Publication detail

EXAMINATION OF REFRACTORY SILICA BRICKS EXPOSED IN VARIOUS CONDITIONS

VŠIANSKÝ, D. NEVŘIVOVÁ, L. LANG, K. KOTOUČEK, M.

Original Title

EXAMINATION OF REFRACTORY SILICA BRICKS EXPOSED IN VARIOUS CONDITIONS

English Title

EXAMINATION OF REFRACTORY SILICA BRICKS EXPOSED IN VARIOUS CONDITIONS

Type

conference paper

Language

en

Original Abstract

Phase composition and microstructure of silica bricks used as linings of coke ovens and pipes for more than twenty years were examined by means of X-ray diffraction, light microscopy and scanning electron microscopy and microanalysis. Properties of corroded silica brics were compared to the original sample stored in laboratory. Transformation of cristobalite to tridymite and increase of tridymite crystallite size due to repeated heating and cooling was observed. Tridymite polymorphism and tridymite/cristobalite ratio differences in the inner and outer part of silica pipe was documented and discussed. Cristobalite twins observable by light microspe occured in a sample of furnace linning which was partly molten during its use. Reasons of these mineralogical and microstructural changes are discussed.

English abstract

Phase composition and microstructure of silica bricks used as linings of coke ovens and pipes for more than twenty years were examined by means of X-ray diffraction, light microscopy and scanning electron microscopy and microanalysis. Properties of corroded silica brics were compared to the original sample stored in laboratory. Transformation of cristobalite to tridymite and increase of tridymite crystallite size due to repeated heating and cooling was observed. Tridymite polymorphism and tridymite/cristobalite ratio differences in the inner and outer part of silica pipe was documented and discussed. Cristobalite twins observable by light microspe occured in a sample of furnace linning which was partly molten during its use. Reasons of these mineralogical and microstructural changes are discussed.

Keywords

silica bricks, corrosion, tridymite, cristobalite

RIV year

2013

Released

18.09.2013

Publisher

ECREF

Location

Německo

ISBN

978-3-9815813

Book

56th International Colloquium on Refractories 2013

Pages from

168

Pages to

172

Pages count

5

BibTex


@inproceedings{BUT102953,
  author="Dalibor {Všianský} and Lenka {Nevřivová} and Karel {Lang} and Miroslav {Kotouček}",
  title="EXAMINATION OF REFRACTORY SILICA BRICKS EXPOSED IN VARIOUS CONDITIONS",
  annote="Phase composition and microstructure of silica bricks used as linings of coke ovens and pipes for more than twenty years were examined by means of X-ray diffraction, light microscopy and scanning electron microscopy and microanalysis. Properties of corroded silica brics were compared to the original sample stored in laboratory. Transformation of cristobalite to tridymite and increase of tridymite crystallite size due to repeated heating and cooling was observed. Tridymite polymorphism and tridymite/cristobalite ratio differences in the inner and outer part of silica pipe was documented and discussed. Cristobalite twins observable by light microspe occured in a sample of furnace linning which was partly molten during its use. Reasons of these mineralogical and microstructural changes are discussed.",
  address="ECREF",
  booktitle="56th International Colloquium on Refractories 2013",
  chapter="102953",
  howpublished="print",
  institution="ECREF",
  year="2013",
  month="september",
  pages="168--172",
  publisher="ECREF",
  type="conference paper"
}