Method for environmentally friendly melting and refining a glass melt for an initial glass of a lithium-aluminium silicate (las) glass ceramic

A lithium-aluminosilicate, glass melt technology, applied in glass furnace equipment, glass manufacturing equipment, manufacturing tools, etc., can solve problems such as limited tank output, achieve less energy loss, low number of bubbles, and save capital investment Effect

Active Publication Date: 2010-09-08
SCHOTT AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, pure SnO is used at conventional refining temperatures 2 Disadvantages of refining also manifest as limited tank output

Method used

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  • Method for environmentally friendly melting and refining a glass melt for an initial glass of a lithium-aluminium silicate (las) glass ceramic
  • Method for environmentally friendly melting and refining a glass melt for an initial glass of a lithium-aluminium silicate (las) glass ceramic
  • Method for environmentally friendly melting and refining a glass melt for an initial glass of a lithium-aluminium silicate (las) glass ceramic

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Embodiment Construction

[0123] The invention is further illustrated by means of the following examples.

[0124] Table 1 shows the composition of the crystallizable glass for lithium aluminosilicate glass-ceramics of the present invention, in % by weight of oxides, and various compounds used as batch raw materials for the constituents. When calculating mixtures of raw materials, it should be taken into account that certain raw materials also contain a certain amount of impurities depending on the quality. Thus, for example, spodumene, depending on the quality of the commodity, contains different amounts of Li 2 O content, and also contains a certain amount of potassium, sodium and anorthite, and Fe 2 o 3 . This must be taken into account when calculating the batch formulation to obtain the desired LAS glass composition.

[0125] Glass No. 2 is a glass for comparison, which has the same composition except that it is refined using arsenic oxide instead of tin oxide. AS used as batch raw material ...

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Abstract

The method of environmentally friendly melting and refining a glass melt of a crystallizable glass, which is used for making a lithium aluminium silicate (LAS) glass ceramic, includes the steps of providing a glass batch with a main batch composition within a lithium aluminium silicate (LAS) glass system, in which tin oxide has been added as main refining agent, but which does not contain arsenic oxide and / or antimony oxide as refining agent, formulating a raw material mixture for the glass batch for restricting the proportion of quartz sand of raw material, which is used for introducing the glass component SiO2, and refining a glass melt formed from the glass batch at temperatures of at least 1600 DEG C.

Description

technical field [0001] The present invention relates to an environmentally friendly melting and refining process for glass melts of crystallizable glasses for lithium aluminosilicate (LAS) glass ceramics. Background technique [0002] When the glass is melted, a considerable amount of gas is generated as a result of the chemical conversion of the starting raw materials of the batch. In the case of conventional cost-effective batch mixtures, approximately 1.3 kg of batch raw material is required to produce approximately 1 kg of glass. This means that a considerable amount of gas contained in the batch, such as H 2 O, O 2 , CO 2 , SO 2 , NO x , N 2 and air, which are released during melting. The method step for removing air bubbles from the glass melt is called refining. [0003] When the batch material is introduced into the melting tank, a batch pile is formed on the glass melt, which extends to varying degrees into the melting tank, forming a so-called batch blanket...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C6/00C03C6/04C03C6/02C03B5/16
CPCC03C10/0045C03C10/0054C03C1/004C03C3/087
Inventor 克劳斯·舍恩贝格尔弗里德里希·西贝斯扬尼斯·科斯马斯马蒂亚斯·施图本劳赫霍斯特·布莱赖纳·贝斯特埃克哈特·德林乌多·雅各布
Owner SCHOTT AG
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