The application discloses
high calcium expanded clinker which can be continuously produced on a
rotary kiln and a preparation method thereof. The
high calcium expanded clinker is prepared from raw
meal powder of 70-90 parts of limestone, 8-24 parts of lapis lazuli and 2-6 parts of
aluminum fluoride by calcining at 1200-1300 DEG C on a
rotary kiln. The application uses lapis lazuli which is not easy to decompose and rich in
sulfur minerals to replace
gypsum commonly used in traditional expanded clinker as a
sulfur component. With the aid of the mineralization component of
aluminum fluoride, the application reduces the risk of ring formation in the
kiln caused by the volatilization and condensation of SO3 generated by the
decomposition of
gypsum on the basis of providing a
sulfur phase
station, significantly improves the continuity of the
calcination production of the expanded clinker on the
rotary kiln, greatly ensures the
production quality of the expanded clinker, reduces the
sintering heat consumption of the expanded clinker, saves the production cost of the expanded clinker, improves the market competitiveness of the expanded clinker, and has a wide application prospect.