Technique for producing calcium oxide E glass

A production process, quicklime technology, applied in the field of E-glass production process, to achieve the effect of reducing air pollution, reducing pollution and reducing burden

Inactive Publication Date: 2008-05-28
TAISHAN FIBERGLASS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the existing E-glass production methods, the present invention provides a production process for producing E-glass using quicklime...

Method used

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Effect test

specific Embodiment approach 1(12-1-1

[0012] The ingredients in parts by weight include: silicon dioxide 53.8, aluminum oxide 13.75, boron trioxide 7.30, calcium oxide 20.77, magnesium oxide 2.02, iron oxide 0.40, titanium oxide 0.42, fluorine 0.80, sodium oxide + potassium oxide 0.65 . The calcium oxide is all introduced by limestone; the fluorine element is introduced by fluorite whose weight ratio of fluorine component is 0.2%.

specific Embodiment approach 2(12-1-2

[0014] The ingredients in parts by weight include silicon dioxide 54.1, aluminum oxide 13.7, boron trioxide 7.0, calcium oxide 20.75, magnesium oxide 2.18, iron oxide 0.40, titanium oxide 0.42, fluorine 0.75, sodium oxide + potassium oxide 0.62 . Calcium oxide is introduced with 80% limestone and 20% calcined material outside the kiln. The calcined product is obtained by calcining limestone outside the kiln at 1000-1050°C for 24 hours; the fluorine element is introduced by fluorite with a weight ratio of 0.5% of the fluorine component.

specific Embodiment approach 3(12-1-3

[0016] The ingredients in parts by weight include silicon dioxide 54.2, aluminum oxide 13.6, boron oxide 7.0, calcium oxide 20.95, magnesium oxide 2.15, iron oxide 0.40, titanium oxide 0.38, fluorine 0.65, sodium oxide + potassium oxide 0.60 . Calcium oxide is introduced with 50% limestone and 50% calcined material outside the kiln. The calcined product is obtained by calcining limestone outside the kiln at 950-1000°C for 25 hours; the fluorine element is introduced by fluorite with a weight ratio of 0.4% of the fluorine component.

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Abstract

The invention relates to the production of E glass and provides a production technique to produce E glass with quicklime instead of limestone. The specific method of the invention is that: the limestone is sintered outside the kiln at a temperature about 950-1050 DEG C for 20-25h and the preferential sintering temperature is 1000-1020 DEG C for 24-25h; then the object obtained from the sintering is put into the kiln according to prescription ratio. The technique of the invention greatly improves the quality of the E glass and reduces production cost, and energy consumption can be greatly reduced compared with directly applying limestone; the discharge of CO2 generated from most of raw materials is controlled, thereby reducing environmental pollution.

Description

technical field [0001] The invention relates to a production process of E glass, in particular to a production process of using quicklime instead of limestone to produce E glass. Background technique [0002] E glass is aluminum, boron, silicate glass with alkali metal oxide content less than 1%. In the production process of traditional E glass, limestone is one of the main raw materials, which can provide 60% to 80% of the CaO requirement in glass. Therefore, in the prior art, limestone is usually used to introduce CaO, the main component of glass, but due to the reaction in the kiln, limestone will release a large amount of carbon dioxide. After the reaction, the amount of bubbles in the glass liquid is relatively high, and the thickness reaches 3-4cm. The quality of the post-processed glass is poor and easy to break, and the amount of air bubbles in the finished glass is as high as 40-60 per ounce; due to the increase of air bubbles, the thickness of the foam layer is gr...

Claims

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Application Information

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IPC IPC(8): C03C6/08C03C3/118
Inventor 张志法刘颖李永艳张德刚殷善坤张国
Owner TAISHAN FIBERGLASS INC
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