A method for pyro-reduction smelting bismuth to enrich platinum group metals in waste automobile exhaust catalysts

An auto catalyst and platinum group metal technology, applied in the direction of improving process efficiency, can solve the problems of not being well suited for platinum group metal enrichment treatment and high smelting temperature, so as to reduce the difficulty of separation and recovery, eliminate low recovery rate, Good enrichment effect
CN110735045BActive Publication Date: 2021-07-30ANHUI UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ANHUI UNIVERSITY OF TECHNOLOGY
Publication Date
2021-07-30

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Abstract

The invention discloses a method for enriching platinum group metals in waste automobile exhaust catalysts by pyro-reduction smelting bismuth, which belongs to the field of rare metal smelting. The process steps include batching, primary smelting and capturing and secondary smelting and capturing. In the present invention, metal bismuth is used as a trapping agent to smelt and trap platinum, palladium and rhodium in waste automobile exhaust catalysts, and the specific process is optimized to design the platinum, palladium and rhodium in waste automobile exhaust catalysts. Metals are captured more effectively, which improves the recovery rate of platinum group metals and metal bismuth, and also solves the difficulties in the separation of base metals in the traditional copper, lead, iron and other capture methods, the high toxicity of the collector, and the smelting temperature. Higher disadvantages eliminate the defect of low recovery rate caused by catalyst carrier wrapping platinum group metals, reduce the difficulty of separation and recovery of platinum group metals in catalysts, and its process flow is short, enrichment effect is good, environmental protection, non-toxic, low cost, and wide application Good prospects.
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Description

technical field

[0001] The invention belongs to the field of rare metal smelting, and more specifically relates to a method for enriching platinum group metals in waste automobile exhaust catalysts by pyro-reduction smelting bismuth. Background technique

[0002] my country's platinum group metal mineral resources are extremely poor, and the prospective reserves are only about 350t, which does not exceed 0.5% of the world's total reserves. However, my country is a big consumer of platinum group metals in the world. In 2017, the consumption of platinum and palladium reached 63.8t and 82.6t respectively, which are mainly used in the field of automobile exhaust catalysts. Automobile exhaust catalysts are called "urban mobile platinum group metal mines". . Carrying out the efficient utilization of secondary resources and comprehensive recovery of platinum group metals is of great significance to solving the serious shortage of platinum group metal mineral resources in my country...

Claims

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