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Method of using ferric sulfate solution to perform acid leaching on laterite-nickel ore for extracting nickel and cobalt

A technology of laterite nickel ore and iron sulfate, applied in the direction of improving process efficiency, can solve the problems of high cost, complicated process, low yield, etc., and achieve the effects of prolonging service life, reducing equipment pressure, and reducing operating costs

Inactive Publication Date: 2015-05-13
JINCHUAN GROUP LIMITED
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the shortcomings of complex process, high cost and low yield in the high pressure acid leaching process, the present invention provides a method for extracting nickel and cobalt by acid leaching laterite nickel ore with ferric sulfate solution

Method used

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  • Method of using ferric sulfate solution to perform acid leaching on laterite-nickel ore for extracting nickel and cobalt
  • Method of using ferric sulfate solution to perform acid leaching on laterite-nickel ore for extracting nickel and cobalt
  • Method of using ferric sulfate solution to perform acid leaching on laterite-nickel ore for extracting nickel and cobalt

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Experimental program
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Embodiment

[0024] Sulfate enrichment solution rich in ferric iron: the main components of the atmospheric pressure leaching solution rich in iron, nickel and cobalt used in the experiment are as follows:

[0025] Table 1.1 Main chemical components of atmospheric pressure leachate

[0026]

[0027] Neutralizing raw materials: MgO powder and water are added with water according to the mass ratio of 1:1, fully stirred and mixed to make magnesium oxide emulsion.

[0028] The raw material composition of limonite-type lateritic nickel ore is shown in Table 1.2;

[0029] Table 1.2 Limonite type lateritic nickel ore raw material composition

[0030]

[0031] Grinding the above-mentioned limonite-type lateritic nickel ore to 200 mesh, adding water and stirring at a solid-to-liquid mass ratio of 1:1 to form a slurry;

[0032] Leaching: Put the iron-rich sulfate enrichment solution (pH ≈ 0.8,) and limonite slurry into the autoclave at the same time at a ratio of 1:2, heat to 95°C, and stir ...

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Abstract

The invention discloses a method of using ferric sulfate solution to perform acid leaching on a laterite-nickel ore for extracting nickel and cobalt. The method particularly comprises the following steps: mixing magnesium oxide powder with water to prepare a magnesium oxide emulsion for later use; using a brown iron ore containing 30-55% of iron as a raw material, adding water to the brown iron ore to prepare ore pulp for later use; adding a sulfate leaching agent and the brown iron ore pulp into an autoclave to be mixed and stirred, heating the liquid to a temperature of 150-250 DEG C to perform leaching, adding the prepared magnesium oxide emulsion, when the pH value of the solution is invariable, stopping adding the magnesium oxide emulsion, then performing solid-liquid separation to obtain a filtrate containing iron filter residues and rich in nickel and cobalt. According to the method disclosed by the invention, the laterite-nickel ore atmospheric pressure leaching agent or acidic wastewater containing higher iron and the low-grade brown iron ore type laterite-nickel ore are used as the raw materials; the reaction is taken at the pressure higher than atmospheric pressure, and most of soluble valuable metals is dissolved; at last, flash evaporation and filtration are carried out to obtain the nickel (cobalt) sulfate solution with a low impurity content as well as an iron ore concentrate product with a high iron content, so that the purpose of treatment of wastes with another wastes can be achieved, and the comprehensive utilization of the resources can be realized.

Description

technical field [0001] The invention relates to a hydrometallurgy treatment process of laterite nickel ore, in particular to a method for acid leaching laterite nickel ore with a sulfate-rich enrichment solution under high temperature and high pressure to extract and enrich nickel and cobalt. Background technique [0002] Nickel minerals mainly exist in two forms: nickel sulfide ore and nickel laterite ore (also known as laterite nickel ore), of which nickel sulfide ore accounts for about 20%, nickel laterite ore accounts for about 75%, nickel silicate ore accounts for 5%, and nickel ore accounts for about 20%. The development and utilization are mainly nickel sulfide ore and nickel laterite ore. Due to the continuous increase of nickel consumption and the continuous decrease of nickel sulfide ore reserves in recent years, the development of nickel laterite ore has been paid more and more attention. Ultrabasic rocks are formed by weathering, leaching, alteration, and enrichm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06C22B3/08C22B3/44C22B23/00C21B15/00
CPCY02P10/20
Inventor 杜昊刘玉强孙志忠袁红陈学安沙滨王晓婵李正禄姚菲王少华
Owner JINCHUAN GROUP LIMITED
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