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Manufacturing method of float glass, float glass and manufacturing equipment

A float glass and manufacturing equipment technology, which is applied in the field of float glass and manufacturing equipment, can solve the problems of the lower surface of the glass not being flat, protruding material impurities, affecting the quality of the glass, etc., so as to improve the overall distribution of defects and scratches, reduce the The effect of scratch depth and overall uniform distribution

Inactive Publication Date: 2014-07-23
CDGM OPTICAL GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] On the whole, the former of the existing improved methods does not solve the problem of SO 2 The problem of the speed of the gas reacting to form a sulfate lubricating layer, although the latter solves this problem to a certain extent, but it uses catalysts such as metal oxides. When such metal oxides are supplied to the lower surface of the glass, due to the temperature If it is too high, the catalyst is easy to adhere to the lower surface of the glass, causing the lower surface of the glass to be uneven, and there are protruding impurities, which will affect the quality of the glass

Method used

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  • Manufacturing method of float glass, float glass and manufacturing equipment
  • Manufacturing method of float glass, float glass and manufacturing equipment
  • Manufacturing method of float glass, float glass and manufacturing equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Example 1——Only feed SO under oxidizing environment 2 Gas forms a lubricating layer:

[0055] Continuously supply molten glass to the horizontal bath surface of a molten metal bath containing molten metal to form a glass ribbon, lift the glass ribbon from the bath surface, and transport it to a slow cooling furnace by a plurality of conveying rollers, where the glass ribbon In the lifted and transported state, a lubricating layer is formed at the bottom of the glass ribbon; the lubricating layer is formed in such a way that only SO 2 way, the equipment can refer to the attached figure 1 device equipment.

experiment example 2

[0056] Experimental Example 2——The first implementation mode of the present application: Introducing SO in an oxidizing environment 2 +The two gases of water vapor form a lubricating layer

[0057] Continuously supply molten glass to the horizontal bath surface of a molten metal bath containing molten metal to form a glass ribbon, lift the glass ribbon from the bath surface, and transport it to a slow cooling furnace by a plurality of conveying rollers, where the glass ribbon In the lifted and conveyed state, a lubricating layer is formed at the bottom of the glass ribbon; the lubricating layer is formed by supplying SO to the lower surface of the glass ribbon under an oxidizing environment. 2 and water vapor, the equipment can refer to the attached figure 2 device equipment. attached figure 2 6-1 for water vapor gas supply device and SO 2 The gas supply device 6-2 is only a partial example; this embodiment mainly adopts the method of supplying water vapor and SO to the ...

Embodiment 3

[0058] Example 3——the second implementation mode of the present application: passing wetted SO under oxidizing environment 2 Gas forms a lubricating layer

[0059] According to the manufacturing method of float glass described in the present application, molten glass is continuously supplied to the horizontal bath surface of a molten metal bath containing molten metal to form a glass ribbon, the glass ribbon is lifted from the bath surface, and passed through A plurality of conveyor rollers are transported to the slow cooling furnace, and when the glass ribbon is lifted and transported, a Glauber's salt film is formed at the bottom of the glass ribbon; the formation of the Glauber's salt film is in the following manner: SO 2 After passing through the aqueous liquid, the wetted SO with moisture 2 Gas feed, using the temperature near the glass ribbon, to supply SO at the lower surface of the glass ribbon 2 Gas and water vapor, equipment can refer to attached image 3 . This ...

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Abstract

The invention discloses a method for forming a lubricating layer on the lower surface of glass, a method for manufacturing float glass by using the method, float glass manufactured by using the method and corresponding manufacturing equipment. The manufacturing method of float glass comprises the following steps: continuously supplying molten metal to the horizontal bath level of a molten metal bath containing molten metal, thus forming a glass tape; lifting the glass tape from the bath level, and delivering to a slow cooling furnace through multiple delivery rollers; and in the process of lifting and delivering the glass tape, supplying SO2 gas and vapor to the lower surface layer of the glass tape in an oxidizing environment, thus forming the lubricating layer on the lower surface layer of the glass tape. According to the manufacturing method and equipment in the application, the speed of reaction between the SO2 gas and alkali metal, alkali earth metal and other oxides in the glass can be effectively improved, and the lower surface of the glass tape can be prevented from appearance of various impurities; and meanwhile, the total number of defects at the bottom of the glass can be effectively decreased (6 / m<2>), and the scratch depth at the bottom of the glass can be decreased (80mu m or below).

Description

technical field [0001] The invention relates to a method for forming a lubricating layer on the lower surface of glass, a method for manufacturing float glass by using the method, float glass prepared by the method and corresponding manufacturing equipment. Background technique [0002] In the manufacture of float glass, molten glass is continuously supplied to the horizontal bath surface of a bath containing molten metal to form a glass ribbon, and then the glass ribbon is lifted from the outlet of the molten metal bath and pulled out of the molten metal bath. The glass ribbon is formed into a target thickness by a tensile force that lifts the glass ribbon from the outlet of the bath. Then, the glass ribbon is conveyed by conveying rollers, sent to the slow cooling furnace, and slow cooled while being conveyed in the slow cooling furnace. Thereafter, the glass ribbon is cut into predetermined lengths to manufacture plate-shaped float glass. [0003] However, in the manufa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C23/00
Inventor 云仕东王洪成杨云王永康宋纯才
Owner CDGM OPTICAL GLASS