A coal dressing method and system of four-product jigging primary cleaning, secondary head coal small simplified heavy medium reelecting

Abstract

The invention discloses a coal dressing method and system of four-product jigging primary cleaning and secondary head coal small simplified heavy medium reelecting. The invention is a coal dressing method and system that selects the secondary head coal product through the four-product jigging technique and then reelects the secondary head coal with small simplify heavy medium separation technology. The adoption of the invention to select coal is characterized by less total investment, simpler system and lower operational expense, which can improve the stability of the system, reduce the powerconsumption, simplify the managing and maintaining work. The method can be easily realized with present technical merits, which is beneficial to be popularized in the middle and small coal washeries where the management level is low and if the method is used in oversize coal washeries, the cost for washing is lower.

Description

Technical field [0001] The invention relates to a coal preparation method and process, in particular to a coal preparation method and a coal preparation system for four-product jigging main separation, sub-clean coal small-scale simplified heavy medium re-selection. Background technique [0002] At present, the most commonly used coal preparation methods in domestic and foreign coal preparation plants are jigging coal preparation method and dense medium coal preparation method. It has the advantages of convenient equipment management, but the disadvantage is that the separation accuracy of hard-to-select and above coal is low; while the dense medium coal preparation method has the opposite advantages and disadvantages to the jigging coal preparation method. Years of practice have proved that jigging is suitable for easy and medium selectable coals, and heavy medium is suitable for difficult and extremely difficult coals. These two methods have their own scope of application,...

AI Technical Summary

Problems solved by technology

[0002] At present, the most commonly used coal preparation methods in domestic and foreign coal preparation plants are jigging coal preparation method and dense medium coal preparation method. The equipment management is convenient and other advantages, but the disadvantage is that the separation accuracy of difficult-to-select and above coal is low; while the dense medium coal preparation method has the opposite advantages and disadvantages to the jigging coal preparation method

These methods have the following problems: ①The re-intervention washing part has a large amount of washing, and the re-intermediation system is huge; ②The two large systems coexist, and the total investment is high; ③The two large systems operate at the same time, which is complicated; ④The operating cost is high

Because of these problems, these good methods cannot be better promoted and applied.

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