Analysis of Fire Sintering Process of Core Furnace

The treatment of molten iron in industrial furnaces, the removal of sensors, and the docking of this work are the core parts of sensor replacement. The quality and progress of the work involves the success of the entire construction. The temperature of the refractory lining of the furnace cannot be lowered below 80°C during the quick change, otherwise the lining will be cracked and the life of the entire lining will be affected. Therefore, under the premise of guaranteeing construction quality, we must rush to schedule. In addition, the cleaning of the throat is particularly important. The throat of the electric furnace should be as sparingly as possible to the original size; the slag on the butt joint surface must be cleaned to ensure that the opposite is strictly adhered to, otherwise the iron leakage from the butt joint surface is easily caused. To empty all the molten iron from the throat, all hoses in the pit should be protected to prevent burns.

When the power transmission of the sensor is resumed and the refractory sinter is fired, and the temperature of the molten slag solid iron mold reaches the left or right, ie, the iron mold begins to melt, the iron should be injected into the furnace, otherwise there is a possibility that the groove may be broken. Therefore, the 5 to 8t molten iron used for melting should be provided with emergency preparations in addition to the normal process flow cupola. If the thermocouple in the furnace for measuring the die temperature of the trench is accidentally damaged, it should be judged when the iron is fed into the bath according to the change of the coil current, because the temperature of the die at the die exceeds the magnetic transition point of 70°C (Curie point) in the cast iron structure. The ferrite becomes non-magnetic, and its magnetic resistance increases. According to the principle of the transformer, the current of the coil will suddenly rise. At this time, the ferrofluid can be injected. The site should be provided with enough iron troughs to contain the molten iron in the electric furnace when there is an accident of leakage of iron or broken water in the newly replaced sensor (for a 30t cored furnace, the molten iron in the furnace will have 45t at most), To save the furnace refractory lining and equipment to prevent accidents from expanding and reduce losses.