A complete set of pre-desliming flotation equipment

Abstract

The invention belongs to the technical field of mineral separation, and in particular relates to a complete set of pre-sliming flotation equipment. By setting the self-interference elastic rectification and desliming unit, the inclined rectification hole formed by the inclined plate is used as the rectification device, which can change the turbulent flow into laminar flow and accelerate the sedimentation of particles, shortening the settling time; The narrow diversion channel forms a high-speed flow, and forms convective interference on the material flow at the bottom of the first material drainage channel in the self-interference mixing zone, thereby making the material disturb and settle, accelerating the separation of clean coal and fine mud, and improving the flotation feed. Desliming in advance to reduce the viscosity of the flotation feed material; at the same time, the connecting rod jet stirring suction mechanism is adopted, and the suction nozzle is used to spray the impeller in the air chamber, driving the connecting rod stirring impeller in the flotation tank, overcoming the resistance of the sprayed water body, and greatly reducing energy consumption , so that pulps of different concentrations are fully mixed under reasonable impeller agitation and provide sufficient air intake to improve flotation efficiency.

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...

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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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