A production system and production method for reducing the content of sodium ions and sulfate ions in the precursor of positive electrode materials
A sulfate ion and production system technology, applied in the direction of positive electrodes, battery electrodes, active material electrodes, etc., can solve the problems of high Na impurity content and insignificant effect, achieve simple production system and process, reduce chemical adsorption amount, The effect of reducing the content
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Embodiment 1
[0035] Step (1), add half a kettle of hot pure water at 60°C to the 26m³ batching kettle, add 1678.1Kg of nickel sulfate, 726.1Kg of cobalt sulfate, and 848.5Kg of manganese sulfate, stir for 3 hours and then add hot pure water to the batching kettle Set the position of the volume plate and stir for 1 hour to obtain a mixed salt solution with a concentration of 120g / L, and the molar ratio of nickel, cobalt and manganese is 5:2:3;
[0036] Step (2), set the stirring speed of the reactor to 220r / min, add hot water at 60°C to the full kettle, set the temperature of the reactor to 65°C, control the temperature of the reactor at 65°C during the process, add ammonia water, and test the reaction by titration Ammonia concentration in the kettle, stop adding ammonia water when the ammonia concentration reaches 7.8g / L, add sodium hydroxide solution, control the pH value, stop adding alkali when the measured pH value reaches 10.8;
[0037] Step (3), feed the mixed salt solution at a flow...
Embodiment 2
[0048] Step (1), add half a pot of 70°C hot pure water to the 26m³ batching kettle, add 1678.1Kg of nickel sulfate, 726.1Kg of cobalt sulfate, and 848.5Kg of manganese sulfate, stir for 3 hours and then add hot pure water to the batching kettle Set the position of the volume plate and stir for 1 hour to obtain a mixed solution with a concentration of 120g / L and a nickel-cobalt-manganese ratio of 5:2:3;
[0049] Step (2), set the stirring speed of the reactor to 220r / min, add hot water at 70°C to the full kettle, set the temperature of the reactor to 70°C, control the temperature of the reactor at 70°C during the process, add ammonia water, and test the reaction by titration Ammonia concentration in the kettle, stop adding ammonia water when the ammonia concentration reaches 8.0g / L, add sodium hydroxide solution, control the pH value, stop adding alkali when the measured pH value reaches 11.0;
[0050] Step (3), feed the mixed salt solution at a flow rate of 320L / h, and start f...
Embodiment 3
[0061] Step (1), add half a pot of hot pure water at 65°C to the 26m³ batching kettle, add 1678.1Kg of nickel sulfate, 726.1Kg of cobalt sulfate, and 848.5Kg of manganese sulfate, stir for 3 hours and add hot pure water again to reach the batching kettle Set the position of the volume plate and stir for 1 hour to obtain a mixed solution with a concentration of 120g / L and a nickel-cobalt-manganese ratio of 5:2:3;
[0062] Step (2), set the stirring speed of the reactor to 220r / min, add hot water at 65°C to the full kettle, set the temperature of the reactor to 65°C, control the temperature of the reactor at 65°C during the process, add ammonia water, and test the reaction by titration Ammonia concentration in the kettle, stop adding ammonia water when the ammonia concentration reaches 8.5g / L, add sodium hydroxide solution, control the pH value, stop adding alkali when the measured pH value reaches 11.2;
[0063] Step (3), feed the mixed salt solution at a flow rate of 350L / h, a...
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