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Spent auto-catalyst assisted recovery method of precious metals

An auto catalyst and precious metal technology, which is applied in the field of cooperative recovery of precious metals from failed auto catalysts, can solve the problems of high energy consumption, large amount of additives and collectors, etc., and achieve the effects of increasing economic benefits, high recovery rate and simple operation.

Active Publication Date: 2018-11-16
GUIYAN RESOURCE YIMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the amount of additives and collectors is large, and energy consumption is large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The method for synergistically recovering precious metals from exhausted automobile catalysts is carried out in sequence as follows:

[0025] A, material preparation and processing: The raw material is an exhausted automobile catalyst, and the palladium content is 800ppm, the platinum is 120ppm, and the rhodium is 80ppm, and its particle size is crushed to 40 orders; the collector is hematite, Fe 2 o 3 The content of C is 75%, and its particle size is crushed to 40 mesh; the synergistic collector is chemically pure tin dioxide powder; the reducing agent is metallurgical coke, and the C content is 80%, and its particle size is crushed to 20 mesh; For industrial lime and ordinary glass, the CaO content in industrial lime is 70%, its particle size is crushed to 20 mesh; for ordinary glass, its particle size is crushed to 20 mesh;

[0026] B, batching, mixing: the material obtained in step A is batched according to the stated mass parts: 5000 grams of spent auto catalyst, ...

Embodiment 2

[0030] The method for synergistically recovering precious metals from exhausted automobile catalysts is carried out in sequence as follows:

[0031] A, material preparation and processing: the raw material is an exhausted automobile catalyst, the content palladium is 1000ppm, the platinum is 180ppm, and the rhodium is 110ppm, and its particle size is crushed to 80 orders; the collector is hematite, Fe 2 o 3 The content of C is 75%, and its particle size is crushed to 60 mesh; the synergistic collector is chemically pure tin dioxide powder; the reducing agent is metallurgical coke, and the C content is 80%, and its particle size is crushed to 40 mesh; For industrial lime and ordinary glass, the CaO content in industrial lime is 70%, and its particle size is crushed to 40 mesh; for ordinary glass, its particle size is crushed to 40 mesh;

[0032] B, batching, batching: the material obtained in step A is batched according to the mass fraction: 5000 grams of exhausted automobile ...

Embodiment 3

[0036] The method for synergistically recovering precious metals from exhausted automobile catalysts is carried out in sequence as follows:

[0037] A, material preparation and processing: the raw material is an exhausted automobile catalyst, the palladium content is 1200ppm, the platinum is 250ppm, and the rhodium is 130ppm, and its particle size is crushed to 100 orders; the collector is hematite, Fe 2 o 3 The content is 70%, and its particle size is crushed to 80 mesh; the synergistic collector is chemically pure tin dioxide and chemically pure antimony trioxide, both in powder form; the reducing agent is metallurgical coke, and the C content is 80%. The particle size is crushed to 60 mesh; the slagging agent is industrial lime and ordinary glass, and the CaO content in industrial lime is 70%, and its particle size is crushed to 60 mesh; for ordinary glass, its particle size is crushed to 60 mesh;

[0038] B, batching, batching: carry out batching with the material obtaine...

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PUM

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Abstract

The invention relates to the field of comprehensive utilization of precious metals secondary resources, specifically to a spent auto-catalyst assisted recovery method of precious metals. The spent auto-catalyst assisted recovery method of precious metals comprises the following steps: A, preparation and treatment of materials; B, burdening and batch mixing; C, melting; and D, slag sampling and analysis. The method has advantages as follows: the recovery rate of precious metals is high; energy is saved and loss is reduced; economic benefit is increased; the operation is simple; and the production process is clean and environmentally-friendly.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of precious metal secondary resources, in particular to a method for synergistically recovering precious metals from exhausted automobile catalysts. Background technique [0002] Due to the unique purification ability of precious metal platinum, palladium and rhodium on automobile exhaust, more than 60% of platinum, palladium and rhodium are used in the production of three-way catalysts for automobiles every year. As of 2016, the number of cars in my country reached 194 million, and 6-7 million cars are scrapped every year. According to the calculation of automobile sales and the service life of autocatalysts from 2001 to 2013, the current amount of expired autocatalysts in the Chinese market is about 1,800 tons per year, and about 3 tons of precious metals can be recovered. Although many institutions are researching new catalysts to replace or reduce the use of precious metals, the use o...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B11/02
CPCC22B7/001C22B11/028Y02P10/20
Inventor 贺小塘王欢赵雨熊庆丰李勇吴喜龙刘文殷耀锋
Owner GUIYAN RESOURCE YIMEN
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