A kind of coarse coal slime sorting system and sorting method

Abstract

The invention discloses a coarse slime separating system and method, belongs to the field of coal separation, and particularly adaptable to direct separation of whole low-concentration slime water in the process of jigging coal separation. The system comprises a water power separating device, a feeding pump, a hydrocyclone, a dewatering device and a flotation device. Rough separation is performed on low-concentration slime water through the water power separating device, concentrated underflow of the water power separating device is separated through the hydrocyclone. By the aid of the coarse slime separating system and method, the whole low-concentration slime water can be separated directly, cost is reduced, system links are simplified, total system investment is reduced, and simple and practical effect that the existing coarse slime separating method cannot achieved is obtained.

Description

Technical field [0001] The invention relates to a coal slime sorting system and a sorting method, in particular to a coarse coal slime sorting system and a sorting method for sorting coarse coal slime. Background technique [0002] At present, in the coarse coal slime separation methods commonly used at home and abroad, there are mainly TBS, water medium cyclone, spiral separator, etc. Among them, TBS is the most used, and the rising water flow is used as the separation power in the separation. In the water injection system, the sorting granularity is generally between 0.3 and 2 mm, and there is a high requirement for the concentration of the feed material. The conventional dehydration sieve water needs to be concentrated by the cyclone before being fed into the equipment, and the subsequent dehydration process is more complicated. Complicated, the whole system needs a certain height difference, and the system investment is large, which restricts some enterprises with small ...

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Problems solved by technology

[0002] At present, in the coarse coal slime separation methods commonly used at home and abroad, there are mainly TBS, water medium cyclone, spiral separator, etc. Among them, TBS is the most used, and the rising water flow is used as the separation power in the separation. In the water injection system, the sorting granularity is generally between 0.3 and 2 mm, and there is a high requirement for the concentration of the feed material. The conventional dehydration sieve water needs to be concentrated by the cyclone before being fed into the equipment, and the subsequent dehydration process is more complicated. Complicated, the whole system needs a certain height difference, and the system investment is large, which restricts some enterprises with small capital to choose this method, and in actual production, this sorting method is difficult to operate and the equipment is not easy to adjust; water medium swirl flow The device uses the difference in the radius of movement of slime particles of different densities under the action of centrifugal force to achieve separation. This method is relatively simple in system, less in investment, easy to operate, and has a wide separation size of 0.5-5mm. However, in practice In production, when the feed concentration is low, the separation effect is unsatisfactory, and the underflow "runs rough" often occurs, and the processing capacity of a single cyclone is not high, while the coal preparation plant with general production capacity has a large amount of slime water , which leads to the fact that when the equipment is selected, the quantity is often large, the operating power is large, and the investment is large, which is not suitable for direct separation of all the slime water in the system; the spiral separator is more commonly used in the field of domestic thermal coal separation. The separation density of this method is high, and it is difficult to achieve low-density separation, which limits the development of this method in the field of coking coal, and this method requires more auxiliary equipment in actual production, and has certain requirements for the height of the plant. Larger, in practical applications, it will also be limited by funds

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