Activity of MnO in Blast Furnace-type Slags

Abstract

Abstract: The activity of MnO in blast furnace-type slags CaO-SiO_2,CaO-SiO_2-Al_2O_3 and CaO-SiO_2-Al_2O_3-MgO at 1500℃ has been measured in a graphite crucible with Ag and Sn as solvent metals.The agreement between the values of γMnO obtained from the experimental results using Ag and Sn separately as the solvent metal is excellent.The major errors in the previous studies have proved to be the failure to take into account the exchange reactions involving Si and Mn and insufficient time for the establishment of equilibrium between slag and solvent metal. A new method is suggested for determining the activities of elements in metallic solutions. The method involves the separate equilibration of two metallic alloys,one of which contains the component of interest at a known activity, with a single slag.

Key words: blast furnace slag, activity, MnO

ZHOU Jicheng TIAN Yanwen JIANG Zuoyao YANG Shaowei Shanghai Institute of Metallurgy,Academia Sinica,Shanghai,China.Northeast University of Technology,Shenyang,China.Jiao Tong University,Shanghai,China.. Activity of MnO in Blast Furnace-type Slags[J]. J Mater Sci Technol, 1989, 5(4): 259-263.

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Activity of MnO in Blast Furnace-type Slags

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