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Method for producing nickel sulfide ore concentrate by use of industrial waste acid

A technology of industrial waste acid and nickel sulfide refined, applied in the direction of improving process efficiency, can solve the problems of reducing the utilization rate of sulfur ions, increasing labor intensity, large equipment investment, etc., to protect the workshop and atmospheric environment, and low production costs , the effect of reducing energy consumption

Active Publication Date: 2013-03-27
ALFA FULL GUANGXI TENG COUNTY TITANIUM DIOXIDE
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AI Technical Summary

Problems solved by technology

The above method adopts the normal pressure acid leaching laterite nickel ore method to produce nickel sulfide concentrate, which has made great progress compared with the high pressure acid leaching method, and the cost is relatively low, but there are also deficiencies, such as: 1. The precipitation step adopts Simple precipitants such as sodium sulfide, potassium sulfide, etc. will produce a large amount of hydrogen sulfide gas that pollutes the environment and reduce the utilization rate of sulfide ions, resulting in a large amount of sulfide added and higher costs
2. The acid leaching uses ordinary industrial inorganic acid, and the cost is relatively high. 3. Laterite ore contains a large amount of iron elements, and the acid leaching solution contains ferric sulfate, ferrous sulfate, nickel sulfate, etc., which are easily soluble in water. Iron removal is very troublesome
Concentrated acid leaching solution is used to achieve the purpose of precipitation of ferric sulfate and ferrous sulfate crystals to remove iron. The investment in equipment is large, the energy consumption is high, and the increase in procedures leads to increased labor intensity.

Method used

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  • Method for producing nickel sulfide ore concentrate by use of industrial waste acid

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Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1 (the content of all acid and nickel in the embodiment is weight content)

[0024] 1000Kg of laterite nickel, add 3300Kg of titanium white waste acid containing 21% acid, turn on the stirring to make a slurry, raise the temperature to 80°C, stir and extract at normal pressure for 45 minutes, add 150Kg of sodium sulfate solid, and add sodium hydroxide to adjust pH=4.2 , blow in compressed air, continue to react for 1.5 hours, cool down to 40°C and filter, put the filtrate into the reactor, heat to 80°C under stirring, add 200Kg powdered ferrous sulfide, keep the temperature for 3 hours, cool down to 50°C, filter , the filter residue is nickel sulfide concentrate with a nickel content of 11.0%.

Embodiment 2

[0026] 1000Kg laterite nickel, add 4000Kg electrolytic copper industrial waste acid containing 18% sulfuric acid, start stirring to make a slurry, heat up to 80°C, stir and extract at normal pressure for 60 minutes, add 100Kg potassium chloride solid, add sodium hydroxide to adjust pH =3.0, blow in compressed air, continue to react for 2 hours, filter, put the filtrate into the reactor, heat to 90°C under stirring, add 160Kg powdered calcium sulfide, keep warm for 3 hours, cool down to 50°C, filter, and the filter residue is Nickel sulphide concentrate with a nickel content of 12.1%.

Embodiment 3

[0028] 1000Kg of laterite nickel, add 6300Kg of waste acid produced by cleaning iron and steel products with a concentration of 15%, start stirring to make a slurry, heat up to 80°C, stir and extract at normal pressure for 60 minutes, add 100Kg of ammonium sulfate solid, add sodium hydroxide to adjust pH = 3.0, blow in compressed air, continue to react for 2 hours, filter, put the filtrate into the reactor, heat to 90°C under stirring, add 150Kg powdered 1:1 ammonium sulfide and ammonium polysulfide, keep warm for 4 hours and then cool down to 50°C, filter, and the filter residue is nickel sulfide concentrate, with a nickel content of 10.9%.

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Abstract

The invention provides a method for producing nickel sulfide ore concentrate by the use of industrial waste acid. The specific technical scheme is as follows: adopting industrial waste acid to soak laterite-nickel ore, heating, stirring and extracting, and after a period of time, adding assistant, blowing in compression air or oxygen, reacting for a period of time, filtering, heating filtrate to a required temperature, and then adding vulcanizing agent, stirring, keeping the temperature for a period of time, and filtering to obtain the nickel sulfide ore concentrate. The method is an effective way for comprehensively utilizing the industrial waste acid to change waste into wealth, thereby reducing the cost for producing nickel sulfide ore by hydrometallurgical process, lowering air pollution and having a good economic benefit.

Description

technical field [0001] The invention provides a method for preparing nickel sulfide concentrate from industrial waste acid, which belongs to the field of comprehensive utilization of industrial waste acid and hydrometallurgy of metal nickel. Background technique [0002] Production of titanium dioxide by sulfuric acid method, wet copper smelting industry, electroplating industry, steel and its products, cleaning of machinery and other industries all produce a large amount of waste acid. If these waste acids are not treated and discharged directly, they will cause great damage to the environment. In order to deal with waste acid and reduce its harm to the environment, people have come up with many feasible methods. Among them, neutralization discharge is a relatively simple method. Neutralization discharge refers to adding a neutralizer such as lime or calcium carbonate to the waste acid to neutralize the waste acid, so that the pH value of the waste liquid reaches or is clos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06C22B23/00
CPCY02P10/20
Inventor 容小邕梁兴泉
Owner ALFA FULL GUANGXI TENG COUNTY TITANIUM DIOXIDE
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