Method for fusing enriched precious metal from spent automotive catalyst

A technology of automotive catalysts and precious metals, applied in the direction of improving process efficiency, etc., can solve the problems of large waste water, low recovery rate, etc., and achieve the effects of convenient process operation, low production cost, and small dosage

Inactive Publication Date: 2013-10-02
GUIYAN RESOURCE YIMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage is that the technology is simple, the equipment investment is small, and the operability is strong; the disadvantage is that the recovery rate is low and a large amount of waste water is generated

Method used

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  • Method for fusing enriched precious metal from spent automotive catalyst
  • Method for fusing enriched precious metal from spent automotive catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take the block-shaped invalid automobile exhaust catalyst and crush it, grind it to a powder with a particle size of 30 mesh, then weigh 500g of the ground material, add 50g of copper sulfide ore, add 15g of calcium oxide, and add SiO 2 10g.

[0022] Mix the above materials evenly, put them into a graphite crucible, and keep the temperature at 1250°C for 4 hours in a high-temperature resistance furnace. After the smelting is completed, the crucible is taken out to cool naturally, and then the slag and the metal phase are separated to obtain 23 grams of the precious metal copper matte phase and 512 grams of the smelting slag. The content is 2.8g / t.

Embodiment 2

[0024] Take the block-shaped invalid automobile exhaust catalyst and crush it, grind it to a powder with a particle size of 200 mesh, then weigh 500g of the ground material, add 100g of copper sulfide ore, add 30g of calcium oxide, and add SiO 2 20g.

[0025] Mix the above materials evenly, put them into a graphite crucible, and keep the temperature at 1450°C for 2 hours in a high-temperature resistance furnace. After the smelting was completed, the crucible was taken out to cool naturally, and then the slag and the metal phase were separated to obtain 51 grams of the precious metal copper matte phase and 536 grams of the smelting slag. After the slag sample was crushed and ground, the sample was sent to analyze the content of the precious metal in the slag. The total amount of platinum, palladium and rhodium was The content is 1.3g / t.

Embodiment 3

[0027] Take the block-shaped invalid automobile exhaust catalyst and crush it, grind it to a powder with a particle size of 200 mesh, then weigh 500g of the ground material, add 125g of copper sulfide ore, add 30g of calcium oxide, and add SiO 2 20g.

[0028] Mix the above materials evenly, put them into a graphite crucible, and keep the temperature at 1350°C for 1 hour in a high-temperature resistance furnace. After the smelting is completed, the crucible is taken out to cool naturally, and then the slag and the metal phase are separated to obtain 63 grams of the precious metal copper matte phase and 515 grams of the smelting slag. After the slag sample is broken and ground, the sample is sent to analyze the content of the precious metal in the slag, platinum palladium rhodium The total content is 1.8g / t.

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Abstract

The invention relates to a method for fusing enriched precious metal from a spent automotive catalyst. The method takes copper sulfide ore as a capturing agent and comprises the following main procedures: (1) grinding: grinding the spent automotive catalyst to obtain powder with the particle size of 30-200 mesh; (2) mixing: uniformly mixing the ground spent automotive catalyst with the capturing agent, a fusing agent and other auxiliary materials; (3) fusing: loading the uniformly mixed materials into a graphite crucible, and fusing in a high-temperature electric resistance furnace; (4) phase separation: separating two phases after fusing so as to obtain the copper and matte phase with more than 98.5% enriched precious metal and the slag phase with less than 3g/t precious metal. With adoption of the method, the operation procedure is efficiently reduced, the production cost is lowered, and the better environmentally-friendly effect is achieved.

Description

technical field [0001] The invention relates to a method for smelting and enriching precious metals from exhausted automobile exhaust catalysts, in particular to a method for capturing precious metals in exhausted automobile catalysts with copper sulfide concentrate. Background technique [0002] Platinum group metal resources are scarce and expensive. Due to the unique purification ability of platinum group metals on automobile exhaust, more than 60% of platinum, palladium, and rhodium are used to produce automobile exhaust purification catalysts every year. Therefore, platinum is recovered from exhausted automobile waste catalysts Group metals are very important and have huge recovery value. At present, there are two processes for recovering platinum group metals from spent auto catalysts: wet method and pyrolysis method. [0003] The wet process generally uses acid to leach the platinum group metal active components in the spent auto catalyst to separate the platinum gro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B11/02
CPCY02P10/20
Inventor 李勇贺小塘韩守礼赵雨吴喜龙王欢郭俊梅刘文李红梅谭明亮顾华祥姚禹王华
Owner GUIYAN RESOURCE YIMEN
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