The battery grade LITHIUM carbonate raw MATERIAL is screened 150 mesh, under the sieve, PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC removal of iron lithium carbonate for use; The 3kg ternary precursor ni0.5co0.2mn0.3(oh)2 was weighed, and the weight of lithium carbonate was calculated and weighed according to the ratio of molar ratio li (ni+co+mn) =1.05. The titanium content of nano-grade titanium dioxide was calculated according to 0.5% of the content of metal elements, and then converted to the weight of titanium dioxide. The ingredients weighing lithium carbonate, ternary precursor and titanium dioxide, in turn into the high-speed mixer mixing, low speed mixing for 20 minutes, high-speed mixing for 60 minutes, after mixing check no white spots, that is, mixed evenly, the mixture;
The uniformly mixed raw material is used in roller kiln for primary sintering, and the primary sintering is set in three temperature zones, that is, the temperature holding and sintering at 750℃ for 9 hours and the temperature holding and sintering at 900℃ for 16 hours. The temperature gradient transition is done in the heating zone and each temperature stage, and the purified air is continuously injected. Then the semi-finished product is crushed, graded and screened, PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC field, control particle size d50=10~12um;
Then add the broken material to the pulping kettle for pulping and washing, add 3kg of material, add 15kg of pure water, stir for 30 minutes, filter, recycle the filtrate, add pure water with the ratio of mass ratio of material: water = 1:3, and wash and filter for 5 times; Finally, the filter cake was dried, PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC, drying time was 8 hours, drying temperature was 130℃.
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