Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-thermal-shock low-carbon magnesia spinel brick and preparation method thereof
The invention provides a high-thermal-shock low-carbon magnesia spinel brick and a preparation method thereof. The high-thermal-shock low-carbon magnesia spinel brick is prepared from the following components in percentage by mass: 90 to 95 percent of MgO; 4%-10% of Al2O3; c is 1%-5%; and the balance of Cr-free components. The preparation method comprises the following steps: a) mixing macrocrystalline magnesia, magnesium aluminate spinel micro powder, graphite, aluminum-silicon alloy powder and phenolic resin to obtain mixed pug; and b) carrying out compression molding on the mixed pug obtained in the step a), and drying to obtain the high-thermal-shock low-carbon magnesia spinel brick. According to the high-thermal-shock low-carbon magnesium spinel brick for the RH furnace vacuum tank, the preparation process is simple and efficient, the high-temperature sintering process is avoided, meanwhile, the prepared high-thermal-shock low-carbon magnesium spinel brick does not contain chromium and does not pollute the environment, graphite wraps the surface of spinel micro powder, the density of a brick body is increased, the overall heat conductivity coefficient is also increased, and the thermal shock resistance of the brick is improved. Therefore, the abnormal spalling phenomenon of the brick body in the high-temperature service process is reduced, the service life is long, and the cost is low.
本发明提供了一种高热震低碳镁尖晶石砖及其制备方法；所述高热震低碳镁尖晶石砖由以下质量百分比组分组成：MgO 90％～95％；Al2O3 4％～10％；C 1％～5％；余量的不含Cr组分。制备方法包括以下步骤：a)将大结晶镁砂、镁铝尖晶石微粉、石墨、铝硅合金粉和酚醛树脂混合，得到混合泥料；b)将步骤a)得到的混合泥料进行压制成型后干燥，得到高热震低碳镁尖晶石砖。本发明提供的用于RH炉真空槽的高热震低碳镁尖晶石砖，制备过程简单、高效，免了高温烧结过程，同时制备得到的高热震低碳镁尖晶石砖中不含铬元素，无环境污染，而石墨包裹在尖晶石微粉表面，不仅增加砖体致密度，还提高了整体导热系数，从而减少了砖体高温服役过程中异常剥落现象，长寿命且成本低廉。
High-thermal-shock low-carbon magnesia spinel brick and preparation method thereof
The invention provides a high-thermal-shock low-carbon magnesia spinel brick and a preparation method thereof. The high-thermal-shock low-carbon magnesia spinel brick is prepared from the following components in percentage by mass: 90 to 95 percent of MgO; 4%-10% of Al2O3; c is 1%-5%; and the balance of Cr-free components. The preparation method comprises the following steps: a) mixing macrocrystalline magnesia, magnesium aluminate spinel micro powder, graphite, aluminum-silicon alloy powder and phenolic resin to obtain mixed pug; and b) carrying out compression molding on the mixed pug obtained in the step a), and drying to obtain the high-thermal-shock low-carbon magnesia spinel brick. According to the high-thermal-shock low-carbon magnesium spinel brick for the RH furnace vacuum tank, the preparation process is simple and efficient, the high-temperature sintering process is avoided, meanwhile, the prepared high-thermal-shock low-carbon magnesium spinel brick does not contain chromium and does not pollute the environment, graphite wraps the surface of spinel micro powder, the density of a brick body is increased, the overall heat conductivity coefficient is also increased, and the thermal shock resistance of the brick is improved. Therefore, the abnormal spalling phenomenon of the brick body in the high-temperature service process is reduced, the service life is long, and the cost is low.
本发明提供了一种高热震低碳镁尖晶石砖及其制备方法；所述高热震低碳镁尖晶石砖由以下质量百分比组分组成：MgO 90％～95％；Al2O3 4％～10％；C 1％～5％；余量的不含Cr组分。制备方法包括以下步骤：a)将大结晶镁砂、镁铝尖晶石微粉、石墨、铝硅合金粉和酚醛树脂混合，得到混合泥料；b)将步骤a)得到的混合泥料进行压制成型后干燥，得到高热震低碳镁尖晶石砖。本发明提供的用于RH炉真空槽的高热震低碳镁尖晶石砖，制备过程简单、高效，免了高温烧结过程，同时制备得到的高热震低碳镁尖晶石砖中不含铬元素，无环境污染，而石墨包裹在尖晶石微粉表面，不仅增加砖体致密度，还提高了整体导热系数，从而减少了砖体高温服役过程中异常剥落现象，长寿命且成本低廉。
High-thermal-shock low-carbon magnesia spinel brick and preparation method thereof
一种高热震低碳镁尖晶石砖及其制备方法
SUN CHUNYANG (Autor:in) / LIU YU (Autor:in) / ZENG LIMIN (Autor:in) / LIU LIHUA (Autor:in)
24.11.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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