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Method of manufacturing float glass

A float glass, melting glass technology, applied in the field of manufacturing float glass

Inactive Publication Date: 2003-09-17
舱壁玻璃公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Here, oxygen is an undesired interfering impurity for the float process

Method used

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  • Method of manufacturing float glass
  • Method of manufacturing float glass

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Embodiment Construction

[0027] Liquid tin has a particularly high affinity for oxygen, so that even tiny amounts of oxygen lead to the formation of tin oxide. Oxygen remains homogeneously dissolved in the tin as long as the corresponding limit amount is not exceeded. The solubility of oxygen is strongly dependent on temperature, and clearly in a relationship with image 3 The corresponding phase diagram follows log[pO 2 ]=f(T) to represent.

[0028] From image 3 (curve 20), it can be seen that at typical metal bath temperatures above 600 °C, the presence of oxygen-containing liquid tin ranges from less than 10 -24 bar(600℃) and less than 10 -11 The partial pressure of oxygen in bar (1200°C) is defined. oxygen partial pressure pO 2 Indicates the binding force of liquid tin to dissolved oxygen. The binding force can vary over several orders of magnitude. Reference can be made to the formula in the book "Metallurgische Elektrochemmie (Metallurgy Electrochemistry)" published in Duesseldorf in 1975...

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Abstract

The invention discloses a method of manufacturing float glass in which molten glass (2) floating on molten metal (1) between the hot and cold ends of a molten metal bath (10) is formed into a flat glass , and affect the oxygen concentration of the molten metal. In order to achieve a high glass quality, the oxygen concentration of the molten metal ( 1 ) is influenced during glass production in such a way that it does not exceed the saturation solubility of the cold end at any place.

Description

technical field [0001] The present invention relates to a method of making float glass in which molten glass floating on molten metal between the hot and cold ends of a molten metal bath is formed into a sheet glass and the oxygen concentration of the molten metal is affected. Background technique [0002] This method is given in US patent specification US6094942. In this known method, hydrogen gas is directed to a bath of molten tin to react with gaseous oxygen or tin oxide in molten tin to form water and elemental tin, thereby reducing the amount of tin oxide in the molten tin . However, it is not easy to eliminate as much as possible the negative effects of oxygen on glass manufacturing and its quality. [0003] In the manufacture of flat glass by the float process, the viscosity is about 10 4 The molten glass of dPa s flows into a metal pool, especially a pool of molten tin or tin alloy, is molded to a certain thickness on the liquid tin, and is cooled on the liquid t...

Claims

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Application Information

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IPC IPC(8): C03B18/18C03B18/20
CPCC03B18/18C03B18/20
Inventor 托马斯·法伊弗格哈德·劳滕施拉格安德烈亚斯·罗特斯克劳斯·施奈德格诺特·罗思拉尔夫-迪特尔·沃纳
Owner 舱壁玻璃公司
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