Production method capable of improving surface roughness of float glass

Abstract

The invention relates to a production method capable of improving the surface roughness of float glass. After uniformly mixing quartz sand, aluminum oxide, soda ash, calcium carbonate, magnesium carbonate and lithium carbonate, they are sent into a float glass melting furnace, and the float glass The molten glass is melted at high temperature in the melting furnace, and the molten glass flows into the working pool after being clarified and homogenized. The molten glass enters the forming tin tank from the launder in the working pool to form a strip-shaped continuous glass plate. The strip-shaped continuous glass plate is annealed. , Cutting process to make finished glass. The method replaces part of the quartz sand with lithium carbonate and reduces the content of magnesium carbonate by half to overcome and solve the problem of poor flatness in the process of polishing and edge drawing; The reaction process inside the tin bath prevents micro-wrinkles on the surface of the finished glass. The surface roughness of the float glass produced by the above-mentioned production method can reach below 0.004 μm, and the flatness is high.

Description

technical field [0001] The invention relates to a production method capable of improving the surface roughness of float glass, belonging to the technical field of glass manufacturing. Background technique [0002] There are three types of flat glass in the world today: flat drawn, float, and rolled. Among them, float glass accounts for more than 90% of the current total glass production, and is the basic building material in the world's architectural glass. Founded in 1952, the float glass production process sets the world standard for high-quality glass production. [0003] During the float glass production process, the glass is polished, edged and shaped in a tin bath. During the polishing and edge-drawing process of the glass in the tin bath, due to the high viscosity, defects of poor flatness are prone to occur during the polishing and edge-drawing process. Moreover, the tin element in the tin bath forms tin ions under the action of the oxidant in the glass component,...

AI Technical Summary

Problems solved by technology

Due to the Sn on the glass surface 2+ Tin ions contact with oxygen in the air and are oxidized to Sn 4+ , Sn 4+ It will draw the surrounding oxygen closer, and shrink the volume of the region within the bond length range, thereby producing micro-folds on the glass surface, making the surface of the float glass rough and the flatness reduced