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Gradient air inlet coarse particle fluidization flotation device and method

A flotation device and coarse particle technology, applied in flotation, solid separation and other directions, can solve the problems of poor sorting accuracy and low recovery rate of coarse slime, and achieve high-efficiency sorting and recovery, which is beneficial to flotation recovery and high-efficiency separation. selected effect

Pending Publication Date: 2022-07-05
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above analysis, the embodiment of the present invention aims to provide a coarse particle fluidized flotation device and method with gradient air intake to solve the problems of low recovery rate and poor separation accuracy of existing coarse coal slime. Sorting and recovery of coal slime provides a high-efficiency separation and recovery device and method with simple structure and good separation effect

Method used

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  • Gradient air inlet coarse particle fluidization flotation device and method
  • Gradient air inlet coarse particle fluidization flotation device and method
  • Gradient air inlet coarse particle fluidization flotation device and method

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Embodiment 1

[0044] A specific embodiment of the present invention, such as figure 1 As shown in the figure, a fluidized flotation device for coarse particles with gradient air intake is disclosed, including a flotation column 4, a first air distribution unit and an air-water mixing and distribution unit, and the first air distribution unit and the air-water mixing and distribution unit are both located in Below the interior of the flotation column 4 , the air-water mixing and distribution unit is located above the first air distribution unit, and the bubbles generated by the first air distribution unit are mixed with the fluidized water and then enter the top of the flotation column 4 .

[0045] Compared with the prior art, in the coarse particle fluidized flotation device with gradient air intake provided in this embodiment, a first air distribution unit and an air-water mixing and distribution unit are arranged below the interior of the flotation column, and the first air distribution un...

Embodiment 2

[0074] Another specific embodiment of the present invention discloses a fluidized flotation method for coarse particles with gradient air intake. When there is only a primary air distribution unit, the steps include:

[0075]Step 1: Input air into the high-pressure air chamber 9 through the first air input pipe 8, and simultaneously inject fluidized water containing a foaming agent into the air-water mixing chamber 7 through the water delivery pipe 6.

[0076] The air in the high-pressure air chamber 9 is dispersed into a series of small air bubbles through the first bubble generating plate 10 and forms a micro-bubble upflow, which enters the air-water mixing chamber 7, and the fluidized water and a large number of micro-bubbles pass through the air-water mixing chamber 7. The fluid distribution above the mixing chamber 7 The plate 5 forms an upward flow of high microbubble content into the flotation column 4 uniformly. Thus, a flow field environment with low turbulence and h...

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Abstract

The invention relates to a coarse particle fluidization flotation device and method with gradient air inlet, belongs to the technical field of mineral separation and recovery, and solves the problems of low coarse slime recovery rate and poor separation precision in the prior art. The multi-stage gas distribution device comprises a flotation column and a multi-stage gas distribution unit, the multi-stage gas distribution unit and the flotation column are concentrically arranged, and the gas flow is sequentially reduced from the lower portion of the flotation column to the upper portion of the flotation column. Gradient air inlet is conducted on ore pulp in the flotation column through the multiple stages of air distribution units, the flotation environment which is suitable for coarse grain flotation and is small in fluid disturbance and sufficient in microbubble content is constructed, and then efficient separation of coarse slime is achieved.

Description

technical field [0001] The invention relates to the technical field of mineral separation and recovery, in particular to a coarse particle fluidized flotation device and method for gradient air intake. Background technique [0002] With the widespread application of mechanized mining technology, the fine-grained (-3mm) content of the raw coal selected by the coal preparation plant is increasing year by year. However, the common equipment such as pumps and pipelines in the coal preparation process today, the coal is subjected to two secondary steps in the sorting process. Secondary crushing further increases the fine-grained content in the selected raw coal. [0003] For the -3mm fine-grained grade in the selected raw coal, the current process is generally classified with 0.25mm as the boundary, -0.25mm is fine slime, and 0.25-3mm is generally used as coarse slime. Flotation is currently the most effective separation method for fine particle size. This method is based on the...

Claims

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Application Information

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IPC IPC(8): B03D1/02B03D1/14B03D1/24B03D103/08
CPCB03D1/02B03D1/14B03D1/1456B03D1/245B03D2203/08
Inventor 邢耀文桂夏辉张友飞曹亦俊刘炯天徐梦迪丁世豪何琦尹青临
Owner CHINA UNIV OF MINING & TECH
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