Refractory castable containing viscoplasticity phase and preparation method thereof

A technology of refractory castables and plastic phases, applied in the field of unshaped refractory materials, can solve the problems of resistance to mechanical stress impact, short service life, poor thermal shock resistance, etc., and achieve the goal of improving toughness, strength and thermal shock resistance Effect

Inactive Publication Date: 2012-09-19
LUOYANG INST OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of existing refractory castables such as high brittleness, poor resistance to mechanical stress shock ...

Method used

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  • Refractory castable containing viscoplasticity phase and preparation method thereof
  • Refractory castable containing viscoplasticity phase and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of a plastic phase-containing refractory castable, comprising the following steps:

[0031] 1) Selection of materials

[0032] Select raw materials with appropriate particle size, including special-grade bauxite clinker particles, mullite particles, white corundum fine powder, super-grade bauxite fine powder, mullite fine powder, kyanite powder, metallic aluminum powder, elemental silicon powder, Alumina micropowder, silica micropowder and calcium aluminate cement, etc. The particle size of each selected material is: 1-8mm for special-grade bauxite clinker particles and mullite particles, 0.044-1mm for special-grade bauxite fine powder, mullite fine powder and white corundum fine powder, kyanite powder, metal The particle size of aluminum powder and elemental silicon powder is 0.044-0.15mm, alumina micropowder and silica micropowder are less than 5 microns, and calcium aluminate cement is less than 0.088mm.

[0033] 2) Preparation of refractory fi...

Embodiment 2

[0044] A preparation method of a plastic phase-containing refractory castable, comprising the following steps:

[0045] 1) Selection of materials

[0046] Select raw materials with appropriate particle size, including special-grade bauxite clinker particles, mullite particles, white corundum fine powder, super-grade bauxite fine powder, mullite fine powder, kyanite powder, metallic aluminum powder, elemental silicon powder, Alumina micropowder, silica micropowder and calcium aluminate cement, the particle size of each selected material is: super-grade bauxite clinker particles and mullite particles are 1-8mm, super-grade bauxite fine powder, mullite fine powder and white Corundum fine powder is 0.044-1mm, the particle size of kyanite powder, metallic aluminum powder and elemental silicon powder is 0.044-0.15mm, alumina fine powder and silica fine powder are less than 5 microns, and calcium aluminate cement is less than 0.088mm. ready after completion;

[0047] 2) Preparation...

Embodiment 3

[0058] A preparation method of a plastic phase-containing refractory castable, comprising the following steps:

[0059] 1) Selection of materials

[0060] Select raw materials with appropriate particle size, including special-grade bauxite clinker particles, white corundum particles, white corundum fine powder, special-grade bauxite fine powder, kyanite powder, metal aluminum powder, elemental silicon powder, alumina fine powder, silicon oxide fine powder And calcium aluminate cement, the particle size of each material selected is: super-grade bauxite clinker particles and mullite particles are 1-8mm, super-grade bauxite clinker particles, mullite particles and white corundum fine powder are 0.044-1mm , the particle size of kyanite powder, metal aluminum powder and elemental silicon powder is 0.044-0.15mm, the alumina micropowder and silica micropowder are less than 5 microns, and the calcium aluminate cement is less than 0.088mm.

[0061] 2) Preparation of refractory fine po...

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Abstract

The invention discloses a refractory castable containing viscoplasticity phase, comprising refractory aggregate, refractory fine powder, oxide fine powder, a bonding agent and an additive, wherein the granularity of the refractory aggregate is 1-8mm, the granularity of the refractory fine powder is 0.044-1mm, the granularity of the oxide fine powder is less than 5mum, and the granularity of the bonding agent is less than 0.088 mm. According to the invention, single-substance aluminum powder and single-substance silicon powder are added into the refractory castable; the single-substance silicon powder is liquefied or softened during the material sintering, so that the material can produce liquid-phase sintering at low temperature to improve the bonding strength; the introduced aluminum powder reacts with water to form Al(OH)3 and then forms Al2O3 with big activity after being heated and decomposed; the SiO2 and Al2O3 react to form needle/column-shaped mullite crystals, therefore strength of the castable is improved; and meanwhile, part silicon powder becomes viscoplasticity phase at high temperature, and disperses in the material, thus, the toughness of the material is improved and the thermal shock resistance of the castable is improved.

Description

technical field [0001] The invention relates to an unshaped refractory material, in particular to a plastic phase-containing refractory pouring material and a preparation method thereof. Background technique [0002] Compared with qualitative refractory products, unshaped refractory materials represented by refractory castables have the advantages of short process flow, low production energy consumption and cost, convenient use, wide application range, integrity and good use effect, so they are widely used in the world. It has developed rapidly, and its proportion in the whole refractory material is getting higher and higher. In some countries with advanced refractory technology, the output of unshaped refractories has approached or even exceeded the output of shaped products. For example, the current output of unshaped refractory materials in Japan accounts for about 60% of the total refractory materials; in the United States, it is about 50%; in Britain, Germany, Fran...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 廖桂华张国强张玫曹钦存徐国辉陈军武金川
Owner LUOYANG INST OF SCI & TECH
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