Method of utilizing microorganism to extract metal nickle in laterite

The invention discloses a method of utilizing microorganism to extract metal nickle in laterite, belongs to the field of extraction of metal nickle, and aims to solve the problems that plenty of pollution is generated and plenty of energy sources are consumed in the existing production technology. T...

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Bibliographische Detailangaben
Hauptverfasser: HAN ZHIWEI, SHANG YAWEN, LI REN, WANG XUEZHE, CHI PIHUA, ZHANG CHUNSHENG
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention discloses a method of utilizing microorganism to extract metal nickle in laterite, belongs to the field of extraction of metal nickle, and aims to solve the problems that plenty of pollution is generated and plenty of energy sources are consumed in the existing production technology. The method comprises the following steps: grinding laterite into mineral powder, wherein the particlesize of more than 90% of the mineral powder is minus 200 meshes, adding water in the mineral powder to obtain ore pulp with the concentration being 5-20%, adding aspergillus niger strain after cultivation and acclimatization in the ore pulp to obtain an ore pulp mixture, stirring the ore pulp mixture at 20-40 DEG C, and leaching for more than two days; after leaching, filtering the obtained microbiological leaching solution to obtain liquid, adjusting pH to 2.0 at 55-65 DEG C, after impurity removal, adding sodium hypochlorite while stirring, adding NaOH solution to adjust pH to be 12.0, carrying out sedimentation on