Luoyang HongtengIntermediate frequency induction furnace
In an intermediate frequency furnace, components that carry large currents, such as electric furnace coils, yokes, water-cooled cables, and power cabinets, all need water cooling. The cooling water system is a key system in the intermediate frequency furnace installation and an important part of ensuring the normal operation and safe operation of the equipment. 1. Equipment cooling requires water supply by water supply pressure and flow rate specified in the “Instructions for Use” of the equipment. 2. Use industrial softened water as much as possible-PH value: 7.2～8.03. It is best to supply water from a dedicated cooling tower for power supply cooling and furnace cooling. In particular, the power supply should be cooled by a water-water exchanger or a closed cooling tower. 3. As the acidity of the water and the content of calcium and magnesium impurities gradually increase, corrosion or scale will occur, which will affect the heat dissipation effect and service life of the heat exchanger. The cooling equipment should be cleaned in time to ensure that the induction furnace body is not damaged. 4. The inlet and outlet of the sensor and water-cooled cable should be equipped with pressure gauges, temperature gauges, and water pressure adjustment switches...
An electric induction furnace is a heating furnace that converts the electric energy in the furnace into heat to heat workpieces. Compared with fuel furnaces, the electric furnace has the following advantages: the atmosphere in the industrial furnace is easy to control and even can be vacuumed; The material is heated quickly, the heating temperature is high, and the temperature is easy to control. The production process is easier to realize mechanization and automation. Good working hygiene conditions; High thermal efficiency; Good product quality; And being more environmentally friendly is good product for increasingly serious environmental problems. Electric furnaces in the metallurgical industry are mainly used for iron smelting, steel melting, metal heating, and heat treatment of metal, ferroalloy, non-ferrous metals, etc. Industrial-scale electric furnaces appeared at the end of the 19th century. Since the 1950s, due to the increase in demand for advanced metallurgical products and the decrease in electricity charges with the development of the electric power industry, the proportion of electric furnaces in metallurgical furnace equipment has increased year by year. Electric furnaces can be divided into resistance furnaces, induction furnaces, electric arc furnaces, etc. Common induction furnaces are further divided into steel furnaces, aluminum furnaces, copper...
Induction industrial furnaces can be divided into two types: core and coreless. Cored induction furnaces are rarely used in steelmaking and will not be introduced here. For coreless induction furnaces, induction furnaces can usually be divided into three types according to the frequency of power supply: power frequency furnaces (frequency 50 or 60Hz), which are directly connected to the power grid through transformers and are mainly used for smelting cast iron; High-frequency furnace (frequency 10KHz ~ 300KHz), using high-frequency tube oscillator as power supply, is mainly used for small laboratory research; Medium frequency furnace (frequency 150Hz ~ 10000Hz), the power supply used is medium frequency generator set, triple frequency converter or thyristor static frequency converter. The medium frequency induction furnace of our company can be divided into induction melting furnace and induction heating furnace, The complete equipment includes: power supply and electrical control part, furnace body part, transmission device, and water cooling system. Here are some videos for your reference. https://www.youtube.com/watch?v=fWatR4Dmdy0
1, Induction furnace coil insulation treatment process is commonly used for four insulation treatment methods. First, the surface of the coil is sprayed with insulating paint; Secondly, a layer of mica tape is wound on the coil sprayed with insulating paint. Thirdly, wrap a layer of glass ribbon around the mica ribbon; Finally, a layer of insulating paint is applied. This insulation treatment process can ensure the insulation voltage resistance of the industrial induction furnace coil up to 5000V. 2, Induction furnace coil insulation treatment is another way to directly spray high-temperature insulation paint, some commonly claimed that the insulation paint can withstand a temperature of 1800℃, we think that this temperature value is still to be discussed, but spraying high-temperature insulation paint is also a simple method. Theoretically speaking, high-temperature insulation paint insulation grade is high, the insulation coating temperature resistance is higher, high-temperature insulation coating volume resistivity, more than 1016Ωm at room temperature. High dielectric strength (breakdown strength), greater than 30kV /m. It has good chemical stability, aging resistance, corrosion resistance, and good soothing reactivity. No flash point, ignition point, high hardness, hardness is greater than 7H. Heat resistant to 1800℃ can work under open fire for a...
1. When longitudinal cracks appear on the induction furnace wall, a slow heating method should be adopted to heal the cracks before smelting metal. 2. When transverse cracks appear on the furnace wall, according to the actual situation, the transverse crack can be filled with a fine powder of refractory material, and then the material is added and melted. 3. When the melting furnace bottom is corroded, it can be repaired with furnace lining material, and covered with iron plate after repairing, and the metal furnace material is added for low power melting for a period of time and then full power melting. 4. The maintenance and maintenance of the smelting furnace lining are generally carried out in the case of a cold furnace. The furnace should be cooled by natural cooling or water cooling system, and water spray cooling is not allowed. 5. After smelting steel, the molten iron is produced. In order to prevent cracks on the furnace wall, an asbestos board should be added to the furnace mouth for heat preservation. 6. If the industrial furnace is shut down for a long time, the electric furnace should be slowly heated and melted when the furnace is turned...
Normally from the maintenance habit, MF furnace is composed of Loading part(include: Furnace change over switch, Water cooling cable, Busbar, Furnace induction coil, etc.) Compensating capacitor, Smoothing reactor, and Control cabinet 4 parts. When there is an error on the device, we normally consider simple errors, to prevent simple failures from being complicated. Secondly, before arriving at the site for inspection, the operator should be inquired in detail about the phenomenon and the relevant situation when the fault occurs analysis of the information, sometimes can be very helpful. If the condition is allowed and indeed needs to Implement fault recurrence, we need to operate the machine and observe the malfunction at no damage on components. All these are helpful to judge the fault range in time, thus saving many unnecessary tedious inspections. If the fault scope cannot be determined according to the fault phenomenon and related conditions, the inspection must be carried out according to the complex fault inspection procedure. The practice shows that the application of the elimination method in logic can greatly accelerate the process of fault checking. Selecting proper inspection methods on specific faults can simplify complex faults and complete maintenance tasks in time. The common fault...
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