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Online chemical tempering method of aluminosilicate glass

A technology of aluminosilicate glass and chemical tempering, which is applied in glass tempering, glass production, glass manufacturing equipment, etc., can solve problems such as difficulty in achieving scale, low-cost preparation, restriction of industrial development, and low preparation efficiency, and achieve The effect of reducing the threshold of technology application and technology development risk, realizing large-scale production and improving production efficiency

Inactive Publication Date: 2012-07-04
(CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This chemical tempering process has low preparation efficiency and high production cost, making it difficult to achieve large-scale and low-cost preparation, which limits the development of the industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The mass percentage of the chemical composition is SiO 2 69% 、 Al 2 o 3 12%, MgO 4%, K 2 O 3%, Na 2 O 8%, CaO 2% melted aluminosilicate glass substrate enters the annealing kiln A zone (pre-annealing zone) through the roller table for pre-annealing, the outlet temperature of the annealing kiln A zone is controlled at 600 ° C; after annealing The glass substrate in area A of the kiln enters the chemical tempering box (that is, the online chemical tempering area). The length of the box is 5m. The temperature inside the box is controlled at 590-600°C by a thermocouple. The ratio is 1:1 KCl and KNO 3Mix the solution, keep warm in the tempering box for 1 to 3 minutes, and then enter the annealing kiln B area (annealing area) to complete the on-line chemical tempering during the annealing process of the glass substrate; after the on-line chemical tempering, the various performance indicators of the glass substrate have reached a higher level. levels, as shown in the tab...

Embodiment 2

[0036] The mass percentage of the chemical composition is SiO 2 54.4%, Al 2 o 3 21.3%, MgO 3.3%, K 2 O 1.5%, Na 2 O 11.7%, Li 2 O 0.1%, CaO 0.3%, B 2 o 3 The aluminosilicate glass substrate after 6.8% melting and molding enters the annealing kiln A area (pre-annealing area) through the roller table for pre-annealing, and the outlet temperature of the annealing kiln A area is controlled at 550 ° C; The substrate enters the chemical tempering box (that is, the online chemical tempering area), the length of the box is 20m, the temperature inside the box is controlled at 500-550°C by thermocouples, and the mass concentration ratio of spraying and atomizing at the entrance of the box is 2:1 the K 2 SO 4 and KNO 3 Mix the solution, then keep it warm in the tempering box for 4-8 minutes, and then enter the annealing kiln B area (ie, the annealing area) to complete the on-line chemical tempering of the glass substrate during the annealing process; the various performance...

Embodiment 3

[0039] The mass percentage of the chemical composition is SiO 2 70% 、Al 2 o 3 10%, MgO 4%, K 2 O 3%, Na 2 The aluminosilicate glass substrate melted and formed with O 8% and CaO 3% enters zone A of the annealing kiln (that is, the pre-annealing zone) through the roller table for pre-annealing, and the outlet temperature of the zone A of the annealing kiln is controlled at 630°C; The glass substrate in area A of the kiln enters the chemical tempering box (that is, the on-line chemical tempering area). The length of the box is 20m. The temperature inside the box is controlled at 600-630°C by a thermocouple. KCl and KNO in a ratio of 4:1 3 Mix the solution, keep warm in the tempering box for 6-10 minutes, and then enter the annealing kiln B area (ie, the annealing area) to complete the on-line chemical tempering of the glass substrate during the annealing process; the various performance indicators of the glass substrate after the on-line chemical tempering have reached a h...

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Abstract

The invention discloses an online chemical tempering method of aluminosilicate glass. An online chemical tempering region which is hermetically connected with a pre-annealing region and an annealing region is additionally arranged between the pre-annealing region and the annealing region, and the online chemical tempering temperature is not more than the outlet temperature of the pre-annealing region. The online chemical tempering method comprises the following steps: enabling a glass substrate which is formed by melting to enter into the online chemical tempering region for performing surface spray-coating of a tempering solution after passing through the pre-annealing region, so as to form a pressure stress layer on the glass substrate, and then enabling the glass substrate to enter into the annealing region for completing online chemical tempering during the annealing process of the glass substrate. According to the online chemical tempering method disclosed by the invention, the online chemical tempering can be directly completed during the annealing process of a glass production line, the production efficiency of products can be greatly improved, the manufacturing cost can be reduced and large-scale benefits can be further realized; and furthermore, the online chemical tempering method disclosed by the invention can be directly applied to the existing glass production line without performing large-scale technical transformation, so that the technical application threshold and technical development risk can be further reduced.

Description

[0001] technical field [0002] The invention relates to the field of tempered glass manufacturing, more specifically to an online chemical tempering method for aluminosilicate glass. Background technique [0003] The existing chemical tempering process adopts off-line tempering, which is to put the prepared glass substrate into the chemical tempering furnace equipped with molten salt, and after soaking for several hours, the ions with smaller radius in the glass surface and the radius of the molten salt Larger ion exchange uses the difference in volume of alkali ions to form embedded extrusion stress on the surface of the glass, thereby greatly improving the impact resistance, wear resistance and safety of the glass. This chemical tempering process has low preparation efficiency and high production cost, making it difficult to achieve large-scale and low-cost preparation, which limits the development of the industry. Contents of the invention [0004] In view of the defi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B27/02
CPCY02P40/57
Inventor 彭寿曹欣马立云王芸石丽芬崔介东
Owner (CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD
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