C - Chemistry – Metallurgy – 21 – C
Patent
C - Chemistry, Metallurgy
21
C
39/13
C21C 5/28 (2006.01)
Patent
CA 1119398
METHOD OF CONTROLLING THE SUCTION GAS PRESSURE OF A SULFURIC ACID PLANT FOR TREATMENT OF SMELTER EXHAUST GAS Abstract of the Disclosure In a system wherein exhaust gases containing SO2 are fed to a sulfuric acid plant from multiple furnaces, in- cluding an intermittently operated furnace (such as a copper or nickel converter furnace), a method of automatically controlling the gas pressure to within a predetermined range at a point just upstream of the exhaust gas pretreating equipment at the inlet of the sulfuric acid plant so as to compensate for the fluctuation in the exhaust gas pressure resulting from start up and stopping of the operation of the intermittently-operated furnace. By this method, the dis- advantages caused by large gas fluctuations, i.e., the leakage of SO2-containg gas and the suction of excess free air can be prevented. -1-
336323
Kaneko Isao
Kawazoe Masayuki
Sasaki Atsuo
Tomoda Yasuro
Kirby Eades Gale Baker
Sumitomo Metal Mining Co. Ltd.
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