偏心底出钢(ebt)电弧炉冶炼工艺（Smelting technology of eccentric bottom tapping (EBT) arc furnace）.doc

偏心底出钢(ebt)电弧炉冶炼工艺（Smelting technology of eccentric bottom tapping (EBT) arc furnace）Off bottom tapping (EBT) arc furnace smelting process date: 2006-11-15 reading times: 6521 the traditional "three phase electric furnace steelmaking process: charging melting, slag, slag oxidation reduction, slag tapping into the ladle is reducing slag, slag tapping on further desulfurization and deoxidation and inclusion adsorption is beneficial and harmless. When the electric furnace is divided into functions, the ultra high power electric furnace matches with the outside refining. The slag in the electric furnace tapping is the oxidizing slag. Theory and practice have proved that the smelting of the slag into the ladle refining process will have a very adverse impact on refining. Thus, a series of slag steel separation methods have been developed to prevent oxidation slag from entering the ladle refining process. Among them, the most effective, and the most widely used is EBT (EccentricBottomTapping), that is, eccentric bottom tapping method, referred to as "EBT"". In this paper, the structural features and advantages of eccentric bottom tapping furnace are summarized. The smelting process of eccentric bottom tapping electric furnace and the tapping hole, filling and operation of eccentric bottom tapping furnace are emphatically introduced. The characteristics of 2EBT arc furnace EBT electric furnace structure is to change the traditional electric furnace's tapping tank into the tapping box, and the tap hole is vertical downward at the bottom of the steel box. The lower part of the steel tapping opening is provided with an opening and closing mechanism for opening and closing the tap hole, and the middle of the top of the steel box is provided with an operating opening so that the filling operation and maintenance of the tap hole can be made. The main advantage of EBT electric furnace is that it realizes slag free tapping and increases the use area of water-cooled furnace wall. The advantages are as follows: (1) reduce the tapping of the tilt angle. Simplified structure: reduce furnace tilting short net impedance: increase the furnace wall area, improve furnace life. (2) remaining slag operation in steel production. Slag free tapping can improve the quality of steel, which is beneficial to refining operation: remaining steel and remaining slag, which is beneficial to smelting electric furnace and saving energy. (3) bottom tapping. Reduce tapping temperature, save power consumption: reduce two times oxidation, improve the quality of steel: improve ladle life. Because of many advantages of EBT electric stove, it has been rapidly popularized all over the world. Now the construction of electric furnace, especially with the furnace refining with the furnace, must require slag tapping, and EBT is the first choice. Tapping operation of EBT electric furnace. When tapping, tapping to the lateral tilting about 5 degrees after the opening tapping mechanism of tapping hole filler under the action of static pressure automatic drop in molten steel, molten steel into the ladle, realize the automatic casting. When molten steel to about 95% of the requirements quickly returning to prevent slag, tilt and inflow of about 5% bits of molten steel and slag in ladle furnace, after shaking (left in 10% ~ 15% steel furnace slag, aged 95%) inspection maintenance tapping, tapping hole closed, filler,. Scrap, re arc melting. EBT electric furnace smelting smelting process of 3.1 smelting process of 3EBT electric furnace steelmaking equipment has changed from the past including melting, refining, oxidation, reduction temperature, composition control and quality control, to retain only necessary heating and melting, refining function (dephosphorization and decarburization) of steel equipment. Transfer process operations that require only lower power to the ladle furnace. Can be the beginning of steelmaking furnace to provide optimum refining conditions of various liquid refining process, strict control of composition, the temperature of liquid steel, inclusions, gas content, in order to meet the users on the quality of steel is more and more strict requirements. The dephosphorization as much as possible, even partial decarburization in advance to the melting stage, and oxidation after melting refining and heating period only carbon control and not suitable for melting iron alloy in the feeding period is easily oxidized and adding amount of the larger, to shorten the smelting cycle, reduce consumption and increase productivity is particularly advantageous. Leave the remaining slag operation using EBT steel melting furnace, the beginning of molten pool readily available, complemented by enhanced oxygen blowing and bottom stirring, provide good conditions for the advance of metallurgical reaction. From increasing productivity and reducing consumption, with the shortest time requirements for electric melting and fast heating rate and assisted the lea。