The characters of a serial fluidized bed reactor, which was composed of a fast-fluidized bed, turbulent fluidized
bed and fast-fluidized bed in a cold condition were studied to resolve the problems existing in direct-chlorination of titania-en-
riched slag from the refineries in Panzhihua. The velocity of the fast-fluidized bed and concentration, flow pattern and solid resi-
dence time in turbulent fluidized bed were studied. The distribution of axial and radial concentrates of turbulent fluidized bed was
reviewed. The ability of coherence resisting in turbulent fluidized bed was studied too. The degree of scrunch which could express
the extent of coherence resisting was used to character the degree of activity in turbulent fluidized bed reactor. Results showed
that the turbulent fluidized bed has better anti-cohering ability.