THEORETICAL BASIS FOR THE LIQUID FLOWING PROCESS IN HYDRAULIC HORIZONTAL CLASSIFIER

Details

Parent Category: Geo-Technical Mechanics, 2014

Category: Geo-Technical Mechanics, 2014, Issue 115

UDC  622.752.3:532.51

Authors:

V.P. Franchuk, D.Sc. (Tech.), Professor,

A.O. Bondarenko, Ph.D. (Tech.), Associate Professor

(SHEE «NMU»)

Abstract.

As quality of natural non-metallic sands does not meet current norms set for the end products by their controlled physical and mechanical properties it is necessary to pre-process the feedstock. As a rule, the primary processing assumes separation of the fine-grained, clay and silty  (dispersed) impurities from the sands. The most preferable device is a hydraulic horizontal classifier which effectively separates the fine-grained purities. The process of gravity processing of granular materials in the horizontal pulp stream is accompanied with a bearing stream flowing on the surfaces inclined at different angels and with the outflow of the thickened underflow. In order to  correctly describe the process, a mathematical model of the stream flowing in the channel of the classifier was designed with the use of the Euler equation for an ideal (nonviscous) liquid. The mathematical model showed theoretical dependences between the flow speed and acceleration. The flow was divided into specific stages: separation, sedimentation and outflow.

 The purpose of this work was to design a mathematical model of the bearing horizontal stream flowing in the channels of the hydraulic horizontal classifier at the separation, sedimentation and outflow stages.

The created mathematical model allows to specify values for the stream speeds and accelerations at specific stages of the process and to ground rational parameters for the device used for the gravity processing of the granular materials.

Keywords:

gravity separation, horizontal classifier, mathematical modeling, flow of liquid.

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About the authors:

Franchuk Vsevolod Petrovich, Doctor of Technical Sciences (D.Sc.), Professor, Head of Department of mining machines and engineering, State higher educational establishment «National mining university» (SHEE «NMU»), Dnepropetrovsk, Ukraine.

Bondarenko Andrii Oleksijovich, Candidate of Technical Sciences (Ph.D.), Associate Professor of Department of mining machines and engineering, State higher educational establishment «National mining university» (SHEE «NMU»), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

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