Tosyali Orders EAF Meltshop & Slab Caster from Primetals
Turkish steel producer Tosyali Demir Celik Sanayi AS has placed an order with Primetals Technologies to supply an EAF Quantum electric arc furnace, a twin vacuum degassing plant with oxygen blowing and a two-strand slab caster for a flat steel greenfield project in Iskenderun in Turkey. The EAF Quantum is designed to handle metallic scrap and virgin materials such as HBI, pig iron in different composition and quality. The electrical energy requirement of the electric arc furnace is extremely low, mainly thanks to the scrap preheating system, but also due to many other features of EAF Quantum technology, such as FAST Tapping system, continuous foaming slag and continuous submerged electric arc, flat bath operation. This reduces both the operating costs and the CO2 emissions. The EAF Quantum is highly productive furnace that will reach lowest of possible power off times. The twin vacuum degassing plant provides further treatment and steel quality to the production portfolio of Tosyali Demir Celik. With oxygen blowing possibility Tosyali Demir Celik steel plant will be ready to produce steel grades starting from ULC grades up to high carbon grades, peritectic grades, API grades, dual phase grades and also high strength low alloyed steel grades. Two-strand continuous slab caster provides a capacity of 2 million tonnes of slabs per year, to be increased to 3.4 million tonnes and is able to process a wide range of steel grades. The new meltshop is scheduled to be commissioned in by the end of 2022.
For the first phase of this new meltshop project, Primetals Technologies will supply a 150 tonne EAF Quantum and a 150 tonne twin vacuum oxygen-blowing degassing plant. The scope encompasses the complete mechanical and electrical process equipment and the automation technology. This includes the automated scrap yard management, the automated charging process, automation of the oxygen injection and sand refilling, as well as the Level 2 automation. The EAF Quantum electricity consumption is considerably lower than that of a conventional electric arc furnace. Together with the lower consumption of electrodes and oxygen, this gives an overall advantage in the specific conversion cost of around 20 percent. In comparison to conventional electric arc furnaces, total CO2 emissions can also be reduced by up to 30 percent per metric ton of crude steel. An integrated dedusting system with modern automatic off gas control fulfills all environmental requirements.
The slab caster machine radius is ten meters. The caster produces slabs with a thickness of 225 millimeters in widths ranging from 900 to 1,800 millimeters. The maximum casting speed is 1.6 meters per minute. The plant casts ultra-low carbon to high carbon steels, peritectic, and HSLA steels, as well as API grades. The straight cassette-type Smart Mold is equipped with the Mold Expert breakout detection system, DynaWidth for automatic width adjustment, and the DynaFlex mold oscillator. LevCon automatic mold-level-control system with "autostart" casting functions and auto-adaptive dynamic bulging compensation and the Mold Expert on-line automatic breakout pre-detection will also be implemented. Bender and Smart Segments as well as I-Star rollers are used in the strand-guiding system.
The Dynacs 3D secondary cooling system dynamically calculates and controls the temperature profile along the entire strand. DynaGap Soft Reduction 3D is used to improve the interior quality of the slabs. The roll gap is dynamically adjusted during the final solidification in accordance with the operating points calculated by Dynacs. This minimizes segregation in the center of the strand.