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Glass fiber drawing furnace and method for preparing glass fiber by using same

A glass fiber and wire drawing furnace technology, applied in glass manufacturing equipment, manufacturing tools, etc., can solve problems such as uneven temperature field, and achieve the effects of improving melting quality, improving stability, and uniform temperature field distribution

Active Publication Date: 2022-02-01
NANJING FIBERGLASS RES & DESIGN INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the glass fiber drawing furnace in the prior art that the temperature field is not uniform during fiber drawing, thereby providing a glass fiber drawing furnace and a method for preparing glass fibers using the glass fiber drawing furnace. method

Method used

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  • Glass fiber drawing furnace and method for preparing glass fiber by using same
  • Glass fiber drawing furnace and method for preparing glass fiber by using same
  • Glass fiber drawing furnace and method for preparing glass fiber by using same

Examples

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Embodiment 1

[0041] This embodiment provides a wire drawing furnace, such as Figure 1-3 As shown, the furnace body 1 is provided with a furnace 2 for accommodating molten glass, the top of the furnace body is provided with a ball adding hole 5 and a temperature measuring hole 6 , and the bottom of the furnace body is provided with a liquid flow hole 4 . The side wall, bottom brick and top brick of the furnace body in the present invention can all adopt existing brick bodies, such as but not limited to at least one of corundum bricks and zircon bricks, preferably dense zircon bricks or high zircon bricks. Two electrode plates 3 are arranged in the furnace, and the electrode plates can be conventional electrode plates such as platinum electrodes, and the two electrode plates have the same size. The two electrode plates are arranged in a direction perpendicular to the wire-drawing furnace bottom bricks, and the two electrode plates are arranged parallel and side by side.

[0042] Wherein, t...

Embodiment 2

[0055] This embodiment provides a wire drawing furnace, which differs from Embodiment 1 only in the parameters of the wire drawing furnace. The parameters of the wire drawing furnace in this embodiment are shown in Table 2.

[0056] Table 2 Dimensions of Drawing Furnace in Embodiment 2

[0057]

[0058] The volume of the molten glass covered by the electric force line is 0.45 times the volume of the molten glass (denoted as xyz / abh). The conductive area of ​​the electrode plate is 0.54 times the conductive cross-sectional area of ​​the glass liquid (denoted as yz / bh).

[0059] This embodiment also provides a method for preparing glass fibers, comprising the following steps: taking alkali-free glass balls and putting the alkali-free glass balls into each drawing furnace according to the depth of the glass liquid in this embodiment, energizing and heating up, and the hot spot temperature is Drawing is carried out at 1340°C to obtain glass fibers.

Embodiment 3

[0061] This embodiment provides a wire drawing furnace, which differs from Embodiment 1 only in that the length of the flow hole is 180 mm, and the length of the electrode is 1.7 times the length of the flow hole.

[0062] This embodiment also provides a method for preparing glass fibers, comprising the following steps: taking alkali-free glass balls and putting the alkali-free glass balls into each drawing furnace according to the depth of the glass liquid in this embodiment, energizing and heating up, and the hot spot temperature is Drawing is carried out at 1330°C to obtain glass fibers.

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Abstract

The invention provides a glass fiber drawing furnace and a method for preparing a glass fiber by using the same. The conductive area of an electrode plate is controlled to be larger than or equal to 0.5 time of the conductive sectional area of molten glass, and the volume of the molten glass covered by the power line is controlled to be larger than or equal to 0.45-0.8 time of the volume of the molten glass, so the temperature field distribution uniformity of the molten glass is improved, the difference value between the hot-spot temperature and the liquid level temperature is smaller than or equal to 45 DEG C, the difference value between the hot-spot temperature and the bottom brick temperature is smaller than or equal to 50 DEG C, and the temperature difference between every two adjacent liquid levels is smaller than or equal to 16 DEG C, therefore, the drawing efficiency of glass fibers is remarkably improved, and more reasonable power line distribution and more uniform temperature field distribution are ensured; and the power line pushes conductive rotation, flowing and friction heat generation of glass ions, so that crystallization and phase splitting of the glass at low temperature are inhibited, the melting quality of molten glass can be fully improved, and the stability of wire drawing operation is improved.

Description

technical field [0001] The invention relates to the technical field of glass fiber yarn production equipment and technology, in particular to a glass fiber drawing furnace and a method for preparing glass fiber using the glass fiber drawing furnace. Background technique [0002] Glass fiber is an inorganic non-metallic material with excellent performance. It has the advantages of good insulation, strong heat resistance, good corrosion resistance and high mechanical strength. It is widely used as reinforcing materials, insulating materials, thermal insulation materials and other fields. In the production process of glass fiber, glass raw materials need to be melted and drawn. [0003] The patent "CN87202593U" provides a kind of offset long drawing furnace (crucible). This crucible is conducive to the drawing of medium-alkali and alkali-free glass fibers and ordinary glass fibers. Low, it is prone to uneven chemical materials affecting fiber formation, and cannot well realize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/092C03B37/025
CPCC03B37/092C03B37/025C03B37/0253Y02P40/57
Inventor 张焱黄荣军郭仁贤唐小波蔡增伟周建淼
Owner NANJING FIBERGLASS RES & DESIGN INST CO LTD
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