A kind of preparation method of lithium manganate
A technology of lithium manganate and manganese powder, applied in chemical instruments and methods, manganate/permanganate, manganese compounds, etc., can solve the problems of poor high-temperature performance of lithium manganate, and achieve good mixing effect and low reaction temperature The effect of reducing and shortening the calcination time
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Embodiment 1
[0037] A kind of preparation method of lithium manganate, it is the following steps:
[0038] (1) pretreatment, the LiMnO 4 , manganese powder, nano-niobium pentoxide, nano-alumina, and boron trioxide were mixed uniformly at room temperature, then put into a planetary ball mill for ball milling for 35 minutes, cooled to room temperature, and then taken out to obtain a mixture;
[0039] (2) Reaction, put the mixed material in the rotary kiln, feed nitrogen gas so that the oxygen content in the rotary kiln is lower than 50ppm, then start to heat up to a temperature of 85°C, then maintain this temperature for calcination for 2.25 hours, and then heat up to The temperature is 155°C, maintain this temperature for calcination for 1.25 hours, then raise the temperature to 625°C, calcinate for 4 hours at this temperature, and then cool to a temperature lower than 100°C;
[0040] (3) After-treatment, the cooled material is crushed by air flow, then sieved by electromagnetic iron remov...
Embodiment 2
[0049] A kind of preparation method of lithium manganate, it is the following steps:
[0050] (1) pretreatment, the LiMnO 4 , manganese powder, nano-niobium pentoxide, nano-alumina, and boron trioxide were mixed uniformly at room temperature, then put into a planetary ball mill for ball milling for 45 minutes, cooled to room temperature, and then taken out to obtain a mixture;
[0051] (2) Reaction, put the mixed material in the rotary kiln, feed nitrogen gas so that the oxygen content in the rotary kiln is lower than 50ppm, then start to heat up to a temperature of 83°C, then maintain this temperature for calcination for 2.4 hours, and then heat up to The temperature is 157°C, maintain this temperature for calcination for 1.3 hours, then raise the temperature to 640°C, calcine for 3.5 hours at this temperature, and then cool to a temperature lower than 100°C;
[0052] (3) After-treatment, the cooled material is crushed by air flow, then sieved by electromagnetic iron removal...
Embodiment 3
[0061] A kind of preparation method of lithium manganate, it is the following steps:
[0062] (1) pretreatment, the LiMnO 4 , manganese powder, nano-niobium pentoxide, nano-alumina, and boron trioxide were mixed uniformly at room temperature, then put into a planetary ball mill for ball milling for 50 minutes, cooled to room temperature, and then taken out to obtain a mixture;
[0063] (2) Reaction, put the mixed material in the rotary kiln, feed nitrogen gas so that the oxygen content in the rotary kiln is lower than 50ppm, then start to heat up to a temperature of 88°C, then maintain this temperature for calcination for 2.35 hours, and then heat up to The temperature is 158°C, maintain this temperature for calcination for 1.35 hours, then raise the temperature to 638°C, calcine for 4.5 hours at this temperature, and then cool to a temperature lower than 100°C;
[0064] (3) After-treatment, the cooled material is crushed by air flow, then sieved by electromagnetic iron remov...
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