Process Intensification of Stirred Pulp-mixing in Flotation

Publication date: Available online 11 March 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Zhen Li, Chengqian Zhao, Huaiqing Zhang, Jiongtian Liu, Chao Yang, Shanxin XiongABSTRACTWith the increasing demands for the high efficiency of pulp-mixing, which is adapted to the fine particles entering into flotation section, an intensification pulp-mixing device with novel design has been developed. On the basis of numerical simulation, which indicated efficient circulation and shear effect of the “maleic-cutting” configuration equipped with static-guide-blade, the power dissipation amount PV, mixing time θm, power number NP, mixing time number Nθ, CS which reflects shear property, suspension percentage φ/Φ(%), and concentration variance σ2 were measured, analyzed and compared with the ordinary agitated tank. Combining with actual mineral separation tests, performance of the efficient pulp-mixing device characterized by “multi-stage and compulsory” has been validated: the “multi-stage and compulsory” mixing device corresponds to a different circulation/shear energy; under the same operating conditions, the absolute advantages in the aspect of mixing time are the root cause for the increase of mixing efficiency; the “maleic-cutting” configuration is less influenced by pulp-mixing time and has the characteristics of achieving fast mixing; the strong shear effect mechanism is the root cause for the realization of pulp-mixing inte...

Source: Chemical Engineering and Processing: Process Intensification - March 12, 2019 Category: Chemistry Source Type: research