Method and equipment for immersion cleaning of ternary precursor

Abstract

The invention discloses a method and equipment for rinsing a ternary precursor. According to the method, soluble impurity ions in a ternary precursor material are removed through ultrasonic vibration. Soluble impurity ions in a precursor are mainly reduced, ultrasonic vibration is utilized, the kinetic energy of the soluble ions in the ternary precursor is improved, the movement mode of the ions is changed, and the movement rate between molecules is enhanced, so that the soluble ions in the ternary precursor are removed, on one hand, the number of impurities is greatly reduced, and the structural stability of the positive electrode material is improved; the SO2 emission in the preparation process of the positive electrode material is reduced, and the ternary lithium battery with high safety is obtained; on the other hand, ultrasonic vibration immersion cleaning is adopted, compared with an existing method, the dilute alkali consumption is reduced by 0.25-0.875 m < 3 > per ton of products, pure water is saved by 1 m < 3 > per ton of products, the annual capacity of enterprises with the top five ranks in the precursor industry is 5-10 thousand tons, according to the method, pure water can be saved by 5-10 thousand tons, and dilute alkali can be saved by 1.25-875 thousand tons every year, the production cost is greatly reduced, and the wastewater treatment capacity is reduced.

Description

technical field [0001] The invention relates to the field of manufacturing ternary positive electrode materials, in particular to a method and equipment for soaking a ternary precursor. Background technique [0002] With the development of the new energy automobile industry, users have higher and higher requirements for the safety performance of ternary lithium batteries, and battery factories have higher and higher requirements for precursor indicators. Under the trend of high-nickel products, the precursor industry and lithium battery cathode preparation industry mass-produce NCM6 series, NCM8 series, or higher 9 series. Although the battery capacity is improved, the battery safety performance cannot be guaranteed. Only precursors with low magnetic foreign matter and low impurity content can guarantee the safety performance of lithium batteries. [0003] Preparation principle of ternary precursor: xNiSO 4 +yCoSO 4 +zMnSO 4 +2NaOH=1Ni x co y mn z (OH) 2 +Na 2 SO ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to: in the existing ternary precursor preparation process that exists in the prior art, produce a large amount of by-product sodium sulfate, existing technology removes the sodium sulfate in the nickel-cobalt-manganese hydroxide, needs to use a large amount of when washing Pure water and dilute alkali also produce a large amount of waste water that needs to be treated, which increases the production cost. A method and equipment for soaking ternary precursors are provided

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