An electric arc furnace is in teapot shape and is a steel-reactive container. The furnace body consists of the body of the furnace and its cover (top). The shell of the furnace is made of steel plates, which contain a liner. The furnace walls are made of magnesium bricks (mgo) or chrome bricks (cr2o3, mgo). The base of the furnace is in a pelvis and the clay and magnesium bricks are covered with magnesium-burning (battered) contusions. The acid furnace is lined with stone bricks (sio2) and stone sand. In addition to the basic requirements of fire-resistant materials for furnaces, heat resistance and insulation, they require the ability to withstand the chemical erosion of slags, thermal shocks of the furnace's temperatures and the collision of the furnace blocks and operating machinery. The furnace door and the steel tank are located at both ends of the furnace diameter, respectively. The doors and the covers of the doors are cooled with water, and the contact between the two is tight in order to maintain the atmosphere in the furnace. The exit is blocked with a plume of plume, and the steel is cut open with steel. For operational convenience, large-capacity arc furnaces open the second door to 90 with the first door. Settings. The furnace covers are capped with high aluminium or chromium bricks embedded in a steel furnace covers, and are arched. It is also designed to maintain the seal of the furnace and to facilitate the pairing of the stove cover. Three electrodes reach into the furnace through three water-cooled seals (electro-photo hole) at an equal distance in the centre of the furnace cover. The electrodes should have good conductivity, sufficient mechanical strength and a stable structure resistant to heat shocks, with low impurities and high-quality graphite electrodes in actual production. Both ends of each electrode are made of chasms and snails to facilitate their continuation. An average of 3-7kg electrodes per ton of steel are consumed due to unavoidable high temperature oxidation, heat collapse and mechanical damage。
