Circular seam type nitrogen seal apparatus

• Main Authors: SONG BINGJUN, ZHANG YUNQI, ZHANG YONG, ZHONG YONGLI, ZHAO DEJIAN
• Format: Patent
• Language: Chinese; English
• Published: 27.05.2009
• Subjects: CHEMISTRY; METALLURGY; METALLURGY OF IRON; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS

The utility model relates to an annular-gap nitrogen sealed device and belongs to the technical field of metallurgical equipment. The device comprises a blanking tube, a charging tube, a nitrogen chamber, and air intake pipe. The blanking pipe and the charging pipe are two section pipes with same outer diameters but different inner diameters; the joints of the pipes are two oblique sections, the clearances between the oblique sections form annular-gap structures; the clearances between the oblique sections are both 1.7 to 1.8 mm; and the oblique sections and the central lines of the pipes form a 75 to 85 degree angle. The utility model has the beneficial effects that the annular-gap nitrogen sealing device avoids blocking phenomenon, the device burning-out and the smoke overflow, increases the safety factor of an operator, and reduces the spare parts consumption.