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Preparation method of microporous magnesium aggregate
A preparation method of microporous magnesium aggregate belongs to the technical field of lightweight aggregate and comprises the following steps: step S1, adding Y2O3 into low-grade natural magnesite fine powder serving as a raw material; s2, adding absolute ethyl alcohol into the raw materials in the step S1, mixing in a planetary ball mill to obtain mixed slurry, and drying the slurry in an air dry oven to obtain mixed powder; s3, the materials mixed in the step S2 are put into a tablet press to be pressed and formed, and a formed green body is dried; and S4, putting the sample dried in the step S3 into a high-temperature furnace for reaction sintering. A magnesite in-situ decomposition pore-forming method is combined with phase reconstruction of low-melting-point minerals in the magnesite, the prepared lightweight aggregate is high in closed porosity, low in apparent porosity and small in average pore size, heat loss can be effectively reduced, and the comprehensive utilization rate of the low-grade magnesite is increased.
一种微孔镁质骨料的制备方法，属于轻质骨料技术领域，包括如下步骤：步骤S1、以低品位天然菱镁矿细粉为原料，加入Y2O3；步骤S2、在步骤S1中的原料加入无水乙醇，在行星式球磨机中混合，得到混合料泥浆，将浆料置于鼓风干燥箱中干燥，得到混合后的粉料；步骤S3、将步骤S2中混合好的物料放入压片机中压制成型，将成型后的坯体干燥；步骤S4、将步骤S3中干燥后的试样置入高温炉中反应烧结。本发明以菱镁矿原位分解造孔法和对菱镁矿中低熔点矿物相重构相结合，制备的轻质骨料闭口气孔率高、显气孔率低、平均孔径小，可以有效地减少热损失提高了低品位菱镁矿的综合利用率。
Preparation method of microporous magnesium aggregate
A preparation method of microporous magnesium aggregate belongs to the technical field of lightweight aggregate and comprises the following steps: step S1, adding Y2O3 into low-grade natural magnesite fine powder serving as a raw material; s2, adding absolute ethyl alcohol into the raw materials in the step S1, mixing in a planetary ball mill to obtain mixed slurry, and drying the slurry in an air dry oven to obtain mixed powder; s3, the materials mixed in the step S2 are put into a tablet press to be pressed and formed, and a formed green body is dried; and S4, putting the sample dried in the step S3 into a high-temperature furnace for reaction sintering. A magnesite in-situ decomposition pore-forming method is combined with phase reconstruction of low-melting-point minerals in the magnesite, the prepared lightweight aggregate is high in closed porosity, low in apparent porosity and small in average pore size, heat loss can be effectively reduced, and the comprehensive utilization rate of the low-grade magnesite is increased.
一种微孔镁质骨料的制备方法，属于轻质骨料技术领域，包括如下步骤：步骤S1、以低品位天然菱镁矿细粉为原料，加入Y2O3；步骤S2、在步骤S1中的原料加入无水乙醇，在行星式球磨机中混合，得到混合料泥浆，将浆料置于鼓风干燥箱中干燥，得到混合后的粉料；步骤S3、将步骤S2中混合好的物料放入压片机中压制成型，将成型后的坯体干燥；步骤S4、将步骤S3中干燥后的试样置入高温炉中反应烧结。本发明以菱镁矿原位分解造孔法和对菱镁矿中低熔点矿物相重构相结合，制备的轻质骨料闭口气孔率高、显气孔率低、平均孔径小，可以有效地减少热损失提高了低品位菱镁矿的综合利用率。
Preparation method of microporous magnesium aggregate
一种微孔镁质骨料的制备方法
22.08.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
Microporous periclase-magnesium aluminate spinel refractory aggregate and preparation method thereof
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