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Method for smelting and trapping platinum and rhenium from spent aluminum-based catalyst

A catalyst and catalyst particle technology, applied in the field of smelting and trapping platinum and rhenium, can solve the problems of serious environmental pollution of waste water and slag, short process flow, low yield, etc., and achieve mature main equipment, broad application prospects and high yield. Effect

Inactive Publication Date: 2021-10-22
KUNMING BOREN PRECIOUS METALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing recovery of platinum group metals from invalid aluminum-based catalysts is mostly a wet process, with short process flow, low yield, and serious environmental pollution of waste water and residue

Method used

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  • Method for smelting and trapping platinum and rhenium from spent aluminum-based catalyst
  • Method for smelting and trapping platinum and rhenium from spent aluminum-based catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 As shown, the embodiment of the present invention provides a method for smelting and trapping platinum and rhenium from spent aluminum-based catalysts, the method comprising the following steps:

[0032] 5kg of the spent aluminum-based catalyst containing platinum was roasted and ball milled to obtain pulverized spent aluminum-based catalyst particles; the roasting temperature was 450°C and the roasting time was 2h.

[0033] The exhausted aluminum-based catalyst particles are uniformly mixed with the trapping agent, the slagging agent and the fluxing agent to obtain the mixed material. Among them, the flux calcium fluoride is 0.3 times that of the invalid aluminum-based catalyst, the flux sodium carbonate and borax are respectively 20% of the weight ratio of the invalid aluminum-based catalyst, and the reducing agent charcoal is 20% of the weight ratio of the invalid aluminum-based catalyst. The addition amount of the collector ferrous sulfate is 2.0 t...

Embodiment 2

[0037] An embodiment of the present invention provides a method for smelting and trapping platinum and rhenium from a spent aluminum-based catalyst, the method comprising the following steps:

[0038] 10 kg of spent aluminum-based catalysts containing platinum were calcined and ball-milled to obtain pulverized spent aluminum-based catalyst particles; the roasting temperature was 500° C., and the roasting time was 3 hours.

[0039] The exhausted aluminum-based catalyst particles are uniformly mixed with the trapping agent, the slagging agent and the fluxing agent to obtain the mixed material. Wherein, the flux calcium fluoride is 0.3 times of the invalid aluminum-based catalyst, the flux sodium carbonate and borax are respectively 20% of the invalid aluminum-based catalyst weight ratio, and the reducing agent charcoal is 20% of the invalid aluminum-based catalyst weight ratio; The amount of iron powder added is 0.2 times the weight ratio of the spent aluminum-based catalyst. T...

Embodiment 3

[0043] An embodiment of the present invention provides a method for smelting and trapping platinum and rhenium from a spent aluminum-based catalyst, the method comprising the following steps:

[0044] 8 kg of spent aluminum-based catalysts containing platinum were roasted and ball milled to obtain pulverized spent aluminum-based catalyst particles; the roasting temperature was 550° C., and the roasting time was 3 hours.

[0045] The exhausted aluminum-based catalyst particles are uniformly mixed with the trapping agent, the slagging agent and the fluxing agent to obtain the mixed material. Wherein, the flux calcium fluoride is 0.3 times of the invalid aluminum-based catalyst, the flux sodium carbonate and borax are respectively 20% of the invalid aluminum-based catalyst weight ratio, and the reducing agent charcoal is 20% of the invalid aluminum-based catalyst weight ratio; The amount of iron powder added is 0.4 times the weight ratio of the spent aluminum-based catalyst. The...

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Abstract

The invention discloses a method for smelting and trapping platinum and rhenium from a spent aluminum-based catalyst. The method comprises the following steps: roasting and ball-milling the spent aluminum-based catalyst containing platinum to obtain crushed spent aluminum-based catalyst particles; uniformly mixing the spent aluminum-based catalyst particles with a trapping agent, a slag former and a fluxing agent to obtain a mixed material; and carrying out reduction iron matte smelting trapping on the mixed material, and obtaining smelting slag and iron matte alloy containing platinum and rhenium respectively. According to the method for smelting and trapping the platinum and the rhenium from the spent aluminum-based catalyst, the yield of the platinum and the rhenium in the iron matte is larger than 99.5% and 85.0% respectively from raw materials to the iron matte. The method has the advantages of simple process, high yield of platinum and rhenium, low cost, subsequent extraction of platinum from the enriched product, reduction of acid consumption, small environmental pollution and the like.

Description

technical field [0001] The invention belongs to the field of rare metal metallurgy and relates to a method for smelting and trapping platinum and rhenium from spent aluminum-based catalysts. Background technique [0002] Platinum-containing rhenium catalysts are mainly used in the petrochemical industry. During use, they will become invalid due to high temperature, combustible gas and other pollution, but the value of platinum itself will not change. High, rare and expensive, so the recovery of platinum from platinum-containing rhenium spent catalysts has very important economic and social significance. [0003] The existing recovery of platinum group metals from invalid aluminum-based catalysts is mostly a wet process, which has a short process flow, low yield, and serious environmental pollution of waste water and residue. It is urgent to develop a low-cost, environmentally friendly and efficient method for capturing platinum-rhenium. Contents of the invention [0004]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/02C22B11/02C22B5/10C22B5/04
CPCC22B7/001C22B1/02C22B11/026C22B5/10C22B5/04C22B7/002Y02P10/20
Inventor 李琰范兴祥李天磊王家和阿洪忠
Owner KUNMING BOREN PRECIOUS METALS
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