Magnesia refractory material and preparation method thereof

A refractory and magnesium technology, applied in the field of refractories, can solve the problems of unstable material structure, low strength of magnesium materials, poor corrosion resistance and acid gas corrosion resistance, etc., and achieves good thermal shock stability and corrosion resistance. Excellent, high temperature resistant performance

Inactive Publication Date: 2015-03-25
WUHAN UNIV OF SCI & TECH
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, adding titanium dioxide can form magnesium titanate with magnesium oxide to promote the densification of the material, and adding aluminum oxide to form aluminum titanate also has a similar effect, but due to the large mixing ratio with magnesium oxide with a large expansion coefficient, the material structure is different. Stable, resulting in problems such as low strength and poor corrosion resistance, especially acid gas corrosion resistance, of magnesium materials

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

[0026] A magnesia refractory material and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0027] Step 1: Mix 35-45wt% talcum powder, 50-60wt% magnesium salt and 3-5wt% surfactant evenly, and ball mill for 1-3 hours to obtain a ball mill.

[0028] The second step is to dry the ball abrasive at 80~105°C for 12~24h, then add 5~10wt% siliceous raw material to the dried ball abrasive, mix evenly, and press it for the first time, and then press it at 600~800 Keep warm for 3~5h under the condition of ℃ to get the calcined material.

[0029] The third step is to crush the calcined material, and then ball mill it until the particle size is less than 0.088mm to obtain powdered abrasive material.

[0030] The fourth step is to use 8~10wt% abrasive powder, 50~60wt% magnesia particles, 20~30wt% magnesia powder and 8~10wt% siliceous raw materials as the mixture, and then add 3~5wt of the mixture % silica sol, mixed evenly, ma...

Embodiment 2

[0034] A magnesia refractory material and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0035] Step 1: Mix 45-55wt% talcum powder, 40-50wt% magnesium salt and 3-5wt% surfactant evenly, and ball mill for 3-5 hours to obtain a ball mill.

[0036] The second step is to dry the ball abrasive at 80~105°C for 12~24h, then add 10~15wt% siliceous raw material to the dried ball abrasive, mix evenly, press for the first time, and then press it at 400~600 Keep warm for 1~3h under the condition of ℃ to get calcined material.

[0037] The third step is to crush the calcined material, and then ball mill it until the particle size is less than 0.088mm to obtain powdered abrasive material.

[0038] The fourth step is to use 5~8wt% powder abrasive, 65~80wt% magnesia particles, 10~25wt% magnesia powder and 5~8wt% siliceous raw materials as the mixture, and then add 1~3wt of the mixture % of silica sol, mixed evenly, machine-pre...

Embodiment 3

[0042] A magnesia refractory material and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0043] Step 1: Mix 55-70wt% talcum powder, 25-40wt% magnesium salt and 3-5wt% surfactant evenly, and ball mill for 1-3 hours to obtain a ball mill.

[0044] The second step is to dry the ball abrasive at 80~105°C for 12~24h, then add 5~10wt% siliceous raw material to the dried ball abrasive, mix evenly, and press it for the first time, and then press it at 600~800 Keep warm for 3~5h under the condition of ℃ to get the calcined material.

[0045] The third step is to crush the calcined material, and then ball mill it until the particle size is less than 0.088mm to obtain powdered abrasive material.

[0046] The fourth step is to use 5~7wt% of powder and abrasive, 50~60wt% of magnesia particles, 25~40wt% of magnesia powder and 5~8wt% of siliceous raw materials as the mixture, and then add 3~5wt of the mixture % silica sol, mi...

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
compressive strengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to a magnesia refractory material and a preparation method thereof. The technical scheme is that the preparation method comprises the following steps: uniformly mixing 35-70wt% of talc powder, 25-60wt% of magnesium salts and 0.1-5wt% of a surfactant, and performing ball milling for 1-5 hours to obtain a ball milling material; drying the ball milling material, additionally adding a silica raw material accounting for 5-15wt% of the dried ball milling material, mixing uniformly, and performing mechanical pressing for the first time; then preserving the heat for 1-5 hours at 400-800 DEG C to obtain a pre-sintered material; crushing the pre-sintered material, and ball-milling the crushed pre-sintered material to have a particle size of less than 0.088mm, thereby obtaining abrasive powder; taking 5-10wt% of the abrasive powder, 50-80wt% of magnesia particles, 10-40wt% of magnesia powder and 5-10wt% of the silica raw material to form a mixed material, additionally adding silica sol accounting for 1-5wt% of the mixed material, mixing uniformly, performing mechanical pressing for the second time, and drying; and finally, firing for 2-6 hours at 1500-1600 DEG C to obtain the magnesia refractory material. The magnesia refractory material prepared by the method provided by the invention has the characteristics of excellent high-temperature resistance, high strength, excellent erosion resistance and high thermal shock stability.

Description

technical field [0001] The invention belongs to the technical field of refractory materials. It specifically relates to a magnesia refractory material and a preparation method thereof. Background technique [0002] Refractories with magnesium oxide as the main component and periclase as the main crystal phase are collectively referred to as magnesia refractories. In addition to the main crystal phase periclase, many magnesia refractory products also contain silicate, spinel or other components. [0003] Magnesia refractories are widely used in metallurgy, cement, glass and other industries due to their high refractoriness and strong corrosion resistance to alkaline slag and iron slag. However, the poor thermal shock resistance and acid gas erosion resistance of magnesia refractories are the main obstacles to their wider application. [0004] Although the currently prepared magnesia refractories have many advantages, they still have certain defects. For example, adding ti...

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): C04B35/66
Inventor 王周福刘江波万俊刘浩王玺堂马妍
Owner WUHAN UNIV OF SCI & TECH
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