Optimization of Total Steel Slag Processing System at Shiheng Special Steel's Steel-making Plant

CHENG Hongbo

Abstract：The converter slag treatment technology was optimized in Shiheng special steel making plant to adapt to the progress of steel-making technology.The plant has made a comprehensive and systematic improvement on the treatment process of hot stewed steel slag under pressure.A separate jaw crusher has been added between the 2#and 3#belts to solve the problem of repeated recycling of large steel slag;The simultaneous treatment of converter slag and refining slag was realized,and the content of free CaO in slag was reduced to less than 2%,and the particle size of steel slag was reduced to less than 10 mm.In addition,the innovative application of wet variable flow dedusting and ultra-low emission integrated tower technology effectively reduced the floor area by 30%,and the water consumption was reduced from 0.3 m3/t slag to 0.12 m3/t slag.At the same time,ensure that the dust concentration in the flue gas emission is controlled within 5 mg/m3.Through the wet electrostatic precipitator technology,the dusty steam produced by the stewing residue was successfully digested,and the discharge of dusty steam was completely eliminated.At the same time,the dust removal pipeline is equipped with an automatic flushing device,which effectively avoids the hardening problem of the pipeline,so as to realize a clean,environmental friendly,efficient and energy-saving slag treatment process.