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Preparation method of continuous basalt fibers

A technology of basalt fiber and basalt, which is applied in the field of continuous basalt fiber preparation, can solve problems such as large internal stress, reduced toughness of basalt fiber, and waste of energy, so as to improve toughness and tensile strength, reduce heating and melting time, and reduce energy consumption. The effect of consumption

Active Publication Date: 2016-08-10
江苏狮腾工程材料有限公司
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AI Technical Summary

Problems solved by technology

[0003] Basalt is an amorphous material, which has the characteristics of high rigidity, large internal stress and high melting point, especially the poor thermal conductivity of basalt, which leads to inconsistent cooling and solidification speeds inside and outside the fiber during the basalt wire drawing process, and basalt also contains iron elements, which are easy to Crystallization precipitates, so that the tensile stress is concentrated on the surface of the fiber, causing the fiber to break easily during the stretching process, and it is difficult to obtain continuous ultra-fine basalt fiber by one-time stretching
In the prior art, in order to obtain continuous ultra-fine basalt fibers, the basalt fibers are subjected to secondary heating and stretching, which not only wastes a lot of energy and increases production costs, but also has complicated processes and difficult condition control, and the quality of the obtained continuous basalt fibers is unstable. Influence the application and development of basalt fiber
[0004] Chinese Patent Publication No. CN102786220A discloses a production method of ultra-fine basalt continuous fiber. The method uses inorganic acid to remove iron in basalt ore. The probability of fracture during stretching, but the defect of inconsistent cooling and solidification speed inside and outside the fiber caused by the poor thermal conductivity of basalt has not been improved, and the defect of easy fracture during stretching still exists, and the inorganic acid will also remove part of the aluminum while removing iron, so that As a result, the aluminum content in basalt is reduced, the toughness of basalt fiber is reduced, and the brittleness is greater, which is not conducive to the application of basalt fiber
[0005] Chinese Patent Publication No. CN1884164B discloses a method for manufacturing basalt fibers. The method adopts the method of adding oxides such as alumina, calcium oxide, and magnesium oxide in basalt ore to increase the toughness of basalt fibers, thereby reducing the hardness of basalt fibers. The probability of breaking during the stretching process, although this method increases the toughness of the basalt fiber, but the poor thermal conductivity of the basalt causes the defect of inconsistent cooling and solidification speed inside and outside the fiber, and the defect of easy fracture during stretching still exists. Moreover, various The addition of oxides increases the toughness of basalt fibers, but reduces the tensile strength of basalt fibers, which is not conducive to the application of basalt fibers
[0006] In summary, there is currently no method that can effectively improve the easy fracture of basalt fibers during stretching, so as to obtain continuous basalt fiber materials

Method used

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  • Preparation method of continuous basalt fibers
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  • Preparation method of continuous basalt fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Immerse 100kg of basalt ore in a pool, wash it, remove impurities that may be attached to the surface, then take it out to dry, and crush the dried basalt ore with a pulverizer to a fineness of 2mm to obtain basalt ore powder;

[0033] 2) Ball mill and mix the basalt ore powder obtained in step 1) with 0.001 kg of graphene for 1 hour, and discharge after mixing evenly to obtain the mixed powder;

[0034] 3) Add the mixed powder obtained in step 2) into the kiln, and feed nitrogen into the kiln, raise the temperature to 1300°C, and stir at the same time, so that the basalt powder is completely melted, and the modifier is evenly dispersed and suspended in the basalt A spinning melt is formed in the melt;

[0035] 4) Drawing the spinning melt obtained in step 3) with a platinum-rhodium alloy drawing bushing with 200 holes at a temperature of 1200°C at a speed of 1500m / min to obtain basalt fiber precursors;

[0036] 5) The raw silk obtained in step 4) is unwound and twi...

Embodiment 2

[0040]1) Immerse 100kg of basalt ore in a pool, rinse, remove impurities that may be attached to the surface, then take it out to dry, and pulverize the dried basalt ore with a pulverizer to a fineness of 1mm to obtain basalt ore powder;

[0041] 2) The basalt ore powder obtained in step 1) was ball-milled and mixed with 0.1 kg of graphene oxide for 2 hours, and the mixture was uniformly discharged to obtain a mixed powder;

[0042] 3) adding the mixed powder obtained in step 2) into the kiln, heating up to 1500 ° C, and stirring at the same time, so that the basalt powder is completely melted, and the modifier is uniformly dispersed and suspended in the basalt melt to form a spinning melt;

[0043] 4) Drawing the spinning melt obtained in step 3) at a speed of 3000 m / min with a platinum-rhodium alloy wire drawing bushing with 800 holes and a temperature of 1300° C. to obtain basalt fiber precursors;

[0044] 5) Unraveling and twisting the raw silk obtained in step 4) to form ...

Embodiment 3

[0048] 1) Immerse 100kg of basalt ore in the pool, rinse it, remove the impurities that may be attached to the surface, then take it out to dry, and pulverize the dried basalt ore with a pulverizer to a fineness of 0.5mm to obtain basalt ore powder ;

[0049] 2) The basalt ore powder obtained in step 1) is ball-milled and mixed with 0.01 kg of graphene for 1 hour, and the mixture is uniformly discharged to obtain a mixed powder;

[0050] 3) Add the mixed powder obtained in step 2) into the kiln, pass nitrogen into the kiln, heat up to 1400°C, and stir at the same time, so that the basalt powder is completely melted, and the modifier is uniformly dispersed and suspended in the basalt. A spinning melt is formed in the melt;

[0051] 4) Drawing the spinning melt obtained in step 3) at a speed of 2500 m / min with a platinum-rhodium alloy wire drawing bushing with 400 holes and a temperature of 1250° C. to obtain basalt fiber precursors;

[0052] 5) Unraveling and twisting the raw...

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Abstract

The invention discloses a preparation method of continuous basalt fibers. A modifier in basalt can fast transfer heat so that heat in the basalt fibers is easily transferred to the fiber surfaces, cooling curing rates inside and outside the fibers are the same, fiber toughness and strength are improved, and basalt fibers bear uniform load in stretching and are not easily broken so that the continuous basalt fibers are prepared. The preparation method has simple processes and substantial effects, is suitable for large scale industrial production and has a wide market application prospect.

Description

technical field [0001] The invention relates to the field of basalt fiber materials, in particular to a preparation method of continuous basalt fiber. Background technique [0002] Basalt fiber is a new type of inorganic environmentally friendly green high-performance fiber material, and it is one of the four high-performance fibers that will be developed in my country in the future. The basalt rock material composed of basalt is melted at high temperature and then prepared by spinning process. Basalt continuous fiber not only has good stability, but also has various excellent properties such as electrical insulation, corrosion resistance, combustion resistance, and high temperature resistance. Moreover, the production process of basalt fiber produces less waste and less environmental pollution. It can be directly transferred to the ecological environment without any harm, so it is a veritable green and environmental protection material. Basalt continuous fiber has been wid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/00
CPCC03B37/00
Inventor 不公告发明人
Owner 江苏狮腾工程材料有限公司
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