GAS BLOWING PLUG FOR STIRRING MOLTEN METAL

• Main Authors: FUJIYOSHI RYOMA, IMAI SHINOBU, TOMITANI NAOSHI
• Format: Patent
• Language: English; Japanese
• Published: 03.06.2021
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHEMISTRY; METALLURGY; METALLURGY OF IRON; PERFORMING OPERATIONS; POWDER METALLURGY; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TRANSPORTING; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS

To obtain a bottom blowing plug having excellent durability in which thin tubes on the inner surface side of a furnace are arranged at high density by reducing the interval between the thin tubes while securing easy welding workability between the thin tubes and a wind box.SOLUTION: A multi-hole plug includes an introduction pipe 2 having a connection part 2a at one end through which a gas for stirring molten metal flows, a wind box 1 being connected to the connection part 2a of the introduction pipe 2 and having a wind box top surface 1a at the upper part with its inside formed hollow, a thin-tubes group 3A including a plurality of hollow tubes respectively having a fixing part 3a at one end and an opening part 3b at the other end, each fixing part 3a fixed to the wind box top surface 1a in a state of communicating with the inside of the wind box 1, and a refractory 4 in which the thin-tubes group 3A is embedded. The thin-tubes group 3A includes thin tubes 131-147 respectively having a bent part 3d.SELECTED DRAWING: Figure 2 【課題】細管と風箱との容易な溶接作業性を確保したまま、炉内面側の細管同士の間隔を小さくして細管同士を高密度に配置して、耐用性に優れる底吹きプラグを得ること。【解決手段】一方端に接続部２ａを有し、溶融金属を撹拌するガスが流れる導入管２と、導入管２の接続部２ａが接続され、上部に風箱上面１ａを有し、内部が中空に形成されている風箱１と、一方端に固定部３ａと、他方端に開口部３ｂとを有する複数の中空管であり、風箱上面１ａに風箱１の内部と連通した状態で各々の固定部３ａが固定されている細管群３Ａと、細管群３Ａが埋設されて形成されている耐火物４と、を備えているマルチホールプラグであって、細管群３Ａには、曲がり部３ｄを含んでいる細管１３１〜１４７が含まれている。【選択図】図２