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Method for deeply removing impurities and enriching precious metals in complex lead bismuth alloy

A lead-bismuth alloy and deep impurity removal technology is applied in the field of deep impurity removal and precious metal enrichment in complex lead-bismuth alloys, and can solve the problems of difficulty in reprocessing complex lead-bismuth alloys, complex material composition, and no impurity removal method, etc. The production process is easy to control, the operation is convenient, and the effect is ideal.

Inactive Publication Date: 2020-02-07
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Copper anode slime treatment pressurized leaching slag adopts the Kaldor furnace smelting and blowing process. The content of nickel and copper in the pressurized slag of copper anode slime is relatively high, and the content of nickel and copper in the smelting slag and blowing lead slag produced is also high. The complex lead-bismuth alloy produced by reduction, enrichment and smelting of lead smelting slag contains nearly 20 elements, among which, the content of nickel and copper is relatively high, and the material composition is complex, which brings great difficulty to the reprocessing of complex lead-bismuth alloy
For complex lead-bismuth alloys with 60-70% Pb+Bi and 30-40% content of impurities and rare metal elements, the impurity removal process and method have not been reported in the relevant literature, so there is no ready-made impurity removal method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Raw material lead-bismuth alloy composition (unit: %, Au, Pd, Pt g / t) Ag3.56, Au346, Pd19.3, Pt8.94, Ni1.01, Cu2.12, Pb70.4, Se0.47, Te1.93, Bi13.23.

[0049] The complex lead-bismuth alloy is added to the graphite crucible of the intermediate frequency furnace, and the feeding amount of the complex lead-bismuth alloy is W Pb+Bi =10kg / heat, add crushed complex lead-bismuth alloy according to 60% of the crucible capacity of the intermediate frequency furnace;

[0050] Turn on the intermediate frequency furnace to heat up the lead-bismuth alloy, monitor the temperature with a hand-held infrared thermometer, melt the complex lead-bismuth alloy obtained in step A at a temperature of 750°C, and continuously stir the melt during the melting process;

[0051] First time scum removal: Add additives for the first time and stir evenly, slowly cool down to remove impurities, keep the temperature at 580°C, after the scum is precipitated, use a colander to remove the precipitated s...

Embodiment 2

[0062] Raw material lead-bismuth alloy composition (unit: %, Au, Pd, Pt g / t): Ag5.24, Au341, Pd133.5, Pt29.2, Ni7.96, Cu4.04, Pb52.85, As0.63, Sb13.64, Bi13.23.

[0063] The complex lead-bismuth alloy is added to the graphite crucible of the intermediate frequency furnace, and the feeding amount of the complex lead-bismuth alloy is W Pb+Bi =90kg / heat, add crushed complex lead-bismuth alloy according to 70% of the crucible capacity of the intermediate frequency furnace;

[0064] Turn on the intermediate frequency furnace to heat up the lead-bismuth alloy, monitor the temperature with a hand-held infrared thermometer, melt the complex lead-bismuth alloy obtained in step A at a temperature of 850°C, and continuously stir the melt during the melting process;

[0065] First time scum removal: Add additives for the first time and stir evenly, slowly cool down to remove impurities, keep the temperature at 610°C, after the scum is precipitated, use a colander to remove the precipitat...

Embodiment 3

[0076] Raw material lead-bismuth alloy composition (unit: %, Au, Pd, Ptg / t): Ag5.11, Au578, Pd40.51, Pt15.03, Ni8.66, Cu5.96, Pb51.85, As0.63, Sb13 .64, Bi 10.89.

[0077] The complex lead-bismuth alloy is added to the graphite crucible of the intermediate frequency furnace, and the feeding amount of the complex lead-bismuth alloy is W Pb+Bi =150kg / heat, add crushed complex lead-bismuth alloy according to 80% of the crucible capacity of the intermediate frequency furnace;

[0078] Turn on the intermediate frequency furnace to heat up the lead-bismuth alloy, monitor the temperature with a hand-held infrared thermometer, melt the complex lead-bismuth alloy obtained in step A at a temperature of 950°C, and continuously stir the melt during the melting process;

[0079] First time scum removal: add additives for the first time and stir evenly, slowly cool down to remove impurities, keep the temperature at 650°C, after the scum is precipitated, use a colander to remove the precipi...

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Abstract

The invention discloses a method for deeply removing impurities and enriching precious metals in a complex lead bismuth alloy. The method comprises the following steps of feeding, repeatedly removingimpurities, finally removing impurities and separating to obtain a precious metal alloy. The method aims at solving the technical problem that a complex lead bismuth alloy depth impurity removal process technology is innovatively adopted, copper, nickel and other impurities in the complex lead bismuth alloy are removed, the precious metals are extracted from the impurity-removed lead bismuth alloyby applying the core key technology of continuous vacuum distillation to enrich the precious metals, the obtained precious metal alloy and the precious metal grade are extremely high, the content ofvarious impurity elements, especially Ni, is low, oxidation blowing treatment is prone to be carried out in a Kaldo furnace process, and a qualified silver anode plate is obtained.

Description

technical field [0001] The invention belongs to the technical field of pyrometallurgy of rare and precious metals, and in particular relates to a method for deeply removing impurities and enriching precious metals in complex lead-bismuth alloys. Background technique [0002] Copper anode slime treatment pressurized leaching slag adopts Kaldor furnace smelting and blowing process. The content of nickel and copper in the pressurized slag of copper anode slime is relatively high, and the content of nickel and copper in the output smelting slag and blowing lead slag is also high. The complex lead-bismuth alloy produced by reduction, enrichment and smelting of lead smelting slag contains nearly 20 elements, among which nickel and copper are relatively high in content, and the material composition is complex, which brings great difficulty to the reprocessing of complex lead-bismuth alloy. For complex lead-bismuth alloys with 60-70% Pb+Bi and 30-40% impurities and rare metal elemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/02C22B7/00
CPCC22B7/001C22B11/02Y02P10/20
Inventor 钟清慎贺秀珍张燕朱纪念
Owner JINCHUAN GROUP LIMITED
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