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Titanium calcium aluminate heat insulation refractory material and preparation method thereof

A technology of refractory materials, calcium aluminate titanate, applied in the field of thermal insulation refractory materials, can solve the problem of reducing the strength and yield of thermal insulation refractory materials, difficulty in controlling foaming agent and foam stability, and poor thermal insulation performance of thermal insulation refractory materials and other issues, to achieve the effect of reducing bulk density and thermal conductivity, improving strength and yield, and high yield

Inactive Publication Date: 2017-05-31
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The foaming method is used to prepare heat-insulating refractory materials, such as "A Mullite Lightweight Refractory Material and Its Preparation Method" (CN 201510186484.8), mainly through mixing foaming agent and refractory raw materials, molding, drying, and firing. Foaming method to prepare thermal insulation refractory materials, its technical defect is that the stability of foaming agent and foam is difficult to control
[0005] The loss-on-burn method is used to prepare heat-insulating refractory materials. The process is simple, and the prepared heat-insulating refractory materials have uniform and controllable pores. However, the heat-insulating refractory materials prepared by the loss-on-burn method completely depend on the size of the combustibles. Therefore, Generally, the pore size is large, and the thermal insulation performance of the prepared thermal insulation refractory is poor.
[0006] The thermal insulation refractory material is prepared by chemical method, and its chemical reaction rate is faster, which reduces the strength and yield of the thermal insulation refractory material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A calcium aluminate heat-insulating refractory material and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0037] The first step is to put DDBAC foaming agent, polyacrylamide, calcium bicarbonate, tetrabutyl titanate and water into the container under the condition of 30-35°C water bath, and ultrasonically disperse for 5-7 minutes to obtain foam liquid; wherein, DDBAC blowing agent: polyacrylamide: calcium bicarbonate: tetrabutyl titanate: water mass ratio is 1: (0.5 ~ 0.7): (4 ~ 6): (3 ~ 5): (30 ~34).

[0038] The second step, according to the mass ratio of the foaming liquid: ρ-alumina micropowder: ferro-titanium slag micropowder (50~54): (1~1.4): 100, the foaming liquid, ρ-alumina The micropowder and the ferrotitanium slag micropowder are mixed, stirred for 5 to 7 minutes, and then put into a mold for molding to obtain a molded billet.

[0039] The third step is to place the shaped blank in a vacuum f...

Embodiment 2

[0043] A calcium aluminate heat-insulating refractory material and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0044] The first step is to put DDBAC foaming agent, polyacrylamide, calcium bicarbonate, tetrabutyl titanate and water into the container under the condition of 30-35°C water bath, and ultrasonically disperse for 5-7 minutes to obtain foam liquid; wherein, DDBAC foaming agent: polyacrylamide: calcium bicarbonate: tetrabutyl titanate: water mass ratio is 1: (0.6 ~ 0.8): (4 ~ 6): (3 ~ 5): (32 ~36).

[0045] In the second step, according to the mass ratio of the foaming liquid: ρ-alumina micropowder: ferrotitanium slag micropowder (52~56): (1.2~1.6): 100, the foaming liquid, ρ-alumina The micropowder and the ferrotitanium slag micropowder are mixed, stirred for 5 to 7 minutes, and then put into a mold for molding to obtain a molded billet.

[0046] The third step is to place the shaped blank in a vacu...

Embodiment 3

[0050] A calcium aluminate heat-insulating refractory material and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0051]The first step is to put DDBAC foaming agent, polyacrylamide, calcium bicarbonate, tetrabutyl titanate and water into the container under the condition of 30-35°C water bath, and ultrasonically disperse for 5-7 minutes to obtain foam liquid; wherein, DDBAC blowing agent: polyacrylamide: calcium bicarbonate: tetrabutyl titanate: water mass ratio is 1: (0.7~0.9): (5~7): (4~6): (34 ~38).

[0052] The second step, according to the mass ratio of the foaming liquid: ρ-alumina micropowder: ferrotitanium slag micropowder (54~58): (1.4~1.8): 100, the foaming liquid, ρ-alumina The micropowder and the ferrotitanium slag micropowder are mixed, stirred for 5 to 7 minutes, and then put into a mold for molding to obtain a molded billet.

[0053] The third step is to place the shaped blank in a vacuum freeze ...

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Abstract

The invention relates to a titanium calcium aluminate heat insulation refractory material and a preparation method thereof. The titanium calcium aluminate heat insulation refractory material is characterized in that the method comprises the steps of blending a dodecyl dimethyl benzyl ammonium chloride (DDBAC) foaming agent, polyacrylamide, calcium hydrogen carbonate, tetrabutyl titanate and water, wherein the mass ratio of the DDBAC foaming agent to the polyacrylamide to the calcium hydrogen carbonate to the tetrabutyl titanate to the water is equal to 1: (0.5-1): (4-7): (3-6): (30-40); carrying out ultrasonic dispersion under the condition of water bath so as to prepare foaming liquid; blending the foaming liquid, rho-alumina micropowder and titanium-iron slag micropowder, wherein the mass ratio of the foaming liquid to the rho-alumina micropowder to the titanium-iron slag micropowder is equal to (50-60): (1-2): 100; mixing, stirring, molding, and carrying out vacuum freeze drying; putting the product into a muffle furnace, carrying out heat preservation at the temperature of 1450-1500 DEG C for 40-60min, and naturally cooling the product along with the furnace so as to obtain the titanium calcium aluminate heat insulation refractory material. The preparation method provided by the invention has the characteristics of being low in cost, simple in technology and high in rate of finished products; the prepared titanium calcium aluminate heat insulation refractory material is low in volume density, high in compression strength and small in heat conductivity coefficient.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation refractory materials. In particular, it relates to a calcium aluminate heat-insulating refractory material and a preparation method thereof. Background technique [0002] Calcium aluminum titanate is Al 2 O 3 -TiO 2 - An important phase that exists stably in the CaO ternary system, has the characteristics of high melting point, high strength and low thermal conductivity, and can be used to prepare low thermal conductivity, high strength thermal insulation refractory materials. [0003] At present, the preparation of heat-insulating refractory materials can be divided into foaming method, burn-out method and chemical method according to different processes; according to different materials, it can be divided into mullite, olivine and calcium hexaaluminate heat-insulating refractory materials Wait. [0004] The foaming method is used to prepare heat-insulating refractory materials, s...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/465C04B35/478C04B38/02
CPCC04B35/66C04B35/465C04B35/478C04B38/02C04B2235/77C04B2235/96C04B2235/9607C04B38/0067
Inventor 张寒李雪松谈凯强魏崇阳周佳昌邹宜名赵惠忠
Owner WUHAN UNIV OF SCI & TECH
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