Centrifugal separation device

Abstract

The invention relates to a centrifugal device used for separating fine particles different in density in slurry and discloses a centrifugal separation device. The separation principle of existing centrifugal devices for separating fine slurry by proportion is characterized in that the slurry is kept in relative movement with a reel under the effect of inertia generated when the slurry flows along with rotation of the centrifugal reel, therefore laminar flow with velocity gradient is generated, and the purpose of separating by proportion is achieved by the aid of bagnold effect generated in the laminar flow. The devices have the defect that separation effect is affected due to the fact that the velocity gradient of the relative movement of the slurry is not easy to control. Through the centrifugal separation device, a mechanical excitation device capable of controlling action strength of the centrifugal separation device is utilized to apply dynamic excitation to a slurry material in a centrifugal field, the slurry material can be enabled to generate laminar flow having appropriate velocity gradient relatively to the centrifugal device, bagnold effect is enhanced, and the purpose of accurate separation is achieved accordingly.

Description

technical field [0001] The invention relates to a centrifugal device for separating fine particles of different densities in a slurry. Background technique [0002] Among the centrifuges for separating fine particles of different densities in slurries that have been put into widespread commercial use, there is a centrifuge with a bowl-shaped drum, which was first disclosed in Canadian Patent CA1111809A1, and in a series of patents or patent applications thereafter , including US4608040, US4846781, US5338284, US5462513, US5586965, US5601523, US6149572, US6796934, US2004013260, US20050026766, US20060135338, continuously improved and perfected, known as the Knelson centrifuge. The main structure of this type of separation equipment includes a vertical bowl-shaped drum that can rotate at high speed and one or more annular chutes located on the outer peripheral wall of the drum. A feeding pipe leads to the bottom of the drum. The impeller that can accelerate the rotation of the ...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of this device is that when the slurry material has a high concentration, it still tends to form a laminar flow even at a fast flow rate, and deposits are formed on the outer wall of the separation chamber, making it difficult for high-density materials to flow continuously and smoothly. discharge separation chamber

This situation makes it forced to use a lower slurry concentration or a higher differential velocity between the slurry and the separation chamber when setting the separation operation parameters, thereby reducing the work efficiency and separation accuracy, and raising the lower limit of the separation particle size

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