When using high-frequency induction heating furnaces for melting, what aspects should be taken to save energy and reduce consumption?

① Reasonable ingredients. The scientific management of furnace materials is of great significance to improving the production efficiency of high-frequency induction heating furnaces and reducing energy consumption. Try to avoid delaying the smelting time due to adjusting the composition, and prevent the iron (steel) liquid from being scrapped due to unqualified composition and increasing material and power consumption. The charge must be properly classified according to its chemical composition, impurity content and block size. Large and long scrap steel must be cut. Light and thin materials must be packaged if possible to ensure smooth feeding and reduce melting time. The size of the charge mass should be adapted to the power frequency. The power frequency used by the high-frequency induction heating furnace decreases as the furnace capacity increases. The induction current penetration depth layer and the geometric size of the metal charge should be properly matched (when the diameter of the metal charge / induction current penetration depth > 10, the electrical efficiency of the high-frequency induction heating furnace is higher) to shorten the heating time, improve thermal efficiency, and reduce power consumption. .

② Extend the continuous smelting time. Electric energy consumption has a great relationship with the smelting method. Data show that, taking into account the energy loss required for melting and overheating of slag, the unit power consumption of an advanced high-frequency induction heating furnace is 580kW·h/t when cold starting, and when the hot furnace is operating, the unit power consumption is 505~ 545kW·h/t. If continuous feeding operation is performed, the unit power consumption is only 494kW·h/t. Therefore, if possible, centralized and continuous smelting should be arranged as much as possible, and the number of smelting heats should be increased as much as possible to extend the continuous smelting time, reduce the number of cold furnace smelting times, and reduce power consumption.

③Reasonable smelting operation

First, scientific loading.

Second, adopt a reasonable power supply system.

Third, use reasonable operating techniques in front of the furnace to control the amount of subsequent furnace materials added each time, and observe and pound materials frequently to prevent the furnace materials from "building a shed". In this smelting operation, the temperature is raised for a short time before pouring, and the molten iron is kept at a lower temperature during the rest of the time, which can reduce the erosion of the furnace lining by the high-temperature molten iron, extend the service life of the furnace lining, and reduce power consumption.

Fourth, use reliable temperature control and measurement equipment.

Fifth, promote direct reading spectroscopy and shorten casting composition inspection time.

Sixth, strictly control the temperature of steel and molten iron coming out of the furnace.

Seventh, put in insulation covering agent and slag removal agent in a timely and sufficient amount. After the molten steel is transferred to the ladle, an appropriate amount of thermal insulation covering agent and slag removal agent should be put in immediately, which can reduce the heat loss during the sedation pouring of the molten steel, and the temperature of the twisted steel can be effectively reduced to save power consumption.

④ Strengthen the management and maintenance of smelting equipment to save power and reduce consumption. Strengthen the management of smelting equipment, standardize operating process requirements for furnace construction, sintering, smelting, and intermediate frequency power supply maintenance systems, effectively increase the age of the furnace, ensure the normal operation of the intermediate frequency power supply, and thereby reduce smelting power consumption.