Low-pressure feeding two-product heavy-medium cyclone for realizing high-density sorting of low-density medium

Abstract

The invention discloses a low-pressure feeding two-product heavy-medium cyclone for realizing high-density sorting of a low-density medium. The cyclone comprises a cylindrical first-grade concentration cyclone and a cylindrical / frustum-shaped / conical second-grade sorting cyclone connected by a pipe, wherein the first grade adopts low-pressure feeding to mainly realize the concentration of the low-density medium; and the second grade realizes high-density sorting by using a concentrated medium. The ratio of the cylinder diameter to the maximal particle size of the first-grade cylindrical concentration cyclone is 8-12; the ratio of the diameter of a feeding pipe of the cylinder diameter is 0.3-0.4; the taper ratio is 1.6-2.4; the taper angle of the frustum part of the cylindrical / frustum-shaped / conical second-grade sorting cyclone is 5-20 degrees; the taper angle of the cone part is 40-90 degrees; a feeding pipe of the second-grade cyclone is involuted; and the installation angle is 20-30 degrees. When the feeding pressure is reduced to 10-40%, low-density suspension can be effectively used for sorting high-density minerals; and the difference between the sorting density and the suspension density can reach 0.6-1.0 kg / l. The cyclone is simple in production process, low in energy consumption, low in equipment and pipe wear, low in production cost and high in sorting efficiency.

Description

technical field [0001] The invention relates to a sorting equipment for mining, specifically a low-pressure feeding two-product heavy-medium cyclone for high-density sorting of low-density medium, which is mainly used in high-density minerals such as phosphate rock and oil shale. sorting. Background technique [0002] Dense medium cyclone is a kind of equipment that uses centrifugal force to strengthen mineral separation in heavy medium suspension. It has a simple structure and no moving parts. It is widely used in the separation of mineral resources. The quality of the dense medium suspension largely determines the effect of mineral separation and the economy of the dense medium separation process. Due to the difficulty in preparing high-density dense medium suspensions, the complexity of the follow-up medium purification process, and high medium consumption, most of the dense medium suspensions used in existing dense medium cyclones are concentrated at about 1.4kg / l-1.5kg...

AI Technical Summary

Problems solved by technology

However, the existing three-product dense medium cyclone that utilizes low-density media to achieve high-density separation requires a feeding pressure much higher than conventional coal preparation for effective separation of high-density minerals, resulting in three-product dense medium cyclone The flow device is seriously worn and has a short service life

In order to solve the problem of excessive feeding pressure of the existing cyclone at present, the present invention is developed

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