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Method for collecting noble metal from polymetallic alloy material

A multi-metal and precious metal technology, applied in the direction of improving process efficiency, etc., to achieve the effects of low production cost, simple process operation, and easy industrialization

Active Publication Date: 2016-08-17
KUNMING BOREN PRECIOUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] In summary, pressurized ammonia leaching is used to remove copper, the leaching slag is leached with nitric acid, filtered to concentrate and remove nitrate, diluted, and filtered to separate the main metal lead. The method has not been reported yet

Method used

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  • Method for collecting noble metal from polymetallic alloy material

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Comparison scheme
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Embodiment 1

[0026] See attached figure 1 , conditions: 1000 grams of multi-metal alloy materials, the amount of ammonium carbonate is 1 times the weight ratio of the raw materials, the amount of ammonia water is 2 times the weight ratio of the raw materials, the leaching temperature is 100 ° C, the pressure is 0.8 MPa, the time is 6 hours, and the stirring speed is 250 rpm. After the pressure leaching is completed, filter and wash to obtain ammonia leaching liquid and ammonia leaching residue respectively; use nitric acid to selectively leach lead, and the amount of nitric acid is 0.8 times the weight of the material. Add water to dilute, and the amount of water added is twice the weight ratio of the material. After stirring evenly, filtering and washing, the acid leaching solution and acid leaching residue are obtained respectively. The leaching solution mainly contains lead, etc., and the acid leaching residue contains antimony, gold, platinum, palladium, etc. Metals; acid leaching slag...

Embodiment 2

[0028] See attached figure 1 , conditions: 5000 grams of multi-metal alloy materials, the amount of ammonium bicarbonate is 1.5 times the weight ratio of raw materials, the amount of ammonia water added is 1 times the weight ratio of raw materials, the leaching temperature is 120 ° C, the pressure is 1.0 MPa, the time is 4 hours, and the stirring speed is 250 rpm. After the pressure leaching is completed, filter and wash to obtain ammonia leaching liquid and ammonia leaching residue respectively; use nitric acid to selectively leaching lead, the amount of nitric acid is 0.9 times the weight of the material, when the sample is analyzed and the lead leaching is complete, continue heating and concentrating until viscous , add low-concentration sodium hydroxide to dilute, and the dosage is 2 times of the weight ratio of the material. After stirring evenly, filtering and washing, acid leaching solution and acid leaching residue are obtained respectively. The leaching solution mainly...

Embodiment 3

[0030] See attached figure 1 , Conditions: see attached picture, conditions: 10,000 grams of multi-metal alloy materials, the amount of ammonium bicarbonate is 1.0 times the weight ratio of the raw materials, the amount of ammonia water is 1.5 times the weight ratio of the raw materials, the leaching temperature is 160°C, the pressure is 1.6MPa, and the time is 4h , the stirring speed is 250rpm, after the pressurized leaching is finished, filter and wash to obtain the ammonia leaching solution and the ammonia leaching residue respectively; use nitric acid to selectively leaching lead, the amount of nitric acid is 1.0 times of the material weight, when the sampling analysis is complete, continue Heat and concentrate until viscous, add low-concentration sodium carbonate to dilute, the dosage is 1 times the weight ratio of the material, stir evenly, filter and wash, and obtain acid leaching liquid and acid leaching residue respectively. The leaching liquid mainly contains lead, et...

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Abstract

The present invention discloses a method for collecting noble metal from polymetallic alloy material. The method is as below: mixing a polymetallic alloy material with ammonium salt, placing the mixture in an autoclave for pressure leaching of primary metals copper and nickel, filtering and washing after leaching, respectively acquiring a leaching solution and ammonia leaching residue, and using the leaching solution as copper and nickel recycling raw material; adding nitric acid into ammonia leaching residue, leaching in a closed titanium reactor for some time, and heating to concentrate and evaporate residual nitrate; when the reaction products reach a viscous state, stopping heating, while adding water for dilution, filtering and washing to respectively obtain a leaching solution and acid leaching residue containing antimony, gold, platinum and palladium; using the leaching solution containing lead as a raw material for recycling lead; removing antimony by pressure alkali leaching, filtering and washing to obtain alkaline leaching solution and alkaline leaching slag; and immersing precious metals into the slag, so as to effectively enrich precious metals. The method has the advantages of simple operation procedure, mature equipment, environment-friendliness, low production cost, high precious metal enrichment ratio, and good prospects for industrial application.

Description

technical field [0001] The invention belongs to the field of rare metal metallurgy and relates to a method for collecting precious metals from multi-metal alloy materials. Background technique [0002] Multi-metal alloy precious metal material is a refractory material for extracting precious metals from secondary resources, mainly containing lead, copper, nickel, antimony, gold, silver, platinum, palladium, etc., of which lead content is about 10~30%, copper 15~20% %, 6~20%, antimony 6~18%, gold, platinum and palladium content is about 300~1000g / t, the value is relatively high, most of the materials come from non-ferrous metal secondary resource recycling enterprises, especially silver recycling enterprises. It is difficult to remove non-ferrous metals such as lead, copper, nickel, antimony, tin, etc. in the current pyrooxidative blowing process. The precious metals enter the smoke dust along with the flue gas generated by blowing, causing serious dispersion. The traditional...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B11/00
CPCY02P10/20
Inventor 范兴祥陈利生刘振楠
Owner KUNMING BOREN PRECIOUS METALS
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