A technology based on separate treatment to reduce heavy medium consumption in coal preparation plant

Abstract

The invention provides a technology for reducing dissipation of dense media of a coal preparation plant based on distribution independent treatment. The technology mainly comprises the following stepsthat raw coal is subjected to dense medium separation and then enters a sculping screen; products screened at the front section of the sculping screen become qualified media, and the products screened at the rear section of the sculping screen become rare media; the rare media enter a rare medium barrel; the qualified media partially enter a qualified medium barrel through distribution, and otherparts enter a qualified medium magnetic separator after being dispersed through a demagnetizing device; concentrate of the qualified medium magnetic separator enters the qualified medium barrel, andtailings enter the rare medium barrel; materials of the rare medium barrel enter a rare medium magnetic separator; and concentrate of the rare medium magnetic separator returns to the qualified mediumbarrel, and tailings enter the slime water treatment technology. The technology is characterized in that the demagnetizing device is arranged for eliminating medium magnetic agglomeration, the beneficial condition is created for follow-up recovering, the qualified media are treated by independently adopting the magnetic separator, the stability of the medium recovering link is improved, by the adoption of the technology, the stability of the medium recovering process is improved, the recovering ability is improved, and the medium consumption can be reduced by over 10%.

Description

technical field [0001] The invention belongs to the field of dense medium coal preparation, and relates to a medium recovery process in a dense medium coal preparation process, in particular to a process for reducing heavy medium consumption in a coal preparation plant based on split flow and separate treatment. Background technique [0002] The dense medium separation process is currently the mainstream process in coal preparation plants, and about 70% of the raw coal is processed through the dense medium separation process. Dense medium separation has the advantages of high precision, high efficiency, and large processing capacity, and its proportion in coal preparation plants will increase in the future. [0003] Heavy medium consumption is the main raw material consumed in the coal preparation production process, accounting for about 20% of the processing cost of the coal preparation plant. Media loss will also bring adverse effects such as equipment wear and slime wate...

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Problems solved by technology

[0010] Aiming at the problem that it is difficult for the magnetic separator in the existing process to realize desliming, recovery, magnetic agglomeration and medium loss caused by the fluctuation of the flow rate of the qualified medium at the same time, the present invention proposes a separate magnetic separation desliming treatment process after the demagnetization of the qualified medium, providing A process based on separate treatment to reduce heavy medium consumption in coal preparation plants

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