Steelmaking technologies mainly include converter steelmaking technology and EAF steelmaking technology. Converter steelmaking is a common process during which high-temperature combustion and oxygen injection are used to remove impurities from the molten steel, such as sulfur, phosphorus, etc. By controlling the amount of oxygen injection and production time, the oxygen atmosphere and reaction conditions inside the furnace are regulated to control the composition and quality of the alloy. Subsequently, the refined molten steel is transported to the turret via a ladle. After the turret rotates to the casting position, the molten steel is poured into the tundish, which then distributes the steel water through nozzles to each mold. After cooling and solidification, it forms shaped raw steel billets. Electric arc furnace (EAF) steelmaking is a method of steel production that uses the thermal effect of an electric arc to heat the charge materials for smelting. Electrical energy is input into the EAF steelmaking furnace through graphite electrodes, using the electric arc formed between the electrode ends and the furnace charge as the heat source for steelmaking. The EAF steelmaking process mainly uses scrap steel as raw material, with alloy, lime, and carbon increaser as auxiliary materials. The basic EAF steelmaking process includes slag removal and furnace relining, loading of metallic charge, power feeding, melting, oxidation, reduction refining, and tapping. In this process unit, the EAF steelmaking scrap ratio is roughly 30%.
Search
