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P ractical aspects oj the Gas-lift Aifixing R eactor (GM R ) Jor the treatmen t oj a large quantity oj molten Pig iron , and /noduction oj low sulphur iron with less than 0.005° oS were examined. The results are summarized as Jollows: (1) Strong dependence was observed between the desulphuri:;ing efficiency and circulation flo w rate oj molten metal Jar the G 111 R process. (2) W ater model experiments to estimate the circulation flow ra te in the industrial scale run were carried out. T he results were compared with volume circulation flow rate oj molten pig iron measured at the industria l pilot plant , and agreed satisJactorily with those Jor molten pig iron. (3) Experimental results oj the desulphuriz ing treatment wilh the 200 t-commercia l plant constructed in October 1974 at Kakogawa W orks, Kobe Steel, Ltd. , are shown as Jollows : I t was ea.ry to desul/)huri::.e about 200 t oj molten steelmaking pig iron at a time to as low as 0.002% S and under in 15 min using 5 kg t oj calcium carbide as a desulphuriz ing agent at a circulation flow ra te oj about 100 t/min.

On the Circulation Flow Rate and the Desulphurization of Molten Pig Iron in Gas-lift Mixing Reactor Process