Apparatus for recovering unburned gases issued from metal refining furnaces

摘要

1,084,307. Confining noxious gases in industrial processes; metallurgical converters. YAWATA IRON & STEEL CO. Ltd., and YOKOYAMA ENGINEERING CO. Ltd. Sept. 25, 1964 [Oct. 2, 1963], No. 39207/64. Headings F4B and F4X. Gas issuing from an oxygen top blowing converter 1 passes through a cooler 5 containing cooling water pipes, a dust collector 7, control valve 8 and blower 9 and is stored in a gas holder 10. Between the converter 1 and the cooler 5 is a vertically displaceable hood 3 from which depends a ventilative shield 2, of which between 0À1 and 0À8 of the total area is open, the lower edge 15 of which is in contact with the converter. The shield allows limited egress of gas, which may be burnt on the outer surface of the shield, or ingress of air to reduce pressure fluctuations in the cooler 5. A controller 6 operates valve 8 to keep the pressure in the cooler 5 slightly in excess of the ambient pressure. A nitrogen screen may be set up around the shield.