Refractory material for electrolytic cells, method for the...

C - Chemistry – Metallurgy – 04 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C04B 35/10 (2006.01) C04B 35/101 (2006.01) C04B 35/66 (2006.01) C25C 3/08 (2006.01)

Patent

CA 2070977

The invention relates to a material which is refractory, porous, resistant to fluorine-containing gases, stable in its volume and heat-insulation, particularly in the form of formed bricks, for a refractory, heat-insulating lining in electrolytic cells, in which metal aluminum is extracted by electrolysis from aluminum oxide dissolved in a fluoride melt; the material has an Al2O3 content of over 50 wt% and a TiO2 content of 2.5-10 wt% and during the action of fluorine-containing gases at temperatures between 700 and 1000°C in the area of the material exposed to the fluorine gas, on free surfaces, particularly at the boundary surfaces of intergranular hollow spaces, needle-shaped TiO2 crystals and/or TiO2-containing crystals are formed, growing without regularity into the porous space. The invention furthermore relates to a method for the manufacture as well as the use of the refractory material.

Matière réfractaire, poreuse, résistant aux gaz fluorés, stable du point de vue volumique et thermique, se trouvant particulièrement sous forme de briques, pour revêtement réfractaire et calorifure dans les cellules électrolytiques, où l'aluminium métallique est extrait par électrolyse à partir d'oxyde d'aluminium dissous dans du fluorure fondu; la matière renferme plus de 50 % en poids d'Al2O3 et de 2,5 à 10 % en poids de TiO2 et, lors de l'action des gaz fluorés à des températures comprises entre 700 et 1000 °C dans la zone de la matière exposée au gaz fluoré, sur les surfaces libres, notamment au niveau des surfaces limites à creux intergranulaires, il y a formation, avec croissance régulière dans les creux poreux, de cristaux de TiO2 en forme d'aiguilles et (ou) de cristaux renfermant du TiO2. De plus, l'invention présente des méthodes pour la production et l'utilisation de la matière réfractaire.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Refractory material for electrolytic cells, method for the... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Refractory material for electrolytic cells, method for the..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Refractory material for electrolytic cells, method for the... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1760523

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.