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A method for synergistic extraction and separation of iron, cobalt and manganese ions in laterite nickel ore leaching solution

A technology of laterite nickel ore and separation method, applied in the field of hydrometallurgy, can solve the problem of high impurity content and achieve the effect of high metal recovery rate

Active Publication Date: 2020-07-03
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for synergistic extraction and separation of impurities iron, cobalt and manganese ions in the laterite nickel ore leaching solution for the problem of high impurity content in the laterite nickel ore leaching primary solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Prepare the extraction system: mix P204, Cyanex272, tributyl phosphate, and sulfonated kerosene at a volume ratio of 5:15:3:77;

[0018] (2) Homogeneous saponification: Prepare a sodium hydroxide solution with a concentration of 1.0 mol / L and mix it with the extraction system. The saponification rate is 40%. Stir at a speed of 50r / min for 5 min, let stand and separate;

[0019] (3) Synergistic extraction: at a temperature of 20°C and an initial pH of 3.0, mix the saponified extraction system with the nickel sulfate primary solution at a volume ratio of 1:1, stir at a speed of 100 r / min for 5 min, stand for separation, and take water Phase detection of nickel, cobalt, manganese, iron content;

[0020] (4) Nickel stripping: prepare a sulfuric acid solution with a concentration of 0.05mol / L, and mix it with the extraction system after cooperative extraction at a volume ratio of 1:1, stir at a speed of 100r / min for 5 min, stand for separation, and take the water phase ...

Embodiment 2

[0025] (1) Prepare the extraction system: mix P204, Cyanex272, tributyl phosphate, and sulfonated kerosene at a volume ratio of 8:15:5:72;

[0026] (2) Homogeneous saponification: prepare a sodium hydroxide solution with a concentration of 2.0 mol / L and mix it with the extraction system, and the saponification rate is 50%. Stir at a speed of 60r / min for 10 min, let stand and separate;

[0027] (3) Synergistic extraction: at a temperature of 30°C and an initial pH value of 1.0, the saponified extractant and nickel sulfate primary solution were mixed at a volume ratio of 1:1, stirred at a speed of 100 r / min for 10 min, and then separated by standing. Take the water phase to detect the content of nickel, cobalt, manganese and iron;

[0028] (4) Back-extraction of nickel: prepare a sulfuric acid solution with a concentration of 0.3 mol / L, mix it with the extraction system after collaborative extraction at a volume ratio of 1:1, stir at a speed of 100r / min for 10 min, stand for se...

Embodiment 3

[0033] (1) Prepare the extraction system: mix P204, Cyanex272, tributyl phosphate, and sulfonated kerosene in a volume ratio of 10:18:5:67;

[0034] (2) Homogeneous saponification: prepare a sodium hydroxide solution with a concentration of 1.0 mol / L, and mix it with the extraction system, and the saponification rate is 60%; stir at a speed of 80r / min for 5 min, and stand for separation;

[0035] (3) Synergistic extraction: at a temperature of 40°C and an initial pH value of 2.0, the saponified extraction system is mixed with the nickel sulfate primary solution at a volume ratio of 1:1, stirred at a speed of 200r / min for 5 min, left to stand for separation, and water is taken Phase detection of nickel, cobalt, manganese, iron content;

[0036] (4) Nickel stripping: Prepare a sulfuric acid solution with a concentration of 0.4 mol / L, and mix it with the extraction system after cooperative extraction at a volume ratio of 1:1, stir at a speed of 200r / min for 5 min, let stand and s...

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Abstract

The invention discloses a method for extracting and separating impurity iron, cobalt and manganese ions in laterite nickel ore leaching liquid. The extraction agent P204, Cyanex272, TBP and diluent sulfonated kerosene are mixed in a certain proportion to obtain a synergistic extraction system, and the extraction agent is adjusted Ratio, saponification rate, mixing time and other extraction process parameters can obtain a good extraction and separation effect; by adjusting back extraction, the iron, cobalt and manganese in the nickel sulfate primary solution can be effectively removed, so that the iron, cobalt and manganese in the primary nickel sulfate solution The content is reduced to below 0.0001g / L; and a higher metal recovery rate is obtained, which has the potential of industrial application.

Description

technical field [0001] The invention relates to a method for extracting and separating impurity iron, cobalt and manganese ions in a leach solution of laterite nickel ore, and belongs to the technical field of hydrometallurgy. Background technique [0002] China's nickel metal reserves are less than 4% of the world, and the high-grade nickel sulfide ore is almost exhausted. The nickel purification technology of low-grade laterite nickel ore has received extensive attention. After a series of leaching and purification operations using laterite nickel ore as raw material, nickel sulfate primary solution is obtained. Since it contains trace impurities of iron, cobalt and manganese, the contents of the three impurities are 0.035g / L of iron and 0.050g / L of cobalt. , Manganese 0.035g / L. If electrolysis is performed directly, impurity elements will be precipitated at the cathode. In order to ensure the quality of electro-nickel products, it is necessary to carry out advanced puri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/38C22B23/00C22B47/00C21B15/00
CPCC21B15/00C22B23/0453C22B47/00C22B3/408
Inventor 郭勇李亦婧卢晓峰王旭升王磊梁晓静
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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