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Low-thermal-conductivity sintered corundum refractory aggregate and preparation method thereof
The invention discloses a preparation method of low-thermal-conductivity sintered corundum refractory aggregate, which comprises the following steps: adding 0.5-1.5 parts by mass of nano carbon material particles into 100 parts by mass of ammonia water solution, and carrying out ultrasonic dispersion to obtain nano carbon material suspension; under a water bath condition, dropwise adding the nano carbon material suspension into an aluminum salt solution, uniformly stirring, aging, performing centrifugal separating, and performing drying and low-temperature heat treatment on a centrifugal product to prepare nano core-shell structure particles; and using the industrial alumina micro powder and the nano core-shell structure particles as raw materials, placing in a rotary ball forming mill to prepare spherical particles, drying the spherical particles, and then allowing the spherical particles to be subjected to heat treatment to obtain the low-thermal-conductivity sintered corundum refractory aggregate. The low-thermal-conductivity sintered corundum refractory aggregate prepared by the invention has the characteristics of low apparent porosity, a large number of nano closed pores, adjustable pore diameter and porosity, low thermal conductivity and strong slag resistance.
本发明公开了一种低导热烧结刚玉耐火骨料的制备方法，包括以下步骤：将0.5‑1.5质量份的纳米碳材料颗粒加入到100质量份的氨水溶液中，超声分散得到纳米碳材料悬浮液；在水浴条件下，将纳米碳材料悬浮液逐滴加入至铝盐溶液中，搅拌均匀，陈化后离心分离，将离心产物经干燥和低温热处理，制得纳米核壳结构颗粒；以工业氧化铝微粉和纳米核壳结构颗粒为原料置于旋转成球机中制得球形颗粒，烘干后热处理，即得低导热烧结刚玉耐火骨料。本发明所制备的低导热烧结刚玉耐火骨料具有显气孔率低、含大量纳米封闭气孔、孔径及气孔率可调控、热导率较低和抗熔渣能力强的特点。
Low-thermal-conductivity sintered corundum refractory aggregate and preparation method thereof
The invention discloses a preparation method of low-thermal-conductivity sintered corundum refractory aggregate, which comprises the following steps: adding 0.5-1.5 parts by mass of nano carbon material particles into 100 parts by mass of ammonia water solution, and carrying out ultrasonic dispersion to obtain nano carbon material suspension; under a water bath condition, dropwise adding the nano carbon material suspension into an aluminum salt solution, uniformly stirring, aging, performing centrifugal separating, and performing drying and low-temperature heat treatment on a centrifugal product to prepare nano core-shell structure particles; and using the industrial alumina micro powder and the nano core-shell structure particles as raw materials, placing in a rotary ball forming mill to prepare spherical particles, drying the spherical particles, and then allowing the spherical particles to be subjected to heat treatment to obtain the low-thermal-conductivity sintered corundum refractory aggregate. The low-thermal-conductivity sintered corundum refractory aggregate prepared by the invention has the characteristics of low apparent porosity, a large number of nano closed pores, adjustable pore diameter and porosity, low thermal conductivity and strong slag resistance.
本发明公开了一种低导热烧结刚玉耐火骨料的制备方法，包括以下步骤：将0.5‑1.5质量份的纳米碳材料颗粒加入到100质量份的氨水溶液中，超声分散得到纳米碳材料悬浮液；在水浴条件下，将纳米碳材料悬浮液逐滴加入至铝盐溶液中，搅拌均匀，陈化后离心分离，将离心产物经干燥和低温热处理，制得纳米核壳结构颗粒；以工业氧化铝微粉和纳米核壳结构颗粒为原料置于旋转成球机中制得球形颗粒，烘干后热处理，即得低导热烧结刚玉耐火骨料。本发明所制备的低导热烧结刚玉耐火骨料具有显气孔率低、含大量纳米封闭气孔、孔径及气孔率可调控、热导率较低和抗熔渣能力强的特点。
Low-thermal-conductivity sintered corundum refractory aggregate and preparation method thereof
一种低导热烧结刚玉耐火骨料及其制备方法
FU LYUPING (author) / TANG SHAOPENG (author) / GU HUAZHI (author) / HUANG AO (author) / ZHANG MEIJIE (author)
2021-08-06
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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