The electromagnetic dry powder magnetic separator is used for deep iron
removal of micro powder materials in quartz sand dry purification, but frequent
shutdowns caused by coil overheating are a concern for many customers. As the
temperature of the coil increases, the magnetic field strength decreases,
greatly reducing the iron removal effect and even burning the coil in severe
cases.
The main cause of coil overheating is poor cooling water flow.
Electromagnetic coils rely on circulating water to carry away heat. When the
water quality is unclean or left uncleaned for a long time, scaling and
impurities deposit on the inner wall of the waterway, causing the water flow to
decrease and the heat transfer efficiency to decrease. It is recommended to
check the cooling water flow once a month and touch the temperature difference
between the inlet and outlet pipes with your hands. If the temperature
difference is too small, it indicates poor heat transfer efficiency. When
cleaning the waterway, first blow it with compressed air, and stubborn scale can
be dissolved by soaking it in a special cleaning agent. If conditions permit,
the open water cooling system can be replaced with a closed loop cooling system
to isolate impurities from the source.
The coil cannot withstand long-term overload operation. When the feeding
amount exceeds the design processing capacity, the coil needs to continuously
output higher excitation current to maintain the magnetic field strength, and
the heat generation increases accordingly. Check the reading of the ammeter. If
it continues to exceed the rated value by more than 10%, it indicates that the
equipment has been in an overloaded state for a long time. The feeding amount
should be appropriately reduced or the number of magnetic separators should be
increased to disperse the load.
Pay attention to the temperature control instrument during daily operation.
When the temperature approaches the warning value, immediately reduce the load
or stop the machine for heat dissipation. When the coil temperature is stably
controlled below 40 ℃, the equipment operates most reliably. Shanlu Heavy
Industry can provide selection suggestions for electromagnetic dry powder
magnetic separators based on customer material characteristics and production
capacity requirements. For equipment operation related issues, please feel free
to contact the technical team of Shandong Heavy Industry: Manager Zhang at
13583776655 (same as WeChat).