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Method for enriching platinum group metal secondary resource with high efficiency

A technology for platinum group metals and secondary resources, which is applied in the field of high-efficiency enrichment of platinum group metals secondary resources, and achieves the effects of low energy consumption, good industrialization prospects and simple operation.

Inactive Publication Date: 2016-08-17
KUNMING METALLURGY COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for enriching platinum group metal secondary resource with high efficiency

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Experimental program
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Effect test

Embodiment 1

[0034] See attached figure 1 , condition: platinum group metal secondary resource material 1000g, platinum collector copper sulfide nickel ore addition is platinum group metal secondary resource material weight ratio of 30%, reducing agent anthracite addition is platinum group metal secondary resource material weight ratio 5%, the amount of binder coal tar is 0.5% of the weight ratio of platinum group metal secondary resource materials, and the amount of slagging agent is 50% of the weight ratio of platinum group metal secondary resource materials (of which lime: quartz powder: fluorescent Stone = 3:5:2), mix well, use a ball forming machine to make 5cm pellets, dry to obtain composite pellets; use graphite crucible to pack composite pellets, place them in reduction for reduction, reduction temperature 1200 °C, reduction time 2h, to obtain the platinum group metal alloy matte phase; use pressurized sulfuric acid leaching, the sulfuric acid dosage is 30% of the weight ratio of ...

Embodiment 2

[0036] See attached figure 1 , Conditions: 3000g of platinum group metal secondary resource material, the amount of platinum collector copper sulfide nickel ore is 25% by weight of the platinum group metal secondary resource material, and the reducing agent anthracite is 25% by weight of the platinum group metal secondary resource material 6%, the amount of binder coal tar is 0.4% of the weight ratio of platinum group metal secondary resource materials, and the amount of slagging agent is 40% of the weight ratio of platinum group metal secondary resource materials (of which lime: quartz powder: boron Anhydride = 4:5:1), mix well, use a ball forming machine to make 5cm pellets, dry to obtain composite pellets; use graphite crucible to pack composite pellets, place them in reduction for reduction, reduction temperature 1300 ° C, reduction time 3h, to obtain the platinum group metal alloy sulfonite phase; use pressurized sulfuric acid leaching, the sulfuric acid dosage is 40% of ...

Embodiment 3

[0038] See attached figure 1 , conditions: 2000g of platinum group metal secondary resource material, the amount of platinum collector copper sulfide nickel ore is 30% by weight of platinum group metal secondary resource material, and the amount of reducing agent anthracite is the weight ratio of platinum group metal secondary resource material 6%, the amount of binder coal tar is 0.4% of the weight ratio of platinum group metal secondary resource materials, and the amount of slagging agent is 60% of the weight ratio of platinum group metal secondary resource materials (of which lime: quartz powder: boron Anhydride: gypsum = 3:3:2:2), mix well, use a pelletizing machine to make 5cm pellets, dry to obtain composite pellets; use graphite crucible to pack composite pellets, place them in a reduction medium for reduction, and the reduction temperature is 1200 ℃, the reduction time is 3h, and the platinum group metal alloy matte phase is obtained; pressurized sulfuric acid is used ...

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Abstract

The invention discloses a method for enriching platinum group metal secondary resource with high efficiency. The technology comprises the following steps: a platinum group metal secondary resource material, a trapping agent, a reducing agent, a slagging agent, a binder and moisture are put in a bowl mill for wetting grinding, after the materials are uniformly mixed, a granulator is used for preparing the pellets, the pellets are dried to obtain the composite pellets; a graphite crucible is used for putting the composite pellets, the composite pellets are molten in a reduction furnace, after melting for a while, the composite pellets are dumped into the graphite crucible, then cooled, an upper layer is the melting slag, a lower layer is a platinum metal alloy sulfonium phase, the high efficiency trapping of the platinum group metal is realized; elements such as copper, iron, nickel and sulfur in the alloy phase can be leached by employing pressure acid leaching in a selective mode, after filtering and washing, the platinum group metal concentrate is obtained, and the high efficiency enrichment of the platinum group metal is realized. The method has the advantages of simple operation, high platinum yield, high enrichment ratio, environmental protection, low cost, low energy consumption, and good industrialization prospect.

Description

technical field [0001] The invention belongs to the field of metallurgy of rare and precious metals, and relates to a method for efficiently enriching secondary resources of platinum group metals. Background technique [0002] There are many types of secondary resources of platinum group metals, such as exhaust gas exhaust binary or three-way catalysts, petroleum platinum rhenium, platinum palladium invalid catalysts, hydrogen peroxide palladium catalysts, pharmaceutical catalysts, glass fiber bushings containing platinum and rhodium waste, and nitric acid industry. Platinum group metal secondary resources such as waste platinum mesh can be extracted by wet method, but it consumes a lot of acid and produces a large amount of waste liquid. If the fire method is used for enrichment, a large amount of acid can be saved, which can reduce acid consumption and reduce environmental pollution. At present, the enrichment methods of platinum group metal secondary resources are as fol...

Claims

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Application Information

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IPC IPC(8): C22B11/00
Inventor 范兴祥刘洪萍余宇楠
Owner KUNMING METALLURGY COLLEGE
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