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What is an electric arc furnace?
Updated: 2022-04-28 Attention:
What is electric arc furnace and what is the difference between electric arc furnace and submerged arc furnace? Today we look at the electric arc furnace manufacturer younengde electric to give you a simple analysis!
In fact, electric arc furnace is also called submerged arc furnace. It is a product, but it is called differently. Some people call it electric arc furnace and some people call it submerged arc furnace. Common electric arc furnaces in the market include DC electric arc furnace and AC electric arc furnace in terms of current form. Each electric arc furnace is divided into Minghu furnace and buried Hu furnace according to its arc length.
AC arc furnace. The structure of AC furnace is relatively simple. Three-phase AC is connected to three electrodes, and there is no complex rectifier circuit, so the cost is relatively low. Price is the advantage of AC furnace. However, due to the characteristics of AC, the arc light of AC furnace is constantly repeating the process of starting and extinguishing arc, re starting and extinguishing arc, that is to say, the arc light is unstable. Moreover, the power factor of AC furnace is low, with an average of 0.85, that is, 15% of the electric energy is wasted. Reactive power compensation device must be added to increase it to 0.9. At the same time, each AC furnace is calculated and designed in strict accordance with the conditions of materials. You can't change the properties of raw materials arbitrarily. For example, in the design, the grade of iron in your raw material is 55. Now that the furnace is produced, you get better materials. When the grade of iron rises to 80, your furnace cannot be used. You must reduce the grade to about 55. The arc length of AC furnace cannot be changed arbitrarily. For AC furnace, open arc and submerged arc cannot be changed arbitrarily, and only one can be selected.
DC electric arc furnace. The arc furnace needs to be changed into DC through the rectifier circuit. In the case of DC, the arc will not be repeated on and off, and can be maintained in a stable state. The power factor of DC furnace can generally reach more than 0.9. DC furnace is divided into single electrode furnace and double electrode furnace according to the number of electrodes. There is only one graphite electrode above the single electrode furnace, which is the negative electrode, while the positive electrode is at the bottom of the furnace, which is called the bottom electrode. The positive and negative graphite electrodes of the double electrode furnace are above the furnace. Most DC furnaces on the market are single electrode furnaces. However, a serious problem of single electrode furnace is that the bottom electrode is easy to be damaged. Because the furnace bottom electrode must contact the furnace bottom graphite brick, and the furnace bottom graphite brick must contact the raw materials in the furnace, the temperature in the furnace is very high in the smelting process. In the case of continuous production, the temperature of the graphite brick may reach more than 1000 ℃, which leads to the melting of the furnace bottom electrode at high temperature.
Well, the above is some general knowledge about electric arc furnace introduced by electric arc furnace manufacturer youngde electric. If you want to learn or learn more about electric arc furnace, please pay attention to the official website of electric arc furnace manufacturer: http://www.ttzptc.cn/
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