Novel large bottom brick special for float glass kiln molten tin bath high-temperature section and preparation method thereof

Abstract

The invention belongs to the technical field of refractory materials, and particularly relates to a novel large bottom brick special for a float glass kiln molten tin bath high-temperature section anda preparation method thereof. The large bottom brick is prepared from the following raw materials in percentage by mass: 60-70% of synthetic material; 1-5% of refractory cement; 5-15% of sintered corundum; 5 -15% of mullite fine powder; 2-5% of silica fume; the synthetic material is prepared from the following raw materials in percentage by mass: 30-40% of Suzhou soil; 30-40% of bauxite; 20-25% of mullite; and 2-8% of a binding agent. After sintering the synthetic material, the materials are mixed, high-frequency pouring molding is performed and sintered in a kiln to obtain the finished product. The large bottom brick prepared by the method is high in strength, high in density and low in porosity, the air tightness of the whole tin bath can be improved, the oxygen pollution is reduced andthe cyanea phenomenon is avoided, free substances in tin liquor and drippings at the top of the tin bath are reduced, the yield of glass is increased by 5% or above and the profits of glass enterprises can be effectively increased.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a large bottom brick specially used for the high-temperature section of a tin bath of a float glass kiln and a preparation method thereof. Background technique [0002] The main carrier of the tin bath is tin liquid and glass liquid. The bottom lining of the tin bath carrying the two liquids is a large brick at the bottom of the tin bath. The liquid tin remains in a liquid state throughout the production process of the float flat glass. The specific gravity of tin liquid is 7.28g / cm 3 Much larger than the glass liquid specific gravity 2.5g / cm 3 The resulting 175-degree wetting angle (almost no wetting) makes the glass liquid always float on the surface of the tin liquid and becomes a good carrier for the glass liquid. [0003] The upper surface of the tin liquid contacts the glass liquid, and the direct contact object on the lower surface is the large...

AI Technical Summary

Problems solved by technology

Insufficient airtightness of the large bricks at the bottom of the tin bath will oxidize the tin liquid in the tin bath to produce stannous oxide and tin oxide, which will increase tin consumption and pollute the overall atmosphere of the tin bath and reduce the yield of glass

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