| 摘要 |
PCT No. PCT/NO85/00038 Sec. 371 Date Apr. 9, 1986 Sec. 102(e) Date Apr. 9, 1986 PCT Filed Jun. 21, 1985 PCT Pub. No. WO86/00695 PCT Pub. Date Jan. 30, 1986.A device for injecting gas into a hot melt, particularly molten metal, is suitable for being installed in the wall, particularly the bottom wall, of the container holding the melt. The device has three main sections including a front section of refractory material which is resistant to the melt in question, and which has a number of perforations (10) for introduction of gas into the melt, a middle section which at least partly consists of heat conductive material and possesses a number of perforations communicating with the perforations of the front section, and a rear section at least the outer (peripheral) part of which is of heat conducting material, which rear section in or close to its peripheral part has a helical duct communicating with the perforations of the middle section and adapted to pass the gas from an external gas source. The middle section is preferably divided into two part sections of which at least one, preferably the foremost part section, is made of a material of high heat conductivity, preferably copper or a copper alloy, whereas the rear part section preferably is of steel. |
