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A method for extracting lead-bismuth alloy from copper anode slime smelting waste residue

A copper anode slime and lead-bismuth alloy technology, applied in the field of metallurgy, can solve the problems of lead-bismuth loss, high lead and bismuth content, low Ag content, etc., and achieve the effects of efficient separation and recovery, high lead-containing grade and low solubility

Active Publication Date: 2020-11-06
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The main treatment process of copper anode slime is a combination of wet method and fire method, "copper anode slime - pressure leaching of copper, tellurium - pyromelting, blowing - silver electrolysis - recovery of gold from silver anode slime", in pyromelting The smelting waste slag produced in the process contains low gold and silver, high lead and bismuth, generally contains Ag0.1-0.3%, contains Au5-20g / t, contains Pb25-30%, and contains Bi4-6%. Copper anode slime has a large amount of smelting waste residue and low Ag content, which cannot be returned to the copper anode slime pyro-smelting system to recover precious metals. Generally, it enters the copper smelting system to further enrich gold and silver to copper anode slime, resulting in the dispersion loss of gold and silver, and Part of lead and bismuth enters copper smelting waste residue, resulting in loss of lead and bismuth
Using this method to treat copper anode slime smelting waste residue, lead and bismuth cannot be recovered, and the treatment process is long and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Mix 4t of copper anode slime smelting waste slag, 0.2t of coke, 0.6t of limestone, and 0.08t of sodium carbonate into the Caldo furnace for reduction smelting. After reduction smelting, slag is removed to obtain 1.81t of crude lead-bismuth alloy melt, and the crude lead-bismuth alloy is melted The body is transferred to the intermediate frequency furnace through the tundish, and the temperature of the melt is kept at 700°C in the intermediate frequency furnace for 0.5h, and then the temperature of the melt is lowered to 600°C, and 0.018t of crushed coke and 0.009t of quartz are added to remove copper for 1h After forming copper scum, remove the slag; reduce the melt temperature to 350°C, add 0.065t of sulfur to remove nickel for 2 hours, and remove the slag; raise the melt temperature to 530°C, add 0.22kg of zinc particles to remove silver for 4 hours, and remove the melt The temperature is lowered to 400°C to remove the slag, and a refined lead-bismuth alloy is obtained...

Embodiment 2

[0016] Mix 4t of copper anode slime smelting waste residue, 0.22t of coke, 0.68t of limestone, and 0.12t of sodium carbonate into the Caldo furnace for reduction smelting. After reduction smelting, the slag is removed to obtain 1.76t of crude lead-bismuth alloy, and the crude lead-bismuth alloy melt is passed through Transfer the tundish to the intermediate frequency furnace, keep the melt temperature at 750°C for 0.5h in the intermediate frequency furnace, then lower the melt temperature to 600°C, add 0.026t of crushed coke and 0.014t of quartz to remove copper by melting for 1.5h, Remove slag after forming copper scum; reduce the melt temperature to 380°C, add 0.073t sulfur to remove nickel for 2.5 hours, and remove slag; raise the melt temperature to 545°C, add 0.36kg zinc particles to remove silver for 5 hours, and The temperature is lowered to 400°C to remove the slag, and a refined lead-bismuth alloy is obtained.

[0017] The resulting refined lead-bismuth alloy contains...

Embodiment 3

[0019] Mix 4t of copper anode slime smelting slag, 0.24t of coke, 0.76t of limestone, and 0.16t of sodium carbonate into the Caldo furnace for reduction smelting. After reduction smelting, the slag is removed to obtain 1.75t of crude lead-bismuth alloy, and the crude lead-bismuth alloy melt is passed through Transfer the tundish to the intermediate frequency furnace, keep the melt temperature at 800°C for 0.5h in the intermediate frequency furnace, then lower the melt temperature to 600°C, add 0.035t of crushed coke and 0.017t of quartz to melt and remove copper for 2h, and form Remove slag after copper scum; reduce the melt temperature to 400°C, add 0.087t sulfur to remove nickel for 3 hours, and remove slag; raise the melt temperature to 560°C, add 0.44kg zinc particles to remove silver for 6 hours, and lower the melt temperature The slag is removed at 400°C to obtain a refined lead-bismuth alloy.

[0020] The resulting refined lead-bismuth alloy contains 0.019% Cu, 0.010% N...

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PUM

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Abstract

The invention belongs to the technical field of metallurgy, and relates to a method for extracting a lead-bismuth alloy from copper anode slime smelting waste. The method includes the following stepsthat the copper anode slime smelting waste and a flux are mixed to be added into a Kaldo furnace for reduction smelting, a coarse lead-bismuth alloy is obtained by drossing after reduction smelting, and after the coarse lead-bismuth alloy melt is transferred to an intermediate frequency furnace, liguation decoppering, sulphurating denickeling and zincification silver separation are successively conducted to obtain the refined lead-bismuth alloy; and the flux includes coke, limestone and sodium carbonate, and the flux is prepared from the components in percentage by mass of the copper anode slime smelting waste: 5-6% of coke, 15-19% of limestone and 2-4% of sodium carbonate. According to the method for extracting the lead-bismuth alloy from the copper anode slime smelting waste, the obtained refined lead-bismuth alloy has high lead grade and few impurities, lead and bismuth can be recovered by direct lead electrolysis separation, gold and silver are recovered by furnace returning of silver-zinc crust, and efficient separation and recovery of lead, bismuth and gold and silver from the copper anode slime smelting waste are realized.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and relates to a method for extracting lead-bismuth alloy from copper anode slime smelting waste residue. Background technique [0002] The main treatment process of copper anode slime is a combination of wet method and fire method, "copper anode slime - pressure leaching of copper, tellurium - pyromelting, blowing - silver electrolysis - recovery of gold from silver anode slime", in pyromelting The smelting waste slag produced in the process contains low gold and silver, high lead and bismuth, generally contains Ag0.1-0.3%, contains Au5-20g / t, contains Pb25-30%, and contains Bi4-6%. Copper anode slime has a large amount of smelting waste residue and low Ag content, which cannot be returned to the copper anode slime pyro-smelting system to recover precious metals. Generally, it enters the copper smelting system to further enrich gold and silver to copper anode slime, resulting in the dispersion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B30/06C22B13/02C22B11/02
CPCC22B7/001C22B7/002C22B7/004C22B7/04C22B11/023C22B13/025C22B30/06Y02P10/20
Inventor 杜彦君钟清慎张燕王立俞宏山罗明儒李生民田飞
Owner JINCHUAN GROUP LIMITED
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