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CN-121974556-A - Quenching strengthening treatment process for high-boron silicon fireproof glass

CN121974556ACN 121974556 ACN121974556 ACN 121974556ACN-121974556-A

Abstract

S1, weighing nano alumina, nano zirconia, boron oxide and sodium oxide according to a proportion, ball milling, mixing with silicon dioxide, boron oxide, sodium oxide and aluminum oxide according to a proportion, putting into a V-shaped mixer, melting and casting to obtain the high borosilicate glass substrate. S2, heating and preserving heat of the glass substrate in a preheating zone of the heating furnace, and then transferring the glass substrate to a high-temperature zone for heating and preserving heat. S3, spraying air and deionized water aerosol on the surface of the glass, and then moving to the air grid area to spray air at high wind pressure and low wind pressure to finish quenching reinforcement. S4, immersing the glass in potassium nitrate molten salt liquid in an ion exchange furnace. S5, taking out the glass, cooling, flushing with hot water, draining, and drying in a hot air drying oven to obtain a finished product. The quenching strengthening treatment process of the high-boron-silicon fireproof glass can optimize the microstructure of the high-boron-silicon fireproof glass, enhance the shock resistance and the fireproof performance of the high-boron-silicon fireproof glass and improve the product quality.

Inventors

  • TU QINGPING
  • Gong Shenghuo

Assignees

  • 陕西智诚卓越玻璃有限公司

Dates

Publication Date
20260505
Application Date
20260409

Claims (8)

  1. 1. A quenching strengthening treatment process of high-boron silicon fireproof glass comprises the following steps: The preparation method comprises the steps of S1, preparing a high borosilicate glass substrate, namely (1) weighing 0.5-1.5 parts by weight of nano alumina, 0.5-1.5 parts by weight of nano zirconia, 0.6-1.2 parts by weight of boron oxide and 0.4-0.6 parts by weight of sodium oxide, mixing and then placing into a ball mill for ball milling to obtain a mixture A, (2) placing the mixture A, 78-82 parts by weight of silicon dioxide, 11-13 parts by weight of boron oxide, 4-5 parts by weight of sodium oxide and 2.5-3.5 parts by weight of aluminum oxide into a V-shaped mixer for mixing to obtain a mixture B, (3) placing the mixture B into a high-temperature melting furnace, melting to obtain a melt, and (4) casting the melt into a stainless steel mold, and naturally cooling to room temperature to obtain the high borosilicate glass substrate; s2, gradient heating treatment, namely (1) placing a high borosilicate glass substrate in a preheating zone of a continuous heating furnace, heating to 400 ℃ from room temperature at a speed of 10 ℃ per minute, and preserving heat for 30 minutes, (2) transferring from the preheating zone to a high-temperature zone, adjusting the heating rate to 5 ℃ per minute, heating to 550 ℃ and preserving heat for 40 minutes, (3) continuously adjusting the heating rate to 10 ℃ per minute, heating to 850 ℃ and preserving heat for 60 minutes to obtain pretreated glass; S3, multistage quenching treatment, namely (1) transferring pretreated glass from a high-temperature area of a continuous heating furnace to an aerosol mixing area of a quenching device, spraying an aerosol mixing medium formed by ultrasonic atomization of air and deionized water onto the surface of the pretreated glass, wherein the air pressure is 100-120 kPa, and the spraying time is 3-5 seconds, so as to obtain first quenched glass, (2) transferring the first quenched glass from the aerosol mixing area of the quenching device to an air grid area, spraying air onto the surface of the first quenched glass, wherein the air pressure is 70-80 kPa, and the spraying time is 8-10 seconds, so as to obtain second quenched glass, (3) reducing the air pressure to 40-50 kPa, and continuously spraying air onto the surface of the second quenched glass for 10 seconds, so as to complete multistage quenching strengthening of the borosilicate glass; s4, performing ion exchange treatment, namely (1) putting potassium nitrate powder with the particle size of 0.5-1 mm into an ion exchange furnace, heating to 380-420 ℃ to obtain potassium nitrate molten salt solution, and (2) completely immersing the multi-stage quenched and reinforced high borosilicate glass into the potassium nitrate molten salt solution, and soaking for 2-4 hours to obtain ion exchange glass; S5, cleaning and drying, namely taking out the ion exchange glass, moving the ion exchange glass to a room temperature environment, cooling the ion exchange glass to below 50 ℃, continuously flushing the surface of the ion exchange glass with 60 ℃ hot water for 10 minutes, draining off surface free water, and then placing the ion exchange glass into a hot air drying box for drying for 20 minutes to obtain the high-boron silicon fireproof glass subjected to quenching strengthening treatment.
  2. 2. The quenching strengthening treatment process of high-boron silicon fireproof glass according to claim 1, wherein the particle size of the nano aluminum oxide is 50-100 nm, and the particle size of the nano zirconium oxide is 80-150 nm.
  3. 3. The quenching strengthening treatment process of high-boron silicon fireproof glass according to claim 1, wherein the rotating speed of a ball mill in S1 is 200r/min, the ball milling time is 30 minutes, the rotating speed of a V-shaped mixer is 20r/min, and the mixing time is 60 minutes.
  4. 4. The quenching strengthening treatment process of high-boron silicon fireproof glass according to claim 1, wherein the high-temperature melting furnace temperature in S1 is 1550-1650 ℃, the melting time is 6-8 hours, and the stirring rate of 50r/min is maintained in the melting process.
  5. 5. The rapid hardening treatment process for high boron silicon fire-resistant glass according to claim 1, wherein the thickness of the high boron silicon glass substrate in S1 is 6mm.
  6. 6. The rapid cooling strengthening treatment process of high-boron silicon fireproof glass according to claim 1, wherein the volume ratio of air to deionized water in the aerosol mixed medium in the step S3 is 5:1.
  7. 7. The quenching strengthening treatment process of high-boron silicon fireproof glass according to claim 1, wherein the mass ratio of the potassium nitrate molten salt solution to the high-boron silicon glass in S4 is 6-10:1.
  8. 8. The quenching strengthening treatment process of high-boron silicon fireproof glass according to claim 1, wherein the temperature of the hot air drying oven in the step S5 is 70 ℃ and the wind speed is 5m/S.

Description

Quenching strengthening treatment process for high-boron silicon fireproof glass Technical Field The invention relates to the technical field of glass manufacturing, in particular to a quenching strengthening treatment process of high-boron silicon fireproof glass. Background The high boron silicon fireproof glass has the main components of silicon dioxide and boron oxide, has low thermal expansion coefficient, good light transmittance, thermal stability and high fire resistance limit, and can be used as a core material in important fields such as high-end building curtain walls, fireproof partitions, safety channels and the like. The fire-proof performance of high boron silicon fire-proof glass depends on the high softening point of the glass, and on the other hand, the mechanical strength of the glass needs to be improved through strengthening treatment so as to bear thermal shock and mechanical impact in emergency situations such as fire. At present, quenching strengthening is one of the most main strengthening treatment processes of high borosilicate glass, and the process generally adopts high-pressure air to rapidly cool the glass on both sides after the glass is heated to be close to a softening point, so that the surface is firstly shrunk and solidified, and compressive stress is formed on the surface when the interior is cooled and shrunk, thereby increasing the mechanical strength of the glass. However, because the high borosilicate glass has poor heat conductivity, huge internal and external temperature gradient is easy to form in the rapid heating and cooling process, the risk of explosion in the production process is high, and the yield is difficult to guarantee. And the traditional quenching strengthening treatment process lacks optimization means for the microstructure of the glass, and can not effectively fill microcracks in the glass, so that the high borosilicate glass has limited improvement of impact resistance. Therefore, the application provides a quenching strengthening treatment process for high-boron-silicon fireproof glass, which aims to solve the problems of cracking, high process energy consumption and the like caused by uneven stress and insufficient strength of the high-boron-silicon fireproof glass and large temperature difference between the surface and the inside of the high-boron-silicon fireproof glass in the quenching strengthening treatment process, optimize the microstructure of the high-boron-silicon fireproof glass, enhance the shock resistance of the high-boron-silicon fireproof glass, reduce the cracking risk in the production process and improve the stability of the product quality. Disclosure of Invention The invention aims to provide a quenching strengthening treatment process for high-boron-silicon fireproof glass, which aims to solve the problems of uneven stress, insufficient strength, cracking caused by large temperature difference between the surface and the inside of the high-boron-silicon fireproof glass in the quenching strengthening treatment process, high process energy consumption and the like. In order to achieve the above purpose, the invention provides a quenching strengthening treatment process of high boron silicon fireproof glass, which comprises the following steps: S1, preparing a high borosilicate glass substrate, namely (1) weighing 0.5-1.5 parts by weight of nano alumina, 0.5-1.5 parts by weight of nano zirconia, 0.6-1.2 parts by weight of boron oxide and 0.4-0.6 parts by weight of sodium oxide, mixing, putting into a ball mill, ball milling to obtain a mixture A, (2) putting the mixture A, 78-82 parts by weight of silicon dioxide, 11-13 parts by weight of boron oxide, 4-5 parts by weight of sodium oxide and 2.5-3.5 parts by weight of alumina into a V-shaped mixer, mixing to obtain a mixture B, (3) putting the mixture B into a high-temperature melting furnace, melting to obtain a melt, casting the melt into a stainless steel mold, and naturally cooling to room temperature to obtain the high borosilicate glass substrate. S2, gradient heating treatment, namely (1) placing the high borosilicate glass substrate in a preheating zone of a continuous heating furnace, heating to 400 ℃ from room temperature at a speed of 10 ℃ per minute, and preserving heat for 30 minutes, (2) transferring the high borosilicate glass substrate from the preheating zone to a high temperature zone, adjusting the heating speed to 5 ℃ per minute, heating to 550 ℃ and preserving heat for 40 minutes, and (3) continuously adjusting the heating speed to 10 ℃ per minute, heating to 850 ℃ and preserving heat for 60 minutes to obtain pretreated glass. S3, multistage quenching treatment, namely (1) transferring the pretreated glass from a high-temperature area of a continuous heating furnace to an aerosol mixing area of a quenching device, spraying an aerosol mixing medium formed by ultrasonic atomization of air and deionized water onto the surface of the pretreated glass, wherei