Three-product cyclone micro-bubble flotation column separation equipment and method

Abstract

The invention discloses separation equipment with three-product cyclone micro-bubble flotation columns and a separation method implemented by the separation equipment. The separation equipment mainly comprises a water spray pipe, a froth concentrate tank, an upper flotation column, a lower flotation column, a middling discharge pipe, a circulating pulp pipe, a feeding pipe, a tailing pipe and the like. The separation method includes serially arranging the upper flotation column and the lower flotation column in a staggered manner; arranging the middling discharge pipe at the lower end of the upper flotation column; organically combining serial flotation, sedimentation flotation and column flotation with one another to repeatedly and continuously concentrate concentrate products, reduce high-dust fine slime pollution to the greatest extent and guarantee the quality of flotation concentrated tailing products. The separation equipment and the separation method have the advantages that the separation equipment is simple in structure and can be operated easily and conveniently, additional power and additional chemical consumption are omitted, the products are flexible in structure, the problem of conflict among separation efficiency, energy consumption and chemical consumption can be effectively solved, and the technical difficult problem of poor separation effect for coal slime with high concentration and high-dust fine slime content and poor selectivity can be effectively solved; the height proportion of the upper flotation column to the lower flotation column can be flexibly adjusted, so that the separation equipment and the separation method are adaptive to variation of flotability of minerals.

Description

technical field [0001] The invention relates to a three-product cyclone micro-bubble flotation column separation equipment and method, especially suitable for the separation of coal slime with high concentration, high ash fine mud content and poor selectivity, and also suitable for the separation of other minerals. Background technique [0002] With the improvement of coal mining mechanization in my country, the deterioration of resource geological conditions, the large-scale construction of coal preparation plants and the wide application of dense medium cyclones, the proportion of high-ash and difficult-to-separate fine-grained coal has increased sharply, and some of them have been floating in raw coal -0.074 The fine slime content of mm size is as high as 90%, and the buoyancy of the slime is very poor, and the progress is showing a worsening trend, which makes the contradiction of the slime separation more prominent. Coal slime separation becomes micro-fine particle separa...

AI Technical Summary

Problems solved by technology

However, when dealing with the floating coal slime with a high concentration of coal slime water and the fine coal slime with a particle size of -0.074mm exceeding 50%, there is a problem: it is difficult to ensure the clean coal and fine coal in the direct flotation of high-concentration coal slime water. The ash content of the tailing coal meets the quality requirements at the same time, which ensures the ash content of the clean coal, and the ash content of the tail coal is low, resulting in the loss of the clean coal in the tail coal and causing a waste of coal resources; Heavy medium back ash" is a serious problem, which affects the recovery rate of clean coal and the economic benefits of enterprises

Some coal slimes have poor selectivity, and it is difficult to sort strictly according to their buoyancy. As a result, some high-ash fine slimes enter the foam layer due to hydraulic entrainment and entrapment during the clean coal lifting process, resulting in high ash content in clean coal. , or even unqualified; the phenomenon of coarse tailing coal is serious, resulting in a serious waste of clean coal resources; the particle size is too fine, and subsequent filter press dehydration operations are difficult to carry out normally

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