Detailed explanation of the advantages and development of intermediate frequency induction furnace
At present, metal melting production equipment such as intermediate frequency power supply and intermediate frequency induction furnace, holding furnace, heat treatment furnace, etc., because of its easy to change smelting varieties, easy to control smelting quality, flexible and simple operation, high power density, fast smelting speed, high thermal efficiency, and melting Convenience and many other advantages are favored by metallurgical casting and roll manufacturers.
Many foundries and roll production plants have successively purchased and installed intermediate frequency electric furnaces to replace traditional cupolas and industrial frequency electric furnaces. In order to further promote the popularization of intermediate frequency induction furnaces, since the Swiss company BBC successfully developed the first induction melting thyristor intermediate frequency power supply device in 1966, various industrialized countries have successively launched a series of products, and soon replaced the traditional intermediate frequency Generator rotary variable frequency power supply and various outdated smelting equipment and heating equipment. Because the thyristor intermediate frequency power supply has high efficiency, short manufacturing cycle, simple installation, and easy to realize automatic control, its application range covers various industrial fields such as induction melting, heat preservation, diathermy, quenching, sintering and brazing. Recently, it has also been used in environmental protection, food storage, seed It has been applied in the fields of treatment, funeral and interment, showing strong vitality. With the rapid development of microelectronics technology, the intermediate frequency power supply has undergone great changes. The application of microelectronics technology greatly expands and enhances the control function of the intermediate frequency power supply, improves the reliability and stability, and increases the power of the power supply. The volume is getting smaller and smaller, and the cost is getting less and less. It has been unanimously recognized and welcomed by people in the industry. At present, the capacity of intermediate frequency smelting furnace in the world has exceeded 60 tons, and the capacity of holding furnace has exceeded 100 tons. Automatic heating of various metals is widely used.
Features and advantages of intermediate frequency electric furnace
Performance characteristics of intermediate frequency electric furnace:
1. The zero-voltage scan soft-start mode can be started or stopped at any time in any state without impact on the power supply;
2. Fast smelting, low production cost; low pollution, meeting environmental protection requirements;
3. It can be melted directly from the cold furnace, the solution can be completely emptied, and it is convenient to change the type of melting material;
4. The power adjustment is flexible, convenient, and can be continuously and smoothly adjusted; the temperature is uniform and easy to control, the oxidation burn is less, and the metal composition is uniform;
5. The furnace shell adopts cast aluminum alloy or steel shell structure, which has a small area; the furnace body is easy to turn and tilt, and electric, manual, hydraulic and other tilting methods can be selected according to the needs.
6. The inverter angle automatic adjustment circuit is designed, which can automatically adjust the matching of the load impedance, without adjusting the compensation capacitance, and always keep the equipment running in a good working condition;
Advantages of intermediate frequency electric furnace
Intermediate frequency electric furnace is a power supply device that converts 50HZ power frequency alternating current into intermediate frequency (300HZ above to 1000HZ). It converts three-phase power frequency alternating current into direct current after rectification, and then converts the direct current into an adjustable intermediate frequency current, which is supplied by a capacitor With the intermediate frequency alternating current flowing in the induction coil, high-density magnetic lines of force are generated in the induction coil, and the metal material contained in the induction coil is cut, and a large eddy current is generated in the metal material. Since the principle of intermediate frequency induction heating is electromagnetic induction, the heat is generated in the workpiece itself. Ordinary workers can perform continuous forging tasks ten minutes after going to work with the intermediate frequency electric furnace, without the need for professional furnace firing workers to perform furnace firing and sealing work in advance . Due to the fast heating speed of this heating method, there is very little oxidation. The oxidation burning loss of the intermediate frequency heating forging is only 0.5%, the oxidation burning loss of the gas furnace heating is 2%, and the coal burning furnace reaches 3%. The intermediate frequency heating process saves materials. Compared with coal-fired furnaces, a ton of forgings can save at least 20-50 kilograms of steel raw materials. The heating speed of the intermediate frequency electric furnace is fast, the production efficiency of the intermediate frequency electric furnace is high, the intermediate frequency electric furnace is less oxidized and decarbonized, the intermediate frequency electric furnace extends the life of the mold, the intermediate frequency electric furnace has a superior working environment, the intermediate frequency electric furnace improves the labor environment of the workers and the company image, the intermediate frequency electric furnace is pollution-free, and the intermediate frequency electric furnace has low consumption Energy, medium frequency electric furnace has fast melting speed, medium frequency electric furnace has good power saving effect, less burning loss, low energy consumption, medium frequency electric furnace self-stirring function, uniform melting temperature and metal composition, medium frequency electric furnace electric heating operation environment, and medium frequency electric furnace start performance. Both empty furnace and full furnace can reach 100% start-up.