Method for tapping low-temperature slag iron from a taphole

Abstract

This invention belongs to the field of blast furnace ironmaking technology and discloses an operation method for discharging low-temperature slag and iron from the taphole, including: S1, detecting the temperature of the molten iron discharged from the taphole; when the temperature of the molten iron is lower than a first preset temperature, using a taphole opener to open a closed portion of the taphole; S2, removing the taphole opener, simultaneously introducing an oxygen-burning pipe and a compressed air blowing pipe into the taphole, introducing oxygen into the oxygen-burning pipe and igniting the oxygen pipe until the taphole is fully open; S3, shutting off the oxygen supply and removing the oxygen-burning pipe; S4, adding combustion-supporting powder into the compressed air blowing pipe and introducing compressed air; S5, gradually pushing the compressed air blowing pipe into the taphole until the length of the compressed air blowing pipe outside the taphole is equal to the safe length; S6, replacing with a spare compressed air blowing pipe and introducing it into the taphole, repeating S4 and S5 until all slag and iron are discharged from the taphole. This operation method can effectively discharge low-temperature slag and iron at a relatively low production cost and has good safety.

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