阅读说明：本技术 一种轻质耐高温隔热填料及其制备方法 (Light high-temperature-resistant heat-insulation filler and preparation method thereof ) 是由 单丹 张帆 赵春芳 董正洪 张红阳 于 2019-11-13 设计创作，主要内容包括：本发明属于轻质耐高温隔热填料领域,尤其涉及一种轻质耐高温隔热填料及其制备方法,所述轻质耐高温隔热填料包括：球芯和球壳,所述球芯包括耐火纤维,所述球壳包括胶黏剂与短切耐火纤维,所述胶黏剂包裹所述短切耐火纤维。本发明提供一种可作为填料使用,兼有轻质高强、耐高温、低导热优点的轻质耐高温隔热填料。(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.)

1. The light high-temperature-resistant heat-insulating filler is characterized in that: 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.

2. The lightweight, high temperature resistant, and thermal insulating filler of claim 1, wherein: the diameter of the ball core is 5-15mm, and the density of the ball core is 40-120kg/m³。

3. A preparation method of a light high-temperature-resistant heat-insulation filler is characterized by comprising the following steps: the preparation method of the light high-temperature-resistant heat-insulating filler is used for preparing the light high-temperature-resistant heat-insulating filler according to any one of claims 1 to 2, 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.

4. The preparation method of the light high-temperature-resistant heat-insulating filler according to claim 3, 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.

5. The preparation method of the light high-temperature-resistant heat-insulating filler according to claim 4, 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.

6. The preparation method of the light high-temperature-resistant heat-insulating filler according to claim 3, characterized in that: the method for 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。

7. The preparation method of the light high-temperature-resistant heat-insulating filler according to claim 6, 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.

8. The preparation method of the light high-temperature-resistant heat-insulating filler according to claim 3, characterized in that: and in the second step, the immersion time of the ball core is 5-30 seconds.

9. A lightweight refractory material characterized by: the lightweight refractory material uses the lightweight high-temperature-resistant heat-insulating filler according to any one of claims 1 to 2.

10. A light heat insulation material is characterized in that: the lightweight thermal insulation material uses the lightweight high-temperature-resistant thermal insulation filler according to any one of claims 1 to 2.

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

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 light high-temperature-resistant 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: