| 摘要 |
<p>1515097 Removing fumes from metallurgical converters AMERICAN AIR FILTER CO Inc 8 Feb 1977 [19 Feb 1976] 05164/77 Headings F4B and F4X In a fume extraction system for use with a tiltable metallurgical converter 2 and comprising an enclosure 16 provided with a fume hood 24 and exhaust duct 22 in its top wall 18 and a charging opening 28 in a side wall, a further fume hood 36 or 50 connected to an exhaust duet 37 or 62 is disposed above and outwardly spaced from the charging opening 28 to receive fumes emanating during each charging operation when the converter 2, is tilted to receive charge material from a ladle or bucket 6. When the charging operation is completed the converter is rotated to its normal vertical position within the enclosure 16 and the charging opening 28 closed by a pair of hingeably (see Figs. 2 and 3, not shown) or slidably mounted doors 51, 53. The fume collection hood 50 may include a pair of downwardly extending legs 52, 54 of U-shaped section at opposite sides of the opening 28, said legs communicating at their upper ends with exhaust conduits 56, 58.</p> |
