Comparison of coreless gas casting furnace and cored air pressure casting furnace
The current heating and insulation pouring furnace is divided into a core casting furnace and a coreless casting furnace. The characteristics of the thermal insulation casting furnace are: stable temperature and precise control of the pouring temperature, which is very beneficial to the improvement of casting quality. Secondly, because of the pneumatic and siphon principle, most of the molten iron in the molten iron is poured on the surface of the molten iron. Therefore, the quality of molten iron is relatively pure, and the quality of molten iron is good. In addition, the capacity of the ordinary insulated casting furnace is large, which has an infinite buffer for the production process, and can often be used instead of the holding furnace. And because of the choice of nitrogen maintenance, the spheroidal time is longer.
The main advantages of the core casting furnace are: energy saving, good heat preservation effect, long life of the lining, sometimes more than two years, large capacity, strong buffering capacity, if you choose nitrogen maintenance, you can extend the spheroidal moment and so on. The defect is that it is necessary to supply power for 24 hours, and there is no power outage. Therefore, an emergency generator is usually required, and the molten iron cannot be emptied at the time of production. It is difficult to replace the trademark of molten iron.
In recent years, coreless casting furnaces have been developed for the defects of cored casting furnaces. In addition to the usual strengths of the insulated casting furnace, the coreless casting furnace can also be powered off and shut down. It can empty the molten iron and conveniently replace the hot metal trademark, completely overcoming the primary defects of the cored casting furnace. This is as ambitious. However, it brings new defects together: the demand for residual iron and steel is relatively high. When the ductile iron is produced, the demand is spheroidized, and the life of the lining is much shorter than that of the core casting furnace, and the energy consumption is also high.