還元性雰囲気下におけるCaO-Al<SUB>2</SUB>O<SUB>3</SUB> 2元系スラグの窒素および炭素吸収について

Abstract

In this study the absorption of N3−, CN− and C22− in CaO-Al2O3 binary slag melted in a graphite crucible was investigated. The following results were obtained.(1) As the mixed potential is more basic with increasing lime content, the absorption of nitrogen and carbon is accelerated. It is supposed that the reaction current of N3− approaches the limited current in the case of the sufficiently basic mixed potential.(2) The behavior of the absorption of N3−, CN− and C22− shows a remarkable difference between an atmosphere of N2-Ar and a N2-CO gas mixture. This may be due to the different effect of these atmospheres on the polarization character.(3) In the slag contained in an excess of carbon, the behavior of N3−, CN− and C22− is complicated and is divided into two stages.(4) It is predicted that the absorption of carbon in slag is cathodic controlled.