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Insulated nosepiece

A technology of gap and heat insulation layer, applied in the direction of manufacturing tools, glass furnace equipment, glass manufacturing equipment, etc., can solve the problem that the upper structure is unbalanced, debris falls, and the crack resistance of basic gap bricks is not enough to meet the requirements of glass furnaces, etc. question

Active Publication Date: 2021-01-15
SAINT GOBAIN CENT DE RES & DEVS & DETUD EUROEN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017]However, the resistance to cracking of foundation gap bricks is sometimes insufficient to meet the current changing needs of glass furnaces, which require longer furnace life
In particular, cracking of foundation gap bricks can lead to fractures that allow shards to fall into the bath of molten glass, thereby creating flaws in the glass
In addition, foundation gap bricks thus no longer properly protect metal structures and tanks
It may also be found that the rest of the superstructure is no longer in balance

Method used

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Examples

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Embodiment Construction

[0097] The thermal insulation gap brick according to the present invention comprises a basic gap brick 20 and a thermal insulation layer 40 .

[0098] foundation gap brick

[0099] because figure 1 has been described previously, so now refer to the Figure 2a , Figure 2a Also partially described above.

[0100] The shape of the base gap brick 20 may be a shape known for conventional gap bricks.

[0101] The length L of the foundation gap brick 20 20 Preferably greater than 10 cm and preferably less than 100 cm. The width of the foundation gap brick 20 l 20 Preferably greater than 30cm and / or less than 100cm, the height h of the foundation gap brick 20 20 Preferably greater than 10 cm and / or less than 50 cm.

[0102] In cross-section, i.e. perpendicular to the length L 20 Direction of the cross-section, on the upper surface 20 5 with lower surface 20 3 The line extending in the middle is called "axis X". The thickness of the foundation gap brick e 20 is the shor...

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Abstract

The invention relates to an insulated nosepiece comprising: - a basic nosepiece (20); - an insulating layer (40) having a thermal conductivity of less than 2.0 W.m-1.K-1 between 20 DEG C and 500 DEG C, that is rigid enough to be self-supporting and covers an insulated surface of the basic nosepiece, said insulated surface being part of the lower surface (203) of said basic nosepiece, extending inthe lower transition surface (2014-12), and making up more than 20% of the lower transition surface (2014-12), said insulating layer having a chemical composition, in weight percent on the oxide basis, such that Al2O3 + SiO2 + ZrO2 + CaO + Na2O + MgO + K2O + TiO2 + Fe2O3 + HfO2 + P2O5 + Y2O3 > 80%.

Description

technical field [0001] The present invention relates to insulating gap bricks for glass melting furnaces and to glass melting furnaces comprising such insulating gap bricks. Background technique [0002] Many glass products are manufactured by melting and refining vitrifiable mixtures of raw materials containing compounds such as oxides, carbonates, sulfates, and nitrates. These two steps take place in furnaces, the key building blocks of which are refractory products, which are able to withstand the thermal and mechanical stresses these furnaces are subjected to, especially high temperatures. Therefore, glass melting furnaces usually include many refractory products, which are arranged in different positions according to their characteristics. For each part of the furnace, the selected product is one that does not cause defects that would render the glass unusable (as this would reduce productivity) and that is durable enough to allow a satisfactory lifetime for the furnac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B5/42
CPCC03B5/42C03B5/43
Inventor 伊莎贝拉·卡波迪皮埃尔里克·维斯帕F·M·L·维莱莫C·希斯
Owner SAINT GOBAIN CENT DE RES & DEVS & DETUD EUROEN