Calcium aluminate glass kiln tin bath suspended ceiling brick and preparation method thereof

Abstract

The invention belongs to the refractory material technical field, and specifically relates to a calcium aluminate glass kiln tin bath suspended ceiling brick and a preparation method thereof. The calcium aluminate glass kiln tin bath suspended ceiling brick comprises the raw materials: 10-25% of a 6-3 mm dense calcium aluminate, 15-30% of a 3-1 mm dense calcium aluminate, 20-40% of a 1-0.1 mm dense calcium aluminate, 5-20% of a pure calcium aluminate cement powder, 5-20% of an alpha-aluminum oxide powder, and 0.2-3% of a siliceous compound powder. The prepared calcium aluminate glass kiln tinbath suspended ceiling brick has the advantages of uniform internal structure, low porosity, low heat conductivity and low high temperature creep rate, has no chemical reaction with an alkali metal oxide Na2O at a use temperature, solves the problem that glass defects are caused because a silicon aluminate suspended ceiling brick is easy to strip and peel off, reduces heat loss in a tin bath, andcan prolong the service life of tin bath suspended ceiling bricks; and the preparation method is scientific, reasonable and simple to implement.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a calcium aluminate glass kiln tin bath ceiling brick and a preparation method thereof. Background technique [0002] The tin bath is the key equipment of the float flat glass production line, which is mainly composed of tin bath bottom bricks and tin bath ceiling bricks. At present, tin bath ceiling tiles mainly adopt a combined structure, and most materials on the market are made of aluminum silicate. During its use, due to the Na contained in the glass composition when the glass ribbon is formed in the tin bath 2 About five percent of O volatilizes, making it react with silicon and aluminum in the roofing aluminosilicate refractory material to form a glass phase. As the glaze layer continues to thicken, it falls off to the glass under its own gravity. on the board, thereby causing defects in the glass. [0003] Chinese patent CN104326755A discloses ...

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a calcium aluminate glass kiln tin bath ceiling tile, which has uniform internal structure, low porosity, low thermal conductivity, low high temperature creep rate, and alkali metal oxide Na 2 O has no chemical reaction at the use temperature, which solves the problem that the aluminosilicate ceiling tiles are easily corroded by alkali metal oxides and causes peeling off, resulting in glass defects, and improves the service life of the tin bath ceiling tiles; the invention also provides its preparation method

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