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Compact aluminum-magnesium-calcium refractory clinker and preparation method thereof
The invention provides a compact aluminum-magnesium-calcium refractory clinker and a preparation method thereof. The clinker comprises the following components by weight: 74 to 88% of Al2O3, 4 to 14% of MgO, 2 to 8% of CaO and 2 to 5% of MnO. The clinker has a relative density of 91.1 to 95.5% and a water absorption rate of 2.4 to 3.9%. The preparation method for the clinker comprises the following steps: (1) separately levigating bauxite, magnesite and limestone and then carrying out mixing; (2) pressing the mixed materials into a raw ball and then carrying out primary calcination so as to prepare the clinker; (3) levigating the clinker, then adding manganese oxide micropowder, and carrying out pressing to obtain a ball; and (4) carrying out secondary calcination. According to the invention, the manganese oxide micropowder is used as a sintering promoter; and manganese oxide is dissolved into spinel through solid treatment during calcination to form a MgAl2O4-MnO solid solution, so sintering activity of an aluminum-magnesium spinel phase is improved and the growth of the spinel phase is promoted; therefore, the compact aluminum-magnesium-calcium refractory clinker can be obtained under the conditions of low secondary calcination temperature and short heat preserving time, production energy consumption is effectively reduced, and production efficiency is improved.
Compact aluminum-magnesium-calcium refractory clinker and preparation method thereof
The invention provides a compact aluminum-magnesium-calcium refractory clinker and a preparation method thereof. The clinker comprises the following components by weight: 74 to 88% of Al2O3, 4 to 14% of MgO, 2 to 8% of CaO and 2 to 5% of MnO. The clinker has a relative density of 91.1 to 95.5% and a water absorption rate of 2.4 to 3.9%. The preparation method for the clinker comprises the following steps: (1) separately levigating bauxite, magnesite and limestone and then carrying out mixing; (2) pressing the mixed materials into a raw ball and then carrying out primary calcination so as to prepare the clinker; (3) levigating the clinker, then adding manganese oxide micropowder, and carrying out pressing to obtain a ball; and (4) carrying out secondary calcination. According to the invention, the manganese oxide micropowder is used as a sintering promoter; and manganese oxide is dissolved into spinel through solid treatment during calcination to form a MgAl2O4-MnO solid solution, so sintering activity of an aluminum-magnesium spinel phase is improved and the growth of the spinel phase is promoted; therefore, the compact aluminum-magnesium-calcium refractory clinker can be obtained under the conditions of low secondary calcination temperature and short heat preserving time, production energy consumption is effectively reduced, and production efficiency is improved.
Compact aluminum-magnesium-calcium refractory clinker and preparation method thereof
CHEN MIN (author) / YIN XUELIANG (author) / XU LEI (author) / LIU LEI (author) / SHEN XIANG (author) / HE MEILE (author) / ZHANG SHUAI (author)
2015-10-14
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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