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Method for improving fine particle mineral flotation efficiency

A mineral flotation and fine particle technology, applied in flotation, solid separation, etc., to achieve the effect of improving flotation efficiency, increasing adhesion, and lower cost

Inactive Publication Date: 2010-09-22
CENT SOUTH UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the optimal flotation particle size of the slurry introduced by the froth flotation method currently used is 75-5 μm, and there is nothing that can be done for minerals with a particle size of less than 5 μm

Method used

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  • Method for improving fine particle mineral flotation efficiency
  • Method for improving fine particle mineral flotation efficiency
  • Method for improving fine particle mineral flotation efficiency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A certain quartz rock hematite, the slurry concentration is 30%, using the traditional foam method (oxidized paraffin soap collector 600 g / ton, tall oil 200 g / ton, regulator sodium carbonate 200 g / ton, temperature is 36 ~ 40 ℃, stirring 20min) the recovery rate of the iron that obtains is 77.2%, the grade of concentrate is 61.4%. Adopt the present invention (450 grams / ton of oxidized paraffin soap collector, 100 grams / ton of tall oil, 20 liters / ton of isoamyl alcohol oil phase, temperature is 36~40 ℃, stirs 20min), the average particle size in pulp is At 1 μm, the effect is the best, the recovery rate of obtained iron is 78.3%, which is 1.1% higher, and the grade of concentrate is 63.5%, which is 2.1% higher. Although at a particle size of 0.5 μm, the recovery rate can reach 79%, but the grade of the mineral is reduced to 62.8% (still better than the traditional froth flotation). (join figure 2 )

Embodiment 2

[0038] A copper-sulphide ore, the pulp concentration is 15%, using the traditional foam method (butyl xanthate collector 180 g / ton, terpineol foaming agent 65 g / ton, regulator quicklime 15 g / ton, stirring for 20 minutes) The recovery of copper obtained was 90% and the grade of the concentrate was 20.7%. Adopt the present invention (butyl xanthate collector 100 grams / ton, ethylbenzene 20 liters / ton, stir 20min), when the average particle size of ore pulp is 20 μ m ( image 3 ), the recovery efficiency and the grade of the ore are the best, the recovery rate of the obtained copper is 91.4%, an increase of 1.4%, and the grade of the concentrate is 21.6%, an increase of 0.9%. From image 3It can also be seen in the figure that when the average particle size of the pulp is 50 μm, the recovery rate of copper obtained is 91.4%, but the grade of the concentrate drops to 21.2%. With the reduction in particle size, recovery remains high at 93%, but the grade of the concentrate has dec...

Embodiment 3

[0040] For a white lead ore, the pulp concentration is 20%, and the mineral recovery rate obtained by traditional foam method (butyl xanthate collector 150 g / ton, isoamyl alcohol foaming agent 50 g / ton, stirring for 20 minutes) is 87.20% ; The grade of the obtained concentrate is 40.28%. Adopt the present invention (butyl xanthate collector 1 gram equivalent / ton, toluene 20 liters / ton, stir 20min), when the average particle size of ore pulp is 0.7~1 μm ( Figure 4 ), the recovery efficiency and ore grade reached the best, the obtained mineral recovery rate was 89.4%, an increase of 2.37%; the grade of the obtained concentrate was 41%-41.47%, an increase of 0.82%-1.19%. With the increase of particle size, the recovery rate and ore grade decreased, but still better than froth flotation. When the particle size is 70μm, the grade of ore is not as good as that of froth flotation.

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Abstract

The invention provides a technical method, which can be generally suitable for improving mineral flotation efficiency. For ore pulp with a given concentration, a target mineral can be accumulated on a water / oil interface by adding an appropriate flotation agent and oil in turn into the ore pulp and emulsifying the ore pulp by using an emulsifying machine, so that both the recovery rate and grade of the mineral can be enhanced. The method of the invention is substantially different from a conventional whole-oil floatation method and improves the flotation efficiency by using the synergistic action of the floatation agent and the oil; and the particle size range of selectable minerals is enlarged and oil can be recycled. The method has the advantages of simple operation, high efficiency and easy industrial production.

Description

Technical field: [0001] The invention relates to a generally applicable method for improving the flotation efficiency of fine-grained minerals, especially minerals with a particle size of less than 5 μm. Background technique: [0002] Minerals are non-renewable resources, and their consumption increases with the development of the economy. Flotation as an industrial-scale mineral processing method has always been a key factor affecting the efficiency of mining production. The improvement of flotation efficiency can select high-grade concentrates from lean ores, expand the utilization range of mineral resources, and turn some deposits that were considered undevelopable in the past into deposits with industrial mining value. [0003] The development of flotation technology has gone through the following stages: [0004] Full oil flotation method - According to the difference of lipophilicity and hydrophilicity of various minerals, add a large amount of oil and stir with the ...

Claims

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Application Information

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IPC IPC(8): B03D1/00
Inventor 唐新村李永军梁大勇
Owner CENT SOUTH UNIV
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