The medium-frequency melting furnace features a radiator structure with a silicon-controlled rectifier: the main principle involves water-cooled cavities and support from multiple copper columns. If the circulating water is too hard, scaling may occur inside the water cavity of the medium-frequency melting furnace, leading to poor heat dissipation. Similarly, if leaves or other debris enter the water cavity, it can also cause a blockage in the water flow.

The factory inspection temperature for silicon controlled rectifiers is 100°C. Generally, to ensure the normal operation of a medium-frequency melting furnace, the temperature of the electrical cabinet circulating water should be maintained below 40°C. A handheld infrared thermometer is very useful; a thermometer capable of measuring up to 350°C can be purchased for just a few hundred yuan, which is not expensive. Using it to measure the temperature of the silicon controlled rectifiers and heat sinks in operation can help identify anomalies and address defects in a timely manner.

The top surface of the medium-frequency melting furnace's radiator must match the standard of the component platform to prevent deformation and damage to the components. The top surface of the medium-frequency furnace radiator should have high flatness and brightness. During installation, the component platform and the radiator top surface should be kept clean, free from oil stains and other dirt.

During equipment assembly, it is crucial to ensure that the silicon component surface is perfectly parallel and concentric with the radiator surface. Throughout the assembly process, pressure should be applied through the center line of the component to ensure even distribution across the entire contact area. When manually assembling, it is recommended to use a torque wrench to uniformly apply force to all fastening nuts, with the pressure size meeting the specified requirements. When repeatedly using the water-cooled radiator of a medium-frequency melting furnace, special attention should be paid to inspecting whether the equipment surface is smooth and flat, and whether there is scale or blockage inside the water cavity. Pay particular attention to any indentation on the surface; if any of the above conditions are present, replacement is necessary. In summary, the correct use of silicon-controlled rectifiers is essential for the normal operation of medium-frequency furnaces.