Decomposition of CaCO3 in Molten Borate and Its Effect on Slag Foaming Behavior

Shaojun Chu; Qiang Niu; Keng Wu; Ying Wang

doi:10.2355/isijinternational.40.549

Decomposition of CaCO₃ in Molten Borate and Its Effect on Slag Foaming Behavior

Shaojun Chu, Qiang Niu, Keng Wu, Ying Wang

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Keywords: slag foaming, calcium carbonate, thermal decomposition, model, sodium borate melt, foam, foaming height, calcia

JOURNAL FREE ACCESS

2000 Volume 40 Issue 6 Pages 549-553

DOI https://doi.org/10.2355/isijinternational.40.549

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Abstract

A model for thermal composition of CaCO₃ in Na₂B₄O₇ molten slag is presented in the paper. The experimental results show that the size of CaCO₃ particle and CaO content in slag have effect on foaming by gas inside the slag, and these effects are all dependent on the decomposition behavior of CaCO₃ in molten slag. Therefore, the foaming index, Σ, which is measured with bubbling, cannot be employed to evaluate the stability of foams from gas inside the slag.

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