Ultrafine tailing thickener

Abstract

The invention discloses an ultrafine tailing thickener which comprises an outer barrel and an inner barrel arranged in the outer barrel in a sleeved mode. The upper ends of the outer barrel and the inner barrel are open, and the bottom ends are closed; a certain gap is formed between the outer wall of the inner barrel and the inner wall of the outer barrel; and a plurality of kidney-shaped throughholes are evenly distributed in the barrel wall of the lower portion of the inner barrel in the circumferential direction. Water in the ultrafine tailing floccules is discharged in a manner of forming pressure difference between the inner barrel and the outer barrel, so that the effect of increasing the concentration is achieved, the structure of the thickener is greatly simplified, a central rake frame is not required to be additionally arranged, a bottom conical structure is not required to be designed, the manufacturing cost and the use cost are greatly reduced, and the thickener has an important economic effect; a drain valve is arranged on the barrel wall of the outer barrel, so that the water level difference is adjusted, the pressure difference is further adjusted, the effect of adjusting the concentration is finally achieved, and the ultrafine tailings with the maximum concentration of 60% can be formed for ultrafine tailings, namely tailings with the fine particle proportionof 75 microns or below being 95% or above.

Description

technical field [0001] The invention relates to solid-liquid separation technology, in particular to an ultrafine tailings thickener. Background technique [0002] The ore grade in our country is generally low, and the ore dressing is difficult, resulting in finer and finer tailings particle size and large tailings output. At present, the main methods of tailings disposal in my country are surface stockpiling and underground filling. The low-concentration tailings disposal method has a large water content, which not only brings risks to the stability of the accumulation, but also easily leads to environmental pollution and engineering disasters. And so on a series of questions. [0003] At present, there are deep cone thickeners, high-efficiency thickeners and high-efficiency deep cone thickeners commonly used in China for high-concentration disposal equipment for ultra-fine tailings. [0004] For example, the application number is a thickener proposed by the patent documen...

AI Technical Summary

Problems solved by technology

[0005] The basic principle of this type of thickener is to use the flocculant to cooperate with the rotation of the central rake to achieve the effect of thickening the tailings. The thickener with this principle has the following disadvantages: First, use the rotation of the central rake to disturb the settlement area to squeeze out water, and the rake Continuous rotation is required, and the energy consumption of the equipment is high. Second, the center rake rotates. If the feed volume is too much or the tailings are too thick, the rake is crushed, which is a serious accident. Ultra-fine particle tailings, the concentrated pulp concentration is generally not higher than 55%

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