Column type separating device and method for centrifugal pre-flotation

Abstract

The invention provides a column type separating device and method for centrifugal pre-flotation. The column type separating device and method are suitable for being used during mineral flotation. The column type separating device comprises a column type flotation device, the top of the column type flotation device is provided with an embedded centrifugal pre-flotation device comprising a centrifugal pre-flotation device groove, a centrifugal mineral laden bubble generator and a bubble collecting groove, a centrifugal impeller of the centrifugal pre-flotation device rotates in an impeller cavity to form negative pressure, flotation fed material and air enter the impeller cavity through a feeding pipe and an air suction pipe respectively, the flotation fed material is cut and smashed by the centrifugal impeller at high speed, the air is dispersed into bubbles, and the flotation fed material and the air are completely mixed in the impeller cavity, dispersed into the centrifugal pre-flotation device groove, and mixed and selected in a flotation mode again. Bubble products separated by the centrifugal pre-flotation device and bubble products separated by flotation columns are combined to serve as concentrate products, and pulp in the centrifugal pre-flotation device groove is fed into the flotation columns through bottom guide pipes for secondary separation. The column type separating device and method are high in flotation efficiency and good in stability.

Description

technical field [0001] The invention relates to the technical field of mineral flotation, in particular to a centrifugal pre-flotation column sorting device and method used in mineral flotation. Background technique [0002] Mineral particles present typical non-linear characteristics during the separation process. They are easy to float at the beginning, and become more and more difficult to float with the progress of flotation, but the flotation process is balanced. For the outstanding contradiction, this contradiction directly leads to the reduction of sorting efficiency and even the recovery capacity; the finer the particle size, the more significant this effect. Therefore, the influence of process factors on mineral separation is becoming more and more important, especially the design of the separation process that is compatible with the nonlinear flotation process of minerals. [0003] Although there are many types of flotation equipment at home and abroad, and flotat...

AI Technical Summary

Problems solved by technology

Cyclone micro-bubble flotation column is a high-efficiency separation equipment, which combines cyclone separation and column flotation, and adopts multiple mineralization methods. It has large processing capacity per unit volume, good separation selectivity and high efficiency. To a certain extent, it adapts to the nonlinear physical characteristics of minerals, and is especially suitable for the separation of fine-grained minerals, but the flotation recovery effect of easy-to-float coarse-grained minerals needs to be further improved

In addition, the research on equipment such as centrifugal flotation machines, fast flotation machines, and cyclone separators is a hot spot in the research of domestic process control technology, but the research on these equipments inevitably uses a single mineralization method to deal with nonlinear processes. The thinking is focused on a unit of the sorting process, rather than the overall process, and the key problem of nonlinear process design has not been found

Therefore, the mineralization efficiency is often improved at the expense of the recovery power. For example, the flash flotation machine can only be used at the front end of the process, and the jet flotation machine needs to be connected in series because the recovery rate cannot be guaranteed.

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