Method for recovering noble metals from spent auto-catalyst

A technology for auto catalysts and precious metals, which is applied in the field of comprehensive utilization of exhausted auto catalyst resources, can solve the problems of difficulty, complexity, and high impurity content in the treatment of spent auto exhaust catalysts, and achieve low production costs, low energy consumption, and high enrichment multiples Effect

Active Publication Date: 2014-10-01
GUIYAN RESOURCE YIMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large difference in raw material composition, high and complex impurity content, it is difficult to treat the waste catalyst of automobile exhaust

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Cordierite (2MgO 2Al 2 o 3 ·5SiO2 2 ) as the carrier of the spent autocatalyst into the spent autocatalyst sampling system, ball milled to a particle size range of 0.074-0.59mm, mixed evenly, sampling and analysis, the precious metal content is: platinum content is 680 g / ton, palladium content is 1200 g / ton tons, the rhodium content is 320 g / t, and the total content of platinum, palladium and rhodium is 2200 g / t; Fe in magnetite 3 o 4 The content range of C is 95-98%, and the magnetite is crushed to a particle size range of 0.3-0.6mm; the C content range of metallurgical coke is 90-93%, and the metallurgical coke is crushed to a particle size range of 0.1-2mm; The CaO content ranges from 96-99%, and the lime is crushed to a particle size range of 0.5-1mm; CaF in fluorite ore 2 The content range is 65-80%, and the fluorite ore is crushed to a particle size range of 1-3mm.

[0031] (2) Put 4,000kg of pre-treated materials into the exhausted automobile catalys...

Embodiment 2

[0035] (1) Cordierite (2MgO 2Al 2 o 3 ·5SiO2 2 ) as the carrier of the exhausted autocatalyst into the exhausted autocatalyst sampling system, ball milled to a particle size range of 0.074-0.59mm, mixed evenly, sampling and analysis, the precious metal content is respectively: platinum content is 620 g / ton, palladium content is 1450 g / ton tons, the rhodium content is 220 g / t, and the total content of platinum, palladium and rhodium is 2290 g / t; Fe in magnetite 3 o 4 The content range of C is 95-98%, and the magnetite is crushed to a particle size range of 0.3-0.6mm; the C content range of metallurgical coke is 90-93%, and the metallurgical coke is crushed to a particle size range of 0.1-2mm; The CaO content ranges from 96-99%, and the lime is crushed to a particle size range of 0.5-1mm; CaF in fluorite ore 2 The content range is 65-80%, and the fluorite ore is crushed to a particle size range of 1-3mm.

[0036] (2) Put 3000kg of pre-treated materials out of use auto c...

Embodiment 3

[0040] (1) Cordierite (2MgO 2Al 2 o 3 ·5SiO2 2 ) as the carrier of the exhausted autocatalyst into the exhausted autocatalyst sampling system, ball milled to a particle size range of 0.074-0.59mm, mixed evenly, sampling and analysis, the precious metal content is respectively: platinum content is 860 g / ton, palladium content is 1700 g / tons, the rhodium content is 410 g / t, and the total content of platinum, palladium and rhodium is 2970 g / t; Fe in magnetite 3 o 4 The content range of C is 95-98%, and the magnetite is crushed to a particle size range of 0.3-0.6mm; the C content range of metallurgical coke is 90-93%, and the metallurgical coke is crushed to a particle size range of 0.1-2mm; The CaO content ranges from 96-99%, and the lime is crushed to a particle size range of 0.5-1mm; CaF in fluorite ore 2 The content range is 65-80%, and the fluorite ore is crushed to a particle size range of 1-3mm.

[0041] (2) Add 2500kg of pre-treated materials to the exhausted auto...

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PUM

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Abstract

The invention discloses a method for recovering noble metals from a spent auto-catalyst. The method comprises the following steps: (1) early treatment of materials; (2) burdening, and mixing, namely mixing the materials processed in the step (1) according to the ratio, wherein the materials comprise 75-85 parts of spent auto-catalyst taking cordierite as a carrier, 2-4 parts of magnetite, 1-3 parts of metallurgical coke, 10-13 parts of lime and 1-3 parts of fluorite mine; (3) processing the obtained materials by adopting a plasma furnace: a, introducing argon of which the purity is 99.99% into the plasma furnace, so as to keep micro negative pressure inside the furnace; b, beginning to feed the materials obtained in the step (2) to the plasma furnace when the temperature inside the plasma furnace is within the range of 1500-1600 DEG C; c, beginning to discharge slag from a slag phase discharge hole after smelting for 3-6 hours, d, carrying out heat preservation at 1600-1650 DEG C for 30 minutes after charging the materials obtained in the step (2), and then opening the metal phase discharge hole, so as to obtain alloy containing noble metals. By adopting the method, the total yield of platinum, palladium and rhodium is greater than 98%, the recovery rate of platinum is greater than 98%, the recovery rate of palladium is greater than 98%, and the recovery rate of rhodium is greater than 97%.

Description

Technical field [0001] The invention involves the field of comprehensive utilization of failed vehicle catalyst resources, especially the method of enriching precious metals with plasma melting technology. Background technique [0002] Due to the purification capacity of precious metal platinum pheasants on the tail gas, more than 60%of platinum, 钯, and 铑 are used to produce car catalysts every year.In 2011, the amount of platinum in global car catalysts reached 96.6 tons, 187.6 tons, and 22.1 tons. The platinum recovered from failure car catalyst was 38.1 tons, 51.5 tons, and 8.7 tons.Although many institutions are studying new catalysts to replace or reduce the amount of precious metals, as the number of cars increases and the environmental protection standards increase, the demand for precious metals will further increase. [0003] There are many types of car tail gas catalysts. The earliest one was granular catalyst with γ-Al2O3 as the carrier. Now the most commonly used hone...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/00C22B11/00
CPCY02P10/20
Inventor 贺小塘李勇王欢韩守礼郭俊梅赵雨吴喜龙谭文进李锟肖雄刘伟李子璇陈晓
Owner GUIYAN RESOURCE YIMEN
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