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Process for extracting precious metals by high-aluminum petroleum catalyst silver capture

A catalyst and precious metal technology, which is applied in the field of high-aluminum petroleum catalyst silver capture and extraction of precious metals, can solve the problems of low wet reprocessing yield, high precious metal loss, and high smelting temperature, so as to improve the processing scale and precious metal recovery rate, reduce Difficulty of fire treatment, effect of improving trapping effect

Active Publication Date: 2020-01-14
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after wet treatment of high-grade catalysts, the insoluble slag still contains a small amount of precious metals that have not been recovered. In addition, some types of platinum group metal catalysts contain low precious metals. The grades of precious metals in the above two materials are all in the range of 100-500g. In the range of / t, the content of precious metals is low, the content of alumina is relatively high, the yield of wet reprocessing is low, and the recovery of precious metals is still not complete; Large, it needs to introduce a large amount of flux, the smelting output is large, and the loss of precious metals is large. In addition, the difficulty in the recovery of rhodium-containing catalysts by fire method is that the collection effect of rhodium is not good.

Method used

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  • Process for extracting precious metals by high-aluminum petroleum catalyst silver capture
  • Process for extracting precious metals by high-aluminum petroleum catalyst silver capture
  • Process for extracting precious metals by high-aluminum petroleum catalyst silver capture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]Dry the petroleum catalyst containing precious metals, with a water content of 2.7%. Mix the above catalyst with the pretreated copper anode slime at a mass ratio of 1:8. If the aluminum content in the catalyst fluctuates, control the alumina content in the mixed material. If it exceeds 6%, add 4% silicon dioxide, 5% pulverized coal reducing agent, and 6% sodium carbonate. At a temperature of 1250°C, smelt and reduce for 0.5h. After standing for 1h, remove the smelting slag. After removing the slag, add a theoretical amount of silicon dioxide to remove lead according to the amount of lead in the resulting lead silicate, melt and react at 1250°C for 2 hours, and then remove the lead smelting slag after standing for 0.5 hours; Calculation of tellurium Add a theoretical amount of sodium carbonate to remove tellurium, melt and react at 1250°C for 2 hours, let it stand for 0.5 hours and blow off the tellurium slag; then calculate the amount of potassium nitrate and silicon dio...

Embodiment 2

[0040] Dry the petroleum catalyst containing precious metals, the water content is 2%, and mix the above catalyst with the pretreated copper anode slime at a mass ratio of 1:10. If the aluminum content in the catalyst fluctuates, control the alumina content in the mixed material. If it exceeds 6%, add 6% silicon dioxide, 7% pulverized coal reducing agent, and 8% sodium carbonate. At a temperature of 1250°C, smelt and reduce for 1 hour, and then remove the smelting slag after standing for 2 hours. After removing the slag, add a theoretical amount of silicon dioxide to remove lead according to the amount of lead in the resulting lead silicate, melt and react at 1300°C for 3 hours, and then remove the lead smelting slag after standing for 1 hour; Calculate and add a theoretical amount of sodium carbonate to remove tellurium, melt and react at 1300°C for 3 hours, let stand for 1 hour and blow off tellurium slag; then calculate the amount of potassium nitrate and silicon dioxide req...

Embodiment 3

[0048] Dry the petroleum catalyst containing precious metals, the moisture content is 2.5%, mix the above catalyst with the pretreated copper anode slime according to the mass ratio of 1:8, if the aluminum content in the catalyst fluctuates, control the alumina content in the mixed material No more than 6%, then add 5% silicon dioxide, 6% pulverized coal reducing agent, and 7% sodium carbonate. At a temperature of 1250°C, smelt and reduce for 0.9h. After standing for 2h, remove the smelting slag. After removing the slag, add a theoretical amount of silicon dioxide to remove lead according to the amount of lead in the resulting lead silicate, melt and react at 1250°C for 2.5 hours, and then remove the lead smelting slag after standing for 0.9 hours; In the calculation of tellurium, add a theoretical amount of sodium carbonate to remove tellurium, melt and react at 1250°C for 2.5 hours, and then blow off tellurium slag after standing for 0.9 hours; then calculate the amount of po...

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Abstract

The invention discloses a process for extracting precious metals by high-aluminum petroleum catalyst silver capture. The process comprises the following steps of catalyst pre-treating, producing gold-silver alloy by blowing, electrolyzing the gold-silver alloy, extracting gold from silver anode mud, extracting and separating platinum and palladium, and platinum refining. According to the process,pretreated copper anode mud is used as a material, namely, the furnace material of a Kaldo furnace is matched with a high-aluminum petroleum catalyst for smelting, the technical basis that the meltingpoint of lead oxide during slagging is low, matching treatment is carried out, and the relative content of aluminum oxide is reduced is utilized, the melting temperature is reduced, the fluidity of molten slag is improved, the treatment scale and the precious metal recovery rate of the high-aluminum petroleum catalyst are improved, and the purpose of thoroughly recovering precious metals is achieved, so that the difficulty of high-aluminum catalyst pyrogenic attack can be effectively reduced, low-grade high-aluminum catalysts can be processed on a large scale, by utilizing silver in the copper anode mud, the capture effect of the platinum and the palladium is improved, and the recovery rates of gold, the silver, the palladium and the platinum can be greater than 96% by utilizing the process steps of the process.

Description

technical field [0001] The invention belongs to the field of metallurgical technology, and in particular relates to a technology for collecting and extracting precious metals by collecting silver with high-alumina petroleum catalysts. Background technique [0002] Platinum group metal catalysts are widely used in the biological, automotive, chemical and petroleum industries, especially in the petroleum industry, due to their advantages such as high catalytic efficiency, good selectivity, wide application temperature, uniform catalysis, and durability. With the rapid development of the national economy and the development of the domestic oil refining industry towards "deep and refined" processing, the amount of platinum group metal catalysts in the petroleum industry continues to increase. The life cycle of the catalyst is only 2-3 years, and the accompanying waste catalyst will increase year by year. Therefore, the recovery of precious metals from spent catalysts is of grea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B5/10C25C5/04C22B11/00C22B3/34
CPCC22B5/10C22B7/001C22B7/006C22B11/026C22B11/048C25C5/04C22B3/34Y02P10/20
Inventor 王立季婷周鹤立曹杰义李睿杜彦君徐鹏
Owner JINCHUAN GROUP LIMITED