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Preparation method of light refractory plate

A manufacturing method and technology of refractory boards are applied in the field of refractory materials to achieve good promotion and application prospects

Inactive Publication Date: 2013-04-10
BEIJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the existing methods for producing lightweight refractory materials, provide a manufacturing method that can save resources, protect the environment, and effectively solve the defects of existing methods for preparing lightweight refractory materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0014] Example 1: the formula consists of: talc powder 28wt%, high alumina bauxite powder 27wt%, clay powder 45wt%, and the volume ratio of the expanded vitrified microspheres and the mixture (talcum powder+high bauxite powder+clay powder) is 1:6. The talcum powder, high alumina bauxite powder and clay powder are pre-mixed, then mixed with expanded vitrified microspheres and mixed evenly, and finally water is added to make mud and shaped. The formed samples were demoulded after natural drying for 1 day. Then dry in a drying kiln with a drying regime of 110°C×12h. The dried samples were fired in an electric furnace. The firing system was as follows: from room temperature to 1450°C at a heating rate of 4°C / min, holding time of 3h, and cooling with the furnace.

example 2

[0015] Example 2: the formula consists of: talcum powder 15wt%, high alumina bauxite powder 50wt%, clay powder 35wt%, and the volume ratio of the expanded vitrified microspheres and the mixture (talcum powder+high bauxite powder+clay powder) is 1:4. The talcum powder, high alumina bauxite powder and clay powder are pre-mixed, then mixed with expanded vitrified microspheres and mixed evenly, and finally water is added to make mud and shaped. The formed samples were demoulded after natural drying for 1 day. Then dry in a drying kiln with a drying regime of 110°C×12h. The dried samples were fired in an electric furnace. The firing system was as follows: from room temperature to 1450°C at a heating rate of 4°C / min, holding time of 3h, and cooling with the furnace.

example 3

[0016] Example 3: The formula consists of: talcum powder 25, high alumina bauxite powder 40, clay powder 35, and the volume ratio of the expanded vitrified microspheres to the mixture (talcum powder+high bauxite powder+clay powder) is 1:3 . The talcum powder, high alumina bauxite powder and clay powder are pre-mixed, then mixed with expanded vitrified microspheres and mixed evenly, and finally water is added to make mud and shaped. The formed samples were demoulded after natural drying for 1 day. Then dry in a drying kiln with a drying regime of 110°C×12h. The dried samples were fired in an electric furnace. The firing system was as follows: from room temperature to 1450°C at a heating rate of 4°C / min, holding time of 3h, and cooling with the furnace.

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Abstract

The invention discloses a preparation method of a light refractory plate, belonging to the field of the refractory material. The preparation method comprises the following steps: using talcum powder, bauxite powder and clay powder as main raw materials to mix evenly in advance, then adding expansion glazed hollow beads to mix evenly, placing the final mixture in a mixer, adding water to stir, shaping, drying, and firing at 1400-1600 DEG C. The added glazed hollow beads can meet the refractory requirement and also effectively achieve the aim of reducing the weight. The method can be widely used in the fields such as architecture, metallurgy and chemical engineering.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a method for manufacturing a lightweight refractory board. technical background [0002] Refractory materials with high porosity and low bulk density are called lightweight refractory materials, which have porous structure and high heat insulation, so they are also called heat-insulating refractory materials. Refractory materials are composed of main crystal phase and matrix. Due to different material structures (such as particle size and distribution, porosity, pore size and distribution), their heat conduction methods are also different, which directly affects the heat conduction performance of materials. In the main crystal phase and matrix, the heat is carried out by conduction, while in the pores, the heat is carried out by radiation and convection. Since the thermal conductivity of gas is only 1 / 10 of that of solid materials, it can effectively prevent the h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/00C04B38/08
Inventor 严建华刘伟华秦魏罗淑湘刘妍张红芳王倩倩张海滨
Owner BEIJING UNIV OF TECH
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