The control of liquid phase behavior during sintering of Clay/EAF dust bodies (Clay/EAF dust계 시편의 소결과정 중 액상거동 제어)

KANG SEUNG GU (강승구); 김광수

The control of liquid phase behavior during sintering of Clay/EAF dust bodies

Journal of the Korean Crystal Growth and Crystal Technology
Abbr : J. Korean Cryst. Growth Cryst. Technol.
2005, 15(2), pp.68-74
Publisher : The Korea Association Of Crystal Growth, Inc.
Research Area : Engineering > Materials Science and Engineering

KANG SEUNG GU ¹, 김광수 ¹

¹경기대학교

Accredited

ABSTRACT

The electrical arc furnace (EAF) classified as a special waste contains many flux components producing melts during a sintering process, so it decreases the sintering temperature and improves the mechanical properties of specimens. Increasing dust content in a clay-dust system brick, however, may cause the fraction defective higher due to the excessive liquid produced. To control the liquid behavior produced during sintering process for the clay-dust system specimens, the Al2O3 was added and the physical properties were analyzed. The microstructure for the clay-dust system body sintered with Al2O3 became homogeneous and the overall size of pores decreased. Adding Al2O3 to clay-dust system body increased the mechanical properties and the temperature of maximum strength increased as much as 50oC, and the apparent density increased and the absorption decreased. The mullite (3Al2O3?SiO2) was produced during sintering process by reaction of Al2O3 and SiO2 which could participate to liquid-producing-process and the viscosity of melts increased which was proved by measuring a critical viscosity temperature (Tcv) therefore, the refractoriness of specimens were improved to lower the fraction defective.

KEYWORDS

EAF dust, Liquid phase sintering, Flux, Al2O3, Critical viscosity temperature

Citation status

* References for papers published after 2023 are currently being built.

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