Device for removing magnetic foreign matter

Abstract

Provided is a device (10) for removing magnetic foreign objects, comprising: a housing (11); a feeding unit (12) disposed in an upper portion of the housing (11) for allowing liquid material to enter the housing (11); a magnetic baffle assembly (13) mounted in the housing (11), comprising at least one first magnetic baffle (13a) and at least one second magnetic baffle (13b) mounted on an inner side of a top wall of the housing (11); a discharging unit (14); a washing unit (15), comprising at least one elastic inflatable membrane (15a) sleeved on and attached to each of the first magnetic baffle (13a) and the second magnetic baffle (13b), a gas charge / deflation member (15b) mounted on the housing (11) and communicated with the inflatable membrane (15a), for inflating and deflating the inflatable membrane (15a), and an ultrasonic vibration member (15c) mounted on the housing (11) for generating a ultrasonic vibration; and a liquid discharge unit (16) provided at a bottom of the housing (11) for discharging cleaning liquid after cleaning the magnetic foreign objects removing device (10). The magnetic foreign objects removing device (10) improves the effect of removing magnetic foreign objects and cleaning efficiency, and protects the magnetic baffle assembly (13) from corrosion and damage.

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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