Slag-iron separation method in initial stage of reblowing after long-time damping down of large blast furnace

Abstract

The invention discloses a slag-iron separation method in an initial stage of reblowing after long-time damping down of a large blast furnace, and belongs to the technical field of molten iron smelting. The method comprises the following steps: (S101) a substrate is provided with an anchorage piece; then, a board refractory is poured; the thickness of the board refractory is larger than the heightof the anchorage piece; and a baffle plate is formed and dried for future use; (S102) a distance small pit is selected to enter the upstream; the baffle plate is aslant inserted in a main ditch; the board refractory faces an iron notch; and a gap between the baffle plate and the side of the main ditch is fully filled and compacted by yellow sand; (S103) the iron notch is opened; and when more slagor weak fluidity of the molten iron is generated during tapping, the baffle plate is not shifted, and slag and iron are discharged into a dry slag pit through a slag groove; and (S104) when the fluidity of the molten iron is normal, the baffle plate is pulled away, and the molten iron passes through a slag remover to enter a tank. The iron slag with weaker fluidity in the initial stage of reblowing after long-time damping down of the large blast furnace can be safely discharged, so that the heat consumption in the furnace is reduced, the recovery progress of the blast furnace is accelerated,the next discharge of the molten iron is fully prepared, and the smooth recovery progress of the blast furnace is guaranteed.

Description

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AI Technical Summary

Benefits of technology

This patented technology relates to methods used during manufacturing processes that improve the efficiency or quality of steel making operations such as smelting reduction (SR), improving cool down capabilities, increasing lifecycle retention rates, enhancing energy savings, minimizing downtime costs associated therewith, and achieving better results through improved control over the movement of slags towards the melter vessel walls.

Problems solved by technology

The technical problem addressed in this Patented Technological Problem relates how to separate metal scrap from hot melt castings without leaving any residue behind inside them. Current methods involve manual cleanup processes involving workers walking around while removing scraps, leading to increased risks associated with accidents such as burning eyesight at the melter hearth area near the shaft. Additionally, current methods require frequent maintenance and may lead to unsafe conditions like explosions caused by flammable materials present within the smelter's tunnel.

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