Improvements in or relating to Method of and Device for Controlling the Collection of Waste Gas of Oxygen Refining in Steel Making Processes

摘要

1,194,689. Controlling converter chimney draught. COMPAGNIE DES ATELIERS ET FORGES DE LA LOIRE (ST. CHAMOND, FIRMINY, ST. ETIENNE, JACOB-HOLTZER). 20 Dec., 1967 [7 Feb., 1967], No. 57914/67. Addition to 1,110,254. Heading F4B. [Also in Division G3] In the waste gas collecting system of an oxygen steel refining process, a damper 5 is controlled to maintain the difference in pressure between the interior of the hood 3 and the ambient air at a value modified by the temper. ature of the gases within the hood. Signals representing the pressures inside and outside the hood 3 are fed to a computer 8 together with a signal representing the temperature in the hood and a signal representing the deviation from a desired value of the level with respect to the pressure measuring point within the hood of the combustion zone or waste gas boundary is used to control the damper.