<報文>高炉スラグ中の硫黄の挙動に関する研究

概要

論文の詳細を見る
The 'yellow water' which is occasionally found during the use of blast furnace slag for public works such as road construction and has been alleged as a cause of water pollution with large values of chemical oxygen demand (COD) is identified as the dissolution of sulfur in the slag into the environment and the formation of polysulfide ions. The behaviour of sulfur in the molten and solidified slag during the treatment for the prevention of occurrence of the 'yellow water' has been investigated. The following results are obtained : 1) The use of oxidizing gas for the slag in the molten state results in a sufficient rate of sulfur removal with a fairly small efficiency of gas utilization. 2) Addition of oxidizing compounds such as Fe_2O_3 into molten slag seems to be effective in the reduction of the amount of dissolved sulfur, on one hand, by the removal of the part of sulfur with the dissociated oxygen and, on the other, by the stabilization of sulfur compounds in the solidified slag by conversion of CaS to FeS.
東北大学の論文
1978-03-30