Power Management.
In addition to energy management measures such as scrap iron, heated to burn heads 3 heads in a heated tank furnace steel annealing tray taken Tundish the head combustion type exhaust heat from the heated air (Self Recuperative Burner) which practices are still powerful. power management follows.
- Quality control of steel scrap.
Scrap iron affects the power consumption of furnace as scrap steel, if entered into non-metal furnace containing only 1% a result requires more power to fuse 15 kWh / ton steel ingots. And waste electrodes 0.2 kg / ton steel ingots. If 200,000 tons of steel ingots per year savings will be 7-8 million baht per year, so random check separation and mixed scrap metal is important. In addition, if the density of steel scrap entering uncertainties will need to enter more than 2 times per cycle, annealing, while not increasing production. Cause heat loss from the furnace wall opening to enter the scrap steel at 3 and 4 to enter the scrap steel that is 3 times more energy to enter 2 times to 17 kWh / ton if steel 200,000 tons per year to power consumption. from oven uncover 3,400,000 kWh / year, representing more than 8 million baht money per year so it should be compressed to a density appropriate (0.5-0.6 kg/m3).
- The heated scrap steel from the furnace exhaust.
Generally, the heated steel plant scrap steel before entering the hot furnace to be heated is not full. Because of poor quality control, scrap iron. Annealing time to prepare scrap steel inconsistent. Allow time to scrap metal is not warm enough. To avoid such restrictions. The steel scrap can be heated by direct heat to the scrap metal outside the furnace fuel. To heat steel scrap prior to furnace annealing reduces the time 5-10 minutes per round maximum temperature of the heated metal fragments should not be lower than 600 (C to prevent odor and gas. And reduce power by as 30 kWh / ton steel ingots. If you consider fuel required to heat steel scrap equivalent power 10 kWh / ton net result saving 20 kWh / tonne, representing more than 10 million baht income per year.
- Arc furnace using a DC power (DC EAF)
In general, steel annealing furnace will use a Power R.. Using alternating current (AC EAF) because it is easier. Do not have a direct current AC power conversion equipment. But with the advancement of technology. Convert alternating current to cause a large direct current is not a problem using DC EAF makes system stable because of the ripple voltage less. Power AC EAF 3-5% less than using bar electrodes decreased 50% to thoroughly melt steel. Not only just around the electrodes and lower risk.
Power Management. 
