Biological extract technology for ore of cobalt nickel oxide

A bioleaching and nickel-cobalt oxide technology, which is applied in the direction of improving process efficiency, can solve the problems of nickel oxide ore having no economic value, heavy environmental pollution, and complicated process

Inactive Publication Date: 2007-05-09
有研资源环境技术研究院(北京)有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The former has shortcomings such as high energy consumption, heavy environmental pollution, and low metal recovery rate; although the latter has completed industrial tests abroad and carried out industrial-scale applications, it has not been able to solve its high operating costs, complicated processes, and calci

Method used

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  • Biological extract technology for ore of cobalt nickel oxide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The new process was applied to a nickel-cobalt oxide ore in Yunnan. The metal minerals in the ore are mainly silicon-magnesium-nickel ore, followed by nickel-containing limonite. Gangue minerals are mainly olivine, serpentine, pyroxene and so on. The contents of nickel and cobalt in the ore are respectively 0.93% nickel, 0.015% cobalt and 7.09% iron.

[0024] (1) Preparation of a variety of biological organic acid mixtures

[0025] Obtaining the original species: the sugar wastewater containing Aspergillus niger was prepared through the preparation of a fungal solid medium (the fixed medium was potato sucrose medium), and the plate was drawn to obtain several bacterial colonies and various fungi. Pick the mycelium that grows black spores and carry out transfer culture.

[0026] Acquisition of exclusive bacteria: Use the improved Zabeck's liquid medium to expand the culture of fungi. The fungus is cultured in a liquid medium for 5-6 days, the culture temperature is 33...

Embodiment 2

[0036] The new process was applied to a nickel-cobalt oxide ore in Yunnan for heap leaching, and the metal minerals in the ore were the same as above.

[0037] (1) Preparation of a variety of biological organic acid mixtures

[0038] With (1) in embodiment 1.

[0039] (2) Nickel and cobalt leaching in ore

[0040] Crush the ore until the particle size is less than 10mm; then build a heap, in order to keep the ore as much as possible to form a porous and well-ventilated natural heap during the heaping process, the height of the heap is 1-3m; use (1) containing a variety of organic acid components The clear liquid is sprayed to leach ore, and the spray speed is 5-10L / m 2 .h.

[0041] (3) Dissociation of organic acid metal complexes under acidic conditions

[0042] Add dilute sulfuric acid to adjust the pH value of the solution to about 0.5-1.7, so that the metal complex of the organic acid is almost completely dissociated. If the cationic resin is too strong, the organic aci...

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Abstract

This invention relates to a biological method for leaching ores of nickel oxide and cobalt oxide. The method comprises: leaching ores of nickel oxide and cobalt oxide by using leaching organism derived organic acid, dissociating the leaching solution containing nickel and cobalt, passing through a separation resin, and separating nickel and cobalt from the eluate by a resin to obtain nickel sulfate and cobalt sulfate products. The method has such advantages as short process, simple equipment, low investment, low cost, no pollution and high recovery rate. The method can treat low-grade ores of nickel oxide and cobalt oxide that cannot be treated by traditional separation process, thus expanding the utility range of resources and increase the recovery rate of nickel and cobalt.

Description

technical field [0001] The invention relates to a biological leaching process of nickel-cobalt oxide ore, in particular to a process for leaching nickel-cobalt oxide ore using a mixture of various organic acids derived from fungi. Background technique [0002] More than 60% of the world's nickel resources are nickel oxide ore, and the associated valuable metal cobalt. The traditional nickel oxide ore treatment process can only process high-grade nickel oxide ore. The principle process is ore crushing, ore grinding, pyro-smelting or sulfuric acid high-pressure leaching. The former has shortcomings such as high energy consumption, heavy environmental pollution, and low metal recovery rate; although the latter has completed industrial tests abroad and carried out industrial-scale applications, it has not been able to solve its high operating costs, complicated processes, and calcium-magnesium sulfate. And many other problems, and the use of traditional technology to develop lo...

Claims

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Application Information

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IPC IPC(8): C22B3/18C22B23/00
CPCY02P10/20
Inventor 温建康阮仁满刘学宋永胜董清海姚国成
Owner 有研资源环境技术研究院(北京)有限公司
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