Comparison of AC and DC Arc Furnaces
Arc furnace is a kind of furnace that uses direct current or alternating current to melt metal and its alloys,it is a kind of commonly used equipment in the steelmaking industry.
The arc furnace can be divided into AC arc furnace and DC arc furnace, specifically it can be divided into small and medium power AC arc furnace, high power AC arc furnace, DC arc furnace, special DC arc furnace and ultra-high power DC arc furnace. The difference between AC and DC arc furnaces mainly lies in its power characteristics,manufacturing cost and analysis efficiency.
First of all, AC arc furnace is relatively stable in current, power and voltage, which can realize automatic control; In addition, its entrance is less, fewer parts are replaced and the cost is low. However,In terms of power characteristics, AC arc furnace is difficult to fit and withstand,The working time is longer and the efficiency is lower.
On the other hand,the operating temperature of DC arc furnace is higher than that of AC arc furnace, with higher heat conduction efficiency,which effectively reduces energy loss.And the power of DC arc furnace is easy to adjust, With rapid start-up and shut-down, it is easy to form anarc and sustain arc.Although the manufacturing cost of DC arc furnace ishigher than that of AC arc furnace, its analysis efficiencyis more accurate.
In conclusion,AC arc furnace is more suitable for small and medium power melting, while DC arc furnace is suitable for high power melting, so it is more suitable for producing special steel. At present, AC and DC arc furnace are used in combination in the steel making industry.
