C - Chemistry – Metallurgy – 21 – C
Patent
C - Chemistry, Metallurgy
21
C
39/16, 158/8
C21C 5/38 (2006.01) C21C 5/40 (2006.01) G05D 7/06 (2006.01)
Patent
CA 1259902
METHOD OF OPERATING A GAS RECOVERY SYSTEM AND APPARATUS FOR EMPLOYING THE METHOD ABSTRACT OF THE DISCLOSURE A gas which is intermittently and/or irregularly released e.g. carbon monoxide-containing gas from an oxygen steel converter, is collected in a gas holder and delivered from the gas holder to a user installation. To avoid wastage of gas when the average release of gas varies and to permit use of a smaller gas holder, the output rate from the gas holder is determined by deriving a modified filling level signal by filtering a filling level signal of the gas holder so as to attenuate frequencies in the filling level signal above a predetermined limit frequency by a factor of at least ten, and adjusting the rate of delivery of the gas from a gas holder in dependence on variations in said modified filling level signal, such adjustment being in the same direction (up or down) as the variation in the modified filling level signal.
503654
Hoogovens Groep Bv
Ridout & Maybee Llp
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