What are the advantages of electric arc furnace and medium frequency electric furnace?

The intermediate frequency furnace intermediate frequency furnace is a power supply device that converts the power frequency 50HZ alternating current into the intermediate frequency (300HZ to 20KHZ), converts the three-phase power frequency alternating current into a direct current, and then converts the direct current into an adjustable intermediate frequency current. The intermediate frequency alternating current flowing through the capacitor and the induction coil generates a high-density magnetic line in the induction coil, and cuts the metal material contained in the induction coil to generate a large eddy current in the metal material. This eddy current also has some properties of the intermediate frequency current, that is, the free electrons of the metal itself flow in the metal body with resistance to generate heat. For example, a metal cylinder is placed in an induction coil with alternating intermediate frequency current. The metal cylinder is not in direct contact with the induction coil. The temperature of the energized coil itself is already low, but the surface of the cylinder is heated to redness or even melt. And the speed of redness and melting can be achieved by adjusting the frequency and current intensity. If the cylinder is placed in the center of the coil, the temperature around the cylinder is the same. The cylinder is heated and melted without generating harmful gases or strong light to pollute the environment. The medium-frequency electric furnace produced by Ningbo Shenguang Electric Furnace Co., Ltd., a leading production base in China, is widely used in the smelting of non-ferrous metals [mainly used in ferrous materials such as molten steel, alloy steel, special steel, cast iron, and non-ferrous materials such as stainless steel and zinc. Smelting, can also be used for the melting and heating of non-ferrous metals such as copper and aluminum, heat preservation, and can be operated in parallel with the blast furnace. 〕

Medium frequency electric furnace is widely used for forging heating [for bar material, round steel, square steel, heat transfer of steel plate, temperature compensation, on-line heating of blue quenching, local heating, on-line forging of metal materials (such as gears, half shaft links, Precision forging such as bearings, extrusion, hot rolling, heating before shearing, spray heating, thermal assembly, and overall quenching, annealing, tempering of metal materials. 〕

Heat treatment and quenching production line [mainly for shafts (straight shaft, variable diameter shaft, camshaft, crankshaft, gear shaft, etc.); gears; sleeves, rings, discs; machine tool screws; guide rails; plane; ball head; Such as the surface heat treatment of various mechanical (automobile, motorcycle) parts and the overall conditioning, annealing, tempering of metal materials. Medium frequency furnace series melting furnace features: (1) High melting efficiency, good power saving effect, compact structure and strong overload capability (2) Low temperature around the furnace, less smoke and dust, and good working environment. (3) The operation process is simple and the smelting operation is reliable. (4) The metal composition is uniform. (5) The melting temperature is fast, the furnace temperature is easy to control, and the production efficiency is high. (6) The furnace has high utilization rate and convenient replacement. (7) Long arc yoke shields magnetic flux leakage and reduces external magnetic reluctance, magnetic leakage at both ends of the shield coil, and the yoke cross section is curved. The inner side of the arc is closely attached to the outer wall to increase the effective magnetic permeability area and make the lower ring Get better support. The unique forward and reverse coils greatly increase the efficiency of the system. Medium frequency furnace series diathermy furnace features:

Fast heating speed, high production efficiency, less oxidative decarburization, saving material and forging die cost. Because the principle of medium frequency induction heating is electromagnetic induction, its heat is generated in the workpiece itself, and ordinary workers can use the medium frequency electric furnace for forty minutes after work. The continuous work of the task does not require the professional workers to burn the furnace and seal the furnace in advance. There is no need to worry about the waste of the heated billet of the coal stove caused by power outage or equipment failure. Since the heating method has a fast heating rate, the oxidation is extremely small, and at least 20-50 kg of steel raw materials are saved per ton of forgings compared with the coal burning furnace, and the material utilization rate is up to 95%. Since the heating method is uniform in heating and the temperature difference of the core surface is extremely small, the life of the forging die is greatly increased in forging, and the surface roughness of the forging is also less than 50 um.

The working environment is superior, the worker's working environment and company image, pollution-free, low-energy induction heating furnace are compared with the coal stove. Workers will no longer be bake and smoked in the hot coal stove, but also reach the environmental protection department. The requirements of various indicators, while establishing the company's external image and the future development trend of the forging industry. Induction heating is the most energy-efficient heating method in electric heating furnaces. The power consumption per ton of forgings heated from room temperature to 1100 °C is less than 360 degrees.

Uniform heating, the core table temperature difference is very small, the temperature control precision is high, the induction heat is generated in the workpiece itself, so the heating is uniform, and the core table temperature difference is extremely small. The application of temperature control system can achieve precise temperature control to improve product quality and pass rate. The medium frequency furnace heating device has the advantages of small volume, light weight, high efficiency, excellent thermal processing quality and favorable environment. It is rapidly eliminating coal-fired furnaces, gas furnaces, oil-fired furnaces and ordinary resistance furnaces. It is a new generation of metal heating equipment. The intermediate frequency furnace is the main equipment for casting forging and heat treatment workshops. The stability, reliability and safety of the work are the guarantee for the normal and stable operation of the casting forging and heat treatment production lines of the flow operation. The medium frequency furnace has a good development prospect in the field of thermal processing. For example, Hebei Hengyuan Electric Furnace Manufacturing Co., Ltd. mainly produces forging forging furnaces, diathermic furnaces and for: diathermy, rolling, forging, bending, heat treatment (quenching) Induction heating of processes such as welding. Ningbo Shenguang Ningbo God Photoelectric Furnace Co., Ltd. It mainly produces JPS energy-saving and fast-melting medium-frequency electric furnace series. It is the first new metal melting equipment in China, which is energy-saving and environmentally friendly. Suitable for: smelting of stainless steel, alloy steel, carbon steel and various other metals.

Medium frequency furnace series quenching and tempering production line features: product use and introduction of medium frequency production line equipment mechanical transmission device adopts single station mode, medium frequency quenching and medium frequency tempering, annealing according to the process time division. The replacement of the sensor adopts integral lifting, rapid positioning, and quick connection of water and electricity (a sensor can be replaced in a short time). The position of the sensor axis can be easily adjusted to meet the requirements of various billet heating requirements. According to the needs of each product, Shandong Huaxin Intermediate Frequency Electric Furnace Co., Ltd. consists of inlet and outlet material storage brackets, feeding and discharging conveyors, workpiece spin roller conveyors, medium frequency quenching heating modules, medium frequency quenching and heat insulation modules. The intermediate frequency tempering module, the intermediate frequency annealing module, the quenching spray device, the hydraulic station, the center console and the automatic control system are composed of eleven parts. Medium frequency forging furnace medium frequency melting furnace medium frequency steel tube quenching and tempering production line electric arc furnace electric arc furnace electricalcfurnace using the electrode arc to generate high temperature smelting ore and metal electric furnace. When the gas discharge forms an arc, the energy is concentrated, and the arc temperature is above 3000 °C. For smelting metals, the electric arc furnace has greater flexibility than other steelmaking furnaces, and can effectively remove impurities such as sulfur and phosphorus. The furnace temperature is easy to control, and the equipment has a small footprint, which is suitable for the melting of high-quality alloy steel. The electric arc furnace can be divided into three-phase electric arc furnace, consumable electric arc furnace, single-phase electric arc furnace and electric resistance electric arc furnace according to the arc form. The furnace body of the electric arc steelmaking furnace is composed of a furnace cover, a furnace door, a steel discharge tank and a furnace body, and the furnace bottom and the furnace wall are made of an alkaline refractory material or an acid refractory material. The electric arc steelmaking furnace is divided into a common power electric arc furnace, a high power electric arc furnace and an ultra high power electric arc furnace according to the capacity of the transformer per ton of furnace capacity. In electric arc furnace steelmaking, electric energy is input into an electric arcmaking furnace through a graphite electrode, and electric arc is generated by using an arc generated between an electrode end and a charge as a heat source. The electric arc furnace uses electric energy as a heat source, and can adjust the atmosphere in the furnace, which is extremely advantageous for melting steel materials containing many oxidizable elements. Shortly after the invention of electric arc furnace steelmaking, it was used to smelt alloy steel and has been greatly developed. With the improvement of electric arc furnace equipment and the improvement of smelting technology, the development of electric power industry, the cost of electric arc furnace steelmaking has been declining. Now electric arc furnace steelmaking is not only used to produce alloy steel, but also used to produce ordinary carbon steel. The proportion of production in total steel production in major industrial countries is on the rise. The picture shows the electric arc furnace of the Fushun Steel Plant in Liaoning, China, which is released in the country, the “Nine High-Power Consumption Product Maximum Limits and Domestic Comparative Advanced Indicators”, the 9th electric furnace steel process unit consumption. The comparative advanced value of ordinary steel in 2005 is 500 degrees. / ton, the limit is 600 degrees / ton; the comparative advanced value of special steel in 2005 is 600 degrees / ton, the limit is 650 degrees / ton; the comparative advanced value of casting electric furnace steel is 500 degrees / ton, the limit is 700 degrees / Ton. The cost of electric arc furnace is very expensive, but the quality of the product is good. The frequency of the public frequency furnace is the most expensive. The medium frequency furnace is 800-900 degrees/ton below 2000KW, and the large furnace is 600-700 degrees/ton. These are just normal conditions, plus human factors ( Operating proficiency, equipment maintenance level, equipment aging, various compensation, harmonic control, and other factors will affect the power consumption.

The medium frequency furnace steelmaking is lower in cost than the electric arc furnace. It is suitable for small and medium-sized enterprises (small workshops), but the steel he produces is rich in impurities, and the carbon content is high. Therefore, the steel that is refined is not pure, and the requirements are not high. For medium-frequency furnace steel, the large size of the electric arc furnace is generally more than 3 tons, so only the electric arc furnace that is used by enterprises with a certain scale can produce steel which is relatively pure. The electric arc furnace uses industrial frequency electricity, while the intermediate frequency electric furnace uses medium frequency electric power. Compared with the electric arc furnace, the intermediate frequency electric furnace has high thermal efficiency, thereby achieving high production efficiency, flexible operation and low energy consumption.