Title:
METHOD FOR RECYCLING MULTIPLE VALUABLE METALS FROM LATERITIC NICKEL ORE AND REGENERATION CYCLE OF ACID-ALKALINE DOUBLE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2022/036775
Kind Code:
A1
Abstract:
A method for recycling multiple valuable metals from lateritic nickel ore and regeneration cycle of an acid-alkali double medium, comprising: first, finely grinding raw lateritic nickel ores to obtain ore powder, configuring the ore powder into slurry and then performing nitric acid leaching on same, and performing a pelletized sintering process on leach residues to obtain iron ore concentrate; adjusting a pH value of a leach solution, completely precipitating aluminum, nickel, cobalt, manganese, scandium, and a small amount of iron, and dissolving precipitates using alkali to separate aluminum; performing acidolysis on a mixture of nickel, cobalt, manganese, and scandium precipitates, then performing fractional extraction on the mixture to obtain scandium, nickel, cobalt, and manganese products; and concentrating, by evaporation, a magnesium nitrate solution obtained after aluminum, nickel, cobalt, manganese, and scandium are precipitated to obtain a magnesium nitrate crystal for subsequently decomposing magnesium nitrate and regenerating to obtain acid and alkali, thereby achieving regeneration cycle of an acid-alkali double medium. The method avoids, in a process of adding an alkaline substance to a lateritic nickel ore acid leach solution to precipitate aluminum for separating aluminum from nickel and cobalt, the problems that during recycling, the filterability is poor and nickel and cobalt metals are included in aluminum slags due to the generation of flocculent aluminum hydroxide precipitates, such that a total recovery rate of nickel and cobalt metals is improved.
Inventors:
WANG CHENGYAN (CN)
MA BAOZHONG (CN)
ZHAO LIN (CN)
CHEN YONGQIANG (CN)
DAN YONG (CN)
JIN CHANGHAO (CN)
ZHAO PENG (CN)
GAO BO (CN)
ZHAO DING (CN)
JIANG JING (CN)
MA BAOZHONG (CN)
ZHAO LIN (CN)
CHEN YONGQIANG (CN)
DAN YONG (CN)
JIN CHANGHAO (CN)
ZHAO PENG (CN)
GAO BO (CN)
ZHAO DING (CN)
JIANG JING (CN)
Application Number:
PCT/CN2020/114550
Publication Date:
February 24, 2022
Filing Date:
September 10, 2020
Export Citation:
Assignee:
SICHUAN SHUNYING POWER BATTERY MAT CO LTD (CN)
International Classes:
C22B3/06; C22B3/04; C22B3/12; C22B3/26
Foreign References:
| CN102115816A | 2011-07-06 | |||
| CN103468980A | 2013-12-25 | |||
| CN102534206A | 2012-07-04 | |||
| CN108950205A | 2018-12-07 | |||
| CN109052492A | 2018-12-21 | |||
| EP1900831A1 | 2008-03-19 |
Other References:
WANG, CHENGYAN ET AL.: "Nitric Acid Pressure Leaching of Laterite Ores", THE CHINESE JOURNAL OF PROCESS ENGINEERING = GUOCHENG GONGCHENG XUEBAO, vol. 19, no. Supplement 1, 30 June 2019 (2019-06-30), CN , pages 51 - 57, XP009534578, ISSN: 1009-606X
Attorney, Agent or Firm:
BEIJING GUANGYOU PATENT FIRM CO., LTD (CN)
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