Treatment method of laterite-nickel ore

A treatment method, the technology of laterite nickel ore, applied in the field of laterite nickel ore treatment, can solve the problem of high cost of wet treatment process, and achieve the effect of saving material cost

Active Publication Date: 2020-08-07
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a kind of treatment method of laterite nickel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Use 100Kg of limonite-type laterite nickel ore as raw material, wherein the nickel content is 0.6wt%, and the cobalt content is 0.1wt%. Obtain iron-containing acid leaching slag and acid leaching solution.

[0034] Calcium oxide is added to the pickling solution, the final pH value of the pickling solution is adjusted to 1.2, and gypsum slag and pre-neutralization solution are obtained after solid-liquid separation.

[0035] Air is introduced into the pre-neutralization solution, and the temperature is controlled at 90°C to convert the divalent iron ions in the pulp into trivalent iron ions. At the same time, calcium oxide is added to precipitate and remove most of the iron and aluminum, and filtered to obtain iron-containing aluminum slag and pH Iron and aluminum solution with a value of 5-7.

[0036] Calcium oxide is added to the iron-removing aluminum solution, and filtered to obtain a precipitated intermediate product containing nickel hydroxide and cobalt (MHP inter...

Embodiment 2

[0045] Adopt 100Kg limonite type laterite nickel ore as raw material, wherein nickel content is 0.6wt%, cobalt content 0.1wt%, this laterite nickel ore is crushed and ground to 200 orders, adopts the method identical with embodiment 1 to acidify then Dipping, pre-neutralization, iron and aluminum removal, and neutralization treatment to obtain a precipitated intermediate product (MHP intermediate product) containing nickel hydroxide and cobalt.

[0046] The MHP intermediate product was dissolved with concentrated sulfuric acid to obtain a mixed solution containing scandium, wherein the concentration of scandium was 30 mg / L, and the concentration of iron was 7.4 mg / L.

[0047] Adjust the pH value of the mixed solution containing scandium to about 2. As the solution to be adsorbed, add cationic resin TP260 to it at the ratio of 1g resin: 50mL solution, scandium and iron in the solution to be adsorbed are adsorbed on the resin.

[0048] The resin and the solution after adsorption...

Embodiment 3

[0053] Adopt 100Kg limonite type laterite nickel ore as raw material, wherein nickel content is 0.6wt%, cobalt content 0.1wt%, this laterite nickel ore is crushed and ground to 200 orders, adopts the method identical with embodiment 1 to acidify then Dipping, pre-neutralization, iron and aluminum removal, and neutralization treatment to obtain a precipitated intermediate product (MHP intermediate product) containing nickel hydroxide and cobalt.

[0054] The MHP intermediate product was dissolved with concentrated sulfuric acid to obtain a mixed solution containing scandium, wherein the concentration of scandium was 30 mg / L, and the concentration of iron was 7.4 mg / L.

[0055] Adjust the pH value of the scandium-containing mixed solution to about 0.5, as the solution to be adsorbed, add cationic resin TP260 to it at the ratio of 1g resin: 100mL solution, scandium and iron in the solution to be adsorbed are adsorbed on the resin.

[0056] The resin and the solution after adsorpt...

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Abstract

The invention provides a treatment method of laterite-nickel ore. The treatment method of the laterite-nickel ore comprises the steps of: S1, enabling the laterite-nickel ore to be sequentially subjected to acid leaching, pre-neutralization, iron and aluminum removal and neutralization treatment, and obtaining an intermediate product containing cobalt nickel hydroxide; S2, dissolving the intermediate product with sulfuric acid to obtain a scandium-containing iron mixed solution; S3, adsorbing the scandium-iron-containing mixed solution by using cationic resin to remove scandium and iron to obtain adsorbed resin and an adsorbed solution; S4, performing desorption treatment on the adsorbed resin by using alkali liquor, and separating desorption resin from the adsorbed solution containing scandium-iron precipitate to obtain desorption resin and desorption slurry containing scandium-iron precipitate; S5, carrying out solid-liquid separation on the desorption slurry containing the scandium-iron precipitate to obtain the scandium-iron precipitate and the adsorbed solution, and returning the adsorbed solution to the desorption treatment step for reuse; and S6, extracting the adsorbed solution to remove manganese. The process of precipitating the metal desorbed from the adsorbed solution does not exist, so that the cost is low.

Description

technical field [0001] The invention relates to the technical field of processing laterite nickel ore, in particular to a processing method for laterite nickel ore. Background technique [0002] The hydrometallurgy process of laterite nickel ore often includes the process of P204 extraction and removal of manganese. If the solution before extraction contains a certain amount of scandium and iron, co-extraction of scandium and iron will often occur during extraction and removal of manganese. When stripping manganese, scandium and iron are not easy to enter the stripping solution, but stay in the organic phase. With the circulation of the organic phase, the scandium and iron in it gradually accumulate, which seriously affects the performance of the organic phase. At present, the precipitation method or extraction method is generally used to remove scandium and iron in the solution, and this method is more suitable for the situation where the concentration of scandium and iron...

Claims

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Application Information

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IPC IPC(8): C01G53/00C22B3/06C22B3/24C22B23/00
CPCC01G53/003C22B3/06C22B3/24C22B23/0415C22B23/0453Y02P10/20
Inventor 林洁媛刘诚孙宁磊李勇丁剑王霄刘国
Owner CHINA ENFI ENGINEERING CORPORATION
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