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Refractory product having a high content of zirconia

A technology for refractory products and casting refractory products, which is applied in the direction of manufacturing tools, glass manufacturing equipment, glass furnace equipment, etc., and can solve the problems of high cost and limited use

Pending Publication Date: 2021-09-28
SAINT GOBAIN CENT DE RES & DEVS & DETUD EUROEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, their high cost and their characteristics may limit their use, which is mainly concentrated on the blocks that are in contact with the glass, especially in the areas of greatest stress of the slots

Method used

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  • Refractory product having a high content of zirconia
  • Refractory product having a high content of zirconia
  • Refractory product having a high content of zirconia

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0076] -SiO 2 : 8.5% to 10.8%

[0077] -B 2 o 3 : 0.30% to 0.70%

[0078] -Al 2 o 3 : 1.0% to 1.8%

[0079] Na 2 O content and K 2 At least one of the O contents is greater than 0.30%, preferably greater than 0.35%, preferably greater than 0.40%.

[0080] Yttrium oxide Y should be limited 2 o 3 weight content to maintain good viability.

[0081] According to the present invention, Fe 2 o 3 +TiO 2 The weight content of is less than 0.50%, preferably less than 0.30%. Preferably, P 2 o 5 The weight content is less than 0.05%. In particular, these oxides are harmful and their content should be limited to traces introduced as impurities with the raw materials.

[0082] "Other species" are oxide species not listed above, i.e. other than ZrO 2 、Hf 2 O, SiO 2 , Y 2 o 3 , B 2 o 3 、Al 2 o 3 、Na 2 O, K 2 O, TiO 2 and Fe 2 o 3 substance. In one embodiment, "other substances" are limited to substances whose presence is not particularly desirable and which a...

Embodiment 1

[0121] Example 1 and Example 2 correspond to conventional AZS articles and conventional products with high zirconia content, respectively.

[0122] The balance corresponds to ZrO 2 +HfO 2 content and impurities (the content of impurities in these examples is always less than 0.5%).

[0123] [Table 1]

[0124] 1* 2* 3 4 SiO 2

[0125] *Except for this invention

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Abstract

The present invention relates to a molten and cast refractory product comprising, in weight percent on the basis of oxides, and for a total of 100%: ZrO2: balance to 100%, Hf2O: < 5%, SiO2: 8.1% to 12.0%, B2O3: 0.20% to 0.90%, Na2O + K2O: 0.40% to 0.80%, Al2O3: 0.3% to 2.0%, Y2O3: < 2.0%, Fe2O3 + TiO2: < 0.6%, and other species: < 1.5%.

Description

technical field [0001] The present invention relates to a fused refractory product having a high zirconia content and a glass melting furnace comprising such a product. Background technique [0002] Glass melting furnaces usually include an extremely large number of refractory products, which are placed in different positions according to their characteristics. For each part of the furnace, the article selected will be one that will not cause defects that would render the glass unusable (which would reduce yield), and that will last long enough to allow a satisfactory service life for the furnace. [0003] figure 1 A half section of the glass melting furnace 10 is schematically shown. Particularly discernible are the groove 12 , the metal structure 14 and the superstructure 16 . [0004] Tank 12 for containing molten glass includes vertical side walls 22 and a bottom 24 . The side walls 22 generally consist of side channel pieces extending over the entire height of the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C03B5/43C04B35/484C04B35/657C09K21/00
CPCC04B2235/3206C04B2235/3208C04B2235/3215C04B2235/3213C04B2235/3248C04B2235/3418C04B2235/3409C04B2235/3201C04B2235/3217C04B2235/96C04B2235/9607C04B2235/3225C04B2235/3272C04B2235/447C04B2235/85C04B2235/3232C04B2235/65C04B2235/656C04B2235/6562C04B2235/6565C04B35/481C03B5/43C04B35/48C04B35/484C04B35/657C04B2235/727C04B2235/72
Inventor 伊莎贝拉·卡波迪皮埃尔里克·法比安·维斯帕
Owner SAINT GOBAIN CENT DE RES & DEVS & DETUD EUROEN