Complete equipment for pre-desliming floatation

Abstract

The invention belongs to the technical field of mineral separation and particularly relates to complete equipment for pre-desliming floatation. A self-interference elastic rectifying and desliming unit is arranged, and an inclined rectifying hole formed by an inclined plate is adopted as a rectifying device, so that particle settlement is accelerated while turbulent flow is changed into laminar flow, and the settlement time is shortened; the rectifying device adopts a diversion channel of which the cross section is wide in upper part and narrow in lower part, and high-speed flows are formed and form convection interference on a material flow at the bottom of a first material drainage channel in a self-interference mixing area, so that the materials are subjected to interfered settling, the separation of clean ash from fine silt is accelerated, floatation feed materials are subjected to pre-desliming, and further the viscosity of the floatation feed materials is reduced; meanwhile, a connecting rod injection stirring air suction mechanism is adopted; air suction spray nozzles are adopted for injecting an impeller in an air chamber and drive a connecting rod stirring impeller in a floatation tank, so that the resistance of an injection water body is overcome, energy consumption is greatly reduced, ore pulp with different concentrations is fully mixed under the reasonable impeller stirring action and provides enough suction intensity, and the floatation efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of mineral separation, and in particular relates to a complete set of pre-sliming flotation equipment. Background technique [0002] In the process of wet coal preparation, the clay minerals mixed into the coal seam are muddy after being soaked in water, dispersed into fine mud, and accumulated in the floating coal slurry. The flotation speed of high-ash fine mud is fast, resulting in "sticky" foam, which brings difficulties to the subsequent flotation clean coal dehydration operation. At the same time, the fine mud has a large specific surface area, which "preemptively" adsorbs the flotation agent, so that ordinary coal particles cannot obtain the agent. It makes it more difficult for general coal particles to adhere to air bubbles, which deteriorates the flotation effect and is extremely unfavorable to coal preparation production. Therefore, it is necessary to deslime the coal slime in the coal preparatio...

AI Technical Summary

Problems solved by technology

The flotation speed of high-ash fine mud is fast, resulting in "sticky" foam, which brings difficulties to the subsequent flotation clean coal dehydration operation

At the same time, the fine mud has a large specific surface area, which "preemptively" adsorbs the flotation agent, so that ordinary coal particles cannot obtain the agent

It makes it more difficult for general coal particles to adhere to air bubbles, which deteriorates the flotation effect and is extremely unfavorable to coal preparation production. Therefore, it is necessary to deslime the coal slime in the coal preparation plant before selection.

However, the existing flotation feeding and desliming tank occupies a large area, and the vertical tube bundle rectification device adopted changes the rising water flow from turbulent flow to laminar flow, and the free settlement is not sufficient in the time period.

At the same time, in the flotation stage, because the commonly used jet flotation machine is not equipped with a stirring device, when the concentration of the pulp is high, it cannot provide enough power to fully mix and disperse the pulp, air bubbles, and flotation agents; while the mechanical stirring type The high speed of the stirring device of the flotation machine requires high energy consumption, and the low speed can not form a good flow field and suction volume, and the new jet suction stirring mechanism is close to the plume because the slurry in the jet section is submerged. Most of the injection energy is consumed by the pulp, so the injection efficiency is greatly reduced, which greatly reduces the stirring efficiency and interferes with the stirring flow field

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