Bullion lead comprehensive treatment method

A comprehensive treatment of precious lead technology, applied in chemical instruments and methods, lead halides, antimony compounds, etc., can solve problems such as high environmental pressure, and achieve the effect of simple equipment, short process and low energy consumption

Active Publication Date: 2019-08-27
KUNMING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although wet treatment can avoid environmental pollution by smoke and dust, the wet leaching process will produce a large amount of waste acid and waste water that needs to be treated, and it also faces the problem of high environmental pressure.

Method used

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  • Bullion lead comprehensive treatment method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] 2000kg noble lead materials (Pb 35.14%, Sb14.38%, As 17.21%, Bi 7.60%, Cu 7.54%, Ag 14.93%, Au 18.11g / t, the rest are undetected impurities, the same below, no longer One by one description) placed in a fixed vacuum distillation furnace, cover the vacuum furnace cover to seal the vacuum furnace, use a vacuum pump to evacuate the vacuum in the furnace to 30Pa, and start heating to 800°C when the pressure in the furnace is stable, and carry out the first Stationary vacuum distillation treatment, distillation time 4h, distillation volatiles are condensed and collected in a two-stage condensation method, the first stage is 300-500°C, and the second stage is 25-250°C, of ​​which the lead-bismuth-antimony alloy 920.2 is obtained from the first stage kg (Ag about 0.0154% (154g / t), Cu 0.03%, Sb 6.54%, Pb+Bi 92.09%, As0.91%), the secondary disk obtained 349kg of elemental arsenic (As 95.99%, Pb+Bi+Sb 3.63 %, Cu0.02%, Ag0.0005%); crucible residue 692.2kg (Pb+Bi 0.009%, Sb 32.8%, ...

Embodiment 2

[0087] According to the method for embodiment 1, noble lead alloy is processed. 2000kg precious lead material (component is the same as embodiment 1) is placed in stationary vacuum distillation furnace, covers vacuum furnace lid and vacuum furnace is sealed, with vacuum pump the vacuum in the furnace is drawn to 70Pa, when the pressure in the furnace is stable, start Heating to 900°C, the first stationary vacuum distillation treatment was carried out, the distillation time was 4 hours, the distillation volatiles were condensed and collected by two-stage condensation, and 925.03kg of lead-bismuth-antimony alloy (Ag 203g / t, Cu0.023 %, Sb 7.85%, Pb+Bi 91.09%, As 0.83%), the secondary disc obtained 350kg of elemental arsenic (As 95.7%, Pb+Bi+Sb3.55%, Cu 0.02%, Ag 0.0005%); residual in the crucible 696.2kg (Pb+Bi 0.09%, Sb30.10%, As 0.06%, Cu 21.63%, Ag 42.69%).

[0088]For the lead-antimony-bismuth alloy obtained by the first stationary vacuum distillation, it was first put into ...

Embodiment 3

[0095] According to the method for embodiment 1, noble lead alloy is processed. 2000kg noble lead material (component is the same as embodiment 1) is placed in stationary vacuum distillation furnace, covers vacuum furnace lid and vacuum furnace is sealed, with vacuum pump the vacuum in furnace is drawn to 50Pa, when pressure in furnace is stabilized, start Heating to 850°C, carrying out the first stationary vacuum distillation treatment, the distillation time is 4h, the distillation volatiles are condensed and collected by two-stage condensation, and 931.04kg of lead-bismuth-antimony alloy (Cu 0.21%, Sb8%, Pb +Bi91.19%, As 0.86%, Ag 200g / t), the secondary disc obtained 348.65kg of elemental arsenic (As 96.27%, Pb+Bi+Sb 3.15%, Cu 0.03%, Ag 0.0005%); the residue in the crucible 697.3kg (Pb+Bi0.08%, Sb33.7%, As0.05%, Cu21.48%, Ag42.73%).

[0096] For the lead-antimony-bismuth alloy obtained by stationary vacuum distillation for the first time, first put into the converter blowin...

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Abstract

The invention belongs to the technical field of solid waste recycling and reusing and particularly relates to a bullion lead comprehensive treatment method. Through the bullion lead comprehensive treatment method provided by the invention, open-circuit of arsenic, lead, bismuth and antimony and high-efficiency enrichment of precious metals gold and silver are realized through twice vacuum distillation, and elementary arsenic, a lead-bismuth-antimony alloy, a silver alloy and a copper alloy can be obtained respectively; the lead-bismuth-antimony alloy, the silver alloy and the copper alloy aretreated through oxidizing refining, electrolytic refining and chlorination refining to obtain refined lead, refined bismuth, antimony trioxide and electrolytic silver and electrolytic silver, and goldenrichment is realized; the bullion lead comprehensive treatment method has the advantages of being high in metal direct yield, low in energy consumption, short in flow, simple in equipment and the like in the whole treatment process; and moreover, vacuum distillation belongs to the physical process; the alloys can be separated through the saturated vapor pressure difference of the metals withoutgeneration of waste water, waste gas and waste residues, and industrialization, automation and continuity of bullion lead treatment can be achieved easily.

Description

technical field [0001] The invention belongs to the technical field of solid waste recovery and reuse, and in particular relates to a comprehensive treatment method for precious lead. Background technique [0002] Refined lead is usually produced by fire method + electrolytic refining. After electrolytic refining, a large amount of lead electrolytic anode slime will be produced, which can be processed by fire reduction smelting to obtain precious lead. In addition to lead, the main chemical composition of noble lead also contains a large number of rare and precious metals that exist in metal and alloy phases, such as gold, silver, platinum, copper, antimony and bismuth, etc., which have high economic value and are The main raw material for the comprehensive recovery of rare and precious metals in the lead smelting process. [0003] Pyrochemical processes are usually used at home and abroad to process precious lead, which includes pyromelting-pyrorefining-electrolytic refini...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/00C22B13/06C22B30/06C22B11/02C22B15/14C22B5/12C22B30/04C01G21/16C01G30/00
CPCC01G21/16C01G30/005C22B1/005C22B5/12C22B7/001C22B7/007C22B11/021C22B13/025C22B13/06C22B15/0026C22B30/04C22B30/06Y02P10/20C22B3/22
Inventor 杨斌刘大春蒋文龙查国正徐宝强戴卫平李一夫郁青春陈秀敏杨红卫田阳邓勇王飞熊恒杨佳曲涛孔令鑫
Owner KUNMING UNIV OF SCI & TECH
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