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Composite mineral fiber and preparation method thereof

A technology for compounding mineral fibers and materials, applied in glass manufacturing equipment, manufacturing tools, etc., can solve the problems of inability to meet the requirements of asbestos thermal insulation, fire resistance and wear resistance, application field limitations, low tensile strength, etc., and achieve The effect of low cost, easy operation and simple preparation method

Active Publication Date: 2012-07-18
大连环球矿产股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because this kind of fiber only considers its alkali resistance, its thermal conductivity is poor, and its tensile strength is low, which cannot meet the requirements of asbestos for thermal insulation, fire resistance and wear resistance, and because it is melted at high temperature, so High cost and limited application fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] ①Process the attapulgite clay in the LHJ-70 ultrafine mechanical pulverizer, adjust the classifier rotation speed to 2000r / min, so that the particle size of the attapulgite clay powder is 5um; put the needle-shaped wollastonite in the HFG400 fluidized bed Counter-jet jet mill processing, classification wheel rotation speed 2000r / min, so that the particle size of needle-shaped wollastonite powder is 5um;

[0023] 2. Take step 1. 8 mass parts of attapulgite clay fibers with an average particle diameter of 5 um and 2 mass parts of acicular wollastonite fibers with an average particle diameter of 5 um;

[0024] ③At 95°C, add 0.02 parts by mass of silane coupling agent, and stir for 0.2 h at 1000 rpm.

[0025] After testing its chemical composition (mass percentage) is SiO 2 : 60.2%, CaO: 15.8%, MgO: 5.61%, Al 2 o 3 : 4.89%, Fe 2 o 3 : 3.58%, LOI: 9.21%; physical properties: bulk density is 0.32g / cm 3 , the loose specific gravity is 0.19g / cm 3 , whiteness 65.6, oil ab...

Embodiment 2

[0028] ①Process the attapulgite clay in the LHJ-70 ultrafine mechanical pulverizer, adjust the classifier rotation speed to 2000r / min, so that the particle size of the attapulgite clay powder is 5um; put the needle-shaped wollastonite in the HFG400 fluidized bed Type counter-jet jet mill processing, grading rotation speed 2000r / min, so that the particle size of acicular wollastonite powder is 8um;

[0029] 2. Take step 1. 6 parts by weight of attapulgite clay fibers with an average particle size of 5 um and 4 parts by weight of acicular wollastonite fibers with an average particle size of 8 um;

[0030] ③At 100°C, add 0.015 parts by weight of silane coupling agent, and stir at 1000rpm for 0.2h.

[0031] After testing its chemical composition (mass percentage) is SiO 2 : 53.87%, CaO: 26.86%, MgO: 4.53%, Al 2 o 3 : 3.73%, Fe 2 o 3 : 2.46%, LOI: 7.45%; physical properties: bulk density is 0.44g / cm 3 , the loose specific gravity is 0.244g / cm 3 , whiteness 66.97, oil absorpt...

Embodiment 3

[0034] ① Process the attapulgite clay in the LHJ-70 ultrafine mechanical pulverizer, adjust the classifier rotation speed to 2000r / min, so that the particle size of the attapulgite clay powder is 8um; put the needle-shaped wollastonite in the HFG400 fluidized bed Counter-jet jet mill processing, classification wheel rotation speed 2000r / min, so that the particle size of needle-shaped wollastonite powder is 18um;

[0035] 2. Get 4 parts by weight of the attapulgite clay fiber with an average particle size of 8 um in step 1, and 6 parts by weight of the acicular wollastonite fiber with an average particle size of 18 um;

[0036] ③Stir for 1 hour at 1200rpm.

[0037] After testing its chemical composition (mass percentage) is SiO 2 : 50.68%, CaO: 32.15%, MgO: 3.69%, Al 2 o 3 : 2.63%, Fe 2 o 3 : 1.98%, LOI: 7.84%; physical properties: bulk density is 0.52g / cm 3 , the loose specific gravity is 0.34g / cm 3, whiteness 80.1, oil absorption value 58.6%.

[0038] Applying this pr...

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Abstract

The invention provides a preparation method of composite mineral fiber, which comprises the steps as follows: (1) according to weight percentages, 20 to 80 percent of attapulgite clay powder is mixed with 20 to 80 percent of needle-like wollastonite powder; and (2) an additive with a weight percentage of 0 to 3.0 percent is added for reaction for 0.1 to 3.5h at a temperature of 95 DEG C to 105 DEG C. As the attapulgite clay and the needle-like wollastonite are adopted as main raw materials and matched with the additive, the preparation method is simple and convenient to operate; and the obtained composite material has better physico-chemical performance than asbestos, is poisonless and harmless, is low in cost and has great economic benefits and social benefits.

Description

technical field [0001] The invention relates to a composite mineral fiber material, which belongs to the field of functional materials. Background technique [0002] Asbestos fibers have been confirmed to be harmful to the human body, and many countries have banned their use. In the research of replacing asbestos fibers, many synthetic fibers are being used. Chinese patent 87108257 discloses a preparation method of wollastonite fused glass fiber, which is to mix and melt wollastonite, magnesium oxide, aluminum oxide and other materials to make fibers. Because this kind of fiber only considers its alkali resistance, its thermal conductivity is poor, and its tensile strength is low, which cannot meet the requirements of asbestos for thermal insulation, fire resistance and wear resistance, and because it is melted at high temperature, so The cost is high and the application field is limited. [0003] The world's proven reserves of attapulgite clay are about 40 million tons, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/00C03C13/06
CPCC03C13/06C03C3/087
Inventor 张延大张梦显
Owner 大连环球矿产股份有限公司
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