Comprehensive recovery method for multi-metal from dead catalyst

A waste catalyst and multi-metal technology, which is applied in the field of catalyst secondary resource recovery, can solve the problems of discarded renewable resources, difficulty in recycling, low resource recovery rate, etc., and achieve the effects of energy saving, process and cost saving, and wide adaptability

Active Publication Date: 2013-09-11
BEIJING GENERAL RES INST OF MINING & METALLURGY +1
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  • Application Information

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Problems solved by technology

[0010] Generally speaking, the above methods have a low resource recovery rate, and the phenomenon o

Method used

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  • Comprehensive recovery method for multi-metal from dead catalyst

Examples

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Example Embodiment

[0041] Example 1:

[0042] Take 1000g of high nickel catalyst from a petrochemical plant, and use sulfuric acid with a liquid-solid ratio of 5:1 and 100g / L in the stirred mill. The prepreg residue is matured by adding concentrated sulfuric acid. The acid mass ratio of the residue is 4:1. The temperature is 106℃, and the curing time is 48h. The matured residue is leached with a prepreg, the leaching temperature is 80℃, and the leaching time is 4h. After pre-soaking and aging water leaching, the leaching rate of vanadium was 88.0%, and that of aluminum was 9.3%. The obtained leaching slag is mixed with silica and reduced iron powder and smelted at 1350°C for 2 hours to obtain the matte phase and the slag item. The matte incorporation rates of nickel, cobalt, and molybdenum are 90%, 89%, and 82%, respectively. The matte phase obtains nickel, cobalt, and molybdenum products according to conventional metallurgical methods.

Example Embodiment

[0043] Example 2:

[0044] Take 1000g of high-cobalt waste catalyst from a petrochemical company. The vanadium content in this catalyst is very low and has no recycling value. Therefore, it is directly pyro-smelted. According to the specific composition of the catalyst, 280g silica and 420g reduced iron powder are added. After smelting at 1350℃ for 2h, the matte phase and slag phase are obtained. The matte incorporation rates of nickel, cobalt and molybdenum are 94%, 95%, and 79% respectively. The matte phase obtains nickel, cobalt, and molybdenum products according to conventional metallurgical methods.

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Abstract

The invention discloses a comprehensive recovery method for multi-metal from a dead catalyst. The method comprises the following steps that: the dead catalyst is presoaked in dilute sulfuric acid and ground; the presoaked dregs are cured with concentrated sulfuric acid; the cured material is leached with water or a presoaking solution, wherein in the whole selective vanadium extraction process, the leaching rate of vanadium is larger than 85%, and the leaching rate of aluminum is lower than 10%; after the vanadium extraction, the dregs are mixed with an appropriate fusing agent for pyrometallurgical smelting, thus separating valuable metals of nickel, cobalt, molybdenum and the like from impurities of aluminum, silicon and the like. After acid leaching under pressure, nickel, cobalt and molybdenum in the pyrometallurgical smelting process can be further separated, and molybdenum can be recovered by ammonia leaching. The process has the beneficial effects that vanadium is recovered by the selective leaching method, thus avoiding separation of vanadium and aluminum; in the pyrometallurgical smelting process, the calorific value of residual organisms in the dead catalyst is fully used, thus reducing energy consumption, avoiding aluminum leaching in a traditional process, and reducing leaching agent consumption.

Description

technical field [0001] The invention belongs to the technical field of recovery of catalyst secondary resources, and in particular relates to a method for comprehensive recovery and utilization of spent catalysts and multiple metals. Background technique [0002] Vanadium, molybdenum, tungsten and other metals are often called refractory metals. It has good ductility, hard quality, resistance to hydrochloric acid and sulfuric acid, and better resistance to gas-salt-water corrosion than most stainless steels. At the same time, because these metals have variable valence states, they are rare in the chemical industry. catalyst raw materials. Therefore, these elements are widely used in metallurgy, chemical industry, and steel industry. With the rapid development of my country's modernization, the demand for such metals is increasing. [0003] Nickel is a ferromagnetic metallic element that is highly polished and corrosion resistant. Mainly used in alloys (such as nickel ste...

Claims

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Application Information

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IPC IPC(8): C22B7/00
CPCY02P10/20
Inventor 王成彦尹飞居中军陈永强阮书锋杨永强揭晓武杨卜马保中张永禄邢鹏郜伟李强袁文辉杨玮娇
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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