A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Lightweight periclase-spinel aggregate and preparation method thereof
The invention particularly relates to a lightweight periclase-spinel aggregate and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: taking 50.0-90.0 wt% of light calcined magnesia fine powder and 10.0-50.0 wt% of aluminum hydroxide fine powder as raw materials, adding 2.0-5.0 wt% of nickel oxide fine powder and 2.5-5.0 wt% of polyvinyl alcohol, uniformly stirring, carrying out mechanical pressing, and drying; and carrying out heat preservation for 1-3 hours at the temperature of 500-1000 DEG C, then carrying out heat preservation for 1-4 hours at the temperature of 1400-1600 DEG C, cooling, crushing, screening and packaging to obtain the lightweight periclase-spinel aggregate. According to the technical scheme, the particle size of the light calcined magnesia fine powder is smaller than 10 microns; the particle size of the aluminum hydroxide fine powder is 500-800 [mu] m; the particle size of the nickel oxide fine powder is smaller than 10 micrometers. The lightweight periclase-spinel aggregate prepared by the invention has the characteristics of high closed porosity, small pore size, high strength, excellent erosion resistance and low heat conductivity coefficient.
本发明具体涉及一种轻量方镁石‑尖晶石骨料及其制备方法。其技术方案是：以50.0～90.0wt％的轻烧氧化镁细粉和10.0～50.0wt％的氢氧化铝细粉为原料，外加所述原料2.0～5.0wt％的氧化镍细粉和2.5～5.0wt％的聚乙烯醇，搅拌均匀，机压成型，干燥；然后于500～1000℃条件下保温1～3小时，再于1400～1600℃条件下保温1～4小时，冷却，破碎，筛分，包装，制得轻量方镁石‑尖晶石骨料。本技术方案中：所述轻烧氧化镁细粉的粒径＜10μm；所述氢氧化铝细粉的粒径为500～800μm；所述氧化镍细粉的粒径＜10μm。本发明制备的轻量方镁石‑尖晶石骨料具有闭气孔率高、气孔尺寸小、强度高、抗侵蚀性能优良和导热系数低的特点。
Lightweight periclase-spinel aggregate and preparation method thereof
The invention particularly relates to a lightweight periclase-spinel aggregate and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: taking 50.0-90.0 wt% of light calcined magnesia fine powder and 10.0-50.0 wt% of aluminum hydroxide fine powder as raw materials, adding 2.0-5.0 wt% of nickel oxide fine powder and 2.5-5.0 wt% of polyvinyl alcohol, uniformly stirring, carrying out mechanical pressing, and drying; and carrying out heat preservation for 1-3 hours at the temperature of 500-1000 DEG C, then carrying out heat preservation for 1-4 hours at the temperature of 1400-1600 DEG C, cooling, crushing, screening and packaging to obtain the lightweight periclase-spinel aggregate. According to the technical scheme, the particle size of the light calcined magnesia fine powder is smaller than 10 microns; the particle size of the aluminum hydroxide fine powder is 500-800 [mu] m; the particle size of the nickel oxide fine powder is smaller than 10 micrometers. The lightweight periclase-spinel aggregate prepared by the invention has the characteristics of high closed porosity, small pore size, high strength, excellent erosion resistance and low heat conductivity coefficient.
本发明具体涉及一种轻量方镁石‑尖晶石骨料及其制备方法。其技术方案是：以50.0～90.0wt％的轻烧氧化镁细粉和10.0～50.0wt％的氢氧化铝细粉为原料，外加所述原料2.0～5.0wt％的氧化镍细粉和2.5～5.0wt％的聚乙烯醇，搅拌均匀，机压成型，干燥；然后于500～1000℃条件下保温1～3小时，再于1400～1600℃条件下保温1～4小时，冷却，破碎，筛分，包装，制得轻量方镁石‑尖晶石骨料。本技术方案中：所述轻烧氧化镁细粉的粒径＜10μm；所述氢氧化铝细粉的粒径为500～800μm；所述氧化镍细粉的粒径＜10μm。本发明制备的轻量方镁石‑尖晶石骨料具有闭气孔率高、气孔尺寸小、强度高、抗侵蚀性能优良和导热系数低的特点。
Lightweight periclase-spinel aggregate and preparation method thereof
一种轻量方镁石-尖晶石骨料及其制备方法
XU YIBIAO (author) / WANG ZIKANG (author) / LI YAWEI (author) / YAN WEN (author) / SANG SHAOBAI (author)
2024-12-06
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2024
Lightweight periclase-magnesium aluminate spinel refractory material and preparation method thereof
| European Patent Office | 2024
Microporous periclase-magnesium aluminate spinel refractory aggregate and preparation method thereof
| European Patent Office | 2024
| European Patent Office | 2024
| European Patent Office | 2024