Induction Furnaces

Operation Steps of Medium Frequency Melting Furnace before Cast Steel 1. If the melting furnace is electrified: power on for 4 ~ 8 min to supply 60% power of intermediate frequency furnace, and gradually increase the power to the maximum value after the current impact stops. 2. Ramming material for melting: as the lower part of the pot melts, pay attention to tamping at any time to prevent "bridging", and continue to add furnace charge. 3. Slagging: after most of the furnace charge is melted, slagging material (mass ratio: lime powder: fluorspar powder = 2:1) is added to cover the molten steel, and the amount of slag forming material is 1% ~ 1.5% of the weight of liquid steel. 4. Sampling and slagging: when about 95% of the charge is melted, the steel sample is taken for analysis, and the remaining 5% of the charge is added into the furnace. After all the burden is dissolved, the power is reduced to 40% ~ 60%, and the slag is removed by dumping and new slag is made.

Industrial Frequency Induction Furnace Structure An industrial frequency induction furnace is generally composed of a set of power supply and electrical control equipment and two furnaces, one for smelting and the other for standby. Each furnace is mainly composed of a furnace body, fixed frame, furnace cover mechanism, water and electricity introduction system, and hydraulic system. 1. Furnace An assembly unit is composed of frame type (below 5 tons) or simple shell type (above 10 tons) furnace shell, inductor, magnetizer, the crucible, and other main components. It is the "heart" of the furnace. It depends on how this part works. The furnace shell is welded into a whole by steel plate or section steel, which has sufficient strength and rigidity. The inductor is made of a high-quality special-shaped steel pipe, with water cooling in the middle, and a power supply connector, and a water supply connector at the end; the inductor is seated on the furnace bottom coil, centered b