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Molten salt impurity removal method suitable for chemical tempering production and method for improving glass strength

A technology of chemical tempering and molten salt, which is applied in the purification of alkali metal nitrate, etc., and can solve problems such as unsatisfactory results

Active Publication Date: 2020-05-05
VITALNK IND SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to address the unsatisfactory effect of the traditional molten salt impurity removal method, and provide a molten salt impurity removal method suitable for chemical tempering production and a method for improving glass strength that can effectively remove impurity ions in molten salt

Method used

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  • Molten salt impurity removal method suitable for chemical tempering production and method for improving glass strength

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A method for improving the strength of glass by chemical tempering, comprising the following steps:

[0047] Step 1) Use a stress tester to measure and record the stress value of each batch of tempered glass, if it is less than 770MPa, stop the tempering operation.

[0048] Step 2) adding 0.5% KOH to the mass percentage of the molten salt to adjust the pH value of the molten salt to 9.

[0049] Step 3) adding 0.5% potassium carbonate and 0.5% potassium phosphate accounting for the mass percentage of the molten salt, and fully stirring at the same time.

[0050] Step 4) adding 0.5% potassium pyroantimonate solution accounting for the mass percentage of the molten salt, and fully stirring at the same time.

[0051] Step 5) adding 1% silicic acid to the mass percentage of the molten salt to adjust the pH value of the molten salt to 7.

[0052] Step 6) Adding 0.5% aluminum oxide based on the mass percentage of the molten salt.

[0053] Step 7) Clarify for 4h.

[0054] S...

Embodiment 2

[0056] A method for improving the strength of glass by chemical tempering, comprising the following steps:

[0057] Step 1) Use a stress tester to measure and record the stress value of each furnace of tempered glass, if it is less than 770MPa, stop the tempering operation.

[0058] Step 2) adding 0.1% KOH to the mass percentage of the molten salt to adjust the pH value of the molten salt to 9.

[0059] Step 3) adding 0.5% potassium carbonate and 0.5% potassium phosphate accounting for the mass percentage of the molten salt, and fully stirring at the same time.

[0060] Step 4) adding 0.5% potassium pyroantimonate to the mass percentage of the molten salt, and fully stirring at the same time.

[0061] Step 5) adding 2% silicic acid to the mass percentage of the molten salt to adjust the pH value of the molten salt to 7.

[0062] Step 6) Adding 0.5% aluminum oxide based on the mass percentage of the molten salt.

[0063] Step 7) Clarify for 4h.

[0064] Step 8) Tempering op...

Embodiment 3

[0066] A method for improving the strength of glass by chemical tempering, comprising the following steps:

[0067] Step 1) Use a stress tester to measure and record the stress value of each batch of tempered glass, if it is less than 770MPa, stop the tempering operation.

[0068] Step 2) adding 0.5% KOH to the mass percentage of the molten salt to adjust the pH value of the molten salt to 13.

[0069] Step 3) adding 1% potassium carbonate and 1% potassium phosphate accounting for the mass percentage of the molten salt, while fully stirring.

[0070] Step 4) adding 0.5% potassium pyroantimonate to the mass percentage of the molten salt, and fully stirring at the same time.

[0071] Step 5) adding 1% silicic acid to the mass percentage of the molten salt to adjust the pH value of the molten salt to 7.

[0072] Step 6) Adding 0.5% aluminum oxide based on the mass percentage of the molten salt.

[0073] Step 7) Clarify for 4h.

[0074] Step 8) Tempering operation, using a str...

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Abstract

The invention relates to a molten salt impurity removal method suitable for chemical tempering production and a method for improving glass strength. The molten salt impurity removal method suitable for chemical tempering production comprises the following steps: adjusting the pH value of molten salt to 9-14; adding a precipitant into the molten salt, performing mixing treatment to enable the precipitant to react with impurity ions in the molten salt to generate precipitate, and adjusting the pH value of the molten salt to 6.8-7.2; and adding an adsorbent, and standing to clarify the molten salt. The molten salt impurity removal method for chemical tempering production is simple to operate, and experiments prove that the effect of removing impurities from molten salt by adopting the methodis obviously better than that of a traditional molten salt impurity removal method.

Description

technical field [0001] The invention relates to the technical field of chemical tempered glass processing, in particular to a molten salt removal method suitable for chemical tempering production and a method for improving glass strength. Background technique [0002] In glass processing and production, chemical tempering is usually used to improve the strength of glass products. The principle is to soak the glass products that need to be tempered in high-temperature potassium nitrate molten salt, and the potassium ions in the potassium nitrate molten salt are replaced with the sodium ions in the glass. reaction, since the diameter of potassium ions is larger than that of sodium ions, compressive stress is formed on the surface of the glass to achieve the purpose of improving the strength of glass products. [0003] The study found that when the concentration of potassium nitrate in the molten salt is higher, the chemical toughening effect is better, and the stress value of ...

Claims

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Application Information

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IPC IPC(8): C03C21/00C01D9/16
CPCC03C21/002C01D9/16Y02P40/57
Inventor 王伟王世军陈建章彭晓林丁雄风
Owner VITALNK IND SHENZHEN
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