Nickel oxide ore acid leaching solution two-step iron removal method

A technology for nickel oxide ore and acid leaching solution, applied in the field of nickel ore smelting, can solve problems such as complicated production operation, and achieve the effects of eliminating separation process, improving crystallinity and improving filtration performance

Active Publication Date: 2014-10-29
GUANGXI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Nickel oxide ore acid leaching solution two-step iron removal method

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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

The invention discloses a nickel oxide ore acid leaching solution two-step iron removal method. The method comprises the following steps: adding garnierite ore pulp into a nickel oxide ore acid leaching solution, stirring and reacting until the dissolution is completed and the pH value of the solution is more than or equal to 1.6, performing liquid-solid separation, raising the temperature of obtained liquid to 130-170 DEG C, stirring and reacting for 1-3 hours, performing liquid-solid separation, and drying a solid to obtain a hematite product; adding the garnierite ore pulp into the collected liquid for the second time, stirring and reacting until the dissolution is completed and the pH value of the solution is about 2, performing liquid-solid separation, and adding magnesium oxide and an oxidizing agent into the obtained liquid, or only adding the oxidizing agent; stirring and reacting for 0.5-4 hours, performing liquid-solid separation, and drying the solid to obtain a goethite product. By adopting the method disclosed by the invention, complete iron removal can be achieved under a relatively mild condition; hematite and goethite which can be directly sold can be obtained; meanwhile, residual acid in the acid leaching solution and acid released in the iron deposition process are recycled; loss of nickel, cobalt, aluminum and magnesium in the leaching solution can not be generated.

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 Applications(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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