Advanced Packed Bed Type 100 Steel Scrap Melting Process For Both EAF Works And Integrated Steel Works

摘要

"Advanced" Packed Bed Type Scrap Melting process (Advanced PSM) was verified to be one of the most attractive 100% steel scrap melting methods for both EAF works and integrated steel works through the scrap melting tests using the 15ton/hr-scale furnace of the SSE pilot plant and the numerical simulation by the 3-dimensional mathematical simulation model. The following results were obtained; 1) Shredded scrap could be melted by fuel ratio of 84 kg/tHM for scrap melting using blast furnace coke. 2) Low coke ratio of 42kg/tHM operation, equivalent to about 30% to total fuel, was performed stably. 3) Tin removal ratio of 44% (Target value of 29%) was obtained through the tin removing test using tin coated can scrap (Sn = 0.08 wt-%). 4) Iron yield of more than 99% and the refractory erosion of less than 0.15mm/heat were achieved. 5) Dioxins in outlet gas were less than 0.1ng-TEQ/Nm~2 through the exhausted gas treatment system of SSE. 6) Advanced PSM is available from pilot scale to commercial scale furnace as steel scrap melting process.