Within 70 years after birth of preheater, there are various Preheater and calciner with different shapes and characteristics, which have guided the development of precalcing production technique.

• 在预热器诞生后的70年里,出现了形体各异、技术性能各具特色的预热器和分解炉,主导着新型干法水泥生产技术的发展。