Screening type coarse slime sorting jigger

Abstract

The invention discloses a screening type coarse slime sorting jigger. The screening type coarse slime sorting jigger comprises an upper machine body, a lower machine body, a numerical-control air bellow and a header water tube, wherein the upper machine body is rectangular, and comprises a partition, an air chamber, a screen plate, an artificial bed layer and a buoy; the partition is used for dividing the upper machine into partition sections, each partition section is divided into 2-3 chambers, each chamber is at least provided with an air chamber which is arranged on the bottom in the uppermachine body, the screen plate is arranged at the upper end of the air chamber without an angle of inclination, the artificial bed layer spreads on the upper surface of the screen plate, and the buoyis arranged at the upper end of the artificial bed layer; a raw material charge hole is formed in one end of the upper machine body, and the other end of the upper machine body is provided with a light product overflow weir; the lower machine body is tapered, and comprises a discharge wheel, a discharge hole and a valve, the discharge wheel is arranged at the lower end of the lower machine body, the discharge hole is formed in the tail end of the lower machine body, the discharge wheel is arranged above the discharge hole, the valve is arranged at the lower end of the discharge hole, and the bottom of the upper machine body is connected to the upper part of the lower machine body; the numerical-control air bellow is mounted at the upper side of the upper machine body in a length directionof the upper machine body, and is connected to the air chamber through an air tube; and the header water tube comprises a washing water pipeline and a backwater pipeline.

Description

technical field [0001] The invention relates to the field of coal preparation equipment, in particular to a screen-through coarse coal slime sorting jig. Background technique [0002] With the further improvement of coal mining mechanization, there are more and more fine coals in the raw materials of coal preparation plants. In addition, secondary fine coals will be produced after crushing and other processes in the coal washing process. Because it is difficult to recycle, clean coal exists in coal slime and becomes "waste". The ash content of these coal slimes containing coarse clean coal is between 40-55%, and coarse-grained coal slime accounts for between 30-45%. At present, Domestic comprehensive utilization of these coal slimes is mainly used in power plants or coal gangue power plants for blending and distributing power generation, or stacked in the open air or buried on site, which pollutes the environment and wastes resources. [0003] In the prior art, equipment su...

AI Technical Summary

Problems solved by technology

The theoretical separation particle size range of dense medium and water medium cyclone is 50mm ~ 0.5mm, but the production practice shows that its separation accuracy for 3 ~ 0.5mm particle size material is poor; TBS, CSS, TCS and other interference bed separation The sorting machine is to mix the pulp material fed into the upper end of the sorting machine with the rising water flow, and form a relatively stable disturbed bed under the action of a certain period of time. The product flow; the density of the feed particles is higher than the average density of the bed, and the bed will pass through the bed due to its own weight, and enter the sinking flow from the tailings discharge port, so that the materials can be separated according to density; in practical applications, it is mainly aimed at 2 ~0.25mm coarse coal slime, the best sorting particle size range is 1-0.25mm (that is, the particle size ratio is 4:1), and the effective sorting density is 1.4-1.8g / cm 3 , its disadvantages are: the range of sorting particle size is narrow, if the feed particle size ratio exceeds 4 times, it will cause the loss of clean coal and cause the separation effect to deteriorate; in addition, a single rising water flow cannot form a stable interference bed, which will affect the separation effect ;The ash content of the sorted product is generally between 14-18%, and it is difficult to separate the qualified clean coal below 10% at one time; the ash content of the tailings is generally 50-60%, and 20% of the clean coal is still lost in the tailings

The spiral separator belongs to the principle of flow film separation, which relies on the characteristics of liquid flow. The coarse slime slurry is fed from the top of the spiral separator, and the coarse slime descends spirally in the spiral groove, and is driven by gravity, centrifugal force and water flow. The separation of minerals with different densities can be realized under the left and right of the force; the maximum separation size is 3mm-0.15mm; the advantage is that no power is needed, no moving parts, and it is suitable for thermal coal separation. The disadvantage is that when the separation density is low, it will affect the separation. The separation effect, the product quality is easy to fluctuate, and the separation accuracy is poor. The ash content of the sorted product is generally 14-18%, and it is difficult to sort out qualified clean coal below 10% at one time. The tailings ash content is generally 40-60%, about 20% of the clean coal is still lost in the tailings; therefore, the effective recovery of coarse coal slime can recover resources, protect the environment, reduce resource consumption, and is of great significance to the sustainable development of the coal industry. Coarse slime separation equipment and technology Innovation has become an urgent priority

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