When thetransformer scrap sheets and silicon sheets are in operation, the silicon steel sheet to be annealed is placed in the iron box (according to the size of the silicon steel sheet, please note that the packing is not more than three layers), and each box of silicon steel sheet is covered with a slightly smaller than iron box. The cover plate (made of a good 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.
Connect the transformer scrap sheets and silicon sheets 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.
Connect the transformer scrap sheets and silicon sheets to the connection of the nitrogen tube and the inflation valve, open the inflation valve, and 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.
The transformer scrap sheets and silicon sheets set the initial temperature of the temperature control table to 400 ° C, check whether the currents of the power meter are consistent, and after ensuring the adjustment is consistent, 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.