A two-stage water media separation method for coarse coal slime

Abstract

The invention relates to a coarse coal slime two-section water medium sorting method. The method can be used for sorting and recycling of coarse coal slime in desliming and washing, the link of hydraulic classification in conventional coal desliming and washing and currently-popular coarse coal slime sorting is omitted, technological process is simplified, and cost is saved.

Description

technical field [0001] The invention belongs to the technical field of coal preparation, and in particular relates to a two-stage water-medium separation method for coarse coal slime. Background technique [0002] In coal preparation technology, according to the way of coal washing, it can be divided into washing with desliming and washing without desliming. The separation and recovery of 2-0.2mm coarse coal slime produced by desliming and washing is the focus and difficulty of coal preparation technology research. It is urgent to select effective separation equipment and formulate a reasonable coarse coal slime separation process. A problem solved. [0003] The process flow for sorting the coarse coal slime in the present invention can be respectively used for sorting and recovering the coarse coal slime in desliming and washing. [0004] The traditional desliming and washing process is that after the raw coal is classified by a 1-2mm sieve, the material under the screen ...

AI Technical Summary

Problems solved by technology

The disadvantages of the above sorting process are: 1. The classification and desliming effect of the hydraulic classifying cyclone is not ideal, because the hydrocyclone has obvious concentration effect while grading, so that a large amount of fine mud is mixed into the underflow and re-enters the heavy 2. Due to the unsatisfactory desliming effect, the dense medium system has high mud content, which not only affects the normal operation of the dense medium system, but also reduces the separation effect, and also affects the magnetic separator. Working effect, the heavy medium cannot be recovered efficiently, and the medium loss is relatively serious

The disadvantage of the first process is that the introduction of a new dense medium system and medium recovery system makes the coal preparation process more complicated. Not only does the construction investment increase, but also the production management is complicated, the medium recovery is more difficult, the medium consumption increases, and the production cost increases.

The disadvantage of the second process is that the separation accuracy of TBS or spiral chute, which is the main separation equipment for coarse coal slime, is not high enough. The economic benefit of the choice is not ideal

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