Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Aorthite lightweight refractory material with uniform pores and preparation method thereof

A lightweight refractory material and anorthite technology, applied in the field of refractory materials, can solve the problems of inability to operate continuously, difficult to control the size of pores, unsatisfactory thermal insulation effect, etc. Evenly distributed effect

Active Publication Date: 2022-03-18
山东鲁阳浩特高技术纤维有限公司
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the preparation process of traditional refractory materials (especially refractory bricks), there is often the problem of uncontrollable volume density, which makes the thermal insulation effect of the product unsatisfactory
Moreover, the existing preparation process cannot be operated continuously, and the size of the pores is difficult to control

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Aorthite lightweight refractory material with uniform pores and preparation method thereof
  • Aorthite lightweight refractory material with uniform pores and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The invention provides a method for preparing an anorthite lightweight refractory material with uniform pores, comprising the following steps:

[0026] A) ball milling 48 to 55 wt% of coal gangue and 4.5 to 6.5 wt% of pyrophyllite to obtain a ball mill slurry;

[0027] B) stirring and mixing the ball mill material, 10-14.5wt% refractory clay and 9.5-15.5wt% calcium carbonate to obtain the main ingredient mixture;

[0028] C) mixing the main material mixture, 5-10wt% high alumina cement and 6-20wt% additives (additional) to obtain a castable;

[0029] Al in the high alumina cement 2 o 3 Content > 67wt%;

[0030] D) Casting the castable into a mold, followed by drying and roasting after demoulding to obtain an anorthite lightweight refractory material.

[0031] In the present invention, the coal gangue can increase the aluminum content during the roasting process, further helping to reduce the thermal conductivity. The mass fraction of the gangue is preferably 48-55w...

Embodiment 1

[0054] Add refractory powder (54wt% coal gangue and 7wt% pyrophyllite) into a ball mill for ball milling for 6 hours until the mesh size reaches 2000 mesh.

[0055] The slurry completed by ball milling is discharged and placed in the storage tank for standby.

[0056] Stir once, extract the ball mill slurry from the stock tank and stir simultaneously with 15wt% refractory clay and 14wt% calcium carbonate for 12min, and control the temperature of the slurry below 40°C;

[0057] Secondary stirring: add 10wt% high alumina cement and 8wt% coagulant (additional) and other auxiliary materials at the same time and stir for 10 minutes. After the stirring is completed, add 6wt% cement foaming agent (additional) and stir for 30s, let it fully stir to make the bubbles more uniform .

[0058] 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] Static maintenance: The solidification time of the ...

Embodiment 2

[0066] Add refractory powder (55wt% coal gangue and 7wt% pyrophyllite) into a ball mill for ball milling for 6 hours until the mesh size reaches 2000 mesh.

[0067] The slurry completed by ball milling is discharged and placed in the storage tank for standby.

[0068] Stir once, extract the ball mill slurry from the stock tank and stir simultaneously with 15wt% refractory clay and 14wt% calcium carbonate for 12min, and control the temperature of the slurry below 40°C;

[0069] Secondary stirring: add 9wt% high-alumina cement and 8wt% coagulant (additional) and other auxiliary materials at the same time and stir for 10 minutes. After the stirring is completed, add 6wt% cement foaming agent (additional) 80L and stir for 25s, let it fully stir to make the bubbles more uniform.

[0070] Quantitative pouring: 28 molds are poured at one time, the pouring time is 8 minutes, and the indoor temperature is controlled at 25°C.

[0071] Static maintenance: The solidification time of the...

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
pore sizeaaaaaaaaaa
melting pointaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention provides an anorthite lightweight refractory material with uniform pores and a preparation method thereof.The mixing sequence of different raw materials is adjusted, coal gangue powder and pyrophyllite are added firstly, then refractory clay and calcium carbonate are added, and finally high-alumina cement, a coagulation accelerator and a foaming agent are added, so that the state of slurry can be effectively adjusted, and the uniform-pore anorthite lightweight refractory material is prepared. And bubbles of the slurry are distributed more uniformly in a cast blank, so that the heat conductivity coefficient of a product is reduced. Test results show that the heat conductivity coefficient of the anorthite lightweight refractory material is reduced from 0.18 W / (m.K) to 0.12 W / (m.K), the strength of a wet blank is improved from 0.1 MPa to 0.4 MPa, and the forming qualification rate of the wet blank is improved. The volume weight is controlled to be 450-530 kg / m < 3 >, and the product percent of pass is increased to 96% from 87% and is increased by 9%.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to an anorthite lightweight refractory material with uniform pores and a preparation method thereof. Background technique [0002] Anorthite refractory materials (especially refractory bricks) have high porosity, low bulk density, and good thermal insulation performance, 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] In the preparation proc...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B33/132
CPCC04B35/66C04B33/132C04B2235/3481C04B2235/6567C04B2235/661C04B2235/96C04B2235/9607Y02P40/60
Inventor 周生岳耀辉刘超郭金胜谢宜张成娟
Owner 山东鲁阳浩特高技术纤维有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com