|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Investigation of Spent Refractory Lining in an Anode Baking Furnace
||Trond Brandvik, Zhaohui Wang, Arne Petter Ratvik, Tor Grande
|On-Site Speaker (Planned)
The refractory lining in anode baking furnaces is exposed to harsh chemical environment and thermal cycling. Here, we report on an autopsy of spent refractory lining in an anode baking furnace after 4000 days operation. Variation in the density and porosity across the bricks revealed 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, optical 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 calcium 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.
||Planned: Light Metals