CHARACTERIZATION OF CLINKER PRODUCED BY FLUIDIZED BED ADVANCED CEMENT KILN SYSTEM

Abstract

Fluidized bed Advanced cement Kiln System（FAKS）is an innovative cement manufacturing technology with higher reaction efficiency than any other kiln system. A FAKS plant with the capacity of 1,000 tons/day was constructed by Kawasaki Plant Systems in the International Coal Utilization Project by New Energy and Industrial Technology Development Organization（NEDO）in Shandong Province, China. And its performance tests were conducted. In this study, clinker samples from a FAKS plant were examined by Chemical Analysis, Rietveld Analysis and Optical Microscopy. Moreover, physical tests for cement and tests for slump, air content and compressive strength of concrete were performed to confirm their qualities. As a result, it is clear that clinker produced by FAKS was burned as well as by conventional rotary kiln system, though there are differences in the process of clinker minerals’ formation, burning conditions such as temperature and retention time in the kiln, etc. Compared among the clinker samples from a FAKS plant, there was a significant difference in especially the increase of compressive strength in the long term. It is obvious that the physical property of cement could have been affected by the difference of mineral composition in our tests. In addition, it is possible that it might have been affected by the difference of a melting state of minor constituents such as MgO in clinker minerals.