In EBT electric arc furnaces for steel production, the taphole discharge chamber is placed vertically on the furnace floor. When the discharge valve is closed, this chamber is filled with special refractory sand, which prevents the penetration of melt into the chamber. After finishing loading the furnace, an electric arc is created and the melting process begins.
The olivine sand of the molten outlet duct of the electric arc furnace is formed as a result of the rotation of the slag furnace by 10-12 degrees, and at the final stage, the taphole valve returns, and when the filling sand is discharged, the molten discharge is carried out. If the filling sand does not come out, the oxygen blow is used to open the filling sand, which greatly affects the life of the taphole refractories and poses life risks for the operator, and the use of the oxygen lance is tried to be minimized. To measure the level of satisfaction with EBT sand, the opening percentage is defined. Considering that EBT sand is one-time use and is thrown away after each use, so about 2 tons of EBT sand sample is checked to check the level of satisfaction. In each use, depending on the size of the furnace, the volume of the tap hole chamber will be different, and usually between 15 and 25 kg of EBT sand are used in each step of filling the tap hole. Self-opening happens when the melt starts to drain from the furnace into the crucible as soon as the valves are opened. Depending on how many times the sand does not come out by itself after 100 melt discharges from the furnace and requires an oxygen lance, the opening percentage is determined.
after 100 melt discharges from the furnace and requires an oxygen lance, the opening percentage is determined.The self-opening of the electric arc furnace duct is determined by the correct efficiency of the filling sand of the discharge duct. One of the most important parameters affecting self-opening is surface sinterability of sand and reduction of wettability of sand by molten steel, and in case of no self-opening, oxygen blowing is used, which on the one hand reduces the life of refractories in the chamber and reduces the quality of the steel product, and on the other hand, it causes life and injury risks. It may enter to the operator. Alvin sand produced by Atlas Ceram company, this defect has been minimized.
The set well block and split ring are installed under the tandish container of Saba Steel Complex, cow head nozzles, the melt comes out from the two holes at the bottom of these nozzles and slabs are produced in the casting line. Well block and split ring are used for precise placement and installation of these cow head nozzles under the tandish container.
In EBT electric arc furnaces for steel production, the taphole discharge chamber is placed vertically on the furnace floor. When the discharge valve is closed, this chamber is filled with special refractory sand, which prevents the penetration of melt into the chamber. After finishing loading the furnace, an electric arc is created and the melting process begins.
Atlassram Kavir company succeeded in producing power plant bricks and after receiving approval from international laboratories and with the help of Tavanir company and Niro Research Institute, and after installing in several power plants and receiving letters of satisfaction, it was placed in Tavanir’s vendor list and is currently supplying these bricks to the entire country. to do
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