Feeder device utilized in electric arc furnace, and flue gas and temperature control method

A sealed feeder device utilized in an electric arc furnace, comprising a sealed feeding chute having an outlet sealedly communicating with a side wall of the electric arc furnace and a material blocking sealed door disposed in the sealed feeding chute;

• the material blocking sealed door separates the sealed feeding chute into a cold steel scrap storage chamber and a material feeding and dedusting chamber, and is operated by a driving mechanism to separate or connect the cold steel scrap storage chamber and the material feeding and dedusting chamber;
• a strip replaceable liner plate is disposed in blanking point area of the sealed feeding chute;
• the material blocking sealed door is a planar straight panel or an arc-shaped panel, wherein the panel has a flue gas sealing edge on a periphery of the panel;
• the material blocking sealed door is an arc-swing material blocking sealed door constrained by swing arms which form a portal frame structure;
• one end of each swing arm is fixed together with the panel, and the other end is rotatably fixed together with the sealed feeding chute through a rotating shaft;
• a vibration exciter for forced vibration feeding is disposed in the cold steel scrap storage chamber;
• connection between the material feeding and dedusting chamber and the side wall of the electric arc furnace is provided with a telescopic chute and a telescopic chute driving device;
• an inclination angle of the sealed feeding chute relative to the horizontal plane is 30-60°.