Self flow type pumping wet spray high aluminum refractory material for steel ladle permanent lining

Abstract

The flowing pumped wet sprayed high aluminum refractory material for permanent lining of steel ladle consists of high alumina bauxite 68-83 wt%, high alumina fine powder of average diameter smaller than 4 micron 10-18 wt%, cyanite powder 1-7 wt%, superfine silica powder of average diameter smaller than 1 micron 1-4 wt%, calcium aluminate cement 4-6 wt%, and high efficiency water reducing agent 0.3-0.6 wt%. The flowing pumped wet sprayed high aluminum refractory material of the present invention has excellent flowing performance and high fire resisting performance.

Description

technical field [0001] The invention relates to ladle refractories Background technique [0002] Wet spraying technology for refractory materials is one of the major technological advances in the field of refractory materials in the world in recent years. Wet spraying technology can be applied not only to the lining of various metallurgical furnace linings, but also to the repair and maintenance of old furnace linings. In this method, the refractory material mixed with a certain amount of water is pumped to the nozzle, and the compressed air is used at the rear of the nozzle to add the coagulant to the mixture to quickly condense and spray it onto the construction surface to form a refractory lining. or patch layers. This process can form a refractory material layer with a required thickness without any mold; the density of the sprayed layer is close to that of the pouring forming layer; the construction investment is less manpower, the construction time is short (about ha...

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Problems solved by technology

Japanese Patent JP-269399/96 describes "a castable refractory composition for producing dense castable refractories and its wet spraying method", the refractory is a cem

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