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Preparation method of quartz ceramic hollow roll bar for toughened glass heating furnace

A technology of quartz ceramics and tempered glass, applied in the field of quartz ceramics, can solve the problems of inconvenient installation and replacement operations, large heat conduction, heat loss, etc., and achieve the effects of saving manpower and resources, uniform organizational structure, and reduced cross-sectional area.

Inactive Publication Date: 2017-03-15
洛阳索莱特材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the solid roller can meet the conditions of use in the glass tempering furnace, there are still many shortcomings, such as the weight of the solid roller is too heavy, and the installation and replacement operations are not very convenient
In particular, the heat conduction of solid rollers is larger than that of hollow rods, which causes a certain amount of heat loss and also has a certain impact on the uniformity of furnace temperature.
In addition, the plaster mold grouting molding process is used to make quartz ceramic rollers. The grouting time only takes more than 30 hours, the molding efficiency is very low, and the external dimensions are not very accurate. There is a fine powder layer on the surface and the internal deconstruction is not very uniform; The service life of the mold is only 15 to 20 times, making plaster molds requires a lot of manpower and gypsum raw materials

Method used

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preparation example Construction

[0029] The preparation method of the quartz ceramic hollow roller for tempered glass heating furnace according to the present invention adopts the preparation method of gel injection molding, and the method specifically includes the following steps:

[0030] a. Select raw materials:

[0031] The raw material adopts chemical purity SiO 2 ≥99% fused silica, the fused silica is calculated as:

[0032] Particle size: 1~0.5mm — 40~50%

[0033] Particle size: 0.3~0.1mm — 20~30%

[0034] Particle size: <0.01mm — 20~30%

[0035] b. Abrasives: Put the 1-0.5mm granular material into the ball mill together with pure water and water reducing agent for 20-40 hours of wet grinding; the amount of water added in the abrasive step is 18-25% of the weight of the granular material; The water reducer is an organic acid, and the organic acid includes any one or a combination of any two of oxalic acid, lactic acid, and citric acid, and the amount of the water reducer is 0.5 to 1% of the weight ...

Embodiment 1

[0041] A method for preparing a quartz ceramic hollow roller for a tempered glass heating furnace, the method for preparing a gel injection molding method specifically includes the following steps:

[0042] a) Raw material and particle gradation

[0043] The raw material adopts chemical purity SiO 2 ≥99% fused silica, the fused silica is calculated as:

[0044] 1~0.5mm — 40%

[0045] 0.3~0.1mm — 30%

[0046] <0.01mm — 30%

[0047] b) Abrasives: Add 1-0.5mm granular materials with pure water and water reducing agent into the ball mill for wet grinding for 20 hours and then discharge the materials. 0.5%. The water reducer is a mixture of oxalic acid and lactic acid.

[0048] c) Preparation of colloidal slurry: Put the wet-milled slurry, organic colloid, catalyst, surfactant together with 0.3-0.1mm and <0.01mm fused silica into a mixer and stir evenly to make a colloidal slurry. The organic colloid is a composite colloid of water-based methacrylamide and methylenebisacryla...

Embodiment 2

[0053] A method for preparing a quartz ceramic hollow roller for a tempered glass heating furnace, the method for preparing a gel injection molding method specifically includes the following steps:

[0054] a) Raw material and particle gradation

[0055] The raw material adopts chemical purity SiO 2≥99% fused silica, the fused silica is calculated as:

[0056] 1~0.5mm — 50%

[0057] 0.3~0.1mm — 20%

[0058] <0.01mm — 30%

[0059] b) Abrasive: Put 1-0.5mm granular material together with pure water and water reducing agent into the ball mill for wet grinding for 40 hours and then discharge. The amount of water added is 25% of the weight of the pellets, and the amount of water reducing agent added is 1% of the weight of the pellets. The water reducer is a mixture of lactic acid and citric acid.

[0060] c) Preparation of colloidal slurry: put the wet-milled slurry, organic colloid, catalyst, surfactant, and fused silica with a particle size of 0.3-0.1mm and <0.01mm into a m...

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Abstract

A preparation method of a quartz ceramic hollow roll bar for toughened glass heating furnace relates to the technical field of quartz ceramic. A fused quartz raw material with the chemical purity that SiO2 is more than or equal to 99 percent is adopted; based on the mass percentage of granules and gradation, the fused quartz comprises 40 to 50 percent of quartz with granularity of 1 to 0.5 mm, 20 to 30 percent of quartz with granularity of 0.3 to 0.1 mm and 20 to 30 percent of quartz with granularity of less than 0.01 mm; and the quartz ceramic hollow roll bar is obtained by the steps of grinding materials, preparing colloid slurry, forming, drying and sintering. According to the preparation method, a gel casting process is adopted, so the aims of short forming time, accurate and consistent overall dimensions, smooth surface and uniform internal structure are fulfilled, the weight of the prepared quartz ceramic hollow roll bar is reduced by 20 to 30 percent compared with that of a quartz ceramic roll bar, the energy is saved and uniform furnace temperature is guaranteed.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of quartz ceramics, in particular to a method for preparing a quartz ceramic hollow roller for a tempered glass heating furnace. [0003] 【Background technique】 [0004] It is known that quartz ceramic rollers are mainly used in glass high-temperature transmission mechanisms of glass tempering furnaces. The main advantages of using quartz ceramic rollers are: 1. Low thermal conductivity, small heat loss, and high uniformity of furnace temperature; 2. , The hardness is close to that of glass and will not scratch the glass; 3. The material is light and rigid, which can ensure the flatness of the glass. Therefore, quartz ceramic rollers are widely used in tempered glass furnaces. However, the currently used quartz ceramic rollers are all solid rollers. Although the solid roller can meet the service conditions of the glass tempering furnace, there are many shortcomings, such as the weight of the solid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/622
CPCC04B35/14C04B35/622C04B2235/6023
Inventor 张拯
Owner 洛阳索莱特材料科技有限公司
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