JOM

, Volume 6, Issue 1, pp 33–45 | Cite as

Optimum composition of blast furnace slag as deduced from liquidus data for the quaternary system CaO-MgO-Al2O3-SiO2

  • E. F. Osborn
  • R. C. DeVries
  • K. H. Gee
  • H. M. Kraner
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Abstract

On the basis of liquidus measurements in the system CaO-MgO-Al2O3-SiO2 and previously published data, diagrams have been constructed at 5 pct Al2O3 intervals from 5 to 35 pct Al2O3. Liquidus temperatures and primary phase fields are shown. The optimum composition of a blast furnace slag for a given alumina content is indicated. At the optimum point, ordinary slags will be entirely liquid and will have maximum desulphurization potential and minimum viscosity. The relation of optimum composition of slags to the “plateau region” of the liquidus surface, and the application of these data on synthetic quaternary slags to actual slag compositions are discussed. Index of refraction of glasses is given as well as composition, temperature, and phase data for each mixture.

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Copyright information

© The Minerals, Metals & Materials Society 1954

Authors and Affiliations

  • E. F. Osborn
    • 1
  • R. C. DeVries
    • 1
  • K. H. Gee
    • 1
  • H. M. Kraner
    • 2
  1. 1.College of Mineral IndustriesThe Pennsylvania State UniversityState CollegeUSA
  2. 2.Bethlehem Steel Co.BethlehemUSA

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