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A kind of biological and chemical synergistic leaching method of weathering crust leaching type rare earth ore

A weathered shell leaching type, microbial leaching technology, applied in the direction of improving process efficiency, can solve the problems of low leaching rate and long leaching period, and achieve the effects of efficient extraction, shortening leaching period and simple operation

Active Publication Date: 2022-04-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, bioleaching methods for weathering crust elution-type rare earth ores have rarely been reported.
And at present, bioleaching generally has low leaching rate and long leaching cycle defects in the field of nonferrous metallurgy. Therefore, how to apply bioleaching to weathering crust leaching type rare earth ores and how to improve the leaching effect has good research and application. prospect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Inoculate Yarrowia lipolytica (purchased Yarrowialipolytica ATCC 30162) into energy substance-rare earth minerals-chemical cationic leaching agent compound medium (glucose 300g / L, urea 0.2g / L, KH 2 PO 4 0.64g / L, corn steep liquor 7.2g / L, CaCO 3 20g / L, MgSO 4 ·7H 2 O 0.2g / L, rare earth mineral 3.0g / L, ammonium sulfate 3.0g / L) carried out domestication and cultured for 7 days, then the Yarrowia lipolytica after the domestication was in common medium (glucose 300g / L, urea 0.2g / L, KH 2 PO 4 0.64g / L, corn steep liquor 7.2g / L, CaCO 3 20g / L, MgSO 4 ·7H 2 (0.2g / L) was expanded and cultivated for 7 days, and the bacterial suspension obtained was used as a microbial leaching agent (bacterial concentration was not less than 1.0×10 7 individual / mL). Ammonium sulfate is added to the microbial leaching agent to form a mixed leaching agent with an ammonium ion concentration of 0.02mol / L; then, according to the leaching liquid-solid ratio of 5:1, the ore is leached with th...

Embodiment 2

[0029] Penicillium oxalicum (Penicillium oxalicum ATCC 28771 purchased) was inoculated into energy substance-rare earth minerals-chemical cationic leaching agent compound medium ((NH 4 ) 2 SO 4 0.5g / L,NaCl 0.2g / L,KCl0.2g / L,MgSO 4 ·7H 2 O 0.03g / L, MnSO 4 0.03g / L,FeSO 4 0.003g / L, yeast powder 0.5g / L, glucose 10.0g / L, tricalcium phosphate 5.0g / L, rare earth minerals 3.0g / L), domesticated and cultivated for 10 days, and then the domesticated Penicillium oxalicum Base (NaCl 0.2g / L, KCl 0.2g / L, MgSO 4 ·7H 2 O0.03g / L, MnSO 4 0.03g / L,FeSO 4 0.003g / L, yeast powder 0.5g / L, glucose 10.0g / L, tricalcium phosphate 5.0g / L) for 7 days, and the obtained bacterial suspension was used as a microbial extraction agent (bacterial concentration not less than 1.0×10 7individual / mL). Add magnesium chloride to the microbial leaching agent to form a mixed leaching agent with a magnesium ion concentration of 0.04mol / L; then, according to the leaching liquid-solid ratio of 4:1, the ore is l...

Embodiment 3

[0036] Inoculate Bacillus subtilis (purchased Bacillus subtilisATCC6633) into energy substance-rare earth minerals-chemical cationic leaching agent compound medium (sucrose 50g / L, sodium glutamate 25.4g / L, yeast extract 6.7g / L, NaCl10g / L ,KH 2 PO 4 5g / L,MgSO 4 2.4g / L, CaCl 2 0.3g / L, MnSO 4 0.1g / L, rare earth minerals 3.0g / L), domesticated and cultivated for 10 days, and then the Bacillus subtilis after domesticated in common medium (sucrose 50g / L, sodium glutamate 25.4g / L, yeast extract 6.7g / L,NaCl 10g / L,KH 2 PO 4 5g / L, CaCl 2 0.3g / L, MnSO 4 0.1g / L) was expanded and cultured for 7 days, and the obtained bacterial suspension was used as a microbial leaching agent (the bacterial concentration was not lower than 1.0×10 7 individual / mL). Add magnesium sulfate to the microbial leaching agent to prepare a mixed leaching agent with a magnesium ion concentration of 0.06mol / L; then, according to the leaching liquid-solid ratio of 6:1, the ore is leached with the mixed ...

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Abstract

The invention discloses a biological and chemical synergistic method for leaching weathering crust leaching type rare earth ore, which comprises the following steps: 1) preparation of microbial leaching agent; 2) chemical cationic salt leaching agent; 3) leaching. In the bioleaching process, the chemical leaching agent is used in combination, and the synergistic effect of the biological and chemical leaching agents is used to realize the high-efficiency extraction of rare earths, which effectively overcomes the problem of low bioleaching efficiency; the microorganisms used in the present invention exist widely in nature and have green The advantages of environmental protection and low cost, microorganisms and leaching agent components are conducive to ecological restoration and improvement; the method of biological and chemical synergistic leaching of weathering crust leaching type rare earth ores of the present invention reduces the amount of chemical leaching agents used, and is effective in alleviating environmental pollution. The clean and efficient extraction of rare earths has been realized under the premise.

Description

technical field [0001] The invention belongs to the fields of hydrometallurgy and mineral processing, and in particular relates to a biological and chemical synergistic leaching method for weathering crust leaching type rare earth ore. Background technique [0002] There are 17 rare earth elements, including 15 lanthanide elements and yttrium and scandium elements with similar chemical properties. They have a series of characteristics such as excellent mechanical properties, magnetic properties and optical properties, so they are very important in modern industry and defense industry. At present, more than 250 kinds of rare earth minerals have been found, but only a few of them have realized the industrial application of extraction and processing, including three types of rare earth minerals (bastnasite, monazite) , xenotime (xenotime)) and weathering crust leaching type rare earth ore (ionic rare earth ore). The weathering crust elution-type rare earth deposits are curren...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B59/00C22B3/04C22B3/18
CPCC22B59/00C22B3/18C22B3/04Y02P10/20
Inventor 赵红波申丽张伊升邱冠周
Owner CENT SOUTH UNIV
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