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A platform for research: civil engineering, architecture and urbanism
Processing technology of high-thermal-shock low-creep corundum
The invention provides a processing technology of high-thermal-shock low-creep corundum, which comprises the following steps: a raw material treatment step: crushing alumina powder, and carrying out primary impurity removal, rinsing and primary drying on the crushed alumina powder to form an intermediate material; a mother ball growth step: placing the intermediate material in a mother ball forming mill to grow into a mother ball, and placing the mother ball in a mother ball forming mill to continuously grow into the mother ball; a sintering material preparation step: placing the mother balls in a drying oven for secondary drying to form a sintering material; a sintering step: feeding the sintered material into a vertical sintering furnace for calcining, and changing the crystal phase structure of the sintered material to form tabular corundum; and a crushing and screening step, namely crushing the tabular corundum, performing secondary impurity removal, and packaging and storing according to the particle size. According to microscopic observation, the prepared corundum has fewer impurities at the grain boundary, the crystals are more fully combined, and the microcracks on the surfaces of the crystals are few, so that the thermal shock stability and creep resistance of the sintered tabular corundum are effectively improved.
本发明提供了一种高热震低蠕变刚玉加工工艺，原料处理步骤，将氧化铝粉粉碎，并对其进行一次除杂，漂洗和一次烘干后形成中间料；母球生长步骤，将所述中间料置于种球成球机中成长为种球后，将所述种球置于母球成球机中继续长大为母球；烧结料预备步骤，将所述母球置于干燥箱内进行二次烘干，形成烧结料；烧结步骤，将所述烧结料送入立式烧结炉中煅烧，改变其晶相结构，形成板状刚玉；粉碎筛选步骤，将板状刚玉进行粉碎，二次除杂后按粒径大小包装存储，完毕。制得的刚玉经显微观测其晶界处杂质更少，晶体之间结合的更加充分，晶体表面微裂纹少，从而致使烧结板状刚玉的热震稳定性和抗蠕变性得到有效提高。
Processing technology of high-thermal-shock low-creep corundum
The invention provides a processing technology of high-thermal-shock low-creep corundum, which comprises the following steps: a raw material treatment step: crushing alumina powder, and carrying out primary impurity removal, rinsing and primary drying on the crushed alumina powder to form an intermediate material; a mother ball growth step: placing the intermediate material in a mother ball forming mill to grow into a mother ball, and placing the mother ball in a mother ball forming mill to continuously grow into the mother ball; a sintering material preparation step: placing the mother balls in a drying oven for secondary drying to form a sintering material; a sintering step: feeding the sintered material into a vertical sintering furnace for calcining, and changing the crystal phase structure of the sintered material to form tabular corundum; and a crushing and screening step, namely crushing the tabular corundum, performing secondary impurity removal, and packaging and storing according to the particle size. According to microscopic observation, the prepared corundum has fewer impurities at the grain boundary, the crystals are more fully combined, and the microcracks on the surfaces of the crystals are few, so that the thermal shock stability and creep resistance of the sintered tabular corundum are effectively improved.
本发明提供了一种高热震低蠕变刚玉加工工艺，原料处理步骤，将氧化铝粉粉碎，并对其进行一次除杂，漂洗和一次烘干后形成中间料；母球生长步骤，将所述中间料置于种球成球机中成长为种球后，将所述种球置于母球成球机中继续长大为母球；烧结料预备步骤，将所述母球置于干燥箱内进行二次烘干，形成烧结料；烧结步骤，将所述烧结料送入立式烧结炉中煅烧，改变其晶相结构，形成板状刚玉；粉碎筛选步骤，将板状刚玉进行粉碎，二次除杂后按粒径大小包装存储，完毕。制得的刚玉经显微观测其晶界处杂质更少，晶体之间结合的更加充分，晶体表面微裂纹少，从而致使烧结板状刚玉的热震稳定性和抗蠕变性得到有效提高。
Processing technology of high-thermal-shock low-creep corundum
一种高热震低蠕变刚玉加工工艺
ZHANG HENGWANG (author) / HUA ZHIGAO (author) / CAO CHAO (author)
2021-05-28
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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