Pressure-resistant anorthite lightweight refractory material and preparation method thereof

A lightweight refractory material, anorthite technology, applied in the field of refractory materials, can solve problems such as deformation, cracking and low strength

Pending Publication Date: 2020-12-11
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] The existing anorthite series lightweight refractory materials, especially refractory brick

Method used

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preparation example Construction

[0021] The invention provides a method for preparing a pressure-resistant anorthite lightweight refractory material, comprising the following steps:

[0022] A) The coal gangue of 48~55wt%, the kyanite of 3~6wt%, the pyrophyllite of 4.5~6.5wt%, the refractory clay of 10~14.5wt%, the calcium carbonate of 9.5~15.5wt%, 5~10wt% The high-alumina cement is mixed with 3-8wt% additives (additional) to obtain castables;

[0023] The particle diameter of the calcium carbonate is 550-650 mesh, the particle diameter of the refractory clay is 300-400 mesh, and the particle diameter of the high alumina cement is 300-400 mesh;

[0024] B) pouring castable material into molding, drying after demoulding, and obtaining a dried green body;

[0025] C) firing the dried body to obtain a pressure-resistant anorthite lightweight refractory material.

[0026] In the present invention, the mass fraction of the coal gangue is preferably 48-55wt%, more preferably 49-54wt%, most preferably 52-54wt%, sp...

Embodiment 1

[0054] Anorthite bricks are composed of 55% coal gangue, 6% kyanite, 5.5% pyrophyllite, 14.5% refractory clay, 10% calcium carbonate, and 9% high alumina cement (Al 2 o 3 Content is 67~69%).

[0055] (1) Add coal gangue (325 mesh), calcium carbonate (600 mesh), kyanite (200 mesh), and pyrophyllite (200 mesh) refractory powder into a ball mill for ball milling for 6 hours until the mesh reaches 2000 mesh .

[0056] (2) Release the slurry after ball milling and put it in the storage tank for standby.

[0057] (3) Add refractory clay (325 mesh), high alumina cement (325 mesh), foaming agent and other auxiliary components to the above mixture and stir to obtain castable;

[0058] (4) Quantitative pouring: 32 molds are poured at one time, the pouring time is 12 minutes, and the indoor temperature is controlled at 25°C.

[0059] (5) Static curing: The solidification time of static curing is controlled at 2 hours, and the solidified state of the slurry reaches the point where the...

Embodiment 2

[0067] Anorthite bricks are composed of 55% coal gangue, 6% kyanite, 5.5% pyrophyllite, 14.5% refractory clay, 10% calcium carbonate, and 9% high alumina cement (Al2O3 content is 67-69%).

[0068] (1) Add coal gangue (325 mesh), 65% calcium carbonate (600 mesh), kyanite (200 mesh), pyrophyllite (200 mesh), refractory clay (325 mesh) refractory powder into ball mill for ball milling, ball milling time For 6h, until the mesh number reaches 2000 mesh.

[0069] (2) Release the slurry after ball milling and put it in the storage tank for standby.

[0070] (3) Add auxiliary components such as 35% calcium carbonate (600 orders), high alumina cement (325 orders), foaming agent to the mixture in step (2) and stir to obtain castable;

[0071] (4) Quantitative pouring: 32 molds are poured at one time, the pouring time is 12 minutes, and the indoor temperature is controlled at 25°C.

[0072] (5) Static curing: The solidification time of static curing is controlled at 2 hours, and the so...

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Abstract

The invention provides a pressure-resistant anorthite lightweight refractory material and a preparation method thereof. The preparation method comprises the steps of A) mixing 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 and 3-8wt% of an auxiliary agent to obtain a castable, wherein the particle size of calcium carbonate is 550-650 meshes, the particle size of the refractory clay is 300-400 meshes, and the particle size of the high-alumina cement is 300-400 meshes; B) molding the castable by casting, demolding, and drying to obtain a dried green body; and C) firing the dried green body to obtain the pressure-resistant anorthite lightweight refractory material. According to the invention, grain composition is carried out, the wet blank strength is improved, and the wet blank qualification rate is improved by about 20%.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a pressure-resistant anorthite lightweight refractory material 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] The existing anorthite series lightweight refractory materials, especi...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/622C04B38/02C04B38/10
CPCC04B35/66C04B35/62204C04B38/02C04B38/10C04B2235/3217C04B2235/349C04B2235/442C04B2235/96
Inventor 刘超郭金胜张成娟唐锋
Owner 山东鲁阳浩特高技术纤维有限公司
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