A continuous and stable discharge device and method for heavy products of a coarse coal slime separator

Abstract

The invention discloses a continuous and stable coarse slime sorting machine heavy product discharging device and method. The device comprises a sorting machine body, a water feeding system, a feedingsystem, a light product overflow system, a heavy product discharging system and an automatic control system. The water feeding system comprises a water tank arranged at the bottom of the sorting machine body. A water flow distributor is arranged at the upper portion of the water tank and provided with a plurality of holes. The feeding system is arranged at the center position of the top of the sorting machine body. The light product overflow system is arranged on the outer side of the upper portion of the sorting machine body .The heavy product discharging system comprises a heavy product collecting tank, a heavy product outlet and a spiral elevating device. The automatic control system comprises an automatic controller, a density measurer, a density sensor, a control valve, a water feeding pressure intensity meter and a control circuit. By means of the continuous and stable coarse slime sorting machine heavy product discharging device and method, disturbance on sorting from discharging is reduced, the sorting efficiency is greatly improved, the property of heavy products is stable, the water content is low, and the heavy product water removal treatment is reduced.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a device and method for continuous and stable discharge of heavy products of a coarse coal slime separator, which can also be applied to the separation of other minerals. Background technique [0002] Interference bed separator is the most common coarse coal slime separation equipment. This equipment is developed from hydraulic classification equipment and uses the principle of disturbance settlement to separate coarse coal slime. Since it was put into use in the 1980s, it has been widely used in the field of coal preparation worldwide. The interference bed sorter has the characteristics of simple structure, small footprint, high sorting efficiency, no moving parts, no media, etc., but in practical application, there are still the following problems. [0003] The heavy product discharge method of the disturbed bed separator is intermittent discharge, which...

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Problems solved by technology

[0003] The heavy product discharge method of the disturbed bed separator is intermittent discharge, which causes great disturbance to the flow field in the bed during discharge, and the separation environment is unstable, which greatly reduces the separation efficiency and separation accuracy, resulting in the ash content of clean coal Unstable; the disturbed bed sorter adopts a conical discharge valve or a bell-shaped discharge valve, which requires high transmission accuracy and difficult system control, so regular maintenance is very necessary; the heavy product of the traditional disturbed bed sorter has a large amount of moisture , the follow-up dehydration workload is large

[0004] Although there are intelligent coarse coal slime separators that use a discharge pump for discharge, but when it is necessary to replenish clean water when discharging, the water consumption is increased, and the requirements for the performance of the slurry pump are also high, and the process system is complicated and the cost is high.

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