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Technology for producing nickel sulfate by bacterial oxidation dump leaching of low-grade primary nickel sulfide ore

A technology of bacterial oxidation and nickel sulfide, applied in the direction of nickel sulfate, process efficiency improvement, etc., can solve the problems of undeveloped utilization, technical limitations, high cost, and achieve the effects of low cost, low energy consumption and short process.

Inactive Publication Date: 2014-11-05
JILIN JIEN NICKEL IND +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For rich nickel sulfide ores, there are currently many methods to develop and generate nickel sulfate. However, low-grade nickel sulfide ores are still undeveloped due to technical limitations, low profits, and high costs.

Method used

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  • Technology for producing nickel sulfate by bacterial oxidation dump leaching of low-grade primary nickel sulfide ore

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The low-grade primary nickel sulfide ore is crushed to ore powder with an average fineness of -10mm, and the ore powder is transported to the storage yard with a belt conveyor for piles. The pile height is 4m. When the ore powder is unloaded, the ore leaching bacteria culture solution is sprayed, and the dilute sulfuric acid solution is sprayed on the ore pile in sections to control the pH of the ore pile to 2.0. Spray the pre-cultured ore pile, the flora in the logarithmic growth phase, and the flora concentration reaches 10 8 A / ml of the ore-leaching bacterial culture solution makes the spray solution react with the mine pile, and the reaction time is 4 months. Keep ventilating the mine pile during spraying, the spray intensity is 30L / m 2 ·H, the spray time is 8h / d, ammonium sulfate and dipotassium hydrogen sulfate nutrients are added to the spray liquid, the redox potential of the spray liquid is 470mv, and the pH value of the mine pile is controlled at 1.9. Collect t...

Embodiment 2

[0039] The low-grade primary nickel sulfide ore is crushed to ore powder with an average fineness of -10mm, and the ore powder is transported to the storage yard with a belt conveyor for stacking, and the stacking height is 3m. Spray the ore-leaching bacterial culture solution when unloading the ore powder; spray dilute sulfuric acid solution on the ore pile in sections to control the pH of the ore pile to 2.0. Spray the pre-cultured ore pile and the flora in the logarithmic growth phase 、Bacteria concentration reaches 10 8 A / ml of ore-leaching bacterial culture solution to make the spray liquid react with the mine pile. The reaction time is 5 months. Keep the mine pile ventilated during spraying, and the spray intensity is 35L / m 2 ·H, the spray time is 10h / d; ammonium sulfate and dipotassium hydrogen sulfate nutrients are added to the spray liquid, and the redox potential of the spray liquid is 520mv; the pH value of the mine pile is controlled at 1.7. Collect the leaching solu...

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Abstract

The invention relates to a technology for producing nickel sulfate by bacterial oxidation dump leaching of low-grade primary nickel sulfide ore, and belongs to a treatment method of nickel sulfide ore. The technology comprises an ore fragmentation and granule heaping process, an acid treatment process, a biological oxidation process and a leachate iron removal and extraction impurity-removal process. Through the above processes, a nickel sulfate product is obtained. Compared with the prior art, the technology is used for producing nickel sulfate from low-grade primary nickel sulfide ore and has the characteristics of simple processes, labor saving and time saving, low cost, small energy consumption, short flow, high efficiency, safety and environmental friendliness.

Description

Technical field [0001] The invention belongs to a method for processing nickel sulfide ore, and particularly relates to a process for producing nickel sulfate from low-grade primary nickel sulfide ore. Background technique [0002] Nickel sulfate is an important modern chemical product, mainly used for electroplating, nickel batteries, catalysts and other nickel salts, etc. It is also a source of metallic nickel ions. In the electroplating process, it can dissociate nickel ions and sulfate ions; in the production of hardened oil, it is a catalyst for the hydrogenation of fats; in the medical industry, it is a catalyst for the oxidation reaction in the production of vitamin C; in the electrodeless industry, it is the production of nickel Salts such as nickel ammonium sulfate, nickel oxide and nickel carbonate are the main raw materials; in the printing and dyeing industry, it is used as a complexing agent for the production of phthalocyanine blue, used as a coal dye for vat dyes; ...

Claims

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Application Information

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IPC IPC(8): C01G53/10C22B3/18
CPCY02P10/20
Inventor 任洪胜邢洪波张鸣昕刘新艳商雅文
Owner JILIN JIEN NICKEL IND