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Method for recovering valuable metals by smelting copper dross

A valuable metal, copper scum technology, applied in the direction of improving process efficiency, can solve the problems of high anti-corrosion requirements, high heavy metal content, large equipment investment, etc., to reduce the slag production rate, reduce industrial solid waste, collapse The effect of material phenomenon reduction

Pending Publication Date: 2022-05-27
HENAN YUGUANG GOLD & LEAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wet process treatment of copper scum has a high degree of separation of copper and lead, but the process is complicated, the anti-corrosion requirements are high, the equipment investment is large, the cost is high, and the heavy metal content in the waste liquid is high.

Method used

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  • Method for recovering valuable metals by smelting copper dross
  • Method for recovering valuable metals by smelting copper dross

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The method for smelting and reclaiming valuable metals from copper dross of the present invention, the detailed steps of the method are as follows:

[0049] A, with copper scum, iron filings, slag-forming agent antimony smelting slag and reducing agent carbon particles as raw materials, the addition of the iron filings is 3% of the total weight of the copper scum, the addition of the slag-forming agent antimony smelting slag It is 7% of the total weight of the copper scum, and the addition of the reducing agent carbon particles is 4% of the total weight of the copper scum;

[0050] b. Carry out ingredients according to the dosage in step a, add the prepared materials into the smelting furnace for heating reduction smelting, and control the smelting temperature to be 1200°C and the smelting time to be 12h during the smelting process;

[0051] c. After reduction and smelting, crude lead, smelting slag, matte and flue gas are produced; the lead metal in the copper dross en...

Embodiment 2

[0054] The method for smelting and reclaiming valuable metals from copper dross of the present invention, the detailed steps of the method are as follows:

[0055] A, with copper scum, iron filings, slag-forming agent antimony smelting slag and reducing agent carbon particles as raw materials, the addition of the iron filings is 3% of the total weight of the copper scum, the addition of the slag-forming agent antimony smelting slag It is 6% of the total weight of the copper scum, and the addition of the reducing agent carbon particles is 4% of the total weight of the copper scum;

[0056] b. Carry out ingredients according to the dosage in step a, add the prepared materials into the smelting furnace for heating reduction smelting, and control the smelting temperature to be 1150°C and the smelting time to be 12h during the smelting process;

[0057] c. After reduction and smelting, crude lead, smelting slag, matte and flue gas are produced; the lead metal in the copper dross en...

Embodiment 3

[0060] The method for smelting and reclaiming valuable metals from copper dross of the present invention, the detailed steps of the method are as follows:

[0061] A, with copper scum, iron filings, slag-forming agent antimony smelting slag and reducing agent carbon particles as raw materials, the addition of the iron filings is 3% of the total weight of the copper scum, the addition of the slag-forming agent antimony smelting slag It is 8% of the total weight of the copper scum, and the addition of the reducing agent carbon particles is 4% of the total weight of the copper scum;

[0062] b. Carry out ingredients according to the dosage in step a, add the prepared materials into the smelting furnace for heating reduction smelting, and control the smelting temperature to be 1250°C and the smelting time to be 12h during the smelting process;

[0063] c. After reduction and smelting, crude lead, smelting slag, matte and flue gas are produced; the lead metal in the copper dross en...

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Abstract

The invention discloses a method for recovering valuable metals by smelting copper dross. The method comprises the following steps: proportioning copper dross, scrap iron, a slag former and a reducing agent as raw materials; the prepared materials are added into a smelting furnace for heating reduction smelting, and crude lead, smelting slag, matte and flue gas are generated through reduction smelting; lead metal in the copper dross enters lead bullion, tin metal enters lead bullion, and copper metal enters matte; the generated lead bullion enters a tin removal process, and enters a lead bullion electrolysis process to produce electrolytic lead after tin slag is produced; transferring the matte into a copper smelting system for recycling; the flue gas is subjected to dust collection treatment, the treated flue gas enters a tail gas system to be emptied, and the obtained soot returns to the smelting process to be reused as an ingredient. According to the technical scheme, the fluidity of the copper dross smelting slag can be obviously improved, the layering effect of slag, matte and lead bullion in the furnace in the smelting process is enhanced, the phenomena of slag adhesion and material collapse in the furnace are reduced, the slag index is obviously reduced, the operation is safe and controllable, and the labor intensity is reduced.

Description

1. Technical field: [0001] The invention belongs to the nonferrous metal pyrometallurgical smelting industry, and particularly relates to a method for recovering valuable metals by smelting copper dross. 2. Background technology: [0002] Copper scum is the product of crude lead pyrorefining, smelting and removing copper, accounting for about 2% of crude lead content, mainly composed of copper sulfide, lead sulfide, lead oxide and metal lead, and also contains tin, arsenic, zinc, cadmium, Silver, gold and other metal elements. Due to different slag scavenging methods or slag scavenging equipment, the shape and composition of copper scum are quite different. The content of valuable metals in copper scum is relatively rich, generally containing 2 to 40% of copper, 40 to 85% of lead, 300 to 1000g / t of silver, and 20g / t to 100g / t of gold. Therefore, if the copper scum is not comprehensively utilized, secondary resources will be wasted; at the same time, elements such as lead, ...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B15/00C22B13/02C22B5/10C22B25/02C22B25/06
CPCC22B7/04C22B7/001C22B15/0052C22B13/025C22B5/10C22B25/02C22B25/06Y02P10/20
Inventor 张迎军冯瑞康杜新路陈阳高卫忠段晶晶王红军
Owner HENAN YUGUANG GOLD & LEAD
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