硬質水砕スラグ製造温度域における高炉スラグと合成スラグの粘度, 表面張力, 密度

概要

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Viscosity, surface tension, and density of blast furnace slag and synthetic slags which had nearly the same composition as that of the blast furnace slag were measured below the smelting temperature. The following results were obtained : (1) Viscosity of synthetic CaO-SiO_2-Al_2O_3-MgO slags increases with increasing SiO_2 and Al_2O_3 contents, and decreases with increasing CaO and MgO contents. Small amounts of another compounds contained in the blast furnace slag cause the decrease of vicosity, and the extent of effect of these compounds on viscosity is similar to that of MgO. (2) Surface tension of quaternary CaO-SiO_2-Al_2O_3-MgO system is not influenced by the interchange of Al_2O_3 and MgO but increases markedly with increasing (CaO/SiO_2) mol. The surface tension of the blast furnace slag is 472 to 498dyn/cm in the temperature range 1380°to 1500℃, and sulfur has a great influence on the decrease of surface tension. The surface tension of all the systems studied here decreases with increasing temperature. (3) Great increase of viscosity of blast furnace slag occurs when cooled below 1405℃ to 1375℃, and it is made clear that this temperature range corresponds to the upper limit of the operation temperature to produce hard granulated slag in the factory.
社団法人日本鉄鋼協会の論文
1981-07-01