Thickener control system and method

Abstract

The invention provides a thickener control system and method, and belongs to the technical field of beneficiation. The method comprises the following steps: adjusting the lifting height of a harrow frame according to the rotation resistance of the harrow frame, wherein the rotation resistance is in direct proportion to the pressure value of the pressure gauge; adjusting the rotating speed of the rake frame according to the thickness of a mud bed in the concentration tank; and adjusting the additive amount of a flocculating agent according to the suspended matter concentration of the overflow water in the overflow weir of the concentration tank. The technical effects that the automation degree of the thickener is improved, the rake pressing phenomenon is avoided to the maximum extent, the working efficiency of the thickener is improved, and the service life of the thickener is prolonged are achieved.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a thickener control system and method. Background technique [0002] In the beneficiation process, the concentrate and tailings are dehydrated through the thickener. The thickener is mainly composed of two parts: a circular thickening pool and a rotating rake. The solid particles suspended in the slurry in the thickening tank settle under the action of gravity, and the upper part becomes overflow water, so that the solid and liquid can be separated. The slime deposited at the bottom of the thickening tank is continuously scraped and collected by the rotating rake to the discharge outlet at the center of the bottom of the tank, and the overflow water overflows from the upper edge of the thickening tank. [0003] The disadvantages of existing concentrators are as follows: [0004] 1. Since the overflow water is to be used as water for process production, flocculants n...

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Problems solved by technology

[0004] 1. Since the overflow water is to be used as water for process production, flocculants need to be added in order to achieve a solid particle content of 100-300mg / L. The amount of flocculant added is not easy to control. If too little flocculant is added, the overflow water cannot meet the standard; if Adding too much flocculant will reduce the filtration capacity due to the stickiness of the pores of the filter cloth;

[0005] 2. If there are large particles (greater than 3mm) or sundries in the material, it is easy to cause the rotating rake of the concentrator to be blocked at the bottom flow cone, which will cause the bottom material layer to thicken, and the rake phenomenon will appear; if the rake appears (rake frame cannot be rotated), production can only be stopped for 4-5 days, and it is handled by manual dredging, which takes a long time, costs high, and delays production progress

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