Refractory mass and particles mixture for forming a refractory m

Details Refractory mass and particles mixture for forming a refractory m Refractory mass and particles mixture for forming a refractory m

1988-10-04

1991-01-29

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501 87, 501 88, 501 89, 501 90, 501 94, 501 96, 501 97, 501 98, 501100, 501101, C04B 3565, C04B 3552, C04B 3500

Patent

active

049886479

ABSTRACT:
A process of forming a coherent refractory mass on a surface comprises projecting against that surface, together with oxygen, a mixture of refractory particles and fuel which reacts in an exothermic manner with the projected oxygen to release sufficient heat to melt at least the surfaces of the refractory particles and thus form the refractory mass. The projected mixture contains, as fuel, finely divided particles of at least one element which is oxidizable to form a refractory oxide and it also contains carbonaceous particles which are of such a size or composition that carbon particles become occluded in the formed refractory mass. The mixture may contain, as said fuel, finely divided particles having a mean grain size of less than 50 .mu.m of silicon, aluminum and/or magnesium. The carbonaceous particles may comprise a carbonaceous core which is covered by a mantle inhibiting oxidation of the core. The mixture may further contain particles comprising a core of at least one element which is oxidizable to form a refractory oxide which is covered by a mantle inhibiting oxidation of the core. Suitable mantle materials include metallic oxides, nitrides and carbides.

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