Micro-fine particle nano-bubble flotation method and system

Abstract

The invention relates to micro-fine particle nano-bubble flotation method and system. The fine particle nano-bubble flotation system comprises a flotation machine, a flotation tank and a stirrer, andis characterized in that the lower parts of the front wall and the rear wall of the flotation tank are communicated with an ore pulp nano-bubble inflation system, and the system is also externally connected with an air compressor; the system comprises a circulating pump, a nano-bubble generator, a pipeline and a valve, a feed port of the circulating pump is communicated with the lower part of therear wall of the flotation tank, a discharge port of the circulating pump is connected with two pipelines, one pipeline is provided with a valve, the other pipeline is provided with a valve and a nano-bubble generator, and the tail ends of the two pipelines are combined into one pipeline, which is communicated with the lower part of the front wall of the flotation tank to form a closed loop; the air compressor is connected with a pipeline positioned between the valve and the nano-bubble generator through an air conveying pipeline; the method has the advantages that 1) nano bubbles are used forultrafine mineral flotation to open up a new way, and 2) hematite flotation contrast test results show that under the same iron ore concentrate grade condition, the iron recovery rate of the iron oreconcentrate can be increased by at most 18%, and the flotation time is shortened by more than 2/3.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a fine particle nano-bubble flotation method and system. Background technique [0002] Mineral processing (that is, mineral processing) is an important link in the entire mineral processing and utilization process, and flotation is the most widely used mineral processing method. There are more than 2 billion tons of ore and more than 100 kinds of minerals in the country every year. Enrichment can be used. However, the optimum particle size of conventional flotation technology is roughly in the range of tens of microns, that is, in the range of 10-100 μm (the upper and lower limits of the particle size of specific minerals depend on the specific gravity, floatability and other parameters of the minerals). Beyond this particle size range, important sorting indicators such as flotation efficiency and recovery rate will drop sharply, or even fail completely. ...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a flotation system and method for fine particle nano-bubbles (<500 nm) with high sorting efficiency and less flotation reagents, so as to solve the problem that the existing flotation method cannot realize high-efficiency flotation separation of fine particles. A major technical problem, the development of key technologies for nano-bubble flotation that can effectively separate fine particles and realize the efficient utilization of mineral resources

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