Steel Making Plant.
The steel making plant has an electric arc furnace (EAF) with a nominal capacity of 220 tons of molten steel with the ability to charge scrap and continuously charge Dri. The produced sponge iron in DRP (Hot DRI & Cold DRI) is charged to Electric Arc Furnace by using AUMUND specialized conveyor (hot charging) and belt conveyor (cold charging).
In order to maintain the refractory and water-cooling panels of the furnace, slag making is needed, so the produced lime from Lime Plant and dolomitic are used Also, carbon and oxygen are used to achieve foamy slag and melt refining. This method has many advantages, which can be mentioned as follows:
• Cover the arcs and protect the refractories from arc
• Improve the quality of the steel by absorbing oxidation products (Al2O3, SiO2, …) and inclusion
• Dephosphorize in the furnace and desulfurize in the ladle
• Insulate the Steel to minimize heat loss, …
Ladle Furnace
The molten steel is tapped to ladle and transferred to Ladle Furnace (LF) by ladle car. After performing secondary metallurgical treatment and preparing the molten steel chemical analysis and temperature according to the customer's desired grade, the ladle is sent to Continuous Casting Machine.
vacuum Degassing (VD)
This plant is used to produce clean steels and steels that should have a low percentage of dissolved gases (H, N, O, …).
Continuous casting machine (CCM)
This plant has 2 continuous casting machines with open and closed casting capabilities. Usually, construction heats are casted in open casting (CCM1), and quality heats are casted in close casting (CCM2). In CCM2, in order to increase the quality of the produced billets or blooms, it is possible to use an electromagnetic stirrer in the mold and in the final stages of solidification, and it is also possible to use soft reduction to improve the quality of the center of the billets. In grades that are prone to cracking, slow cooling can be used under the desired conditions.
The product produced by continuous casting is as follows:
The cross section of the billet produced in CCM1: 130x130, 150x150, 160x160, 180x180 and 220x220 mm
The cross section of the billet produced in CCM2: from RD250 to RD520 mm in diameter and 200x200, 270x330 and 280x380 mm