1 reasonable ingredients

The scientific management of the charge is of great significance for improving the production efficiency of the intermediate frequency furnace and reducing the energy consumption.

Try to avoid delaying the smelting time by adjusting the composition , and prevent iron ( steel ) from being scrapped due to unqualified components , increasing material consumption and power consumption.

The chemical composition must charge, the case containing impurities and proper classification size blocks , cut large, long scrap , conditionally respond light, thin material packing process , to ensure smooth feeding , to reduce the melting time. The size of the charge block should be compatible with the power supply frequency , and the power frequency used by the intermediate frequency furnace decreases as the furnace capacity increases. The induced current penetration depth of the layer and the metal charge geometry fit properly ( when the diameter of the metal charge / induced current penetration depth of> 10 when , the highest electrical efficiency of the furnace ), to reduce the heating time , increase the number of heat , and reduce power consumption . For example, a 500 Hz intermediate frequency power supply has a suitable mass of 8 cm , and a 1000 Hz intermediate frequency power supply has a suitable mass of 5.7 cm . 

2 extend the continuous smelting time

The unit consumption of electricity has a lot to do with the way of smelting. Data show that, in the case of considering the required energy loss and overheating the molten slag , when advanced intermediate frequency furnace cold start , unit power consumption is 580KW · H / T, when the furnace operation , the unit power consumption is 505 ~ 545KW · H /t . If the feeding operation is continuous , the unit power consumption is only 494 KW · h / t .

Thus , a case where conditions should be arranged as a continuous smelting concentrated , to maximize the primary smelting furnace times , increase the duration of the refining time , reduce the number of cold-melting furnace, to reduce power consumption . 

3 reasonable smelting operations 

(1) Scientific loading;

(2) Adopt a reasonable power supply system;

(3) Use reasonable pre-furnace operation technology to control the amount of subsequent charge per load. Diligent observation, diligent and diligent materials , to prevent the charge of the stove. In this smelting operation, the temperature is raised for a short time before pouring , and the molten iron is kept at a lower temperature for the rest of the time , which can reduce the erosion of the high temperature molten iron on the furnace village , prolong the service life of the furnace village, and reduce the power consumption.

(4) Using reliable temperature control and measuring equipment;

(5) Promote direct reading and shorten the inspection time of casting components.

(6) Strictly control the temperature at which the steel and molten iron are discharged; 

(7) Timely and sufficient amount of insulation and covering agent to remove slag. After the steel was transferred to a ladle filled amount should immediately serve insulation covering agent, slag agent , can reduce the heat loss of the casting process of molten steel sedation , tapping temperature can be appropriately reduced , in order to save power consumption.

4 Strengthen the management and maintenance of smelting equipment to save electricity and reduce consumption

Strengthen the management of the intermediate frequency furnace , standardize the operating process requirements such as furnace oven, sintering, smelting and the maintenance system of the intermediate frequency power supply , effectively improve the furnace age , ensure the normal operation of the intermediate frequency power supply, and thus reduce the smelting power consumption.