The smelting of ferroalloys and the manufacture of artificial graphite are both electric heating mode

Electric heating coil
The joule effect of current is used to convert electric energy into heat energy to heat objects. It is generally divided into direct resistance heating and indirect resistance heating. The power supply voltage of the former is directly applied to the heated object. When there is current flowing, the heated object itself will be heated by the electric heating ironing machine. The object that can be directly heated by the energy-saving heating coil must be a conductor, but it must have a high resistivity. Because the heat is generated from the heated object itself, it belongs to internal heating, and the thermal efficiency is very high. Indirect resistance heating requires heating elements made of special alloy materials or non-metallic materials. The heat energy generated by the heating elements is transferred to the heated object through radiation, energy saving heating coil convection and conduction. Since the heated object and heating element are divided into two parts, the type of heated object is generally unlimited and easy to operate. Calculation method of electric heating coil: diameter × high × 3.14=square centimeter
Electric heating ring is divided into round, square, rectangular, cast aluminum, cast iron, cast copper, stainless steel plate and other series.
brief introduction
Convert electric energy into heat energy to heat objects. It is a form of electricity utilization. Compared with general fuel heating, electric heating can obtain higher temperature (such as arc heating, the temperature can reach more than 3000 ℃), and it is easy to realize automatic control and remote control of temperature. The vehicle-mounted electric heating cup can maintain a certain temperature distribution of the heated object as required. Electric heating can generate heat directly inside the heated object, so it has high thermal efficiency and fast heating speed. According to the heating process requirements, it can achieve overall uniform heating or local heating (including surface heating). Energy-saving heating ring is easy to achieve vacuum heating and controlled atmosphere heating. In the process of electric heating, there is less waste gas, residue and smoke, which can keep the heated object clean and not pollute the environment. Therefore, electric heating is widely used in production, scientific research and test. Especially in the manufacturing of single crystal and transistor, mechanical parts and surface quenching, smelting of ferroalloy and manufacturing of artificial graphite, the energy-saving heating ring adopts electric heating.
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