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Application of an inhibitor hpma in positive flotation demagnesia of phosphate rock

A technology of inhibitor and phosphate rock, which is applied in flotation, solid separation, etc., can solve the problems of increasing the difficulty of phosphorus chemical products, the difficulty of flotation and separation of apatite and dolomite, and the reduction of the grade of phosphorus concentrate, so as to achieve the convenience of industrial Production application, low cost, and the effect of increasing floating difference

Inactive Publication Date: 2021-03-16
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Apatite is a typical phosphorus-containing useful mineral of phosphate rock, but since apatite and gangue dolomite are calcium-containing salt minerals, their similar physical and chemical properties lead to flotation separation of apatite and dolomite difficulty
In addition, phosphate rock is poor, fine, and miscellaneous. Generally, fine grinding is required to achieve monomer dissociation of useful phosphorus minerals. During flotation, fine-grained dolomite easily enters the flotation foam to reduce the grade of phosphorus concentrate. Increase the difficulty of subsequent production of phosphorus chemical products

Method used

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  • Application of an inhibitor hpma in positive flotation demagnesia of phosphate rock
  • Application of an inhibitor hpma in positive flotation demagnesia of phosphate rock
  • Application of an inhibitor hpma in positive flotation demagnesia of phosphate rock

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Effect test

Embodiment 1

[0047] A kind of application of inhibitor HPMA in the positive flotation demagnesization of phosphate rock, comprises the following steps:

[0048] Step 1: Blending

[0049] Put the artificially mixed phosphate rock sample in the flotation equipment-hanging tank flotation machine, add deionized water and inhibitor HPMA solution with a mass concentration of 2g / L, and stir for 3min at the impeller speed of 1800r / min until mixed Uniformly, obtain phosphate rock flotation pulp; Wherein, deionized water and phosphate rock mass ratio are 6:1, and inhibitor HPMA accounts for the mass concentration of phosphate rock flotation pulp to be 40mg / L;

[0050] Step 2: Magnesium removal by positive flotation

[0051] At room temperature (21-25°C), add 1.2% NaOH aqueous solution to the phosphate rock flotation pulp, adjust the pH of the phosphate rock flotation pulp to 11.5, and stir for 2 minutes to obtain a pH value of 11.5 phosphate rock flotation slurry;

[0052] To the phosphate rock f...

Embodiment 2

[0057] A kind of application of inhibitor HPMA in the positive flotation demagnesization of phosphate rock, comprises the following steps:

[0058] Step 1: Blending

[0059] Put the artificially mixed phosphate rock sample in the flotation equipment-hanging tank flotation machine, add deionized water and inhibitor HPMA solution with a mass concentration of 3g / L, and stir for 3min at the impeller speed of 2100r / min until mixed Uniformly, obtain phosphate rock flotation pulp; Wherein, the mass ratio of deionized water and phosphate rock is 6:1, and the mass concentration of inhibitor HPMA accounting for phosphate rock flotation pulp is 60mg / L;

[0060] Step 2: Magnesium removal by positive flotation

[0061] At room temperature (21-25°C), add 0.4% NaOH aqueous solution to the phosphate rock flotation pulp, adjust the pH of the phosphate rock flotation pulp to 8.5, and stir for 2 minutes to obtain a pH value of 8.5 phosphate rock flotation slurry;

[0062] To the phosphate roc...

Embodiment 3

[0065] The application of a kind of inhibitor HPMA in the positive flotation magnesification of phosphate rock, the process flow diagram of its application is shown in figure 1 , including the following steps:

[0066] Step 1: Grinding

[0067] Crushing and grinding high-magnesium and low-grade phosphate rock to obtain phosphate rock powder; wherein, in the phosphate rock powder, the mass of the phosphate rock powder with a particle size of ≤74 μm accounts for 75% of the total mass of the phosphate rock powder;

[0068] Step 2: Blending

[0069] Put the above-mentioned phosphate rock powder in the flotation equipment—single-cell flotation machine, add deionized water and inhibitor HPMA solution with a mass concentration of 4g / L, stir at the impeller speed of 1900r / min for 3min until mixed evenly, and obtain Phosphate rock flotation pulp; wherein, the mass ratio of deionized water and phosphate rock is 4:1, and the mass concentration of inhibitor HPMA in the phosphate rock fl...

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Abstract

The application of HPMA, a highly efficient inhibitor, in the positive flotation demagnesization of phosphate ore belongs to the field of phosphate ore beneficiation and purification technology. The application is to use the high-efficiency inhibitor HPMA in the process of positive flotation of phosphate ore to remove the gangue mineral dolomite. Dissolve the highly efficient inhibitor HPMA in water and prepare an inhibitor HPMA solution with a mass concentration of 2 to 4 g / L for use in the preparation of phosphate rock flotation slurry. Under the sodium oleate or oleic acid flotation system, the flotation of the phosphorus mineral (apatite) and gangue mineral (dolomite) in the phosphate rock is increased by adding the highly efficient inhibitor HPMA (hydrolyzed polymaleic anhydride). It is used to remove magnesium-containing minerals (dolomite) from phosphate ores, reduce magnesium impurities, and improve the quality of low-magnesium phosphate concentrate products, especially to provide a new flotation efficiency for the flotation separation of high-magnesium and low-grade phosphate ores. Inhibitors.

Description

technical field [0001] The invention relates to the technical field of phosphate rock beneficiation and purification technology, in particular to the application of an inhibitor HPMA in positive flotation demagnesization of phosphate rock. Background technique [0002] In the separation and purification process of phosphate rock, reducing the MgO content of phosphate concentrate is the key to improving the quality of phosphate rock products. The main source of MgO impurities in phosphate rock is dolomite, a magnesium-containing carbonate mineral. Apatite is a typical phosphorus-containing useful mineral of phosphate rock, but since apatite and gangue dolomite are calcium-containing salt minerals, their similar physical and chemical properties lead to flotation separation of apatite and dolomite difficulty. In addition, phosphate rock is poor, fine, and miscellaneous. Generally, fine grinding is required to achieve monomer dissociation of useful phosphorus minerals. During ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03D1/008B03B9/00B03D101/06B03D103/06
CPCB03B9/00B03D1/00B03D1/008B03D2201/06B03D2203/06
Inventor 杨斌孙浩然班小淇印万忠韩会丽姚金曹少航徐东
Owner NORTHEASTERN UNIV LIAONING
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