Integrated device for hydraulic classification and sorting of coarse slime as well as classification and sorting system

Abstract

A coarse coal slime hydraulic grading and sorting integration device and a sorting system using the device belong to the technical field of cleaning unit and are used for shortening technological processes of coal separation and improving the sorting accuracy of the coal slime. The grading and sorting integration device comprises a hydraulic grading swirler, an upwelling current sorter and a connecting barrel, which are connected in sequence. A coarse coal slime grading and sorting system is composed of the grading and sorting integration device, a hydraulic grading swirler barrel, a hydraulic grading swirler pump, an arc-shaped sieve, a coal slime centrifuge, a gangue dewatering sieve, a cleaned coal belt conveyer, a gangue belt conveyer and a main pipeline. The hydraulic grading swirler barrel is connected with the feeding hole of the hydraulic grading swirler, the overflow port of the hydraulic grading swirler is connected with the pipeline of a floatation system. The overflow port of the upwelling current sorter, the arc-shaped sieve, the coal slime centrifuge and the coal slime belt conveyer are connected in sequence. The overflow port at the bottom of the upwelling sorter is connected with the gangue dewatering sieve, the gangue belt conveyer and a thickener in sequence.

Description

technical field [0001] The invention relates to a device and a system for grading and sorting coal slime, and belongs to the technical field of coal preparation equipment. Background technique [0002] Coal slime classification and separation are two important links in coal preparation production. Classification is to divide the mixed materials with different particle sizes into different particle size products according to a certain particle size (usually 0.5-0.3mm), so as to meet the requirements of coal preparation process or coal preparation method. Generally speaking, the coal slime larger than this particle size is called coarse coal slime, and the gravity separation method should be adopted, and the separation basis is the density difference of materials; the coal slime smaller than this particle size is called fine coal slime, and flotation should be used for separation. The basis for selection is the difference in the surface properties of the material. The equipm...

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Problems solved by technology

There are problems such as long coal preparation process, poor separation accuracy, and high construction investment and operating costs of coal preparation plants.

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