Biological selectivity leaching method of low-grade copper-cobalt ore

A low-grade and selective technology, applied in the field of microbial metallurgy, can solve the problems of loss of cobalt, difficult enrichment and recovery of cobalt, lack of cobalt recovery system, etc., and achieve the effect of short process flow, efficient recovery and simple equipment

Active Publication Date: 2014-02-12
NORTHEASTERN UNIV
View PDF6 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some cobalt-bearing sulfide ores use the traditional sulfur concentrate roasting to produce acid-slag leaching cobalt extraction process. For example, Qinghai Delni Copper-Cobalt Mine adopts the flotation-sulfur concentrate acidification roasting process to extract cobalt. Sulfuric acid is useless in this process. And air sulfur dioxide pollution is quite serious. More importantly, the direction of cobalt in the smelting process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Biological selectivity leaching method of low-grade copper-cobalt ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) The low-grade copper-cobalt ore is crushed and ground to a particle size ≤74μm, accounting for 50% of the total flotation concentrate; the copper-cobalt ore is 0.05% cobalt content and 10.00% copper content. Copper exists in the form of chalcopyrite, and cobalt exists in the form of sulphur cobalt.

[0021] (2) The mixed bacterial liquid containing Microspirillum ferrooxidans, Thiobacillus ferrooxidans and Thiobacillus acidophilus is inoculated into 9K medium in an oxidation tank equipped with a stirring device for cultivation. The amount of inoculation is based on the volume ratio: culture medium=1:10, aerated and stirred, aerated amount of 0.1 m 3 / h, the stirring rate is 600 rpm, the culture temperature is 44°C, the pH value of the culture solution is 1.0, and the culture time is 24 hours.

[0022] (3) Add the copper-cobalt ore to the bacterial culture solution to make the mass concentration of the ore powder 25%, fill with air and stir, and the aeration volume is 0.1...

Embodiment 2

[0027] (1) The copper-cobalt ore is crushed and ground to a particle size ≤74μm, accounting for 65.4% of the total flotation concentrate; the copper-cobalt ore contains 2% cobalt and 18.00% copper, of which copper is It exists in the form of chalcopyrite, and cobalt exists in the form of sulphur copper cobalt.

[0028] (2) The mixed bacterial liquid containing Microspirillum ferrooxidans, Thiobacillus ferrooxidans and Thiobacillus acidophilus is inoculated into 9K medium in an oxidation tank equipped with a stirring device for cultivation. The volume ratio of inoculation is as follows: strain: culture medium=1:15, aerated and stirred, aerated amount is 0.2m 3 / h, the stirring rate is 1000 revolutions per minute, the culture temperature is 52°C, the pH value of the culture solution is 1.5, and the culture time is 24 hours.

[0029] (3) Add copper-cobalt ore to the bacterial culture solution to make the mass concentration of ore powder 20%, inflate and stir with air, the aeration vol...

Embodiment 3

[0034] (1) The copper-cobalt ore is crushed and ground to a particle size ≤74μm, accounting for 78% of the total flotation concentrate; the copper-cobalt ore contains 1.05% cobalt and 25% copper, of which copper is It exists in the form of chalcopyrite, and cobalt exists in the form of arsenite.

[0035] (2) The mixed bacterial liquid containing Microspirillum ferrooxidans, Thiobacillus ferrooxidans and Thiobacillus acidophilus is inoculated into 9K medium in an oxidation tank equipped with a stirring device for cultivation. The volume ratio of inoculation is as follows: strain: culture medium=1:20, aerated and stirred, aerated amount 0.3m 3 / h, the stirring rate is 1400 revolutions per minute, the culture temperature is 60°C, the pH value of the culture solution is 2.0, and the culture time is 24 hours.

[0036] (3) Add the copper-cobalt ore to the bacterial culture solution to make the mass concentration of the ore powder 18%, fill with air and stir, and the aeration volume is 0....

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a biological selectivity leaching method of low-grade copper-cobalt ore, and belongs to the field of microbial metallurgy. The biological selectivity leaching method comprises the following steps: the copper-cobalt ore is crushed and grinded; a mixed bacterium liquid containing ferrous oxide micro spirilla, acidophilic thiobacillus ferrooxidans and acidophilic thiobacillus thiooxidans is introduced to a 9 K of culture medium for cultivating to obtain a bacterium culture solution. The copper-cobalt ore is added to the bacterium culture solution to conduct bacterium leaching on the cobalt concentrate; when the leaching rate of cobalt in the bacterium leaching liquid reaches above 97%, the leaching liquid containing valuable metal ions such as cobalt and copper is separated from the leaching residue; then Lix984N extraction agent is adopted to extract copper to obtain a copper product; the raffinate from which the copper is extracted is subjected to precipitation and iron removing treatment by a jarosite process to obtain an iron product; cobalt-containing liquid after being subjected to iron removal is crystallized to obtain a cobalt oxalate product. The biological selectivity leaching method has the advantages of short technique flow, easy operation, simple equipment, low energy consumption, no high-temperature smelting, no emission of pollutant smoke and poisonous gas, and quick achievement of separation and efficient recovery of cobalt and other valuable metals.

Description

Technical field [0001] The invention belongs to the field of microbial metallurgy, and particularly relates to a method for bioselective leaching of low-grade copper-cobalt ore. Background technique [0002] Cobalt is an important strategic rare metal with excellent physical, chemical and mechanical properties. It is an important material for manufacturing high-strength alloys, high-temperature alloys, hard alloys, magnetic materials and catalysts. By 2008, the world's cobalt consumption will reach 8700t, and the world's cobalt consumption will be about 8000~10000t in the next few years. At present, the annual consumption of cobalt powder in my country is 2500~2800t, and its consumption areas are mainly special steel, cemented carbide, diamond tools and petrochemical catalysts. [0003] The world's cobalt reserves are 4 million tons and the resources are 8.8 million tons. Most of the cobalt resources are distributed in cobalt-bearing laterite-type nickel deposits, and most of the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22B3/18C22B23/00C22B15/00
CPCY02P10/20
Inventor 杨洪英佟琳琳刘伟骆新耿刘媛媛朱景和
Owner NORTHEASTERN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap