Manufacturing method of high strength float glass

Abstract

The invention relates to a manufacturing method of high strength float glass. Quartz sand, alumina, soda ash, calcium carbonate and high-purity magnesium oxide are mixed uniformly, the uniform mixture is sent to a float glass melting furnace, high temperature melting is carried out in the float glass melting furnace to obtain a melt, the melt flows into a working pool after being clarified and homogenized, and enters a forming tin bath from a launder in the working pool to form a strip continuous glass plate, the strip continuous glass plate is sent to a thermal insulation box after being annealed, surface pretreatment is carried out, and then glass subjected to surface pretreatment is sent to a hardening pool to be hardened; the hardened strip continuous glass plate is cut into finished glass of a specified size on an automatic cutting device after dried. The high strength float glass disclosed by the invention is high in strength, and the bending strength of the high strength float glass can reach 82.7MPa and is 1.5 times that of the ordinary float glass, and the flatness is good; furthermore, the bending strength of the high strength float glass can reach 335MPa after the high strength float glass is subjected to toughening treatment, and the high strength float glass is high in application value.

Description

technical field [0001] The invention relates to a method for manufacturing high-strength float glass, which belongs to the technical field of glass manufacturing. Background technique [0002] At present, the main production method of glass is float method. Float glass and its products are widely used in construction, transportation and various economic sectors. Its output and use occupy a prominent position in various glass products. With the rapid development of electronics, chemical industry, light industry, machinery and other industries and the increasingly fierce market competition, the quality requirements for glass products are getting higher and higher. At the same time, industrial energy and resources are becoming increasingly tight. Therefore, shorten the development cycle and optimize the process. , Improving product quality and reducing production costs have become objective requirements for enterprises to be invincible in market competition. [0003] The exist...

AI Technical Summary

Problems solved by technology

[0003] The existing float glass affects the microstructure of the float glass due to its composition, melting, forming, annealing, transmission and other factors, resulting in a large number of tiny cracks on the surface of the float glass. These micro cracks are difficult to detect with the naked eye. Under certain external conditions, it will expand into a crack, causing the float glass plate to break and affecting the strength of the float glass

And commonly used SO 2 Repair the above defects, that is, when the temperature is greater than 550 ° C, SO 2 with Na on the glass surface 2 O and CaO react with each other to form sodium sulfate and calcium sulfate. Although this reaction causes the active ions of some components in the float glass to diffuse and exchange ions, sodium sulfate and calcium sulfate cannot completely fill the cracks. There are still some fine grooves or protrusions, which have a limited effect on improving the strength of float glass