Efficient desulfuration and deashing dense medium separation technology for fine coal

Abstract

The invention discloses an efficient desulfuration and deashing dense medium separation technology for fine coal. The technology can be used for desulfuration and deashing of fine coal with the diameter diameter being smaller than 0.5 mm. In order to solve the problems that the desulfuration effect is not obvious and environmental pollution is caused in the traditional fine coal recycling process, ultrafine grain classification and reinforced gravitational field centrifugal flow membrane separation are combined, dense medium separation rather than water medium separation is adopted, and finally efficient desulfuration and deashing of the fine coal with the diameter being smaller than 0.5 mm are achieved. The gravitational field reinforcing method is beneficial to the fine coal desulfuration and deashing separation effect, and the efficient desulfuration and deashing dense medium separation technology is high in precision and simple, saves energy, is environmentally friendly, and has higher economic benefits.

Description

technical field [0001] The invention relates to the technical field of coal preparation, in particular to a high-efficiency desulfurization and ash-reducing dense medium separation process for fine-grained coal. Background technique [0002] The high-efficiency and low-cost separation of -0.5mm fine-grained coal has always been the focus of coal preparation technology research at home and abroad. With the improvement of coal mining mechanization in our country, the deterioration of resource geological conditions, the large-scale construction of coal preparation plants and the wide application of dense medium separation technology, the fine-grained coal content in raw coal is gradually increasing. Under the condition of increasing requirements, the high-efficiency separation technology and basic research of -0.5mm fine-grained coal have become a major direction in the development of my country's current clean coal field; it is also an important technology to realize the curren...

AI Technical Summary

Problems solved by technology

[0003] At present, no matter at home or abroad, the separation technology for fine coal and lump coal with a particle size above +0.5mm is relatively mature, and the separation method for fine coal with a particle size of -0.5mm is mainly foam flotation, but due to the slime foam Flotation generally has high separation cost and high power consumption, and the addition of flotation agents is unfavorable for flotation clean coal dehydration and subsequent purification and separation of coal slime water system

In addition, the separation accuracy of Falconl centrifugal separator with water as separation medium for fine coal needs to be improved

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