Method for separating nickel-cobalt and manganese in nickel-cobalt-manganese material with high manganese-cobalt ratio
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A nickel-cobalt-manganese and nickel-cobalt-manganese lithium technology, which is applied in the fields of hydrometallurgy and chemical production, can solve the problems of low nickel-cobalt recovery rate and the like
Active Publication Date: 2013-05-08
GANZHOU HIGHPOWER TECH CO LTD
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[0003] The traditional high manganese-cobalt ratio nickel-cobalt-manganese separation method of nickel-cobalt and manganese raw materials, nickel-cobalt recovery rate is low
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Embodiment 1
[0058] Cobalt nickel manganese raw material (Co 13.8%, Ni 12.9%, Cu 0.36%, Mn 10.16%, Zn 1.23%, Fe1.15%, Pb 0.21%, Si 0.13%, Ca 0.21%, Mg 0.66%), with H 2 SO 4 +Na 2 SO 3 (Na 2 SO 3 1.5~1.6 times the theoretical amount) leaching, liquid-solid ratio 8kg / 1kg, temperature 75°C, stirring time 2.5h, Na 2 CO 3 As a neutralizing agent, the end point pH is 1.5. The leaching recovery rate of cobalt was 98.71%, the leaching recovery rate of nickel was 99.12%, and the leaching recovery rate of manganese was 98.76%.
[0059] Na 2 S 2 o 8 (1.6 times the theoretical amount) is an oxidizing agent, Na 2 CO 3 As a neutralizing agent, the temperature is 75°C, the stirring time is 1.5hr, and the final pH is 4.5 to precipitate and remove manganese. The precipitation removal rate of manganese was 99.32%, and the leaching recovery rate of cobalt was 99.13%. The leaching recovery rate of nickel was 99.53%.
[0060] After the cobalt and manganese are separated, the nickel-cobalt sulfate...
Embodiment 2
[0062] Waste nickel-cobalt-manganese ternary secondary battery cathode material (Li 6.99%, Co 4.82%, Ni 12.11%, Cu 0.01%, Mn 6.61%, Zn 0.02%, Fe 0.06%, Al 3.75%, Ca 0.001%, Mg 0.001 %), with H 2 SO 4 +Na 2 SO 3 (Na 2 SO 3 1.5~1.6 times the theoretical amount) leaching, liquid-solid ratio 6kg / 1kg, temperature 75°C, stirring time 2.5h, Na 2 CO 3 As a neutralizing agent, the end point pH is 1.5. The leaching recovery rate of cobalt was 98.68%, the leaching recovery rate of nickel was 99.33%, and the leaching recovery rate of manganese was 98.71%.
[0063] For leachate (NH 4 ) 2 S 2 o 8 (1.6 times the theoretical amount) is an oxidizing agent, Na 2 CO 3 As a neutralizing agent, the temperature is 75°C, the stirring time is 1.5hr, and the final pH is 4.5 to precipitate and remove manganese. The precipitation removal rate of manganese was 99.63%, and the leaching recovery rate of cobalt was 98.18%. The leaching recovery rate of nickel is 98.67%.
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Abstract
The invention discloses a method for separating nickel-cobalt and manganese in a nickel-cobalt-manganese material with a high manganese-cobalt ratio. The method comprises the following steps of: providing a nickel-cobalt-manganese material with the high manganese-cobalt ratio of 0.5-1.2; mixing the nickel-cobalt-manganese material with the high manganese-cobalt ratio with a mixed solution of dilute sulphuric acid and sodium sulfite; adjusting the final-point pH of the solution to 0-3.5; filtering and retaining first filtrate after the sufficient reaction; adding soluble persulfate to the first filtrate, adjusting the final-point pH of the mixed solution to 2-6; and filtering after the sufficient reaction to obtain second filtrate containing nickel sulfate and cobalt sulfate. According to the method for separating nickel-cobalt and manganese in the nickel-cobalt-manganese material with high manganese-cobalt ratio disclosed by the invention, the manganese is separated from nickel-cobalt in the solution by reducing and leaching out the nickel-cobalt-manganese from the mixed solution of the dilute sulphuric acid and the sodium sulfite, and then oxidizing and settling the manganese by adopting the soluble persulfate; compared with the conventional separating method for nickel-cobalt and manganese in the nickel-cobalt-manganese material, the process is simple and easy to apply, the production cost is low and the nickel-cobalt recovery rate is high.
Description
technical field [0001] The invention relates to the technical fields of hydrometallurgy and chemical production, in particular to a method for separating nickel, cobalt and manganese from nickel-cobalt-manganese raw materials with a high cobalt-manganese ratio. Background technique [0002] As a new type of battery cathode material, lithium nickel cobalt manganese oxide is gradually replacing the high-cost lithium cobalt oxide cathode material for lithium-ion secondary batteries used in electric tools, electric bicycles and electric vehicles. A large amount of waste pole pieces, waste batteries and waste nickel-cobalt lithium manganate ion batteries produced in the process of manufacturing nickel-cobalt-lithium manganese oxide contain a large amount of valuable metals such as nickel and cobalt, which have great recycling value. Moreover, there are also a large amount of manganese-cobalt-containing raw materials or waste materials at home and abroad. Effective separation of ...
Claims
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