Mullite silicon carbide composite brick with low thermal conductivity and preparation method thereof

A technology of mullite silicon carbide and low thermal conductivity, applied in the field of refractory materials, can solve the problems of rotary kiln shell deformation, high thermal conductivity, energy waste, etc., achieve reduced thermal conductivity and bulk density, excellent performance, and good use effect Effect

Inactive Publication Date: 2016-02-03
TONGDA REFRACTORY TECH CO LTD +1
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to overcome the defects existing in the existing traditional magnesia-alumina-spinel refractory materials used in rotary kilns, the present invention provides a new low thermal conductivi

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The low thermal conductivity mullite silicon carbide composite brick of the present invention is represented by weight percentage, and the raw material composition is: mullite homogeneous material 20%, high alumina bauxite clinker 45%, silicon carbide 15%, alumina hollow ball 15% %, Guangxi white mud 5%; plus pulp waste liquid accounting for 3% of the total weight of the above-mentioned various raw materials;

[0033] The 20% mullite homogeneous material is prepared from mullite homogeneous materials with three particle sizes of 3mm≤particle size<5mm, 1mm≤particle size<3mm and <1mm according to the mass ratio of 1:2:0.8;

[0034] The 45% high alumina bauxite clinker is composed of high alumina bauxite clinker with four particle sizes of 3mm≤particle size<5mm, 1mm≤particle size<3mm, 0.074mm≤particle size<1mm and <0.074mm according to the mass ratio 1:2:2:2 formulated.

Embodiment 2

[0036] The preparation method of embodiment 1 of the present invention low heat conduction mullite silicon carbide composite brick, its detailed steps are as follows:

[0037] a, material preparation: first prepare materials according to the ratio of each raw material described in Example 1, prepare mullite homogeneous materials with three particle sizes of 3mm≤particle size<5mm, 1mm≤particle size<3mm and <1mm, 3mm≤particle size High alumina bauxite clinker with diameter<5mm, 1mm≤particle size<3mm, 0.074mm≤particle size<1mm and <0.074mm, silicon carbide with particle size<0.074mm, alumina hollow ball with particle size<0.5mm , Guangxi white mud and pulp waste liquor with a particle size of <0.044mm;

[0038]b. Mixing: Mix the mullite homogeneous material prepared in step a with three particle sizes of 3mm≤particle size<5mm, 1mm≤particle size<3mm and <1mm, 3mm≤particle size<5mm, 1mm≤particle size<3mm and high-alumina bauxite clinker of three particle sizes of 0.074mm≤particle ...

Embodiment 3

[0044] The low thermal conductivity mullite silicon carbide composite brick of the present invention is represented by weight percentage, and the raw material composition is: mullite homogeneous material 40%, high alumina bauxite clinker 33%, silicon carbide 12%, alumina hollow ball 10% %, Guangxi white mud 5%; plus pulp waste liquid accounting for 3% of the total weight of the above-mentioned various raw materials;

[0045] The 40% mullite homogeneous material is prepared from mullite homogeneous materials with three particle sizes of 3mm≤particle size<5mm, 1mm≤particle size<3mm and <1mm according to the mass ratio of 1:3:0.5;

[0046] The 33% high alumina bauxite clinker is composed of high alumina bauxite clinker with four particle sizes of 3mm≤particle size<5mm, 1mm≤particle size<3mm, 0.074mm≤particle size<1mm and <0.074mm according to the mass ratio 1:3:1:3 formulated.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Granularityaaaaaaaaaa
Bulk densityaaaaaaaaaa
Bulk densityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a mullite silicon carbide composite brick with low thermal conductivity and a preparation method thereof. The composite brick is prepared from the following raw materials in percentage by weight: 20 to 60 percent of mullite homogenized grogs, 20 to 45 percent of bauxite chamotte, 10 to 20 parts of silicon carbide, 5 to 15 parts of alumina hollow ball, 3 to 8 parts of Guangxi white clay, and with the addition of waste paper pulp accounting for 2 to 5 percent of the total weight of the raw materials. The preparation method comprises the steps that firstly mixing and grinding are performed on all the materials; the obtained mixture is subjected to compression moulding to obtain a green brick; the obtained green brick is subjected to drying, sintering, finally cooling and taking out of a kiln so as to obtain a product. According to the composite brick disclosed by the invention, the difficulties of rotary kiln cylinder body deformation caused by higher thermal conductivity causing the high temperature of the cylinder body and energy waste can be solved. The mullite silicon carbide composite brick disclosed by the invention has the characteristics of low heat conduction, thermostability, anti-erosion, anti-scouring and the like, and is used for multiple rotary kilns in China, which proves that the using effect is good.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a mullite silicon carbide composite brick with low thermal conductivity and a preparation method thereof. Background technique [0002] Using rotary kiln as a high-temperature kiln to produce refractory raw materials and dispose of waste is currently the most common, economical and environmentally friendly production process. This process has the characteristics of strong raw material adaptability and high resource recovery rate. However, due to the high temperature in the high temperature zone of the rotary kiln, some materials are in a semi-molten or fully molten state, resulting in high slag content, large fluctuations, and low viscosity, resulting in a very harsh working environment for refractory materials in the kiln, and the performance of refractory materials has also been raised. higher requirement. Due to the high thermal conductivity of tradit...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C04B35/66
Inventor 马淑龙张积礼高长贺张德义王浩杰王治峰夏文斌马飞朱凌云吕雪锋李冉柴国彦曲睿磊
Owner TONGDA REFRACTORY TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap