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3.2 Control of S and N3.2.1 Control of w(S)There is no S source for smelting cast iron in medium frequency furnace, and the w(S) content of molten iron is low. Therefore, it has great advantages for producing ductile iron, but for gray cast iron, low S and high Mn will increase casting stress, greatly increase excerpt …

Overview:SCR intermediate frequency power supply device, referred to as SCR intermediate frequency device, is a power supply device that uses the switching characteristics of SCR to convert 50Hz power frequency current into intermediate frequency current. It is mainly used in induction melting, induction heating, induction quenching and other fields. widely used in.Its advantages are:

1) Fault phenomenon: Frequent burnout of the thyristor original, after replacement, burned out Analysis: Refer to fault E) for additional introductions as follows: a. When the thyristor is turned off in reverse, the instantaneous glitch voltage subjected to the reverse voltage is too high, and the RC absorption is checked. b. The load is reduced excerpt …

The basic working principle of the thyristor intermediate frequency power supply is to rectify the 50 Hz industrial frequency AC current into DC through a three-phase bridge rectifier circuit. Circuit diagra:

The structure of the medium frequency iron coreless induction furnace (see Figure 1) mainly consists of three parts: 1. Induction coil (wound by water-cooled copper tube) 2. Crucible (usually made of refractory materials) 3. Furnace charge (can (for fragments of various metal materials) The basic principle of the medium frequency ironless induction furnace is a excerpt …