Apparatus for removing magnetic foreign matters

Abstract

The invention provides an apparatus for removing magnetic foreign matters. The apparatus is characterized by having a shell, a feeding unit, a magnetic baffle plate assembly, a discharging unit, a washing unit and a liquid discharging unit, wherein the feeding unit is arranged on the upper part of the shell and used for a liquid material to enter the shell; the magnetic baffle plate assembly is installed in the shell and comprises at least one first magnetic baffle plate and at least one second baffle plate which are installed at the inner side of the top wall of the shell; the washing unit comprises at least one elastic inflatable membrane which sleeves on and is fit to each of the first magnetic baffle plate and second magnetic baffle plate, an inflation / deflation component which is installed on the shell, communicated with the inflatable membrane and used for inflating and deflating the inflatable membrane, and an ultrasonic vibration component which is installed on the shell and used for producing ultrasonic vibration; and the liquid discharging unit is arranged at the bottom of the shell and used for discharging washing liquid after washing the apparatus for removing the magnetic foreign matters. By adopting the apparatus for removing the magnetic foreign matters, the magnetic foreign matters removal effect and the washing efficiency can be improved, and the corrosion resistance is good.

Description

technical field [0001] The invention relates to a device for removing magnetic foreign matter in liquid materials such as solution and slurry. Background technique [0002] With the development of new energy sources, battery materials have become a hot topic in research. In addition to the impact of particle size and density of battery materials on performance, the existence of magnetic foreign matter has brought great hidden dangers to the safety performance of lithium batteries. The control of foreign matter is the key to solve the safety problem of lithium-ion batteries. [0003] At present, the magnetic foreign matter of battery materials is generally controlled within 50ppb, while the positive electrode materials such as NCA used in Tesla require magnetic foreign matter to be controlled within 10ppb. However, at present, the removal of magnetic foreign matter from battery materials is generally only concerned with post-processing processes such as drying, screening and...

AI Technical Summary

Problems solved by technology

However, at present, the removal of magnetic foreign matter from battery materials generally only focuses on the post-treatment processes such as drying, screening and packaging, and the removal of magnetic foreign matter in the way of pollution and retreatment is poor in effect, large in material loss, and low in yield.

[0004] In order to improve the demagnetization effect, a permanent magnet iron remover is generally installed in the liquid delivery pipeline, but the existing permanent magnet iron remover is several magnetic rods arranged in a staggered manner. The surface of the magnetic rods is generally made of stainless steel, and the solution (especially Acid and alkali) long-term contact will cause corrosion and introduce magnetic variation; when cleaning the magnetic rod, it is necessary to stop the machine, take out the magnetic rod, and then rinse it with a large amount of water, which is inefficient, affects the production process, and causes a lot of waste of water resources

In addition, the contact area of ​​the magnetic rod is small, and there are still some flow blind areas in the device, which affect the effect of demagnetization to varying degrees.

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