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Anorthite lightweight refractory material not prone to cracking and preparation method thereof

A lightweight refractory material, anorthite technology, applied in the field of refractory materials, can solve problems such as uncontrollable volume density, easy cracking, and affecting use

Pending Publication Date: 2020-12-04
山东鲁阳浩特高技术纤维有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing anorthite lightweight refractory materials, especially anorthite lightweight refractory bricks, not only have the problem of uncontrollable volume density, and the thermal insulation effect needs to be further improved, but also have the problem of easy cracking or cracks, which affect its use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0044] The present invention provides a kind of preparation method of the hard-to-crack anorthite lightweight refractory material as described above, comprising the following steps:

[0045] A) ball milling coal gangue, kyanite and pyrophyllite to obtain ball milling slurry;

[0046] B) mixing refractory clay and ball mill slurry with ball mill slurry to obtain mixed slurry;

[0047] C) adding high alumina cement, additives and zirconium-containing fibers into the mixed slurry to obtain a castable;

[0048] D) Casting material is poured and molded, and dried after demolding to obtain a dried green body;

[0049] E) firing the dried body to obtain a pressure-resistant anorthite lightweight refractory material.

[0050] In the present invention, the types, amounts and particle sizes of the raw materials used in the above preparation method are consistent with the types, amounts and particle sizes of the above-mentioned raw materials, and will not be repeated here.

[0051] In...

Embodiment 1

[0067] Add 192kg coal gangue (325 mesh), 24kg kyanite (200 mesh), and 18kg pyrophyllite (200 mesh) refractory powder into a ball mill for ball milling for 6 hours until the mesh reaches 2000 mesh.

[0068] The slurry that has been ball milled is released and placed in the storage tank to keep stirring for later use.

[0069] Once stirring, extract 200kg of ball mill slurry and 60kg of refractory powder from the storage tank, including (29kg of refractory clay has a mesh of 325 mesh; 31kg of calcium carbonate has a mesh of 600 mesh.) The refractory powder is stirred for 17 minutes at the same time, and the slurry The temperature is controlled below 40°C;

[0070] Secondary stirring: Add cement 20kg, coagulant 16kg, zirconium-containing fiber 2.0kg and other auxiliary materials at the same time and stir for 15 minutes. After the stirring is completed, add foaming agent and stir for 30 seconds, let it fully stir to make the bubbles more uniform.

[0071] Quantitative pouring: 32...

Embodiment 2

[0079] Add 165kg coal gangue (325 mesh), 15kg kyanite (200 mesh), and 19.5kg pyrophyllite (200 mesh) refractory powder into a ball mill for ball milling for 6 hours until the mesh reaches 2000 mesh.

[0080] The slurry that has been ball milled is released and placed in the storage tank to keep stirring for later use.

[0081] Once stirring, extract 185kg of ball mill slurry and 47.25kg of refractory powder from the storage tank, including (24.05kg of refractory clay has a mesh number of 325 mesh; 23.2kg of calcium carbonate has a mesh number of 600 mesh.) Stir simultaneously for 17 minutes, and the slurry The temperature is controlled below 40°C;

[0082] Secondary stirring: Add cement 9.25kg, coagulant 9.25kg, zirconium-containing fiber 1.85kg and other auxiliary materials at the same time and stir for 15 minutes. After the stirring is completed, add foaming agent and stir for 30 seconds, let it fully stir to make the bubbles more uniform.

[0083] Quantitative pouring: 32 ...

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Abstract

The invention provides a anorthite light refractory material not prone to cracking and a preparation method thereof. The anorthite light refractory material is prepared from 48-55wt% of coal gangue, 3-6wt% of kyanite, 4.5-6.5wt% of pyrophyllite, 10-14.5wt% of refractory clay, 9.5-15.5wt% of calcium carbonate, 5-10wt% of high-alumina cement, 1-3wt% of zirconium-containing fibers and 3-8wt% of an additive, wherein the content of Al2O3 in the zirconium-containing fiber is 35-50wt%, and the content of zirconium in the zirconium-containing fiber is 14-20wt%; and the particle size of the refractoryclay is 300-400 meshes, and the particle size of the calcium carbonate is 550-650 meshes. By adjusting the grain composition of the raw materials used by the anorthite refractory material and cooperatively using the zirconium-containing fibers, the internal structure of the prepared anorthite cast brick is more compact after being sintered, so that the anorthite cast brick has higher compressive strength and is not easy to crack.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to an anorthite lightweight refractory material which is not easy to crack and a preparation method thereof. Background technique [0002] Anorthite bricks have high porosity, low bulk density, and good thermal insulation properties, and are widely used as thermal insulation filling materials for the space between refractory bricks and cylinders inside various industrial kilns. It is used to reduce the heat loss of the kiln to obtain high energy utilization efficiency. The melting point of anorthite is 1550°C. It has the characteristics of low density, small thermal expansion coefficient, low thermal conductivity, and stable existence in reducing atmosphere. It can partially replace clay, siliceous and high Aluminum refractory materials, and realize energy saving and emission reduction. [0003] Existing anorthite lightweight refractory materials, especial...

Claims

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Application Information

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IPC IPC(8): C04B33/132C04B33/28C04B33/30C04B33/32C04B33/36C04B35/66C04B38/00
CPCC04B33/1324C04B33/28C04B33/30C04B33/32C04B33/36C04B35/66C04B38/00C04B2235/3208C04B2235/3222C04B2235/3463C04B2235/5208C04B2235/5436C04B2235/6562C04B2235/6567C04B2235/96C04B2235/9607C04B2235/9615Y02P40/60
Inventor 孟凡伟唐锋刘超郭金胜张成娟张成贺
Owner 山东鲁阳浩特高技术纤维有限公司
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