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Phosphate dense medium mineral separation and direct-reverse floatation combined technology

A positive and negative flotation, dense medium technology, applied in flotation, solid separation, wet separation, etc., can solve the problems of phosphorus resource loss, silted river course, large quantity, etc., and achieve the effect of improving utilization rate and reducing discharge

Inactive Publication Date: 2014-01-01
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional phosphate ore heavy media beneficiation will produce a large amount of tailings. These tailings are not only large in number, but also contain a certain amount of useful components. If they are discharged randomly, they will not only cause the loss of phosphorus resources, but also occupy a large amount of land and increase the coverage of fertile land. area, silting up the river, causing serious environmental pollution

Method used

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  • Phosphate dense medium mineral separation and direct-reverse floatation combined technology

Examples

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Effect test

Embodiment 1

[0029] In this example, the combined process of dense medium beneficiation and positive and negative flotation is carried out on the phosphate rock with a raw ore grade of 19.40%. For the process flow, see figure 1 , the specific process steps are as follows:

[0030] (1) Dense media beneficiation process:

[0031] a. The grade of raw phosphate rock is 19.40%. The raw ore 1 enters the first stage of crushing process (coarse crushing 2) from the hopper for coarse crushing until it reaches -60mm, and the crushed product enters the second stage of crushing process (fine crushing 3). Finely crushing, sieve the finely crushed products to obtain the oversize material larger than 15mm, the coarse particle raw ore of 1~15mm and the undersize raw ore less than 1mm, and the oversize material larger than 15mm is returned to the second stage of crushing process again Carry out fine crushing, and the product under the 1~15mm sieve enters the mineral medium with a density of 2300kg / m 3...

Embodiment 2

[0040] The raw ore grade of this embodiment is 20.2%, and the flow chart of the combined process of phosphate rock heavy media beneficiation and forward and reverse flotation is shown in figure 1 , the specific process is roughly the same as in Example 1, the difference being:

[0041] (1) The grade of the dense medium concentrate obtained through the dense medium beneficiation process is 28.2%, and the recovery rate of the dense medium beneficiation process is 55.14%;

[0042] (2) The concentration of the pulp is 32.5%, and the agent and its dosage for positive flotation roughing are: sodium carbonate 6.0kg / t (weight

[0043] Medium tailings), water glass 3.0kg / t (heavy medium tailings), naphthalene derivatives (FDN) 1.0 kg / t (heavy medium tailings), collector (fatty acid soap) 1.5kg / t (heavy medium Tailings), the temperature of positive flotation roughing is 20°C;

[0044] (3) The agent and dosage of positive flotation sweeping are: collector (fatty acid soap) 0.3kg / t (hea...

Embodiment 3

[0051] The raw ore grade of this embodiment is 21.3%. The flow chart of the combined process of phosphate ore heavy media beneficiation and forward and reverse flotation is shown in figure 1 , the specific process is roughly the same as in Example 1, the difference being:

[0052] (1) The grade of the dense medium concentrate obtained through the dense medium beneficiation process is 28.1%, and the recovery rate of the dense medium beneficiation process is 56.20%;

[0053] (2) The concentration of the pulp is 35%, and the agent and its dosage for positive flotation roughing are: sodium carbonate 7.0kg / t (weight

[0054] Medium tailings), water glass 2.0kg / t (heavy medium tailings), naphthalene derivatives (FDN) 1.2 kg / t (heavy medium tailings), collector (fatty acid soap) 2.0kg / t (heavy medium Tailings), the temperature of positive flotation roughing is 15°C;

[0055] (3) The agent and dosage of positive flotation sweeping are: collector (fatty acid soap) 0.7kg / t (heavy medi...

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Abstract

The invention belongs to the technical field of phosphate mineral separation, and perpendicularly relates to a phosphate dense medium mineral separation and direct-reverse floatation combined technology. The technology comprises a phosphate ore coarse particle dense medium mineral separation technology and a direct-reverse floatation technology of levigation of dense medium tailings discharged through a dense medium separation technology. According to the dense medium mineral separation technology, the phosphorus raw ore is broken to coarse particles suitable for dense medium mineral separation, dense medium ore concentrate and dense medium tailings are separated through the dense medium mineral separation technology, the dense medium tailings are ground to the granularity suitable for floatation so that direct floatation and reverse floatation can be conducted, after flotation is completed, the floatation concentrate, the direct floatation tailings and the reverse floatation tailings are obtained, and after the floatation concentrate is combined with the dense medium concentrate, a finished phosphate concentrate product is obtained. According to the phosphate dense medium mineral separation and direct-reverse floatation combined technology, the discharging amount of the tailings after phosphate dense medium mineral separation is reduced, the use rate of phosphate resources is improved, and the maximized use of the phosphate resources of the low level is particularly achieved.

Description

technical field [0001] The invention belongs to the technical field of phosphate rock beneficiation, and in particular relates to a combined process of phosphate rock heavy medium beneficiation and forward and reverse flotation. Background technique [0002] Traditional phosphate ore heavy media beneficiation will produce a large amount of tailings. These tailings are not only large in number, but also contain a certain amount of useful components. If they are discharged randomly, they will not only cause the loss of phosphorus resources, but also occupy a large amount of land and increase the coverage of fertile land. area, silting up river courses and causing serious environmental pollution. Contents of the invention [0003] The object of the present invention is to provide a combined process of phosphate ore heavy medium beneficiation and forward and reverse flotation. The process of the present invention can reduce the discharge of tailings after phosphate ore heavy m...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03D1/00B03D1/004B03D101/06B03D101/02
Inventor 罗惠华汤家焰饶欢欢杨婕池汝安
Owner WUHAN INSTITUTE OF TECHNOLOGY
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