CN110642640B - Light high-temperature-resistant heat-insulation filler and preparation method thereof - Google Patents

Light high-temperature-resistant heat-insulation filler and preparation method thereof Download PDF

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CN110642640B
CN110642640B CN201911106617.0A CN201911106617A CN110642640B CN 110642640 B CN110642640 B CN 110642640B CN 201911106617 A CN201911106617 A CN 201911106617A CN 110642640 B CN110642640 B CN 110642640B
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ball
temperature
ball core
light
resistant heat
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CN110642640A (en
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单丹
张帆
赵春芳
董正洪
张红阳
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TIANJIN SINOMA ENGINEERING RESEARCH CENTER CO LTD
Tianjin Cement Industry Design and Research Institute Co Ltd
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TIANJIN SINOMA ENGINEERING RESEARCH CENTER CO LTD
Tianjin Cement Industry Design and Research Institute Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/30Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Other silicon-containing organic compounds; Boron-organic compounds
    • C04B26/32Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Other silicon-containing organic compounds; Boron-organic compounds containing silicon
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/06Aluminous cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/40Porous or lightweight materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/76Use at unusual temperatures, e.g. sub-zero
    • C04B2111/763High temperatures
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/20Mortars, concrete or artificial stone characterised by specific physical values for the density
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The invention belongs to the field of light high-temperature-resistant heat-insulating filler, and particularly relates to light high-temperature-resistant heat-insulating filler and a preparation method thereof, wherein the light high-temperature-resistant heat-insulating filler comprises the following components in parts by weight: the ball comprises a ball core and a ball shell, wherein the ball core comprises refractory fibers, the ball shell comprises an adhesive and chopped refractory fibers, and the adhesive wraps the chopped refractory fibers. The invention provides a light high-temperature-resistant heat-insulating filler which can be used as a filler and has the advantages of light weight, high strength, high temperature resistance and low heat conduction.

Description

Light high-temperature-resistant heat-insulation filler and preparation method thereof
Technical Field
The invention belongs to the field of light high-temperature-resistant heat-insulating filler, and particularly relates to light high-temperature-resistant heat-insulating filler and a preparation method thereof.
Background
The prior art and the defects are as follows:
with the progress of science and technology, the promotion of energy-saving and environmental protection policies and the development of market competition, the structure of the industrial kiln is continuously improved and optimized. For a high-temperature kiln, the thermal conductivity of the heat insulation material represents the heat transferred by unit area in unit time, and is an important index of the heat insulation material. For industrial kilns, in most cases, a lower thermal conductivity of the product is required to reduce the heat losses of the kiln. Conventional insulation materials, represented by insulating fibreboards, have a low thermal conductivity (as the product referred to in patent CN 201510163273), but due to their compressive strengthLow, can only be used as an auxiliary material; while the conventional insulating brick (such as the insulating alkali-resistant brick of Shandong Zibo City Luzhong refractory material Co., Ltd.) has high compressive strength (not less than 15MPa) and high density (not less than 1.65 g/m)3) The heat conduction and absorption number is obviously higher than that of the heat insulation fiberboard (less than or equal to 0.7 w/m.k).
The difficulty and significance for solving the technical problems are as follows:
therefore, based on the problems, it is of great practical significance to provide a light-weight high-temperature-resistant heat-insulation filler which can be used as a filler and has the advantages of light weight, high strength, high temperature resistance and low heat conductivity.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provide a light high-temperature-resistant heat-insulating filler which can be used as a filler and has the advantages of light weight, high strength, high temperature resistance and low heat conduction.
The invention also aims to solve the technical problems in the prior art and provide a preparation method of the light high-temperature-resistant heat-insulating filler which can be used as a filler and has the advantages of light weight, high strength, high temperature resistance and low heat conductivity.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows:
a lightweight, high temperature resistant, and thermal insulating filler, comprising: the ball comprises a ball core and a ball shell, wherein the ball core comprises refractory fibers, the ball shell comprises an adhesive and chopped refractory fibers, and the adhesive wraps the chopped refractory fibers.
The invention takes the refractory fiber ball as the ball core, can effectively reduce the overall density of the filler, and the ball shell is composed of the fiber reinforced inorganic binder, has controllable thickness, can ensure the overall compressive strength of the filler, and has the characteristics of light weight and high strength.
The filler (fiber and adhesive) is inorganic, has good temperature resistance, can still maintain high mechanical property in a high-temperature environment, and has the characteristic of high temperature resistance.
The invention can also adopt the following technical scheme:
in the above-mentioned light weight and durableIn the high-temperature heat-insulating filler, the diameter of the ball core is 5-15mm, and the density of the ball core is 40-120kg/m3
The diameter of the ball core is 5-15mm, and if the diameter of the ball core is too small, the hollow ball filler is difficult to form; if the diameter of the ball core is too large, the mixing and casting molding of the filler and the refractory casting material are not facilitated during use; by controlling the density of the ball core, the air gap in the ball core fiber cluster is smaller, and the convection heat transfer is greatly inhibited; the spherical shell structure has low heat conduction coefficient, so that the filler has good heat insulation effect and low heat conduction.
A preparation method of a light high-temperature-resistant heat-insulation filler is used for preparing any one of the light high-temperature-resistant heat-insulation fillers, and comprises the following steps:
the method comprises the following steps: crushing and sieving the refractory fiber mass, putting the crushed and sieved refractory fiber mass into a ball rolling machine, and rolling the refractory fiber mass at a high speed to form a ball core, wherein the diameter of the ball core is 5-15mm, and the density of the ball core is 40-120kg/m3
Step two: immersing the ball core into organic silicon resin or inorganic adhesive;
step three: taking out the ball core, putting the ball core into a ball rolling machine, mixing the ball core with the chopped refractory fiber with the mass 2-5 times of that of the ball core, and rolling and molding the mixture at the temperature of 40-60 ℃ for 30-90 minutes to solidify the ball shell.
In the preparation method of the light high-temperature-resistant heat-insulating filler, further, the refractory fiber in the first step is asbestos, mullite fiber, rock wool or basalt fiber, the chopped refractory fiber in the third step is asbestos, rock wool or basalt fiber, and the inorganic adhesive is aluminate cement, a phosphoric acid-copper oxide adhesive or water glass.
Compared with the traditional glass fiber, carbon fiber, organic and common cement adhesives, the fiber and the adhesive can retain higher mechanical properties at high temperature, and the high-temperature mechanical properties of the light filler taking the fiber and the adhesive as raw materials are ensured.
In the preparation method of the light-weight high-temperature-resistant heat-insulating filler, the refractory fiber in the first step is consistent with the chopped refractory fiber in the third step in material quality.
The refractory fiber and the short refractory fiber are made of the same material, so that the high temperature resistance of the ball core and the ball shell is kept consistent.
In the preparation method of the light high-temperature-resistant heat-insulating filler, further, the method of controlling the forming rotating speed of the ball rolling machine in the first step comprises the following steps: crushing the refractory fiber, screening by a square hole sieve of 20mm-30mm, putting into a ball rolling machine, rolling at the rotating speed of 30-300 r/min to form a ball core, wherein the diameter of the ball core is 5-15mm, and the density of the ball core is 40-120kg/m3
Ensuring that the density of the ball core is 40-120kg/m3
In the preparation method of the light high-temperature-resistant heat-insulating filler, further, in the first step, water which is 0.05-0.1 time of the weight of the refractory fiber is sprayed into the ball rolling machine. And in the step one, the rolling forming time in the ball rolling machine is 10-30 minutes.
In the preparation method of the light high-temperature-resistant heat-insulating filler, further, in the second step, the immersion time of the ball core is 5-30 seconds.
A light refractory material, which uses the light high-temperature-resistant heat-insulating filler.
A light heat insulation material, which uses the light high-temperature-resistant heat insulation filler.
In conclusion, the invention has the following advantages and positive effects:
1. the invention takes the refractory fiber ball as the ball core, can effectively reduce the overall density of the filler, and the ball shell is composed of the fiber reinforced inorganic binder, has controllable thickness, can ensure the overall compressive strength of the filler, and has the characteristics of light weight and high strength.
2. The filler (fiber and adhesive) is inorganic, has good temperature resistance, can still maintain high mechanical property in a high-temperature environment, and has the characteristic of high temperature resistance.
3. The diameter of the ball core is 5-15mm, and if the diameter of the ball core is too small, the hollow ball filler is difficult to form; if the diameter of the ball core is too large, the mixing and casting molding of the filler and the refractory casting material are not facilitated during use; by controlling the density of the ball core, the air gap in the ball core fiber cluster is smaller, and the convection heat transfer is greatly inhibited; the spherical shell structure has low heat conduction coefficient, so that the filler has good heat insulation effect and low heat conduction.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following examples are illustrated, and the following detailed descriptions are given:
example 1
1. Crushing asbestos fiber, sieving with a 20mm square-hole sieve, and putting into a ball rolling machine; spraying water with weight 0.05 times of that of the fiber, rolling and molding at the rotating speed of 30 r/min for 10 min, and sorting to obtain the fiber with diameter of 15 +/-2 mm and density of 40-80kg/m3The core of (3);
2. immersing the ball core into organic silicon resin for 5 seconds and then taking out;
3. and putting the ball core into a ball rolling machine, mixing the ball core with chopped asbestos fiber with the mass 2 times that of the ball core, and rolling and molding for 30 minutes at 40 ℃ to solidify the ball shell to obtain the light high-temperature-resistant heat-insulating filler.
Example 2
1. Crushing mullite fiber, sieving with a 20mm square-hole sieve, and putting into a ball rolling machine; spraying water with weight 0.1 times of that of the fiber, rolling and molding at the rotating speed of 300 r/min for 30 min, and sorting to obtain fiber with diameter of 5 + -2 mm and density of 60-120kg/m3The core of (3);
2. immersing the ball core into aluminate cement for 30 seconds and then taking out;
3. and putting the ball core into a ball rolling machine, mixing the ball core with the chopped mullite fiber with the mass 5 times that of the ball core, and rolling and molding for 90 minutes at 60 ℃ to solidify the ball shell to obtain the light high-temperature-resistant heat-insulation filler.
Example 3
1. Crushing basalt fibers, screening by using a 20mm square hole sieve, and putting into a ball rolling machine; spraying water 0.1 times the weight of the fiber, and rolling at 300 rpmAfter 20 minutes of molding, the mixture is sorted to obtain the product with the diameter of 15 +/-2 mm and the density of 60-120kg/m3The core of (3);
2. immersing the ball core into a phosphoric acid-copper oxide adhesive for 30 seconds and then taking out;
3. and putting the ball core into a ball rolling machine, mixing the ball core with chopped basalt fibers with the mass 5 times of that of the ball core, and rolling and molding for 60 minutes at 60 ℃ to solidify the ball shell to obtain the light high-temperature-resistant heat-insulating filler.
Example 4
1. Crushing rock wool fibers, screening the rock wool fibers by a square hole sieve with the size of 20mm, and putting the rock wool fibers into a ball rolling machine; spraying water with weight 0.1 times of that of the fiber, rolling and molding at the rotating speed of 200 r/min for 20 min, and sorting to obtain fiber with diameter of 11 + -2 mm and density of 40-100kg/m3The core of (3);
2. soaking the ball core in water glass for 30 seconds and then taking out;
3. and putting the ball core into a ball rolling machine, mixing the ball core with chopped rock wool fiber with the mass of 3.5 times of that of the ball core, and rolling and forming for 90 minutes at 60 ℃ to solidify the ball shell to obtain the light high-temperature-resistant heat-insulating filler.
Examples 1-4 the performance parameters are shown in the following table:
performance of Example 1 Example 2 Example 3 Example 4
Density (g/cm)3) 0.61±0.02 0.86±0.02 0.78±0.02 0.82±0.02
Diameter (mm) 14-17 4-8 15-18 9-12
Barrel pressure intensity (MPa) ≥2.3 ≥5.6 ≥5.5 ≥4.1
In conclusion, the invention can provide the light high-temperature-resistant heat-insulating filler which can be used as the filler and has the advantages of light weight, high strength, high temperature resistance and low heat conduction.
A light refractory material, which uses the light high-temperature-resistant heat-insulating filler.
A light heat insulation material, which uses the light high-temperature-resistant heat insulation filler.
The filler is mixed with the raw material of the refractory brick, and the product is obtained by mixing, forming, drying and calcining. The density of the product is 1.3g/cm through testing3The compressive strength is 22MPa, the heat conductivity coefficient is 0.6w/m.k, and the performance parameters are obviously superior to those of the conventional insulating brick.
The present invention has been described in detail with reference to the above examples, but the description is only for the preferred examples of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims (6)

1. A preparation method of a light high-temperature-resistant heat-insulation filler is characterized by comprising the following steps:
the light high-temperature-resistant heat-insulating filler comprises: the ball comprises a ball core and a ball shell, wherein the ball core comprises refractory fibers, the ball shell comprises an adhesive and chopped refractory fibers, and the adhesive wraps the chopped refractory fibers;
the diameter of the ball core is 5-15mm, and the density of the ball core is 40-120kg/m3
The preparation method of the light high-temperature-resistant heat-insulation filler comprises the following steps:
the method comprises the following steps: crushing and sieving the refractory fiber mass, putting the crushed and sieved refractory fiber mass into a ball rolling machine, and rolling the refractory fiber mass at a high speed to form a ball core, wherein the diameter of the ball core is 5-15mm, and the density of the ball core is 40-120kg/m3
Step two: immersing the ball core into organic silicon resin or inorganic adhesive;
step three: taking out the ball core, putting the ball core into a ball rolling machine, mixing the ball core with the chopped refractory fiber with the mass 2-5 times of that of the ball core, and rolling and molding the mixture at the temperature of 40-60 ℃ for 30-90 minutes to solidify the ball shell.
2. The preparation method of the light high-temperature-resistant heat-insulating filler according to claim 1, characterized in that: the refractory fiber in the first step is asbestos, mullite fiber, rock wool or basalt fiber, the short-cut refractory fiber in the third step is asbestos, rock wool or basalt fiber, and the inorganic adhesive is aluminate cement, phosphoric acid-copper oxide adhesive or water glass.
3. The preparation method of the light high-temperature-resistant heat-insulating filler according to claim 2, characterized in that: the material of the refractory fiber in the first step is consistent with that of the chopped refractory fiber in the third step.
4. The preparation method of the light high-temperature-resistant heat-insulating filler according to claim 1, characterized in that: the method for controlling the forming rotating speed of the ball rolling machine in the first step comprises the following steps: breaking up the refractory fibres, 2Putting the sieved powder into a ball rolling machine after sieving with a square hole of 0mm-30mm, rolling at the rotating speed of 30-300 r/min to form a ball core, wherein the diameter of the ball core is 5-15mm, and the density of the ball core is 40-120kg/m3
5. The preparation method of the light high-temperature-resistant heat-insulating filler according to claim 4, characterized in that: in the first step, water which is 0.05-0.1 time of the weight of the refractory fiber is sprayed into the ball rolling machine, and the time for rolling and forming in the first step in the ball rolling machine is 10-30 minutes.
6. The preparation method of the light high-temperature-resistant heat-insulating filler according to claim 1, characterized in that: and in the second step, the immersion time of the ball core is 5-30 seconds.
CN201911106617.0A 2019-11-13 2019-11-13 Light high-temperature-resistant heat-insulation filler and preparation method thereof Active CN110642640B (en)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04285078A (en) * 1991-03-14 1992-10-09 Nippon Steel Chem Co Ltd Lightweight composite panel
JP2004352610A (en) * 2004-07-26 2004-12-16 Sanki Tsuuun Kk Underlaying material
CN102180639A (en) * 2011-02-24 2011-09-14 卢清友 Environment-friendly light heat-insulating material and manufacturing method thereof
CN103819107A (en) * 2014-01-07 2014-05-28 苏州市兴邦化学建材有限公司 Half shell fiber concrete additive
CN104130549A (en) * 2014-08-01 2014-11-05 上海海事大学 Fiber reinforced resin composite hollow ball and preparation method thereof
CN105542219A (en) * 2016-02-26 2016-05-04 天津中材工程研究中心有限公司 Preparation method for light high-strength composite hollow sphere
CN106046412A (en) * 2016-06-30 2016-10-26 台州中浮新材料科技股份有限公司 Hollow ball with ball wall made from composite material and layer-by-layer coating method for manufacturing hollow ball
CN106631065A (en) * 2016-12-23 2017-05-10 郑州大学 Vacuum insulating refractory product and preparation method thereof
CN106750492A (en) * 2017-02-13 2017-05-31 广东国利先进复合材料研发有限公司 A kind of preparation method of carbon fiber hollow ball
CN106751531A (en) * 2017-02-13 2017-05-31 广东国利先进复合材料研发有限公司 A kind of preparation method of waterproof casing

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04285078A (en) * 1991-03-14 1992-10-09 Nippon Steel Chem Co Ltd Lightweight composite panel
JP2004352610A (en) * 2004-07-26 2004-12-16 Sanki Tsuuun Kk Underlaying material
CN102180639A (en) * 2011-02-24 2011-09-14 卢清友 Environment-friendly light heat-insulating material and manufacturing method thereof
CN103819107A (en) * 2014-01-07 2014-05-28 苏州市兴邦化学建材有限公司 Half shell fiber concrete additive
CN104130549A (en) * 2014-08-01 2014-11-05 上海海事大学 Fiber reinforced resin composite hollow ball and preparation method thereof
CN105542219A (en) * 2016-02-26 2016-05-04 天津中材工程研究中心有限公司 Preparation method for light high-strength composite hollow sphere
CN106046412A (en) * 2016-06-30 2016-10-26 台州中浮新材料科技股份有限公司 Hollow ball with ball wall made from composite material and layer-by-layer coating method for manufacturing hollow ball
CN106631065A (en) * 2016-12-23 2017-05-10 郑州大学 Vacuum insulating refractory product and preparation method thereof
CN106750492A (en) * 2017-02-13 2017-05-31 广东国利先进复合材料研发有限公司 A kind of preparation method of carbon fiber hollow ball
CN106751531A (en) * 2017-02-13 2017-05-31 广东国利先进复合材料研发有限公司 A kind of preparation method of waterproof casing

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