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Method for comprehensive recovery of valuable metal from copper-based solid waste

A valuable metal and copper-based technology, which is applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of high equipment requirements, high energy consumption, unsuitable for industrial applications, etc., achieve strong applicability and reduce leaching costs Effect

Active Publication Date: 2020-10-02
CHINA ALUMINUM INT ENG CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent uses electric furnace oxidation melting to put all valuable metals into the alloy in one step. Electric furnace melting does not separate copper from other metals, and electric furnace consumes a lot of energy.
In this patent, the alloy is smelted first, and then all metals are leached by sulfation roasting and leaching. Sulfation roasting requires anti-corrosion equipment, high requirements for equipment, unsuitable for industrial applications, and high energy consumption. The obtained mixed solution contains copper sulfate and Iron sulfate, the leaching rate of copper is 96.5%, and the leaching rate of iron is 65%, and further separation is required in the follow-up
At the same time, this patent can only process copper slag alone, and cannot recover other metals simultaneously, and is only suitable for processing low-grade copper-containing materials

Method used

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  • Method for comprehensive recovery of valuable metal from copper-based solid waste

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Experimental program
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Effect test

Embodiment 1

[0047] The mass percentage of Cu in the copper-based solid waste used in this embodiment is 19.5%, Pb 3.2%, Zn 3.5%, and Sn 3.5%; the mass percentage of carbon in coal is 75%, and the ash content is less than 10%; The flux includes quartz stone and limestone, of which more than 90% is quartz stone, and SiO in quartz stone 2 The mass percentage is 85.5%, and the CaO content in the limestone is 51.3%; the purchased scrap copper contains 80% Cu, Pb 2.5%, Zn 6%, Sn 10%, and the vulcanizing agent contains S 31.3%, Zn 1.3%, FeO61 .5%, tin slag contains Sn 4.5%, Pb 2.6%, Cu 3.5%, Zn 2.5%, sub-zinc oxide fume contains Zn 55%, Pb 2.5%, FeO 20.2%.

[0048] Such as figure 1 As shown, 100kg of copper-based solid waste, 15kg of coal, and 5kg of flux are evenly mixed and batched, and then added to the oxygen-enriched side-blown furnace for reduction and smelting. Blow into the oxygen-enriched concentration with an oxygen concentration of 65%. The oxygen-enriched concentration is the conce...

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Abstract

The invention discloses a method for comprehensive recovery of valuable metal from copper-based solid waste. The method comprises the following steps of performing reduction smelting after uniform mixing and proportioning of the copper-based solid waste, coal and flux, and producing blister copper, reducing slag and dust 1; performing anode refining for the produced blister copper to obtain a copper anode plate, refining slag and dust 2, wherein the fuel rate is 5%-15%, and the slagging rate is 3%-30%; and acid leaching the produced refining slag to obtain cathode copper and leaching residues1. According to the method, not only can copper in the copper-based solid waste be separated effectively, but also scrap copper, secondary zinc oxide dust, tin slag 1 and additional metal solid wastecan be handled; and the purpose of cascade comprehensive and efficient recovery of copper, zinc, lead and tin in the whole process is achieved.

Description

technical field [0001] The invention relates to the recovery of copper-based solid waste, in particular to a method for comprehensively recovering valuable metals from copper-based solid waste. Background technique [0002] Copper-based solid waste comes from a wide range of sources, mainly including various waste residues and wastes produced by non-ferrous smelting, such as copper soot, black copper mud, anode slime, lead matte, multi-metal matte, etc.; Secondary copper, such as copper-containing electroplating sludge, copper in scrap wires and cables or circuit boards, etc. These copper-based solid wastes have complex components, not only containing high-value copper, but also high-value impurity metals such as lead, zinc and tin. Improper treatment will cause huge damage to the environment; and the copper content in copper-based solid waste varies greatly , the copper grade of copper powder, sponge copper and copper mud is 60-90%, while the copper content of electroplati...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B13/02C22B15/00C22B19/30C22B19/20C22B25/02C22B25/06C25C1/12
CPCC22B7/001C22B7/007C25C1/12C22B15/0052C22B15/0067C22B25/06C22B13/02C22B25/02C22B19/30C22B19/20Y02P10/20
Inventor 杨建平张岭张乐如
Owner CHINA ALUMINUM INT ENG CORP
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