Luoyang HongtengIntermediate frequency induction furnace
Induction furnaces are widely used, and the design of large-scale industrial-frequency crucible induction furnaces often needs to take into account the refractory materials for the furnace lining. In general, the lining materials of induction furnaces are mainly based on the utilization rate and economy of the furnace. In order to ensure the normal operation of the induction furnace, the refractory materials of the furnace lining generally have the following requirements: 1. Sufficient refractoriness Materials with a refractoriness higher than 1580°C are called refractories. The operating temperature of the furnace lining is generally lower than the temperature of the molten metal. However, based on the requirements for the life of the furnace lining, some areas of the furnace body have to be considered, and the temperature is too high. In cast iron induction furnaces, it is often unsafe to use materials with low refractoriness. As the lining material of cast iron induction furnace, its refractoriness should be greater than 1650-1700℃. 2. Good thermal stability Induction furnaces rely on electromagnetic induction to exchange energy. In order to ensure high electrical efficiency of the furnace, the thickness of the furnace lining of the induction coil is limited. In addition, the temperature of the...
In the metal smelting industry, induction furnaces are widely used. In actual production, the rational use of electric furnaces is of great significance to the entire production line, especially in improving the production efficiency of the production line and reducing energy consumption. Today, the editor of Hongteng will summarize with you how to use the smelting process of electric furnace to save energy. The first is the need to properly handle the charge in the furnace. The charged charge must be properly classified according to chemical composition, impurity content, block size, etc., cutting large and long scrap, and conditionally handling light and thin materials to ensure smooth charging. The size of the filler block should be adapted to the frequency of the power supply. The power frequency used by an induction furnace decreases as the furnace capacity increases. The penetration depth of the induced current matches the geometry of the metal charge. This work can shorten heating time, improve thermal efficiency, and reduce power consumption. Avoid delaying the smelting time of the whole process due to unqualified filling material components, increasing material consumption, power consumption, and even scrapping molten steel. At the same time, we should try to extend the...
The melting furnace body of the circuit is mainly composed of induction coil, refractory material and magnetic yoke. The induction coil is wound from a hollow copper tube, and then the tube is cooled by water. The section of the copper pipe can be round or square, and the square is more efficient. Inside the induction coil, a crucible made of refractory material is knotted. The metals to be smelted, such as various steels, are placed in the crucible, and then the electromagnetic induction heating principle is used. When the induction coil passes an intermediate frequency current, an intermediate frequency magnetic field is generated , in which most of the magnetic field passes through the steel and is called the main flux. However, there is still a part of the magnetic field that does not pass through the steel, which is called leakage flux. Only the main magnetic flux can generate an induced potential in the steel, form an eddy current, and make the steel in the furnace heat up. The leakage magnetic flux forms a leakage current, which only reduces the voltage on the circuit, but cannot complete the heating. The relative magnitude of the main flux and leakage...
Every user hopes that their electric furnace can work for more time, so that the production line can produce more products and bring considerable benefits to themselves. However, when the smelting furnace is working, many factors will affect the service life of the furnace, such as the structure of the furnace body, the material of the furnace lining, the operation method in the production process and so on. Of course, the smelted metal material will also have an impact on the furnace age. Today we will share this knowledge with you. The first is some rust dirt in the charge, as well as a lot of sand adhering to the return charge, these substances will aggravate the erosion effect on the furnace lining, so we should clean the dirt on the charge as much as possible before using it. Among the materials that need to be smelted, high-chromium cast iron has the least erosive effect on the furnace body and lining due to the low smelting temperature, but special attention should be paid to the feeding method of the return material. High-chromium cast iron has poor thermal conductivity and high brittleness. When the cold material is suddenly added to the...
Since the establishment of the company, Hongteng has been committed to serving users around the world, so we have many production lines under construction and put into production all over the world. Today, the editor of Hongteng summarized some quality control problems in the smelting process when the electric furnace is at work, and would like to share it with you. Heat preservation of molten iron: The heat preservation of molten iron at high temperature will cause temperature changes, element burning loss, dissolved gas and changes in the state of the molten iron itself. Therefore, if long-term heat preservation is required, the temperature of heat preservation should be reduced as much as possible. For example, a small amount of clean and dry return material can be added to cool down, and the surface of molten iron can be covered with slag made of glass and other materials. Selection of molten iron composition: When several castings are to be cast in the same molten iron, the largest batch of castings or the most important castings should be batched as much as possible. During the process of pouring molten steel, the carbon content in the furnace will continue to decrease. , you...
The biggest feature of induction furnace heating is that the workpiece can be directly heated, the workpiece heating speed is fast, the temperature is easy to control, and no metal impurities are mixed in the heating process, so it has a wide range of applications. The most common applications of induction furnaces are in the machinery manufacturing industry and metallurgical industry, so what are the specific uses of induction furnaces? Red Teng editor to introduce to you. Quenching: heating the workpiece to a certain temperature and then cooling it down quickly, so that the metallographic structure of the workpiece is changed to a certain extent, thereby increasing the hardness and wear resistance of the workpiece, which is called quenching. However, after the workpiece is quenched, it will become very brittle and the fatigue resistance will deteriorate. In order to solve this contradiction, there is a surface quenching process. Induction heating is the most ideal heating method for surface hardening, which can meet the surface hardening requirements of the workpiece by controlling the heating depth and heating time. Diathermy: During the heating process, the internal and surface temperatures of the entire workpiece are approximately equal, which is called diathermy. The advantages...
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