Effect of presence of carbon, iron, and sulphur on rate of alkali release from CaO-Al2O3-SiO2 slags

被引：0

作者：

Terry, B.S. ^{[1
]}

Asjadi, G.R. ^{[1
]}

机构：

[1] Imperial Coll of Science, London, United Kingdom

来源：

Ironmaking and Steelmaking | 1994年 / 21卷 / 02期

关键词：

Alkali metal compounds - Bubbles (in fluids) - Carbon - Chemical analysis - Composition effects - Graphite - Heating - Iron - Mass transfer - pH effects - Slags - Sulfur;

D O I：

暂无

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摘要：

The kinetics of alkali oxide (K2O or Na2O) release from a wide range of CaO-Al2O3-SiO2 slags containing additions of graphite, iron, iron sulphide, or calcium sulphide has been studied. The kinetics of alkali oxide release has been determined by heating in graphite crucibles and by subsequent chemical analysis of solidified slag samples. Additions of graphite powder to the slag result in an initial rapid loss of alkali. This is associated with the kinetics being controlled by mass transfer brought about by stirring of the slag phase by bubbles generated by slag-graphite reactions. The presence of iron in the slag results in the graphite crucible becoming more easily wetted by the slag and, hence, in an enhancement of reaction kinetics. The presence of sulphur in the slag results in the graphite crucible becoming less easily wetted by the slag and, hence, in a reduction of reaction kinetics.

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页码：140 / 144