. To ensure uniform preheating of scrap steel entering the feed hopper, the conveyor continuously performs horizontal reciprocating vibrations, causing the scrap steel within the hopper to move forward continuously until it is fed into the furnace..
The high-temperature flue gas emitted by the electric furnace flows through the preheating hopper in the opposite direction of scrap steel input..
During continuous scrap steel loading into the electric furnace, the molten steel pool within the furnace remains in a liquid state, with incoming scrap steel directly falling into the molten pool. The arc is heated on the flat molten pool covered with foam slag. The entire process of molten pool oxidation smelting and foam slag operation has changed the traditional electric arc furnace scrap steel smelting process. Under these conditions, the arc remains stable, significantly reducing the reactive power impact on the power grid caused by the three-phase current during the scrap steel melting period.
This effectively avoids the impact of the arc’s constant changes on the average input power during traditional electric furnace scrap steel melting, thereby improving the power grid’s safe operation index.
Continuous charging ensures that scrap steel can be fed into the furnace throughout the entire power-on phase. Therefore, there is no need to open the furnace lid, avoiding heat loss caused by opening the lid. Since the furnace lid remains closed, a continuous preheating charging system channel is used to exhaust fumes while simultaneously heating the scrap steel within the channel.