The dry magnetic separator used in NMC Battery cathode materials
has increased the separation efficiency of iron impurities by 20%
The separation principle of cathode materials for ternary lithium
batteries by dry powder magnetic separators
The cathode materials of ternary lithium batteries are usually
composed of metal oxides such as nickel cobalt manganese (NCM) or
nickel cobalt aluminum (NCA). During the production process, some
magnetic impurities may be mixed in, such as metal particles like
iron and cobalt or their oxides. These magnetic impurities have a
certain degree of magnetism, while the cathode materials of ternary
lithium batteries themselves are generally weakly magnetic or
non-magnetic substances.
The JC dry powder magnetic separator is mainly composed of the
magnetic system, drum, feeding device and discharging device, etc.
When the dry powder of the cathode material of ternary lithium
batteries containing magnetic impurities enters the magnetic field
area of the magnetic separator, due to the effect of the magnetic
field, the magnetic impurities will be attracted by the magnetic
force and move towards the area with a higher magnetic field
intensity. Non-magnetic or weakly magnetic cathode materials for
ternary lithium batteries are not significantly affected by the
magnetic field and continue to move along their original
trajectories. In this way, magnetic impurities are separated from
the cathode material of ternary lithium batteries. For instance, in
the production of lithium batteries with ternary lithium materials
and other positive electrodes, dry magnetic separators can
effectively remove impurities such as iron filings and iron powder
that are mixed in during raw material processing and mixing.
Why is a dry powder magnetic separator used for the purification of
cathode materials in ternary lithium batteries
The cathode materials of ternary lithium batteries are usually in
the form of dry powder. The dry powder magnetic separator is
specially designed for dry powder materials and can directly
process dry powder cathode materials without additional
pretreatment or conversion processes, simplifying the process flow
and improving production efficiency.
After a certain ternary Lithium (NMC Lithium) cathode material
manufacturer in China applied JC's dry magnetic separator, while
ensuring that the purity of the output after separation reached
99.99%, the separation capacity was increased by 20%, helping the
user achieve a 190% increase in output value from 2020 to 2023.
Improvement and Benifit
Ensure the purity of the product: The dry magnetic separator can precisely control the magnetic
field intensity and material flow rate. According to the
characteristics of different lithium battery cathode materials and
impurity content, it can flexibly adjust the circuit and magnetic
field parameters to achieve efficient removal of magnetic
impurities and ensure the purity of the product.
More reliable mechanical structure: Dry separation equipment faces challenges of vibration and sealing
in practical applications. JC ensures sealing by improving the
pipeline structure and eliminates pipeline leakage. Moreover, JC
adopts exclusive customized shock absorption and buffering
components, fundamentally reducing the vibration of the dry
magnetic separator and increasing the trouble-free operation time
of the equipment.
