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Method for recovering nickel and aluminum from waste aluminum based nickel-containing catalyst

A nickel catalyst and aluminum-based technology is applied in the field of recovering nickel and aluminum from waste aluminum-based nickel-containing catalysts, and can solve the problems of unutilized, difficult filtration, and unsuitable for smelting and trapping treatment.

Inactive Publication Date: 2004-11-10
SHENYANG JIAHE METALLURGICAL FURNACE CHARGE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this kind of catalyst and its waste residue are treated by acid and alkali direct leaching process, the effect is not ideal.
Al of the former 2 o 3 The leaching rate is not high, and it will cause nickel to disperse in the solution, failing to achieve the purpose of separating nickel and aluminum; although the latter nickel does not enter the alkaline solution, Al 2 o 3 The dissolution rate of the same is less than 50%, and the SiO in the raw material 2 , easy to form aluminosilicates with low solubility (Na 2 O·Al 2 o 3 2SiO2 2 2H 2 O) scaling on the inner wall of the equipment, and difficult to filter
Since the raw material contains up to 60% to 80% Al 2 o 3 It is also not suitable for direct treatment by smelting and trapping. Plasma smelting is used to smelt such waste catalyst or waste slag at a high temperature above 1500°C. Although nickel-iron alloys can be obtained, due to the low grade of raw materials and high energy consumption per unit of product, the substrate Al 2 o 3 also not available

Method used

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  • Method for recovering nickel and aluminum from waste aluminum based nickel-containing catalyst

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Experimental program
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Effect test

Embodiment 1

[0057] Φ16×Φ6mm tile-gray Raschig ring-shaped waste catalyst crushed material 1000g, content α-Al 2 o 3 49.20%, Ni11.40% (NiO14.5%), SiO 2 2.0%, CaO14.80%; (1) at temperature 1100 ℃~1150 ℃, spent catalyst: sodium carbonate (weight ratio)=1: 1 condition, in SX 2 -12-10 sintering reaction in a box-type resistance furnace for 3 hours to obtain 1787 grams of sintered material, with a yield of 85.10%; (2) dissolve the sintered material with boiling water, and the ratio of the weight of the sintered material in grams to the volume of boiling water in milliliters is 1 : 4, the temperature is the boiling temperature of water, and the time is 1 hour. The nickel slag is washed with hot water for 2 times and then dried. The nickel slag weighs 472 grams, the grade Ni24.12%, Al 2 o 3 20.92%; based on nickel slag composition, Al 2 o 3 The dissolution rate is 79.93%, and nickel enrichment is 2.1 times.

Embodiment 2

[0059] 200 kg of light blue waste residue after extracting molybdenum and vanadium from spent catalyst containing nickel, aluminum, molybdenum and vanadium, content Al 2 o 3 64.96%, Ni4.64% (NiO5.89%), V 2 o 5 1.50%, MoO 3 0.20%, SiO 2 1.5%, Na 2 O and Fe 2 o 3 Trace; (1) waste slag is oven dry, and the powder after pulverizing is sintered in 5 batches in the aforementioned coal-fired heating furnace, 40 kilograms of feeding intake each time, temperature 1000 ℃~1050 ℃, waste slag: sodium carbonate (weight ratio )=1:1~1.25, sintering reaction 4~6 hours, obtain 336.4 kilograms of sintered material altogether, output rate 82.05%; 40 kg of sintering powder is put in at a time, the weight of sintering material in kilograms and the volume of boiling water in liters are 1:4-6, the temperature is the boiling temperature of water, and the time is 1 hour. The nickel slag is washed twice with hot water in the same proportion. Obtain 72.7 kilograms of nickel slag, its composition ...

Embodiment 3

[0061] Take 1 kg of nickel-rich slag with a nickel grade of 10.83%; use gypsum ore as a vulcanizing agent, containing CaSO 4 2H 2 O87.51%; blowing slag in smelters is used as flux, and its composition is FeO66.23%, SiO 2 23.05%; pulverized coal is used as reducing agent; batching ratio: nickel-rich slag: gypsum ore: blowing slag: pulverized coal=1 kilogram: 0.3 kilogram: 2 kilogram: 0.03 kilogram, with above-mentioned melting and crucible at 1300 ℃~1350 ℃, After smelting for 1.5 hours, 0.367 kg of nickel matte was obtained, the grade was 27.80% Ni, 2.8 kg of slag, containing 0.18% Ni, and the nickel smelting recovery rate was 94.21%.

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Abstract

The invention is a method of recovering nickelic and aluminum from waste aluminum-based nickel catalyst, it has the characters of novel technique, reasonable flow, simple and convenient method and easy operation, and convenient scaled production, and benefits environmental protection. It includes the steps: sodium carbonate sintering and state-changing--boiling water dissolving sodium aluminate and separating aluminum--- making reducing-matte-making melting on nickel residues to obtain nickel matte Ni3S2-FeS-Ni-Fe alloy or copper-nickel matte Cu2S-Ni3S2-FeS alloy---blowing to obtain high-grade nickel matte Ni3S2 or high-grade copper-nickel matte Cu2S-Ni3S2-Cu-Ni alloy---desiliconizing crude NaAlO2 solution---making carbonated decomposition to obtain aluminum hydrate Al2O3íñ3H2O---calcining to obtain anhydrous aluminum oxide alpha-Al2O3. It is suitable to recover nickel and aluminum from the waste residue generated by extracting molybdenum and vanadium from waste aluminum-based nickelic catalysts and disabled catalysts containing nickel, aluminum, molybdenum and vanadium.

Description

Technical field: [0001] The invention relates to the technical field of non-ferrous metal refining, specifically, it relates to a method for recovering nickel and aluminum from waste aluminum-based nickel-containing catalysts. Background technique: [0002] According to statistics, about 500,000 to 700,000 tons of spent catalysts are produced in the world every year, and a large amount of precious metals, non-ferrous metals and their oxides are consumed to manufacture these catalysts. From the perspective of rational utilization of resources and environmental protection, it is necessary to regenerate and recycle spent catalysts so that they can be reused. [0003] Al-based nickel-molybdenum, nickel-cobalt-molybdenum and cobalt-molybdenum catalysts 2 o 3 And active components, widely used in the chemical fertilizer industry. Only my country's current output of various fertilizer catalysts is maintained at about 30,000 tons per year. After the catalyst is used for a long t...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B21/00C22B23/00
CPCY02P10/20
Inventor 杨思增杨茂才田喜林
Owner SHENYANG JIAHE METALLURGICAL FURNACE CHARGE
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