Composition of medium frequency induction furnace
Medium frequency induction electric furnace is a professional heating equipment for metal induction heating, which is often used in metal heating or metal smelting furnaces. Here, as an medium frequency induction furnace for metal smelting, it is mostly used in the foundry industry or metal smelting. Commonly used scrap metal smelting in the foundry industry, the tonnage of the furnace body ranges from hundreds of kilograms to dozens of tons.
- Power supply system of medium frequency induction furnace
The power supply of medium frequency induction furnace is divided into thyristor parallel resonance and thyristor series resonance medium frequency power supply. SCR parallel resonant power supply adopts full-bridge rectification mode. The resonant capacitor bank is connected in parallel with the induction coil (load). It is a very popular form of medium frequency furnace power supply in the early years and has a good cost performance. SCR series resonant power supply adopts half-bridge rectification. Mode, the resonant capacitor bank and the induction coil (load) are connected in series, which is a popular form of medium frequency furnace power supply in recent years. The power factor is high. It can realize a series power supply with 2 sets of furnaces, equipped with a filter capacitor bank, and the current price is relatively high; The two power systems have their own merits and can be selected according to the actual situation.
- Capacitor bank of medium frequency induction furnace
The capacitor bank of the medium frequency induction furnace is a kind of electric energy compensation device. 1000KV or 2000KV electric heating capacitors are popular now. The cooling method is generally water cooling, and the frequency is 0.5Hz, 1KHz, 1.5KHz, 2KHz, 3KHz. It is functionally divided into a filter capacitor bank. Vibration capacitor bank.
3.the furnace body of the medium frequency induction furnace
The furnace body of the medium frequency induction electric furnace is a container for the molten liquid, which is divided into aluminum shell furnace body and steel shell furnace body. In the past two years, the aluminum shell furnace body is only suitable for the precision casting industry under 0.25 ton melting furnace according to environmental protection requirements. Most steel shell furnace bodies are used in the foundry industry. This steel shell furnace body consists of a fixed furnace frame, a rotating furnace body, an inductor coil, a yoke, a furnace lining, a crucible, a hydraulic tilting furnace device, a water-cooled cable, a cyclone dust removal device and a leakage Furnace alarm and other components.
- Dust removal of medium frequency induction furnace
The dust removal device of the medium frequency induction furnace is now mandatory, otherwise the environmental protection acceptance will not be passed. The dust removal system of the medium frequency induction electric furnace is generally a belt dust removal system, and the smoke and dust trapping device on the furnace body generally consists of two types, one is a type of flapping cover hanging above the furnace head of the medium frequency induction furnace, and the other is The cyclone dust hood integrated with the furnace body of the medium frequency induction electric furnace is also called the tornado dust hood. This dust hood can be turned over with the furnace body and can also be opened and closed freely.
5. the hydraulic system of the medium frequency induction furnace
In the past, the aluminum shell furnace body of the medium frequency induction electric furnace used the reducer to tilt the furnace. At present, the steel shell furnace body is popular with the hydraulic tilting furnace, which has the advantage of stable and flexible control of the tilting furnace. In addition, the opening and closing of the cyclone dust hood also uses a hydraulic system to complete the opening and action.
6, the lining of the medium frequency induction furnace
The lining of the medium frequency induction furnace is designed to protect the safety of the induction coil and the smelting furnace body. The lining materials are generally divided into three types; one is acidic lining, the other is alkaline lining, and the other is alumina lining; Knotting methods are divided into dry and wet. According to the nature and temperature of the smelted material, different lining materials and knotting methods can be selected.
7.the alarm of the medium frequency induction furnace
The alarms of the medium frequency induction electric furnace are divided into many types of alarms, such as the leakage alarm device on the furnace body; the water pressure and temperature alarm device of the cooling water circulation; the alarm of the overvoltage and overcurrent of the medium frequency power supply system.
- Cooling of medium frequency induction furnace
The cooling system of the medium frequency induction furnace mainly cools the medium frequency power supply, inductor coil, electric heating capacitor, reactor, water-cooled cable, etc. In the past, digging pools and circulating pumps were used for water cooling, but now the mainstream is to use closed cooling tower cooling, through softened water exchange cooling, non-scaling is the main feature, to ensure the normal operation of the electrical components of the medium frequency furnace.
In summary, the composition of the medium frequency induction furnace is mainly composed of the medium frequency power supply, the furnace body of the medium frequency induction furnace, the capacitor bank of the medium frequency induction furnace, the hydraulic tilting system of the medium frequency induction furnace, the dust removal device of the medium frequency induction furnace, and the cooling of the medium frequency smelting furnace. The system consists of these eight parts.
