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Method for extracting nickel and molybdenum from nickel-molybdenum ore

A technology of nickel-molybdenum ore and nickel-molybdenum, which is applied in the direction of improving process efficiency, can solve the problems of low recovery rate of molybdenum and nickel, low product purity, etc., and achieve the effects of low production cost, simple process flow, and easy-to-obtain raw materials

Inactive Publication Date: 2011-08-03
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods do not need to be roasted and will not produce SO 2 pollute the environment, but the above-mentioned method has a low recovery rate of molybdenum and nickel, and the product purity obtained is also low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Crush 100g of sulfide ore containing nickel and molybdenum into fine ore with a particle size of less than 0.154mm, add 300g of water to the fine ore for beating, then add 300g of industrial hydrochloric acid, then slowly add 50g of potassium perchlorate, heat up to 90°C, Stirring and leaching for 2 hours, filtering to obtain a leaching solution; adding lime to the leaching solution, adjusting its pH value to 2, stirring for 30 minutes, and obtaining molybdenum-rich slag and nickel-rich supernatant after filtering;

[0059] Add sodium carbonate to the nickel-rich supernatant until the pH value is 5, and obtain a precipitate after filtration; carry out component analysis on the precipitate, which is nickel carbonate, wherein the content of nickel is 22.05%, and the yield of nickel is 96.03%;

[0060] Add 100mL of water to the molybdenum-rich slag for beating, then add 50g of sodium carbonate and 50g of sodium hydroxide, heat to 70°C, stir for 1 hour, and obtain molybdenu...

Embodiment 2

[0062] Break 100g of sulfide ore containing nickel and molybdenum into powder ore with a particle size of less than 0.154mm, add 300g of water into the powder ore for beating, then add 300g of industrial sulfuric acid, then slowly add 50g of sodium perchlorate, and heat up to 90 ℃, stirred and leached for 2 hours, filtered to obtain leachate; added industrial sodium carbonate to the leachate, adjusted its pH value to 4, stirred for 30 minutes, obtained molybdenum-rich slag and nickel-rich supernatant after filtration;

[0063] Add sodium carbonate to the nickel-rich supernatant until the pH value is 7, and obtain a precipitate after filtration; carry out component analysis on the precipitate, which is nickel carbonate, wherein the nickel content is 21.83%, and the nickel yield 96.57%;

[0064] Add 100mL of water to the molybdenum-rich slag for beating, then add 50g of sodium carbonate and 50g of sodium hydroxide, heat to 90°C, stir for 1 hour, and obtain molybdenum-rich supern...

Embodiment 3

[0066] Crush 100g of sulfide ore containing nickel and molybdenum into powder ore with a particle size of less than 0.154mm, add 500g of water into the powder ore for beating, then add 500g of industrial hydrochloric acid, then slowly add 100g of potassium perchlorate, heat up to 90°C, Stirring and leaching for 2 hours, filtering to obtain a leachate; adding lime to the leachate, adjusting its pH to 3, stirring for 30 minutes, and filtering to obtain a molybdenum-rich slag and a nickel-rich supernatant;

[0067] Add sodium carbonate to the nickel-rich supernatant until the pH value is 6, and obtain a precipitate after filtration; carry out component analysis on the precipitate, which is nickel carbonate, wherein the nickel content is 22.79%, and the nickel yield 97.16%;

[0068] Add 100mL of water to the molybdenum-rich slag for beating, then add 50g of sodium carbonate and 50g of sodium hydroxide, heat to 80°C, stir for 1 hour, and obtain molybdenum-rich supernatant and iron ...

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Abstract

The invention discloses a method for extracting nickel and molybdenum from nickel-molybdenum ore, comprising the following steps of: (a) in the presence of an oxidizing agent, leaching the finely-ground nickel-molybdenum ore from an acid solution and filtering to obtain a leachate, wherein the oxidizing agent is sodium chlorate or potassium chlorate; (b) adding a first alkaline compound in the leachate, adjusting the pH value of the leachate to be 1.5-3.5 and filtering to respectively obtain a precipitation and a supernate; (c) adding a second alkaline compound in the supernate, adjusting thepH value of the supernate to be 5-7 and filtering to obtain a nickel-containing compound; and (d) leaching the precipitation in an alkali liquor, filtering to obtain a molybdenum-containing leachate,and extracting and re-extracting the molybdenum-containing leachate to obtain a molybdenum-containing compound. By using the method, the sodium chlorate or potassium chlorate is used as the oxidizingagent, the higher leaching rate of the nickel and molybdenum and the higher recovery rate of the nickel and molybdenum can be obtained.

Description

technical field [0001] The invention belongs to the technical field of mineral extraction, in particular to a method for extracting nickel and molybdenum from nickel-molybdenum ore. Background technique [0002] Nickel-molybdenum ore is a kind of polymetallic complex ore resource, which is mainly distributed in the ore belts of Hunan, Hubei, Chongqing, Guizhou, Sichuan, Guizhou, Shaanxi and Gansu. The molybdenum content in nickel-molybdenum ore is about 2.5% to 11%, the nickel content is about 0.7% to 7.7%, and other elements such as carbon, sulfur, and iron are also contained. [0003] The prior art discloses a variety of methods for extracting nickel and molybdenum from nickel-molybdenum ore. For example, the Chinese patent document with application number 95110744.5 discloses the separation of nickel and molybdenum in nickel-molybdenum ore by combining mechanical beneficiation and low-temperature selective reduction. For molybdenum, first crush the raw ore, ball mill, an...

Claims

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Application Information

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IPC IPC(8): C22B3/04C22B23/00C22B34/34
CPCY02P10/20
Inventor 张志峰李红飞国富强冯亚云孟淑兰
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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