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Investigation of Spent Refractory Lining in an Anode Baking Furnace

Abstract

The refractory lining in anode baking furnaces is exposed to harsh chemical environment and thermal cycling. Spent refractory lining from an anode baking furnace after 4000 days in operation was investigated. Variation in the density and porosity across the bricks revealed that carbon build up in pores had taken place towards the anode side. The spent refractory bricks were investigated with respect to chemical and mineralogical composition by X-ray diffraction and electron microscopy. No significant change in the mineralogical composition across the brick could be detected by X-ray diffraction. Fluoride was not found in the bricks, while traces of sodium was shown to accumulate together with other impurities in the bricks. The changes in the chemical and mineralogical composition across the bricks are discussed in relation to possible chemical reactions taking place during anode baking.
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Category

Academic article

Language

English

Author(s)

Affiliation

  • SINTEF Industry
  • Norwegian University of Science and Technology

Year

2017

Published in

The Minerals, Metals & Materials Series

ISSN

2367-1181

Volume

2017

Issue

210819

Page(s)

1281 - 1288

View this publication at Norwegian Research Information Repository