Electric furnace steelmaking, scrap steel + molten iron, reducing electric furnace smelting time, energy saving and emission reduction
Electric furnace steelmaking has the advantages of short process, low investment, fast construction, and outstanding energy saving and emission reduction effects.
Keyword：Electric furnace steelmaking, energy saving and emission reduction
At present, the steelmaking methods commonly used in the world’s iron and steel manufacturing mainly include converter steelmaking and electric furnace steelmaking. Compared with converter steelmaking, electric furnace steelmaking has the advantages of shorter process, less investment, faster construction, and outstanding energy saving and emission reduction effects. It is estimated that using 1 ton of scrap steel in steelmaking can reduce the consumption of 1.7 tons of concentrate, save 60% of energy and 40% of new water compared to using pig iron, and can reduce emissions by 86% of waste gas, 76% of waste water, 72% of waste residue, and solid emissions. (including waste rock and tailings from the mine part) 97%.
The time from tapping to tapping of the electric furnace is one of the typical indicators to measure the production efficiency of the electric furnace. With the increase in the proportion of molten iron and the large-scale electric furnace equipment, especially the wide application of high-power burners, cluster oxygen lances, and furnace wall multi-function guns, the smelting cycle of electric furnaces has approached the level of 2 hours from full scrap smelting. , gradually transitioning to a level close to 1 hour.
Therefore, all countries in the world generally pay more attention to the development of electric furnace short-process steelmaking production technology with scrap steel as the main raw material. In 2015, the proportion of world electric furnace steel production was 25.1%; in the same period, the proportion of electric furnace steel in the United States was 62.7%, the proportion of electric furnace steel in Europe was 39.4%, the proportion of electric furnace steel in South Korea was 30.4%, and the proportion of electric furnace steel in Japan was 22.9%.