Method for preparing nickel sulfide concentrate through titanium dioxide waste acids

A technology of titanium white waste acid and nickel sulfide concentrate, which is applied in the direction of improving process efficiency, can solve the problems of a large number of equipment, difficulty in removing iron, and large investment, and achieve the effects of low production cost, reduced leaching, and reduced iron content

Inactive Publication Date: 2013-02-27
ALFA FULL GUANGXI TENG COUNTY TITANIUM DIOXIDE
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Problems solved by technology

The above patents can successfully apply titanium white waste acid to the smelting of precious metals, creating considerable economic value, but there are also shortcomings. For example, some products must be purified and removed from titanium white waste acid before application, and the ore There are a lot of iron elements, and the copper sulfate, zinc sulfate, manganese sulfate, etc. produced by the waste acid reaction are also soluble in water like iron sulfate, and it is difficult to remove iron. The cost of separating and purifying copper sulfate, zinc sulfate, and manganese sulfate is very high. In addition, a large amount of equipment is required, and the investment is large. Subsequent production will also produce waste sulfuric acid, which also faces the problem of reprocessing waste acid.

Method used

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  • Method for preparing nickel sulfide concentrate through titanium dioxide waste acids

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Effect test

Embodiment 1

[0020] Embodiment 1 (the content of all acid and nickel in the embodiment is weight content)

[0021] 1000Kg of laterite nickel, add 3500Kg of 22% titanium white waste acid, start 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, add sodium hydroxide to adjust pH = 4.2, blow into Compress 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 280Kg powdered ferrous sulfide, keep warm for 3 hours, cool down to 50°C, filter, and the filter residue is It is a nickel sulfide concentrate with a nickel content of 11.5%.

Embodiment 2

[0023] 1000Kg of laterite nickel, add 5200Kg of 15% titanium white waste acid, start stirring to make a slurry, raise the temperature to 80°C, stir and extract at normal pressure for 60 minutes, add 100Kg of potassium chloride solid, add sodium hydroxide to adjust pH = 3.0, blow Add compressed air, continue to react for 2 hours, filter, put the filtrate into the reactor, heat to 90°C under stirring, add 300Kg powdered calcium sulfide, keep warm for 3 hours, cool down to 50°C, filter, and the filter residue is nickel sulfide concentrate , the nickel content is 8.3%.

Embodiment 3

[0025] 1000Kg of laterite nickel, add 5200Kg of 18% titanium white waste acid, turn on the stirring to make a slurry, raise the temperature 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 into Compress the air, continue to react for 2 hours, filter, put the filtrate into the reactor, heat to 90°C under stirring, add 300Kg powdered ammonium sulfide and ammonium disulfide, keep the temperature down to 50°C after 3 hours of heat preservation reaction, filter, and the filter residue is sulfide Nickel concentrate with a nickel content of 13.1%.

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PUM

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Abstract

The invention provides a method for preparing nickel sulfide concentrate through titanium dioxide waste acids. The specific technical scheme includes that waste acids produced in the nickel sulfide industry are used for immersing nickel laterite ore, assistants are added after warming, agitation and digestion are performed for a certain time, compressed air or oxygen is blown in, filtration is performed after a certain period, a vulcanizing agent is added after the filtration solution is heated to a designated temperature, and filtration is performed again after agitation and heat preservation are performed for a certain period to obtain the nickel sulfide concentrate. The method is an effective way to use titanium dioxide waste acids comprehensively, wastes are turned into treasures, the cost used by a wet process to process metallic nickel can be reduced, air pollution is reduced, and good economic benefits can be produced.

Description

technical field [0001] The invention provides a method for preparing nickel sulfide concentrate from titanium white waste acid, which belongs to the field of comprehensive utilization of industrial waste acid and hydrometallurgy. Background technique [0002] Titanium dioxide is widely used in coatings, plastics, inks, papermaking, cosmetics and other fields, and is an important chemical raw material at home and abroad. At present, most of the nearly 100 titanium dioxide factories in my country use the sulfuric acid method for production. According to statistics, this production process will produce 8-10 tons of 20% waste acid for every 1 ton of titanium dioxide produced. If such a large amount of waste acid is discharged directly, it will seriously pollute the environment, so the waste acid must be treated to meet the standard before it can be discharged. [0003] At present, there are a large number of documents and patents reporting methods for the treatment and recyclin...

Claims

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Application Information

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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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