Technology for directly extracting copper and zinc by using copper dust wet method

A copper soot and copper extraction technology, applied in the direction of improving process efficiency, etc., can solve the problems of low added value of products, high price of zinc powder, and large damage to the furnace body, etc., and achieve high added value of products, low cost, and low cost Effect

Active Publication Date: 2014-03-19
温贵能
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) Direct return to the furnace; because the content of the target element for material extraction is low, and it is a volatile component, chlorine is more harmful to the furnace body, and the actual recovery rate of direct return to the furnace is too low, and often only one of copper or zinc can be extracted. Therefore, the economic benefit is relatively the worst
(2) Recycle only as copper material or only as zinc material by a single wet process; because the two components of copper and zinc are not high, the recovery of copper and zinc requires a large amount of alkali treatment, the cost is high and

Method used

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  • Technology for directly extracting copper and zinc by using copper dust wet method

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Comparison scheme
Effect test

Embodiment 1

[0040] Copper soot Cu6.27%, Zn12.39%. Normal temperature 20°C, sulfuric acid leaching, solid-liquid ratio 1:2.5, leaching process beating for 30 minutes, reaction time 2 hours, sulfuric acid dosage by weight is 0.18 times the weight of copper soot. Vacuum suction filtration is performed after leaching, and the filter residue is washed with warm water at 30-40°C. The copper leaching rate was 62.94%, the zinc leaching rate was 90.55%, and the slag rate was 32.5%. The filtrate was adjusted to pH 3.0 with 15% soda ash, and vacuum-filtered twice with two layers of filter paper to obtain a clear and transparent solution. Take 100ml of N902 and 400ml of 260# kerosene, mix them evenly, and prepare the extracted organic phase. Use a 125ml separatory funnel as a reactor for single-stage copper extraction. The flow ratio of the organic phase to the liquid is 2:1. The extraction mixing time is 5 minutes, and the extraction and clarification time is 3 minutes. Pre-extraction solution Cu...

Embodiment 2

[0042] Copper soot Cu6.27%, Zn12.39%. Temperature 44°C, sulfuric acid leaching, adding oxidant sodium chlorate, solid-to-liquid ratio 1:2.5, beating for 30 minutes during leaching, reaction time 2 hours, the amount of sulfuric acid by weight is 0.24 times the weight of copper soot, chloric acid by weight The amount of sodium used is 0.007 times the weight of copper soot. Vacuum suction filtration is performed after leaching, and the filter residue is washed with warm water at 30-40°C. The copper leaching rate is 98.01%, and the slag rate is 13.25%. The filtrate was adjusted to pH 3.0 with 15% soda ash, and vacuum-filtered twice with two layers of filter paper to obtain a clear and transparent solution. Take 75ml of N902 and 425ml of 260# kerosene, mix them evenly, and prepare the extracted organic phase. Use a 125ml separatory funnel as a reactor for single-stage copper extraction. The flow ratio of the organic phase to the liquid is 3:1. The extraction mixing time is 5 min...

Embodiment 3

[0044]Copper soot Cu6.27%, Zn12.39%. Temperature 50°C, sulfuric acid leaching, add oxidant sodium chlorate, solid-to-liquid ratio 1:2, leaching process beating for 30 minutes, reaction time 4 hours, the amount of sulfuric acid by weight is 0.23 times the weight of copper soot, chloric acid by weight The dosage of sodium is 0.01 times of the weight of copper soot. Vacuum suction filtration is performed after leaching, and the filter residue is washed with warm water at 35-40°C. The copper leaching rate was 97.02%, and the slag rate was 19.11%. The filtrate was adjusted to pH 3.5 with 15% soda ash, and vacuum-filtered twice with two layers of filter paper to obtain a clear and transparent solution. Take 100ml of N902 and 400ml of 260# kerosene, mix them evenly, and prepare the extracted organic phase. Use a 125ml separatory funnel as a reactor for single-stage copper extraction. The flow ratio of the organic phase to the liquid is 2:1. The extraction mixing time is 5 minutes,...

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Abstract

The invention discloses a technology for directly extracting copper and zinc by using a copper dust wet method for carrying out high-activity processing on a low-grade copper dust material. The technology provided by the invention comprises the following steps of leaching, removing organic matters, extracting copper, removing iron, aluminum and chromium, extracting zinc, and leaching a zinc-free solution (20-30% of open loop can be achieved during the process). The technology provided by the invention has the advantages that a direct extracting operation technology is adopted, more low-grade copper dust can be recycled, the total amount of environment waste is reduced, meanwhile, the product percent conversion is high, the added value of a product is high, the cost is low, the technology has energy-saving and an environment-friendly properties, the low-grade high-impurity dust material which is generated by smelting crude copper through a pyrogenic process and is hard to process at present can be processed, and the valuable metal of the low-grade copper-zinc dust is fully recycled.

Description

technical field [0001] The invention relates to a treatment technology for copper soot produced in a pyro-method refining crude copper plant, and is mainly aimed at the treatment of low-copper, low-zinc, chlorine-containing and high-impurity materials. Through the optimization and adjustment of leaching and extraction process parameters, the emulsification and three-phase problems in extraction are solved, so as to realize the extraction of copper with special extractant. By controlling the impurity components and adjusting the pH value, the effect similar to that of special zinc extraction is achieved. High-purity copper material and high-purity zinc material are obtained by back extraction respectively, and metal products are subsequently obtained by conventional electrowinning. [0002] The present invention starts from the fundamental point, upgrades the process, greatly improves the product yield rate and product conversion rate, reduces emissions from the source, and ef...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B15/00C22B19/30
CPCY02P10/20
Inventor 温贵能
Owner 温贵能
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