The factors that affect the service life of crucible in induction melting furnace are as follows

1. Lining refractory

2. Furnace laying process

The quality of laying furnace is of great significance to the life and safety of furnace. When laying the furnace, first check whether the coil is damaged, if so, brush insulating paint on the damaged part to repair it; then use glass mixed with fire-resistant mud to repair the furnace wall, and clean the furnace wall and bottom; successively lay mica plate, alarm stainless steel net and asbestos cloth cut according to the size in advance; connect the alarm stainless steel net with copper core wire to pass out of the furnace coil, and then lay three expansion rings The lower, middle and top of the furnace wall of asbestos cloth should be tightened; the paved furnace should be well covered to avoid sundries falling into it.

3. Furnace building technology

4. Oven drying process

Oven drying is a process to obtain the sintering layer. The quality of the sintering layer directly affects the service life of the furnace. Oven drying is an important link. After the furnace cavity is built, the furnace should be dried immediately; before drying, check whether the electrical equipment and cooling water system are normal; the drying process should be strictly followed. Oven drying process is the key factor in oven drying process. The specific points are as follows: 1) the heating speed should be controlled well, especially in the early stage of oven drying. If the heating speed is too fast and the moisture in the furnace lining is discharged too fast, it is easy to form cracks and greatly shorten the service life of the furnace. ② When the furnace lining is heated to 573 ℃, the quartz in the furnace lining is rapidly transformed into quartz, and the volume expansion is 0.82%. As the temperature continues to rise, quartz transforms into lepidolite at 870 ℃, and its volume expands by 16%. In the process of phase transformation of quartz, too fast expansion will easily cause cracks or even spalling. Therefore, the heating rate should be slowed down when heating from 400 ℃ to 600 ℃, and it should be kept for 1-2 h at 870 ℃ to make the phase transformation complete and slow. ③ The final stage of furnace drying is sintering and heat preservation. The sintering temperature is determined according to the specific refractory materials. Generally, it is expected to get a sintering layer with a thickness of 30% of the furnace lining thickness. Therefore, the general sintering temperature is 50 ℃ ~ 100 ℃ higher than the tapping temperature.

5. Furnace technology

Various processes in the process of furnace operation are also very important to the service life of the furnace. Improper operation may reduce the service life of the furnace.

Improving the service life of induction furnace crucible is the goal of every foundry worker, and it will be of great significance to the enterprise.

Yiphee Electric Furnace Co.,Ltd specializes in producing induction furnace.Tel(WhatsApp):+86-13450756789, yiphee@yiphee.cn