Production method capable of improving surface roughness of float glass

A surface roughness, float glass technology, applied in the field of glass manufacturing, can solve the problems of flatness drop, float glass surface roughness, etc., to achieve the effect of high flatness, easy subsequent control and polishing

Inactive Publication Date: 2016-10-12
TG ANHUI GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]65.1Kg of quartz sand, 3.1Kg of alumina, 23.5Kg of soda ash, 16.6Kg of calcium carbonate, 7.6Kg of magnesium carbonate, and 28.6Kg of lithium carbonate were weighed according to the proportion of the formula, and the components were fully mixed to obtain a batch. Mix the batch materials evenly and send them to the float glass melting furnace, where they are melted at high temperature to form glass liquid. The melting temperature in the float glass melting furnace is 1590°C; the float glass melting furnace is still full of reducing The reducing gas is composed of hydrogen and ammonia, and the mass of hydrogen in the reducing gas accounts for 0.7% of the total mass of the reducing protective gas; when the temperature inside the float glass melting furnace is 25~790°C, the The air pressure is 101.3kPa; when the temperature of the float glass melting furnace is 790~830°C, the air pressure inside the float glass melting furnace is 136.5kPa; when the temperature of the float gl...

Embodiment 2

[0031] 65.9Kg of quartz sand, 3.2Kg of alumina, 23.8Kg of soda ash, 17.2Kg of calcium carbonate, 8.9Kg of magnesium carbonate, and 30.1Kg of lithium carbonate were weighed according to the formula ratio, and the components were fully mixed to obtain a batch. Mix the batch materials evenly and send them to the float glass melting furnace, where they are melted at high temperature to form glass liquid. The melting temperature in the float glass melting furnace is 1593°C; the float glass melting furnace is still full of reducing The reducing gas is composed of hydrogen and ammonia, and the mass of hydrogen in the reducing gas accounts for 0.8% of the total mass of the reducing protective gas; when the temperature inside the float glass melting furnace is 25~790°C, the The air pressure is 101.3kPa; when the temperature of the float glass melting furnace is 790~830°C, the air pressure inside the float glass melting furnace is 136.9kPa; when the temperature of the float glass melting...

Embodiment 3

[0035] 66.9Kg of quartz sand, 3.3Kg of alumina, 24.2Kg of soda ash, 19.1Kg of calcium carbonate, 9.5Kg of magnesium carbonate, and 31.8Kg of lithium carbonate were weighed according to the formula ratio, and the components were fully mixed to obtain a batch.

[0036] Mix the batch materials evenly and send them to the float glass melting furnace, where they are melted at high temperature to form glass liquid. The melting temperature in the float glass melting furnace is 1595°C; the float glass melting furnace is still full of reducing The reducing gas is composed of hydrogen and ammonia, and the mass of hydrogen in the reducing gas accounts for 0.9% of the total mass of the reducing protective gas; when the temperature inside the float glass melting furnace is 25~790°C, the The air pressure is 101.3kPa; when the temperature of the float glass melting furnace is 790~830°C, the air pressure inside the float glass melting furnace is 137.1kPa; when the temperature of the float glas...

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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,...

Claims

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Application Information

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IPC IPC(8): C03B18/14C03C3/087
CPCC03B18/14C03C3/087C03C2201/50C03C2201/54
Inventor 林嘉宏
Owner TG ANHUI GLASS
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