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A method for recovering refined bismuth and refined copper from high-copper bismuth slag

A bismuth slag and high-copper technology, which is applied in the field of recovering refined bismuth and refined copper from high-copper bismuth slag, can solve the problems of large dispersion of precious metals, low comprehensive recovery rate of metals, and low grade of coarse bismuth, so as to simplify copper removal steps and save The effect of saving production cost and saving time and cost

Active Publication Date: 2020-02-11
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The wet-pyrochemical combined smelting process can process high-copper-bismuth slag, but there are problems such as long process flow, large dispersion of precious metals, and low comprehensive recovery rate of metals.
The pyrometallurgy process has problems such as incomplete separation of copper and bismuth, low grade of crude bismuth, and failure to meet the requirements of bismuth refining.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 1) Matte smelting

[0057] The main components of high copper bismuth slag are: Bi: 20-50%, Pb: 15-30%, Cu: 10-25%, Sb: 3-6%, Ag: 0.3-1.0%.

[0058] High-copper bismuth slag is mixed with coke, soda ash, borax, pyrite, fluorite, and silica in proportion to obtain a mixture, wherein the amount of coke is 3% of the weight of bismuth slag, the amount of soda ash is 6% of the weight of bismuth slag, and borax The dosage is 20% of the weight of bismuth slag, the dosage of pyrite is 20% of the weight of bismuth slag, the dosage of fluorite is 3% of the weight of bismuth slag, and the dosage of silica is 6% of the weight of bismuth slag. Matte smelting, the melt temperature is controlled at 1200-1300°C, and coarse bismuth, copper matte, alkali slag and smoke are produced; the crude bismuth produced contains 93.53% bismuth, 0.85% lead, 0.19% copper, and 23.42% copper in matte %, containing 49.14% lead and 7.64% bismuth.

[0059] 2) Vacuum distillation to remove silver

[006...

Embodiment 2

[0070] 1) Matte smelting

[0071] The main components of high copper bismuth slag are: Bi: 20-50%, Pb: 15-30%, Cu: 10-25%, Sb: 3-6%, Ag: 0.3-1.0%.

[0072] High-copper bismuth slag is mixed with coke, soda ash, borax, pyrite, fluorite, and silica in proportion to obtain a mixture, wherein the amount of coke is 8% of the weight of bismuth slag, the amount of soda ash is 10% of the weight of bismuth slag, and borax The dosage is 12% of the weight of bismuth slag, the dosage of pyrite is 30% of the weight of bismuth slag, the dosage of fluorite is 5% of the weight of bismuth slag, and the dosage of silica is 10% of the weight of bismuth slag. Matte smelting, the melt temperature is controlled at 1200-1300°C, and coarse bismuth, copper matte, alkali slag and smoke are produced; the crude bismuth produced contains 92.34% bismuth, 2.13% lead, 0.5% copper, and 20.46% copper in matte %, containing 42.09% lead and 9.24% bismuth.

[0073] 2) Vacuum distillation to remove silver

[00...

Embodiment 3

[0084] 1) Matte smelting

[0085] The main components of high copper bismuth slag are: Bi: 20-50%, Pb: 15-30%, Cu: 10-25%, Sb: 3-6%, Ag: 0.3-1.0%.

[0086] High-copper bismuth slag is mixed with coke, soda ash, borax, pyrite, fluorite, and silica in proportion to obtain a mixture, wherein the amount of coke is 6% of the weight of bismuth slag, the amount of soda ash is 8% of the weight of bismuth slag, and borax The dosage is 16% of the weight of bismuth slag, the dosage of pyrite is 25% of the weight of bismuth slag, the dosage of fluorite is 4% of the weight of bismuth slag, and the dosage of silica is 8% of the weight of bismuth slag. Matte smelting, the melt temperature is controlled at 1200-1300°C, and coarse bismuth, matte, alkali slag and smoke are produced; the crude bismuth produced contains 92.87% bismuth, 1.98% lead, 0.37% copper, and 22.34% copper in matte %, containing 45.63% lead and 8.41% bismuth.

[0087] 2) Vacuum distillation to remove silver

[0088] The ...

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Abstract

The invention discloses a method for recovering refined bismuth and refined copper from high copper and bismuth slag, and relates to the field of nonferrous metal metallurgy. The method comprises thefollowing steps of (1) carrying out matte smelting; (2) carrying out vacuum distillation to remove silver; (3) carrying out chlorination to remove lead; (4) carrying out oxidation to remove tellurium;(5) refining at a high temperature; (6) carrying out oxygen pressure leaching to prepare a copper sulfate leaching solution; and (7) carrying out electrolytic process to prepare the refined copper. The method for recovering the refined bismuth and the refined copper from the high copper and bismuth slag is short in process flow, low in operation cost and high in comprehensive recovery degree; thematte smelting process is controlled by adding coke and pyrite and adding properly proportioned soda ash, borax, fluorite and silica into the high copper and bismuth slag, so that the bismuth contentof the produced crude bismuth is improved; and the crude bismuth produced in the matte smelting process has the characteristics of high bismuth and low copper, the crude bismuth contains more than 90% of bismuth, less than 1% of copper and less than 4% of lead, and thus efficient separation of bismuth from lead and copper in the high copper and bismuth slag can be realized.

Description

technical field [0001] The invention relates to the field of nonferrous metal metallurgy, in particular to a method for recovering refined bismuth and refined copper from high-copper bismuth slag. Background technique [0002] In the process of comprehensive recovery of precious metals by the lead anode slime fire method, a high-copper bismuth slag is produced after noble lead oxidation and refining, containing bismuth, lead, copper, antimony, silver and other valuable metals, containing 20-50% of bismuth and 15% of lead -30%, containing 10-25% copper. At present, the common bismuth slag treatment processes mainly include wet-fired combined smelting process and pyrometallurgical smelting process. [0003] Chinese patent 201610990078.1 introduces a process for selectively and efficiently extracting copper and bismuth from high-copper bismuth slag. After acid adjustment, copper is extracted by swirling electrolysis, and the leaching residue is leached with concentrated hydro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B7/00C22B30/06
CPCC22B7/001C22B7/007C22B7/04C22B15/0071C22B30/06Y02P10/20
Inventor 李贵蒋朝金代林涛覃小龙黄前军谭霖尹涛
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD