each level is equipped with 4 cathode plates, 6 An anode plate wit...

Embodiment 2

[0037] Example 2: A certain factory recycles waste miscellaneous copper and carries out pyrometallurgy to produce zinc-copper alloy ash and soot ash mixture containing 45.2% copper and 53.8% zinc, using the equipment and technical process of Example 1 to carry out zinc-copper slurry Electrolytic leaching was carried out continuously for 15 days to obtain electrolytic copper containing 99-99.2% of copper, electrolytic zinc containing 97.8-98.2% of zinc, press filter residue containing 0.75-0.9% of copper and 0.42-0.63% of zinc, and the average current efficiency of copper electrolysis was 91.8 %, the average zinc is 84.5%.

Embodiment 3

[0038] Embodiment 3, using a certain enterprise pyrometallurgical copper soot, containing 28.2% copper and 55.6% zinc. Use the equipment and technical process of Example 1 to carry out electrolytic leaching of zinc and copper ore slurry, and continue to produce for 15 days, the quality of electrolytic copper obtained is 98.5-99.2%, the quality of electrolytic zinc is 96.5-98%, and the copper content of filter residue is 0.68-0.85%. , Zinc 0.8-0.95%, the average current efficiency is 90% for copper and 80.3% for zinc.

[0039] In summary, in Examples 1-3, the obtained refined copper contains more than 98% of copper, the obtained rough zinc contains more than 96% of zinc, the electrolytic leaching residue contains less than 1% of zinc and less than 1% of copper, and the raffinate is filtered and returned to use .

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Abstract

The invention discloses a comprehensive recycling method for zinc-copper alloy ash. The zinc-copper alloy ash comprising 30%-40% of zinc and 60%-70% of copper is subjected to pulp mixing leaching for0.5-1 h in a mixed solution comprising 120-160 g / L sulfuric acid and comprising, by raw material percent, 5-10% manganese oxide or 5-10% hydrogen peroxide under the condition that the ratio of liquidto solid is 4-5, then the mixture is transferred into a stirring cooling storage tank, the mixture automatically flows into a five-level copper ore pulp electrolysis leaching groove through a storagetank overflow port to be subjected to copper ore pulp electrolysis leaching, and then the mixture automatically flows into a four-level zinc ore pulp electrolysis leaching groove through an overflow port of the five-level copper ore pulp electrolysis leaching groove to be subjected to zinc ore pulp electrolysis leaching. Refined copper, copper containing crude zinc and gold-silver containing leaching slag are obtained. Continuous ore pulp electrolysis leaching of the zinc-copper alloy ash under the sulfuric acid medium is conducted through the two sets of continuous ore pulp electrolysis leaching grooves, the multi-level leaching and electrolysis integration is achieved, and the zinc-copper leaching recycling rate and the gold and silver content of the leaching slag are improved.

Description

technical field [0001] The present invention aims at the comprehensive recovery of relatively pure zinc-copper alloy ash produced in the process of zinc-copper alloy production, processing and pyrometallurgy waste copper raw materials, and adopts direct electrolytic leaching of ore pulp to obtain metallic copper and metallic zinc respectively under different electrolytic leaching conditions. The invention belongs to the field of hydrometallurgy. Background technique [0002] The production and processing of copper-based zinc-copper alloy will produce by-product zinc-copper alloy ash and a certain amount of zinc-copper alloy scum. Zinc-copper alloy ash and smoke are also produced when scrap copper is recycled for pyrometallurgy. [0003] The traditional method is to oxidize and roast the mixed solution of zinc sulfate and copper sulfate leached with sulfuric acid, and then replace it with zinc powder or iron powder to obtain sponge copper. After the replacement, the liquid i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/02C22B3/08C22B15/00C22B19/20C22B3/02
CPCC22B3/02C22B3/045C22B3/08C22B7/007C22B7/02C22B15/0071C22B19/22Y02P10/20
Inventor 李世平钟波
Owner 六盘水中联工贸实业有限公司
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