Treatment method for separating and extracting nickel, cobalt, magnesium and iron from laterite nickel ores

A technology of lateritic nickel ore and treatment method, which is applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of complex and cumbersome operation methods, incomplete precipitation of cobalt, and lake drying up and death, and achieve high metal separation and extraction rates, Shorten the leaching time and reduce environmental pollution

Inactive Publication Date: 2018-09-04
王颖皓
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

In this patented technology, there were technical benefits such as improved efficiency during hydrometallurgery (electrolysis) or reduced costs associated with producing high grade materials from lower quality raw material sources like pyrite). Additionally, these technologies could help reduce harmful chemical waste produced through traditional methods involving burning them away after they had done their work.

Problems solved by technology

This patented technical problem addressed in this patent relates to improving the efficiency and reuseability of valuable rare earth deposits such as those found around China' s borders during long term use of these types of alloys. Current treatment options involve expensive chemical processes that generate hazardous wastes like nitrate solutions containing harmful elements. There have been attempts at developing new ways to recover them through recovery techniques without generating excessive amounts of waste material.

Method used

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  • Treatment method for separating and extracting nickel, cobalt, magnesium and iron from laterite nickel ores

Examples

Experimental program
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Effect test

Embodiment 1

[0038] (1) Pretreatment of laterite nickel ore: Put the laterite nickel ore into the material bed for grinding to make the soil powdery, add 3mol / L sulfuric acid, the solid-to-liquid ratio is 1:3.5, and then heat it with microwave 700W for 2 hours to obtain the leachate I, laterite The content of main valuable metals in the nickel ore leachate I was measured to be nickel: 4.52g / L, cobalt: 0.28 g / L, iron: 95.98 g / L, magnesium 6.11 g / L;

[0039] (2) Secondary separation of iron: put the leachate I into the reactor, pump oxygen to pressurize to 0.8MPa, control the temperature at 55°C, and adjust the pH of the leachate I to 2 to hydrolyze and precipitate the ferric iron into ferric hydroxide to obtain the leachate II; The leach solution II flows into the next reaction kettle, and the pH of the leach solution II is precisely adjusted to 3.2 to completely precipitate the ferric iron to obtain the leach solution III;

[0040] (3) Extraction of other trace metals: adding 1 part of P20...

Embodiment 2

[0047] (1) Pretreatment of laterite nickel ore: Put the laterite nickel ore into the material bed for grinding to make the soil powdery, add 3mol / L sulfuric acid, the solid-liquid ratio is 1:3, and then heat it with microwave 800W for 2.5h to obtain the leachate I. The content of main valuable metals in the lateritic nickel ore leachate I was measured to be nickel: 5.18 g / L, cobalt: 0.22 g / L, iron: 93.65 g / L, and magnesium: 6.89 g / L.

[0048] (2) Secondary separation of iron: Put the leachate I into the reactor, pump oxygen to pressurize to 0.6MPa, control the temperature at 60°C, and adjust the pH of the leachate I to 3.0 to hydrolyze and precipitate the ferric iron into ferric hydroxide to obtain the leachate II; The leach solution II flows into the next reaction kettle, and the pH of the leach solution II is precisely adjusted to 3.2 to completely precipitate the ferric iron to obtain the leach solution III;

[0049] (3) Extraction of other trace metals: add 1 part of P204 ...

Embodiment 3

[0056] (1) Pretreatment of laterite nickel ore: Put the laterite nickel ore into the material bed for grinding to make the soil powdery, add 3mol / L sulfuric acid, the solid-liquid ratio is 1:4, and then heat it with microwave 900W for 1.5h to obtain the leachate I. The content of main valuable metals in the lateritic nickel ore leachate I was measured as nickel: 4.86g / L, cobalt: 0.19 g / L, iron: 97.38 g / L, and magnesium: 6.35 g / L.

[0057] (2) Secondary separation of iron: put the leachate I into the reactor, pump oxygen to pressurize to 1MPa, control the temperature to 70°C, and adjust the pH of the leachate I to 2.0 to hydrolyze and precipitate the ferric iron into ferric hydroxide to obtain the leachate II; II flows into the next reactor, and the pH of the leachate II is precisely adjusted to 3.2 to completely precipitate the ferric iron to obtain the leachate III;

[0058] (3) Extraction of other trace metals: adding 1 part of P204 and 2 parts of sulfonated kerosene to the ...

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Abstract

The invention discloses a treatment method for separating and extracting nickel, cobalt, magnesium and iron from laterite nickel ores. The treatment method comprises the following steps: grinding thelaterite nickel ores and heating the laterite nickel ores with microwaves; adding sulfuric acid to prepare a laterite nickel ore leaching liquid; introducing oxygen, pressurizing and heating the laterite nickel ore leaching liquid, and adjusting the pH to 2-3 for separating iron secondarily; adding P204 into the leaching liquid to extract other trace metals to obtain an aqueous solution only containing nickel, cobalt and magnesium; adjusting the PH for separating magnesium secondarily; adding P507 and dimethyl tetradecylamine into the leaching liquid to extract cobalt; electrically depositingnickel in form of nickel sulfate to produce electric nickel; and reversely extracting cobalt with a high concentration sulfuric acid solution and electrically depositing the solution to produce electrolytic cobalt, wherein in the process of electrically depositing nickel and cobalt, oxygen will be separated out and sulfuric acid is regenerate, and oxygen and sulfuric acid are recovered for recycling. According to the treatment method, metals which are relatively great in content in the laterite nickel ores can be extracted, the dosage of oxygen and sulfuric acid in the cyclic process can be reduced, heavy metal pollution by the waste liquor to the environment is reduced while the metals are fully recovered, and the treatment method is energy-saving and environment-friendly.

Description

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Claims

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Application Information

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Owner 王颖皓
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