The temperature range of electric arc furnaces is generally between 1500℃ and 3500℃.
1. The Basic Principle of Electric Arc Furnaces
The electric arc furnace is a device that uses electric current to form an arc between two electrodes and heats and melts the metal with the heat generated by the arc discharge. The electric arc furnace is mainly composed of electrodes, arcs, furnace bodies (furnaces) and cooling water systems.
2. The temperature range of electric arc furnaces
The temperature range of electric arc furnaces is relatively wide, generally between 1500℃ and 3500℃. Depending on the melting point of the metal, the temperature range of the electric arc furnace is also different. For example, the melting point of iron is 1535℃, while the melting point of copper is 1083℃, and the heating temperatures required for the two are different. At the same time, the electric arc furnace can achieve different heating temperatures by controlling parameters such as current, voltage, electrode spacing, and furnace body materials.
3. Temperature control of electric arc furnaces
The temperature control of electric arc furnaces is achieved by controlling parameters such as current, voltage, electrode spacing, and furnace body materials. During the heating process of the electric arc furnace, it is necessary to accurately control parameters such as current and voltage to achieve the ideal heating effect. At the same time, the furnace body material of the electric arc furnace will also have a certain impact on temperature control. Generally speaking, the better the thermal conductivity of the furnace body material, the higher the heating efficiency and the more accurate the temperature control.
4. Application of electric arc furnace
Arc furnaces are widely used in metallurgy, machinery manufacturing, aerospace, nuclear energy and other industries. The main characteristics of the electric arc furnace are fast heating, high efficiency, uniform heating, high melting temperature, etc. Due to these advantages of the electric arc furnace, it has been widely used in the process of metal smelting and heat treatment.
Secondary high alumina brick refers to alumina silicate refractory material with an Al₂O₃ content of 60%~75%. Its main components are alumina and silicon oxide, and it also contains a certain proportion of clay, quartz sand and other minerals. The following are the characteristics of secondary high alumina bricks:
1. High refractoriness: The refractoriness of secondary high alumina bricks is generally above 1700℃, and the load softening temperature can reach above 1400°.
2. Good wear resistance: High alumina bricks have good wear resistance and long service life.
3. Good slag resistance: High alumina bricks contain more Al2O3, which is close to neutral refractory materials and can resist the erosion of acidic slag and alkaline slag.
4. Good thermal stability: High alumina bricks have good thermal shock resistance and good thermal shock stability.
5. High temperature and strength: low high temperature creep rate and high strength.
In addition, secondary high alumina bricks also have certain compressive strength and wear resistance, which are suitable for wear parts at medium temperature. Its manufacturing process is similar to other high alumina bricks, including steps such as raw material batching, mixing, molding, drying and roasting.