含ニオブ溶融スラグのガスによる還元挙動

概要

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The behavior of gaseous reduction of molten slag containing niobium oxide was examined for the purpose of making ferro-niobium alloy of good quality. The molten slag containing niobium oxide was reduced in the crucibles made of high purity magnesia or pure iron with H_2 gas, CO gas and H_2-CO gas mixtures. The results are as folows ; (1) Iron oxide and P_2O_5 in the slag were easily reduced with H_2 gas while they were slightly reduced with CO gas at 1450℃. (2) The slag elements except FeO, Fe_2O_3 and P_2O_5 were scarcely reduced with H_2 or CO gas in the temperature range from 1350 to 1550℃. (3) The reduction of FeO with H_2 gas was accelerated by the increase in MgO content in slag. (4) The relation between (%FeO) and (%P_2O_5) in reduced slags is expressed in the following equation : (%P_2O_5)=0.037(%FeO)+0.04
社団法人日本鉄鋼協会の論文
1988-05-01