A two-step iron removal method for nickel oxide ore acid leaching solution

A technology for nickel oxide ore and acid leaching solution, which is applied in the field of nickel ore smelting, can solve the problems of complicated production and operation, and achieve the effects of eliminating separation process, fast iron deposition and improving filtration performance.

Active Publication Date: 2016-03-02
GUANGXI NORMAL UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

However, this method requires strict control of the addition of high-magnesium content ore and the pH value of the acid leaching solution. When the pH value of the stock solution, iron ion concentration, and mineral composition of the high-magnesium content ore change, the production process needs to be adjusted in time. And change the addition amount and addition time of high magnesium content ore, which makes the production operation somewhat cumbersome

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  • A two-step iron removal method for nickel oxide ore acid leaching solution

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Fe in the stock solution of sulfuric acid leaching solution of nickel oxide ore 3+ , Fe 2+ , Ni 2+ ,Co 2+ , Mg 2+ , Al 3+ The concentrations are 30.4g / L, 0.5g / L, 1.05g / L, 0.095g / L, 4.3g / L, 1.89g / L, the pH value of the stock solution is 0.38, and the solid content is 30% in the stock solution (wt%) of Simagnesium-nickel ore aqueous slurry (wherein, Fe, Ni, Co, Mg, the content of Al are respectively 4.8%, 1.9%, 0.04%, 24.1%, 3.7% in Simagnesia-nickel ore, Simagnesium-nickel ore The amount of ore slurry added is 2.5 times the volume of the original solution), stirred and reacted at 90°C for 1 hour (at this time, the silicon-magnesium-nickel ore slurry is completely dissolved), and liquid-solid separation is carried out to obtain solid A and liquid A;

[0033] (2) Warm up the liquid A to 160°C, stir and react for 1.5h, and separate the liquid and solid to obtain solid B and liquid B, collect and dry the solid B to obtain the hematite product;

[0034] (3) Add the ...

Embodiment 2

[0040] (1) Fe in the stock solution of sulfuric acid leaching solution of nickel oxide ore 3+ , Fe 2+ , Ni 2+ ,Co 2+ , Mg 2+ , Al 3+ The concentrations are 42.4g / L, 2.5g / L, 1.24g / L, 0.15g / L, 3.3g / L, 1.1g / L, the pH value of the stock solution is -0.03, and the solid content is 20 % (wt %) of Simagnesium ore aqueous ore slurry (wherein, Fe, Ni, Co, Mg, the content of Al are respectively 3.2%, 1.19%, 0.05%, 19.1%, 4.9% in Simagnesia nickel ore, Simagnesium The amount of nickel ore slurry added is 3 times the volume of the original solution), stirred and reacted at 100°C for 0.5h (at this time, the silicon-magnesium-nickel ore slurry is completely dissolved), and liquid-solid separation is carried out to obtain solid A and liquid A;

[0041] (2) Warm up the liquid A to 140°C, stir and react for 2 hours, and separate the liquid and solid to obtain solid B and liquid B, collect and dry the solid B to obtain the hematite product;

[0042] (3) In liquid B, add magnesia ore pulp ...

Embodiment 3

[0047] (1) Fe in the stock solution of sulfuric acid leaching solution of nickel oxide ore 3+ , Fe 2+ , Ni 2+ ,Co 2+ , Mg 2+ , Al 3+ The concentrations are 19.4g / L, 3.1g / L, 1.0g / L, 0.11g / L, 8.3g / L, 2.1g / L, the pH value of the stock solution is 0.73, and the solid content is 40% in the stock solution (wt%) of Simagnesium-nickel ore aqueous slurry (wherein, Fe, Ni, Co, Mg, the content of Al are respectively 1.5%, 1.09%, 0.02%, 13.4%, 5.9% in Simagnesia-nickel ore, Simagnesium-nickel ore The amount of ore pulp added is 1.5 times the volume of the original liquid), stirred and reacted at 60°C for 2 hours (at this time, the silicon-magnesium-nickel ore pulp is completely dissolved), and liquid-solid separation is carried out to obtain solid A and liquid A;

[0048] (2) Warm up the liquid A to 130°C, stir and react for 3 hours, and separate the liquid and solid to obtain solid B and liquid B, collect and dry the solid B to obtain the hematite product;

[0049] (3) Add the Sibe...

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Abstract

TWO-STAGE IRON REMOVING METHOD FOR SOLUTIONS OBTAINED FROM ACID LEACHING OF NICKEL OXIDE ORES A two-stage iron removing method for a solution obtained from acid leaching of a nickel oxide ore, the method including: adding a garnierite slurry to a leach solution of a nickel oxide ore, stirring until the garnierite is completely dissolved and a pH value of a resulting solution reaches >1.6, conducting liquid-solid separation; heating an obtained liquid to a temperature of 130-170 0C, stirring for 1-3 hours, conducting liquid-solid separation and drying a resulting solid whereby yielding a hematite product; adding the garnierite slurry for a second time to a collected liquid, stirring for a certain time until the garnierite is completely dissolved and the pH value of a resulting solution is approximately 2, conducting liquid-solid separation; and adding magnesium oxide and an oxidant or only adding an oxidant to a resulting liquid, stirring for 0.5-4 hours, conducting liquid-solid separation, and drying the solid whereby yielding a goethite product. Solutions obtained from acid leaching of nickel oxide ores Stirred tank Liquid-solid Solid A separation Garierite slurry Liquid A The first iron Preparing silica removal [ product Liquid-solid Solid B separation Drying Liquid B Hematite 10 Stirred tank Liquid-solid Solid C Storage of product separation Liquid C Magnesium _0 Magnesium The second iron Oxidant sulfate oxide removal Separating nickel, Liquid D Liquid-solid Solid D cobalt, aluminum separating and magnesium sprto Nickel product, cobalt product Goethite and magnesium product

Description

technical field [0001] The invention relates to a nickel ore smelting method, in particular to a two-step method for removing iron from nickel oxide ore acid leaching solution. Background technique [0002] Nickel oxide ore is the main resource of nickel ore, and the acid leaching process is a common technology for smelting nickel oxide ore, among which the process of using sulfuric acid as a leaching agent is the most common. Nickel oxide ore is usually divided into two categories: iron ore with higher iron content and magnesia ore with higher magnesium content. Whether it is through atmospheric pressure acid leaching, high pressure acid leaching or heap leaching, the nickel oxide ore acid leaching solution contains iron, nickel, cobalt, magnesium, aluminum and other metal ions, and the concentration of iron ions in the leaching solution is usually higher than that of other metals. Ion concentration, in which the concentration of iron ions in the atmospheric pressure acid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/46C22B3/06
CPCY02P10/20
Inventor 刘葵邝丽芳陈明珍龙华陈星新
Owner GUANGXI NORMAL UNIV
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