Cold rolled ei type silicon steel core in the process of working, the annealed silicon steel sheet is loaded into the iron box (according to the size of the silicon steel sheet, please note that the packing should not exceed three layers), and each box of silicon steel sheet is covered with a slightly smaller than iron box. The cover plate (made of silicon steel sheet material) is hoisted into the furnace, the furnace cover is locked, the sealing ring is pressed, and the circulating water pipe is connected.
Cold rolled ei type silicon steel core is connected to nitrogen, check for leaks, and check the normal supply of circulating water. Close all valves, install the vacuum tube, open the vacuum pump, open the vacuum valve, vacuum to -1MPA, close the needle valve and then turn off the vacuum pump.
The cold rolled ei type silicon steel core is connected to the inflation valve to a certain extent, and the inflation valve is opened to inject nitrogen. The pressure is between 0.03~0.1MPA, close the inflation valve to open the safety valve. Install the three thermocouples on the furnace body to check whether the voltage, current and instrument of the electrical cabinet are normal.
Set the initial temperature of the temperature control table to 400 °C, check whether the currents of the power meter are the same. After ensuring the adjustment, turn on the heating switch to heat. At this point, the valve for circulating water is opened to ensure that there is no blockage to ensure smooth water flow