Inflatable nano microvesicle high-ash coal slime flotation equipment and flotation method thereof

Abstract

The invention provides inflatable nano microvesicle high-ash coal slime flotation equipment. The inflatable nano microvesicle high-ash coal slime flotation equipment comprises a main flotation columnand two secondary flotation columns, the main flotation column comprises an agent box, an ore pulp preprocessor, a high-speed disperser and a delivery pump which are mounted outside the main flotationcolumn, and an ore pulp multi-spot distributor mounted on the main flotation column, a foam collecting device, an atomizing spraying device, a bubble generator surrounding the outer wall of the lowerportion of the main flotation column, a conveying air pipe, an air storage tank and an air compressor are further included. The main flotation column and the secondary flotation columns are adopted for sequentially selecting concentrate, middlings and tailings are removed, and clean coal products with the ash content of 11% or below are finally obtained.

Description

【Technical field】 [0001] The invention belongs to the technical field of coal slime and metal ore flotation, and in particular relates to an inflatable nano-microbubble high-ash coal slime flotation device and a flotation method thereof. 【Background technique】 [0002] Coal slime is one of the solid wastes with the largest emissions in my country. The reuse of coal slime resources is an inevitable choice for my country's coal-based energy structure, and it is also one of the important measures to implement sustainable development strategies. my country's policy on waste is reduction, recycling and harmless utilization. [0003] At present, the ash content of coking coal slime produced in coal mines is between 45% and 55%, and that of steam coal slime produced is between 35% and 50%. Some of these slimes have been reused by traditional equipment and processes, and exhausted All methods finally obtain a coal ash content between 12-20%, a recovery rate between 10-20%, and stil...

AI Technical Summary

Problems solved by technology

The same point is that the falling point of the flushing water is in contact with the foam, the contact surface is narrow, and the contact surface of the foam area is less than 15%, and the falling point is easy to cause impact damage to the foam

However, it is suitable for static flotation for coal and slime adsorption slime, high ash content, and particle size <0.125mm, and its swirl force field is not suitable for the separation of existing high-ash coal slime

In addition, the working medium of the air-slurry mixed-flow inflatable nano-bubble generator is circulating middling ore pulp, which can easily cause blockage of the air inlet of the inflatable bubble generator in actual production, making it impossible to introduce air normally and affecting the inflation effect

[0011] 5. The existing coal slime flotation column is sorted in series. The rough-selected concentrate foam entrains a large amount of marl without dispersion and defoaming treatment. The foam concentrate is directly fed into the next flotation column for further selection. The result is that the foamy concentrate entrained with marl is floated out again, which makes it difficult to flotation standard clean coal and reduces work efficiency

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