Method for separating cobalt, nickel and magnesium from nickel oxide ore pickle liquor

A technology of nickel oxide ore and separation method, applied in the field of separation of magnesium, cobalt and nickel in acid leaching solution of nickel oxide ore, can solve the problems of increasing the cost of extraction and separation, increasing the cost of extraction, prolonging the extraction process, etc. Separation efficiency, achieve rapid precipitation, and speed up filtration.

Active Publication Date: 2016-02-03
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the extraction and separation of cobalt and nickel cannot be directly performed with P507. It is necessary to add alkaline substances to neutralize the leaching solution, and the pH value of the leaching solution is raised to greater than 3 before the extraction operation can be performed. As mentioned in the patent with the publication number CN101532094A Before P507 extraction and separation of nickel and cobalt, the pH value of the solution should be adjusted to 3-4.5 by adding a regulator, which will also increase the consumption of alkaline substances and increase the extraction cost
[0007] When back-extracting loaded P507, it is generally necessary to use a higher concentration of sulfuric acid, resulting in a higher residual acid in the blank organic phase after stripping. After the blank organic phase is acid-eluted with water, the organic phase can be recycled. This not only The extraction process is prolonged, and the cost of extraction and separation is further increased

Method used

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  • Method for separating cobalt, nickel and magnesium from nickel oxide ore pickle liquor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Co in the nickel oxide ore sulfuric acid leaching solution 2+ ,Ni 2+ , Mg 2+ The concentrations are 0.1g / L, 1.05g / L, 2.3g / L, iron ions (including Fe 2+ And Fe 3+ , The same below) the concentration is 0.001g / L, the pH value of the material liquid is 1.2, and the material liquid is sent to the stirred tank;

[0039] Weigh 0.001 times the mass of the nickel oxide mineral acid leaching solution, and add water to prepare an aqueous slurry of magnesium oxide with a mass concentration of 40% magnesium oxide;

[0040] Start the agitator of the stirred tank (rotational speed is 250 rpm), then add the aqueous magnesium oxide slurry to the stirred tank at a flow rate of 0.3 L / min, stir and react at 30°C for 3 hours to obtain a mixture (pH value of 8.1);

[0041] (2) Liquid-solid separation is performed on the mixture obtained in step (1) to obtain solid filter residue and filtrate;

[0042] (3) Transfer the filter residue obtained in step (2) to another stirring tank, add 0.5 mol / L su...

Embodiment 2

[0048] (1) Co in the nickel oxide ore sulfuric acid leaching solution 2+ ,Ni 2+ , Mg 2+ Concentrations are 0.3g / L, 2.3g / L, 13g / L, the concentration of iron ions is 0.005g / L, the pH of the material liquid is 2.2, and the material liquid is sent to the stirred tank;

[0049] Weigh 0.0018 times the mass of the nickel oxide mineral acid leaching solution and add water to prepare an aqueous slurry of magnesium oxide with a mass concentration of 40% magnesium oxide;

[0050] Start the agitator of the stirred tank (speed of 350rpm), then add the aqueous magnesium oxide slurry to the stirred tank at a flow rate of 0.8L / min, stir and react at 50°C for 2.5h to obtain a mixture (pH value of 8.2);

[0051] (2) Liquid-solid separation is performed on the mixture obtained in step (1) to obtain solid filter residue and filtrate;

[0052] (3) Transfer the filter residue obtained in step (2) to another stirred tank, add 0.8 mol / L sulfuric acid solution, and heat to 30°C and stir until the filter residu...

Embodiment 3

[0057] (1) Co in the nickel oxide ore sulfuric acid leaching solution 2+ ,Ni 2+ , Mg 2+ The concentrations of the are 0.3g / L, 5.7g / L, 30g / L, the concentration of iron ions is 0.0004g / L, the pH of the material liquid is 3.1, and the material liquid is sent to the stirred tank;

[0058] Weigh 0.003 times the mass of the nickel oxide mineral acid leaching solution, and add water to prepare an aqueous slurry of magnesium oxide with a mass concentration of 50% magnesium oxide;

[0059] Start the agitator of the stirred tank (speed of 400rpm), then add the aqueous magnesium oxide slurry to the stirred tank at a flow rate of 0.5L / min, stir and react at 70°C for 1h to obtain a mixture (pH value of 8.3);

[0060] (2) Liquid-solid separation is performed on the mixture obtained in step (1) to obtain solid filter residue and filtrate;

[0061] (3) Transfer the filter residue obtained in step (2) to another stirred tank, add 1mol / L sulfuric acid solution, and heat to 60°C and stir until the filter...

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Abstract

The invention discloses a method for separating cobalt, nickel and magnesium from nickel oxide ore pickle liquor. The method comprises the following steps that the pickle liquor on which iron removing operation is carried out is arranged in a stirring kettle, the pickle liquor contains cobalt, nickel and magnesium, magnesium oxide water-based slurry is added, the mass concentration of magnesium oxide in the magnesium oxide water-based slurry is controlled to be smaller than or equal to 80%, and the dosage of magnesium oxide is 0.001-0.01 time of the mass of nickel oxide ore pickle liquor; the stirring reaction is carried out till thorough deposition, filtering and separating are carried out to obtain filter residues and filter liquor, and the filter liquor is fed in the pickle liquor treatment procedure to prepare magnesium oxide for repeated utilization; after being dissolved through dilute acid, the filter residues are introduced into an extraction system, extraction separation is carried out through a mixing extraction agent, a solution containing nickel sulfate and cobaltous sulfate is obtained at an outlet of an extraction trough and an outlet of a reverse extraction trough, and after reverse extraction is carried out on the mixing extraction agent through dilute acid, the mixing extraction agent returns to the extraction trough to be circularly utilized. According to the method, complete separation of cobalt, nickel and magnesium is achieved, saponification of the extraction agent is not needed, the cobalt and nickel separation efficiency is high, the consumption of a reagent is low, and the separation cost is low.

Description

Technical field [0001] The invention relates to a nickel ore smelting method, in particular to a method for separating cobalt, nickel and magnesium in an acid leaching solution of nickel oxide ore. Background technique [0002] The acid leaching process is a common technique for smelting nickel oxide ore, and the sulfuric acid leaching process is widely used in the wet smelting of nickel oxide ore. In addition to nickel and cobalt, nickel oxide ore also contains metal elements such as iron, magnesium, and aluminum. The sulfuric acid leaching of nickel oxide ore is a leachate containing metal ions such as iron, aluminum, magnesium, nickel, and cobalt, which must be separated to obtain metals such as nickel and cobalt and their compounds. For the separation of metal ions in the acid leaching solution of nickel oxide ore, iron and aluminum ions are usually separated first by precipitation, and then nickel, cobalt, and magnesium ions are further separated. [0003] Solvent extraction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/20C22B3/26C22B23/00C22B26/22
CPCY02P10/20
Inventor 刘葵龙华陈世南王增凯邝丽芳张萍汤晓梦王岩
Owner GUANGXI NORMAL UNIV
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