Floatation method and device for coarse-particle floatation column

A flotation column and coarse particle technology, used in flotation, solid separation, etc., can solve the problems of chemical properties that have a great influence on the flotation effect, small contact probability between bubbles and particles, and fine-grained gangue staying in it. Expand the upper limit of flotation particle size, advanced equipment, and improve the effect of pipeline blockage

Active Publication Date: 2017-08-29
GUIZHOU UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the flotation column also has certain limitations: ① Coarse particles are difficult to suspend, the probability of contact between air bubbles and particles is small, and the recovery rate is lost in order to improve the grade. The chemical properties of the pulp have a great influence on the flotation effect. The pulp with high viscosity will lead to extremely poor tailing foam, and it is easy to make the fine-grained gangue stay in it for a long time, thus deteriorating the flotation process; ③ It is necessary to increase the flushing water to improve the concentrate grade , the inflation pipe is easy to block
Therefore, ordinary flotation columns are not very adaptable to ore

Method used

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  • Floatation method and device for coarse-particle floatation column
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  • Floatation method and device for coarse-particle floatation column

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Experimental program
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Effect test

specific Embodiment 1

[0050] The test material is a certain bauxite. Multi-element chemical analysis of raw ore, in which Al 2 o 3 The mass fraction accounts for 62.3%, SiO 2 The quality score accounts for 11.54%. The aluminum-silicon ratio of raw ore is 5.40, which belongs to the typical low-aluminum-silicon ratio bauxite. Crush the raw ore to -3mm and mix well. Grinding until the grinding particle size is -0.074mm accounts for 75%. The analysis results of the grinding particle size are shown in Table 3.

[0051] Table 1 Polychemical analysis results of ore samples (mass fraction) / %

[0052]

[0053] Table 2 Mineral composition of test ore samples / %

[0054]

[0055] Table 3 Grinding particle size composition

[0056]

[0057]

[0058] It can be seen from Table 2 that when the grinding particle size reaches -200 mesh, the particle size accounts for 75%, and the -0.038mm particle size accounts for 27.48%. In terms of bauxite selection, the grinding fineness can be appropriately ...

Embodiment 2

[0066] In the test, 2kg of grinding products were weighed in the mixing tank, and the concentration of the pulp was adjusted to 24%. Sulfuric acid was added to the pulp with the adjusted concentration as a pH regulator and inhibitor, and the collector GJBW was added after stirring for 2 minutes. The pulp is fed into the flotation column by the pulp pump, and the flotation time is 10 minutes, and the foam is scraped every 5 minutes.

[0067] Table 5 Test results of the new flotation column

[0068]

[0069] It can be seen from the grade curve in the figure that with the increase of the grinding fineness, the P in the concentrate 2 o 5 The grade of the ore showed a slow growth trend. When the grinding fineness exceeded 88.53%, the concentrate grade decreased. It can be seen from the recovery curve that with the increase of the grinding fineness, the P in the concentrate 2 o 5The recovery rate showed a trend of first increasing and then decreasing. This is because when th...

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Abstract

The invention discloses a floatation method and device for a coarse-particle floatation column. When the coarse-particle floatation column works, pulp is led in the column from a feeding pipe which is located at the inlet of a column body, and declines gradually along the whole fracture section of the column body, and compressed air with certain pressure is inflated in the column through an air inflation device located on the lower portion of the column body; a large amount of tiny bubbles gradually rise along the whole fracture section of the column body, the pulp and the bubbles form convective motions, and mineral particles and the bubbles make contact with each other sufficiently; by symmetrically arranging cyclic pipelines on the two sides of the column body, the cyclic pipelines communicate with the air inflation device located at the bottom, by opening valves of a certain section of or several sections of cyclic pipelines, with assistance of floatation of the bubbles, floatable coarse particles attached to the bubbles can be conveyed to certain height through the pressure generated by a cyclic pump, and the coarse particles are carried by the bubbles to float to the surface of the pulp and form a foam layer, and the coarse particles automatically spill over as concentrates. Gangue minerals which cannot float falls in the lower portion of the column body, are collected by a cone body part, and then are discharged from a tailing pipe. The floatation device is simple in structure, obvious in effect and high in practicability.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a coarse particle flotation column flotation method and device. Background technique [0002] As the proportion of refractory ores with low grade, fine particle size and complex mineral composition in the field of mineral processing is increasing, the limitations of traditional flotation machines are increasing, such as high energy consumption, serious wear and tear, and inconvenient configuration. Large amount of maintenance etc. Compared with flotation machines, flotation columns have the advantages of high beneficiation efficiency, low investment and production costs, less floor space and installation costs, less chemical consumption, more suitable for fine particle separation and easy automatic control, etc. . It is particularly important to develop high-efficiency and energy-saving flotation columns under the circumstances that the mineral processing industry is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/26
CPCB03D1/26
Inventor 张覃李龙江卯松王玲
Owner GUIZHOU UNIV
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