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New treating method for nickel oxide ore

A technology of nickel oxide ore and a new method, applied in the direction of process efficiency improvement, solid separation, flotation, etc., can solve the problems of undesired heap leaching, low leaching rate, waste of resources, etc., to save and protect the environment, nickel The effect of less loss and lower production cost

Inactive Publication Date: 2006-11-08
YUNNAN TIN GROUP HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] Therefore, it is generally believed in the industry that the pyrometallurgy of nickel oxide ore with low grade and high power cost is uneconomical; and the ammonia leaching method also has problems such as high energy consumption in the reduction process and high chemical cost; the heap leaching method is obviously more Not advisable, its leaching rate is too low, waste of resources, large amount of residual liquid and pollute the environment
Therefore, the above methods are not the best way to deal with nickel oxide ore

Method used

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  • New treating method for nickel oxide ore

Examples

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Effect test

Embodiment 1

[0022] Get 2 kilograms of laterite nickel ore (ferro-magnesian mixed ore) in Yuanjiang, Yunnan, and through crushing and grinding, the slurry particle size is less than 150 mesh, accounting for 85%, and the liquid-solid ratio of the slurry is 2.5. The material is charged into the reactor, heated to 80 ° C, and Concentrated sulfuric acid was stirred for 1 hour, and the pH value at the end point was controlled to reach 2, and the vulcanizing agent sodium sulfide was added to carry out a chemical reaction. After the reaction, the pH value was 3, and precipitated nickel sulfide was produced. Then send all the reactants in the reactor to the mixing tank, add the flotation agent butyl xanthate into the mixing tank for stirring, and then put the pulp into the flotation column to float the nickel sulfide concentrate. The nickel grade of the ore is 1.19%, the nickel grade of the concentrate is 24-25%, and the nickel recovery rate is 66-70%.

Embodiment 2

[0024] Take 100 kg of laterite nickel ore (ferro-magnesian mixed ore) in Yuanjiang, Yunnan, and after crushing and grinding, the slurry particle size is less than 150 mesh, accounting for 80%, and the liquid-solid ratio of the slurry is 2.8. In the reaction kettle, heat to 90°C, add concentrated sulfuric acid and forcefully stir for 100 minutes, control the end point pH value to 1.5, add sulfide agent hydrogen sulfide to carry out chemical reaction, the pH value after the reaction is 3.5, and produce precipitated nickel sulfide. Then send all the reactants in the reaction kettle to the mixing tank, add the flotation agent ethaxanthate into the mixing tank for stirring, and then put the pulp into the flotation machine to float the nickel sulfide concentrate. The nickel grade of the ore is 1.25%, the nickel grade of the concentrate is 24-25%, and the nickel recovery rate is 63-66%.

Embodiment 3

[0026] Take 400 kg of laterite nickel ore (ferro-magnesian mixed ore) in Yuanjiang, Yunnan, and after crushing and grinding, the slurry particle size is less than 150 mesh, accounting for 86%, and the liquid-solid ratio of the slurry is 3. In the reaction kettle, heat to 95°C, add concentrated sulfuric acid and forcefully stir for 120 minutes, control the end point pH value to 1.8, add the vulcanizing agent potassium sulfide to carry out chemical reaction, the pH value after the reaction is 4, and precipitated nickel sulfide is produced. Then send all the reactants in the reactor to the mixing tank, add the flotation agent pine oil into the mixing tank for stirring, and then put the pulp into the flotation tank to float the nickel sulfide concentrate. The nickel grade of the ore is 1.22%, the nickel grade of the concentrate is 24-25%, and the nickel recovery rate is 64-67%.

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Abstract

The new nickel oxide ore treating process has synthesized chemical metallurgy and ore dressing technology. The technological process includes crushing ore, grinding ore into ore pulp, magnetically separating out strong magnetic mineral, heating ore pulp and leaching out with concentrated sulfuric acid, adding sulfurizing agent for chemical reaction to produce nickel sulfide precipitate, and floating out nickel sulfide concentrate. The technological process is simple, low in production cost, high in nickel oxide leaching rate, effective utilization of resource and environment friendship.

Description

technical field [0001] The invention relates to a process technology for treating nickel oxide ore, which is a new process method for treating nickel oxide ore which combines chemical metallurgy and ore dressing technology. technical background [0002] At present, there are three methods of processing technology for nickel oxide ore in the world, namely pyrotechnics, wet process and fire-wet combined process. [0003] The first pyrotechnic process: the ore is crushed, roasted for reduction smelting, and the crude nickel-iron alloy and high-nickel-sulfur products are produced, and then the semi-finished product is sent to the refining process for supporting treatment. [0004] The second wet process: one of them is the ammonia leaching process, the nickel oxide ore is crushed, reduced and roasted, and then 4-stage countercurrent ammonia leaching, so that valuable metals such as nickel enter the leaching solution. The leaching solution sulfides and precipitates basic nickel ...

Claims

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Application Information

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IPC IPC(8): C22B3/08B03B1/02B03D1/00
CPCY02P10/20
Inventor 王炜潘基泽杨成林
Owner YUNNAN TIN GROUP HLDG
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