PRODUCTION OF HIGH-QUALITY CAST IRON IN A GAS CUPOLA WITH THE USE OF INDUCTION CRUCIBLE FURNACE

The author has studied the process of cast iron smelting in cupola and induction furnaces and has proposed a design of gas cupola furnaces and a technology of smelting high quality cast iron. The cupola furnace properties have been studied. It has been demonstrated that the properties of cast iron made in a gas cupola furnace were better, its structure and composition were more suitable for critical casting that was achieved by the decrease in the detrimental content of sulfur and by the appropriate content of nitrogen and oxygen in the microstructure of solidified cast iron. It has been noted that a combination of gas cupolas and induction furnaces was particularly effective. The article represents the results of introduction of the both furnace types as progressive methods of cast iron smelting.