Refractory lining for titanium ore beneficiation

F - Mech Eng,Light,Heat,Weapons – 27 – D

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F27D 1/00 (2006.01) C21B 13/10 (2006.01) C22B 34/12 (2006.01) F27D 1/16 (2006.01)

Patent

CA 2758574

The disclosure relates to a refractory which is resistant to corrosion which degrades the refractory during titaniumore beneficiation in a furnace, particularly a rotary hearth furnace. In particular, the disclosure relates to a layered refractory lining for a furnace, for use in a titanium ore beneficiation process wherein a titanium oxide-rich molten slag is formed, comprising: (a) a first layer comprising a major proportion of alumina and a minor proportion of zirconia; (b) a second layer comprising a resistant agent for the molten slag; wherein the second layer is between the slag and the first layer.

L'invention concerne un matériau réfractaire caractérisé par sa résistance à la corrosion qui dégrade le matériau réfractaire au cours de l'enrichissement du minerai de titane dans un four, en particulier un à four sole tournante. L'invention concerne en particulier un revêtement réfractaire stratifié pour four, destiné à être utilisé dans un process d'enrichissement du minerai de titane au cours duquel un laitier en fusion riche en oxyde de titane est formé, ledit revêtement comportant : (a) une première couche contenant une proportion élevée d'alumine et une plus faible proportion de zircone ; (b) une deuxième couche contenant un agent résistant destiné au laitier en fusion, la deuxième couche se situant entre le laitier et la première couche.

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