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Comprehensive treatment method for applying sodium-containing ammonium waste liquid to laterite nickel ore

A laterite nickel ore and comprehensive treatment technology, applied in the field of metallurgy, can solve the problems of high treatment costs, achieve the effects of reducing treatment costs, ensuring safe production, and avoiding spontaneous combustion

Active Publication Date: 2020-05-05
JINGMEN GEM NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a comprehensive treatment method for sodium-ammonium-containing waste liquid applied to laterite nickel ore, which is used to solve the safety risk of oxygen autoclave in the prior art when laterite nickel ore is subjected to oxygen pressure leaching, and the treatment cost is relatively high The problem

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  • Comprehensive treatment method for applying sodium-containing ammonium waste liquid to laterite nickel ore

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Take 60L of saprolite ball mill slurry with a solid content of 33.5% and a 200-mesh screening rate of 97%, add 31.2kg of concentrated sulfuric acid, stir and react at 70°C for 2 hours to obtain a prepreg, and then place the prepreg in an oxygen autoclave for Oxygen pressure leaching, the total pressure is 1.2MPa, the leaching temperature is 180°C, and the leaching time is 2h, the nickel leaching rate is 95.96%, the impurity element iron: 7.16g / L, aluminum: 3.57g / L leach solution.

[0027] Add 35g / L of sodium sulfate and 20g / L of ammonium sulfate containing sodium ammonium waste liquid, and add calcium hydroxide to adjust the pH to 2.0, filter to remove the slag, and add 30% liquid caustic soda slurry to part of the neutralization solution to adjust pH to 5.0, filter to remove iron and aluminum slag, obtain impurity-removed liquid. Add liquid caustic soda to the impurity-removed liquid to adjust the pH to 8.0, stir and react for 6 hours, and obtain the nickel hydroxide c...

Embodiment 2

[0029]Take 60L of limonite ball mill slurry with a solid content of 33.5% and a 200-mesh sieving rate of 97%, add 32kg of concentrated sulfuric acid, stir and react at 80°C for 4 hours to obtain a prepreg, and then place the prepreg in an oxygen autoclave for Oxygen pressure leaching, the total pressure is 1.8MPa, the leaching temperature is 180°C, and the leaching time is 2h, the nickel leaching rate is 96.35%, the impurity element iron: 5.98g / L, aluminum: 2.57g / L leaching solution.

[0030] Add 35g / L of sodium sulfate and 20g / L of ammonium sulfate containing sodium ammonium waste liquid, and add calcium carbonate to adjust the pH to 2.0, filter to remove residue, add 15% calcium carbonate to part of the neutralization solution to adjust the pH to 4.8, filter The iron and aluminum slag is removed to obtain the impurity-removed liquid. Calcium oxide is added to the impurity-removed liquid to adjust the pH to 8.0, and the reaction is stirred for 6 hours to obtain the nickel hyd...

Embodiment 3

[0032] Take 60L of limonite ball mill slurry with a solid content of 33.5% and a 200-mesh sieving rate of 97%, add 32kg of concentrated sulfuric acid, stir and react at 90°C for 4 hours to obtain a prepreg, and then place the prepreg in an oxygen autoclave for Oxygen pressure leaching, the total pressure is 1.8MPa, the leaching temperature is 200°C, and the leaching time is 2h, the nickel leaching rate is 98.35%, the impurity element iron: 4.5g / L, aluminum: 0.57g / L leach solution.

[0033] Add sodium sulfate 20g / L, ammonium sulfate 8g / L sodium ammonium containing waste liquid, and add calcium carbonate to adjust the pH to 2.0, filter to remove residue, add 15% calcium carbonate to part of the neutralization solution to adjust the pH to 4.8, filter The iron and aluminum slag is removed to obtain the impurity-removed liquid. Magnesium oxide is then added to the impurity-removed liquid to adjust the pH to 7.8, and the reaction is stirred for 6 hours to obtain the nickel hydroxide...

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Abstract

The invention discloses a comprehensive treatment method for applying sodium-containing ammonium waste liquid to laterite nickel ore. The comprehensive treatment method comprises the steps of ore matching presoaking, oxygen pressure leaching, partial neutralizing, precipitating impurity removing and alkaline precipitating of nickel, cobalt and manganese, wherein the step of the partial neutralizing specifically comprises the steps that the sodium-containing ammonium waste liquid is firstly added in leaching liquid obtained after the step of the oxygen pressure leaching, and then a first neutralizer is added in till the PH value is 1.0-2.5 to obtain partial neutralizing liquid. According to the comprehensive treatment method for applying the sodium-containing ammonium waste liquid to the laterite nickel ore, by means of the manner that the sodium-containing ammonium waste liquid is added in after reaction leaching is performed through an oxygen pressure kettle, on the basis of guaranteeing the high leaching rate of nickel, cobalt and manganese, combustion of the titanium oxygen pressure kettle caused by the sodium-containing ammonium waste liquid being provided with organic matter is avoided, and safe production is guaranteed; and meanwhile, the comprehensive treatment method performs reasonable recycling on the sodium-containing ammonium waste liquid difficult to use in industrial production, and the treatment cost of the laterite nickel ore is significantly reduced.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a comprehensive treatment method for applying sodium ammonium-containing waste liquid to laterite nickel ore. Background technique [0002] At present, nickel minerals mainly exist in two forms of nickel sulfide ore and nickel oxide ore, of which nickel sulfide ore accounts for about 40% and oxide ore accounts for 60%, while the development and utilization of nickel oxide minerals are mainly based on laterite nickel ore. For the ore-forming distribution of lateritic nickel ore, there are three ore layers in sequence from the shallow surface layer to the underground layer: laterite nickel ore layer, limonite layer and saprolite layer. As the surface gradually deepens, the nickel content gradually increases. Distribution trend of decreasing iron content components. [0003] In the prior art, laterite nickel ore is often treated by hydrometallurgy. The specific methods include a...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B3/44C22B23/00C22B47/00
CPCC22B3/08C22B3/44C22B23/043C22B23/0461C22B47/00Y02P10/20
Inventor 许开华蒋振康李琴香王强张坤王文杰
Owner JINGMEN GEM NEW MATERIAL