The characteristics of circulation of slurry suspension by bubble-agitation in a bubble column with a draft tube have been studied in a 8.90cm I.D.×150cm high acryl column. The circulation time and the degree of dis-persion of fluid were measured by the analysis of Residence Time Distribution which were obtained by the pulse in-put of tracer. Static pressure gradient and local gas holdup in the riser and downcomer sections were calculated using the measured pressure profile in each section. The circulation time of suspension was diminished compared with that of solid-free liquid in the bubbly and transition flow regimes. An energy balance was made over the circulating fluid in the bubble column as the control volume and from which a polynomial equation with a velocity of the suspension as a variable was obtained. The velocities of suspension calculated from the steady-state numerical simulation of the poly-nomial equation which is dependent on the local gas holdup of each section of bubble column. physical properties of suspension, the ratio of the cross-sectional area of inner to outer column and the length of the draft tube, could explain the characteristics of circulation of suspension in a solid-suspended bubble column with a draft tube very well.