A classification method for solid-liquid two-phase flow slurry

Abstract

The invention discloses a grading method for solid-liquid two-phase flow size. The grading method for the solid-liquid two-phase flow size includes that step 1, feeding the solid-liquid two-phase flow size to a hopper type material barrel, wherein the fine material ascends and overflows towards the outside through a top opening of the hopper type material barrel, the coarse material sinks, and sediment is discharged to the outside through a bottom outlet of the hopper type material barrel; step 2, detecting overflow rate and sediment concentration in real time, stabilizing the overflow rate and sediment concentration in standard ranges, and grading to obtain fine products and coarse products in a constant settling speed. The grading method for the solid-liquid two-phase flow size intelligently controls the feed amount and discharge amount through monitoring the overflow speed and discharge concentration in real time so as to realize dynamic balance and realize constant-speed settling grading of solid particles; the grading method for the solid-liquid two-phase flow size realizes precise grading control for the granularity and concentration of solid-liquid two-phase flow size grading products through full-automatic operation and control, obtains the fine products and coarse products with high grading quality and innovates the solid-liquid two-phase flow size grading methods in the mine, metallurgy, building material, chemical engineering and the like industries.

Description

technical field [0001] The present invention relates to the technical field of material classification, and more specifically to a method for classifying solid-liquid two-phase flow slurry, especially a solid-liquid two-phase flow slurry classification method applied in industries such as environmental protection, mining, metallurgy, building materials, and chemical industry. method. Background technique [0002] In environmental protection, mining, metallurgy, building materials, chemical industry and other industries, it is often necessary to carry out the classification operation of solid-liquid two-phase flow slurry, especially in the pulp classification and desliming operations, it is usually necessary to separate the solid particles in the slurry slurry according to their particle size and specific gravity. Differential classification into fine-grained products and coarse-grained products. At present, the classification and desliming equipment used for solid-liquid tw...

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Problems solved by technology

At present, the classification and desliming equipment used for solid-liquid two-phase flow slurry at home and abroad mainly include cyclones, spiral classifiers, thickening hoppers, inclined plate thickening boxes, etc. These equipments have the following main characteristics during use: ① Cyclone It is mainly used for closed-circuit classification and desliming of ore grinding. The advantages are large processing capacity, high product concentration, and less water consumption in the grinding system; the disadvantages are large power consumption, high difficulty in operation, poor control of product particle size and concentration, and poor classification efficiency. About 55%; ②The spiral classifier is used to form a closed-circuit classification with the grinding machine. The advantage is that it works stably and has a self-elevating function; the disadvantage is that it needs to add water to dilute the pulp concentration before classification and sand return, and the water consumption is large, and the concentration of the product pulp is thin , and the processing capacity is small, and the classification efficiency is about 35%.

③Thick mud hopper is mainly used for desliming in gravity separation process and pre-grading of open circuit grinding. The equipment has no power consumption and simple structure, but the disadvantage is that it is difficult to control the concentration of sediment, the discharge is not smooth, and the desliming efficiency is low; ④Inclined plate The thickening box is mainly used for desliming and dehydration, and has a large unit processing capacity, but it has the disadvantages of difficult control of the sediment concentration, unsmooth discharge, and low desliming efficiency, just like the thickening hopper

Therefore, the common defects of the classification and desliming equipment of solid-liquid two-phase flow slurry in the prior art are low classification efficiency, poor control of product particle size and concentration, and failure to obtain the required fine-grained and coarse-grained products.

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