Refractory purging devices

摘要

A device for blowing gas into a metallurgical vessel contains at least one gas flow channel fluidly connecting a gas inlet located at one end to a gas outlet located at the opposite end. The channel is in the shape of a slit. The gas channel contains a series of continuous concave bridges connecting the opposing surfaces defining the channel, with their concave side oriented towards the gas outlet. The concave bridges are disposed in a staggered arrangement, such that any shortest line running from the gas outlet to the gas inlet of the channel necessarily intercepts the concave side of at least one bridge. The device is resistant to clogging by infiltrated molten metal or slag.

主权项

1. A refractory purging device for blowing gas into molten metal in a metallurgical vessel, the refractory purging device comprising a refractory main body which defines a gas inlet at a first longitudinal end for receiving purging gas, a gas outlet at a second longitudinal end for the purging gas to enter the molten metal, and a gas passage channel interconnecting the gas inlet and the gas outlet; wherein a plurality of molten metal receptacles for capturing or intercepting and retaining molten metal that flows reversely from the gas outlet into the gas passage channel is distributed in the gas passage channel, wherein,
each molten metal receptacle comprises a pocket portion or a miniaturized reservoir to retain the molten metal that is captured or intercepted at the molten metal capture aperture, the receptacles are forming bridges connecting first and second opposing surfaces defining the channel and the gas passage channel defines a gas flow direction and a metal flow direction which is opposite the gas flow direction, and wherein the molten metal receptacles comprise a wall portion which protrudes into the gas passage channel in a direction orthogonal or substantially orthogonal to the metal flow direction to define the molten metal capture aperture and the pocket portion or the miniaturized reservoir.