石灰石添加自溶性ペレットの常温および低温度域還元性状

概要

論文の詳細を見る
This paper describes experimental results of physical and reducing properties of pellets up to 1100℃ of reduction temperature as a function of basicity, SiO_2 contents and indurating temperature during the addition of limestone. These properties are closely correlated to the bonding structures of indurated pellets which are classified into 6 types. Those are hematite (A), hematite+low-basicity silicate slag (B), hematite+calcium ferrite (C), hematite+high basicity silicate slag+di-calcium silicate (D), A+B, and C+D bonding structures. A-type pellets have lower crushing strength and higher open porosity, swelling index and reduction degree, B-type ones have the highetst crushing strength and swelling index and the lowest open porosity and reduction degree, C-type ones have the highest open porosity and reduction degree and the lowest swelling index, and D-type ones have much higher crushing strength and reduction degree and much lower swelling index. Therefore, physical and reducing properties of pellets change remarkably by adding limestone. Pellets with (C+D)-bonding structures give the highest levels of crushing strength and reduction degree, and the lowest swelling index.
1980-07-01