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Light-weight equal-diameter micro-porous corundum complex-phase sphere and preparation method thereof

An equal-diameter, micro-porous technology, applied in the field of micro-diameter and micro-porous corundum composite balls and its preparation, can solve the problems of light-weight materials that are difficult to meet the requirements, many slag diffusion channels, and complex slag erosion process, etc., and achieve thermal shock stability Good performance, strong resistance to slag erosion, and low bulk density

Active Publication Date: 2016-01-13
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low bulk density and more pores of the current lightweight refractory materials, compared with ordinary refractory materials, the slag diffusion channels are more, and the slag erosion process is more complicated
Therefore, lightweight refractory materials are required to have more micro-closed pores and the ability to form a slag-resistant protective layer under a wide range of slag composition conditions, but the lightweight materials currently reported are still difficult to meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A lightweight and micro -holes of the micro -holes and the preparation method.With 90 ~ 93WT%α-al 2 O 3 Micro powder and 7 ~ 10WT%MGO micro powder are raw materials, which account for 5 ~ 10WT%of the ingredients of the raw material, and mix 0.05 ~ 0.4 hours with a planet ball mill;, That is to have a prefabricated ball.

[0027] Alumina solidaries and 铝-Al 2 O 3 Micro powder is based on the quality ratio (0.04 ~ 0.07): 1 Mix into a pulp, and then spray the pulp evenly on the surface of the prefabricated ball.~ 0.12): 1; then dry for 24 ~ 36 hours under the conditions of 110 ~ 160 ℃, and burned for 3 to 5 hours under the condition of ultra -high temperature vertical kiln at 1900 ~ 2000 ° C, that is, lightweight and micro -holes of micro -holes.Essence

[0028] The lightweight equal diameter of the macro -holes prepared by this embodiment is detected: the volume density is 2.75 ~ 2.8g / cm 3 The proportion of the stomach rate of closed mouth is> 63%, and the average average hol...

Embodiment 2

[0030] A lightweight and micro -holes of the micro -holes and the preparation method.With 90 ~ 93WT%γ-al 2 O 3 Micro powder and 7 ~ 10WT%MGO micro powder are raw materials, which account for 10 ~ 15WT%of the starch of raw materials, mixing 0.4 ~ 0.8 hours with planet ball mills;That is to have a prefabricated ball.

[0031] Alumina solidaries and 铝-Al 2 O 3 Micro powder is based on the quality ratio (0.07 ~ 0.1): 1 mixes into a pulp, and then spray the pulp evenly on the surface of the prefabricated ball.~ 0.09): 1; then dry for 12 ~ 24 hours under the condition of 150 ~ 200 ℃, and burned for 2 to 4 hours under the condition of ultra -high temperature vertical kiln at 2000 ~ 2100 ° C, that is, lightweight and micro -holes of the micro -pores.Essence

[0032] The lightweight equal diameter of the micro -holes prepared by this embodiment is detected: the volume density is 2.7 ~ 2.75g / cm 3 The proportion of the stomach rate of closed mouth is> 60%, and the average average hole diamet...

Embodiment 3

[0034] A lightweight and micro -holes of the micro -holes and the preparation method.With 92 ~ 95WT%α-al 2 O 3 Micro powder and 5 ~ 8WT%MGO micro powder are raw materials, which account for 5 ~ 10WT%of the raw material as described by the planet, and mix 0.05 ~ 0.4 hours with a planet ball mill;, That is to have a prefabricated ball.

[0035] Alumina solidaries and 铝-Al 2 O 3 Micro powder is based on the quality ratio (0.04 ~ 0.07): 1 Mix into a pulp, and then spray the pulp evenly on the surface of the prefabricated ball.~ 0.12): 1; then dry for 24 ~ 36 hours under the conditions of 110 ~ 160 ℃, and burned for 3 to 5 hours under the condition of ultra -high temperature vertical kiln at 1900 ~ 2000 ° C, that is, lightweight and micro -holes of micro -holes.Essence

[0036] The lightweight equal diameter of the macro -holes prepared by this embodiment is detected: the volume density is 2.75 ~ 2.88g / cm 3 The proportion of the stomach rate of the closed mouth is> 65%, and the average a...

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Abstract

The invention relates to a light-weight equal-diameter micro-porous corundum complex-phase sphere and a preparation method thereof. The preparation method includes the following steps: (A) employing 90-99 wt% of Al2O3 micro-powder and 1-10 wt% of MgO micro-powder as raw materials, adding a saccharide polymer accounting for 5-15 wt% of the raw materials, and mixing the components in a planetary ball mill; (B) adding water accounting for 6-20 wt% of the raw materials, performing rotary granulation to obtain pre-fabricated spheres; (C) mixing aluminum oxide sol and [rho]-Al2O3 micro powder according to mass ratio of (0.04-0.1):1 to prepare slurry, spraying the slurry uniformly onto the surfaces of the pre-fabricated spheres, wherein a ratio of the thickness of the slurry sprayed onto the surfaces of the pre-fabricated spheres to the radials of the pre-fabricated spheres is (0.05-0.12):1; and (D) drying the spheres and calcining the spheres at 1900-2100 DEG C for 2-5 h in an ultrahigh-temperature vertical kiln to prepare the light-weight equal-diameter micro-porous corundum complex-phase sphere. The light-weight equal-diameter micro-porous corundum complex-phase sphere is low in volume density and is less in average pore diameter, is high in closed porosity, is low in heat conductivity, is good in thermal shock stability, is washing-resistant and is strong in anti-slag-erosion capability.

Description

Technical field [0001] The present invention belongs to the technology field of Gang Jade refractory material.Specifically involves a lightweight and micro -holes, and the preparation method. Background technique [0002] The refractory materials are directly used in the process of steel, non -ferrous, cement, glass, ceramics and chemicals, machinery, and electricity in various fields of national economies. It is an indispensable basic material for ensuring the operation and technology development of the above industries.In recent years, energy conservation and consumption reduction have become one of the important directions of high -temperature industry. Thermal insulation materials have developed rapidly, and lightweight high -temperature industrial lining has attracted more and more attention.However, refractory materials are both lining materials and also participating in high temperature processes. The damage during service is mainly manifested in the erosion and destructio...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/634
Inventor 顾华志付绿平黄奥张美杰李楠
Owner WUHAN UNIV OF SCI & TECH
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