This work focus on the effects of bottom blowing operations on the bath mixing, plume velocities, “dead zone” volumes, shear stresses on bottom refractory and gas efficiency of the bottom blowing. It was found that the mixing time increased when bottom blowing flow rate decreased or the tuyere number decreased. The mixing time decreased 54.8% when the bottom blowing flow rate increased from 15 L/min to 50 L/min by applying 12 tuyeres. If the total bottom blowing flow rate was constant (50 L/min), the mixing time increased 52.9%, when 3 tuyeres were applied compared to that of 12 tuyeres. When the tuyere number used in the bottom blowing decreased, the volume of “dead zone” and “low-velocity zone” increased 4.89% and 28.9%, respectively. Moreover, blowing flow rate increased when the tuyere number decreased to 3 when the total flow rate was not changed. The maximum value of velocity in the liquid–gas region increased from 0.34 m/s to 0.64 m/s. As a result, strong shear stress, which was not favorable for bottom refractory, was formed in the vicinity of the bottom blowing tuyeres. The intensity of the shear stress increased 52% on the bottom refractory. Furthermore, based on the numerical analysis results, it was found that the transfer index of bottom blowing gas were affected by the blowing operations. The utilization rate of gas energy of the bottom blowing decreased although the kinetic energy increased with increasing of bottom blowing flow rate. The utilization rate of gas energy was slightly changed if the total flow rate was small. It was also found that higher utilization rate of gas energy of the bottom blowing can be obtained when more tuyeres were applied in the process based on the current model. If the bottom blowing flow rate was 50 L/min, the utilization rate of gas energy decreased 18.4% and 23.3% when the tuyere number decreased from 12 to 6 and 3, respectively.