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A kind of method that uses chelation inhibitor PBTCA to carry out phosphate rock flotation to remove magnesium

A phosphate rock and inhibitor technology, which is applied in the field of phosphate rock positive flotation and magnesium flotation, can solve the problem of high MgO content in phosphate rock concentrate, which restricts the development and utilization of phosphate rock resources, Exacerbating the excessive consumption of phosphating chemical acid and other problems, achieving the effect of simple process method, reduced equipment corrosion maintenance, and low cost

Inactive Publication Date: 2021-03-23
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because apatite, the main useful phosphorus mineral in phosphate rock, has similar physical and chemical properties to dolomite, a magnesium-containing carbonate mineral, it is difficult to effectively separate it, which seriously restricts the development and utilization of low-grade phosphate rock resources.
At present, fatty acid collectors are widely used in the flotation separation of phosphate rock, but because of their strong collection effect on apatite and dolomite, it is difficult to achieve efficient separation of the two, which leads to the separation of phosphate rock concentrate High MgO content, the presence of magnesium impurities tends to exacerbate excessive consumption of phosphating acid

Method used

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  • A kind of method that uses chelation inhibitor PBTCA to carry out phosphate rock flotation to remove magnesium
  • A kind of method that uses chelation inhibitor PBTCA to carry out phosphate rock flotation to remove magnesium

Examples

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Embodiment 1

[0038]A kind of method that carries out phosphate rock flotation magnesium removal with chelating inhibitor PBTCA, its process flow chart is as figure 1 Shown, comprise the step of following phosphate rock flotation demagnesification:

[0039] Step 1: Blending

[0040] At 20°C, put the phosphate rock in the flotation cell of the XFGII hanging cell flotation machine, add deionized water, wherein, the phosphate rock and deionized water are mixed at a mass ratio of 1:6, and the impeller speed is Stirring and pulping at 1800rpm for 2 minutes; then adding a pH regulator NaOH aqueous solution with a mass percent concentration of 0.5% to the obtained phosphate rock slurry to adjust the pH value of the phosphate rock pulp to 8, and then stirring and pulping for 2 minutes;

[0041] Step 2: Magnesium removal by positive flotation

[0042] Add the chelation inhibitor PBTCA solution with a mass concentration of 2g / L to the phosphate rock slurry with a pH value of 8. The amount of the ch...

Embodiment 2

[0047] A kind of method that carries out phosphate rock flotation magnesium removal with chelating inhibitor PBTCA, comprises the step of following phosphorus rock flotation magnesium removal:

[0048] Step 1: Blending

[0049] At 25°C, the phosphate rock was placed in the flotation cell of the XFGII hanging cell flotation machine, and deionized water was added, wherein the phosphate rock and deionized water were mixed at a mass ratio of 1:6, and the impeller speed was Stirring and pulping at 1900rpm for 2 minutes; then adding a pH regulator NaOH aqueous solution with a mass percent concentration of 1.5% to the obtained phosphate rock slurry to adjust the pH value of the phosphate rock pulp to 9.5, and then stirring and pulping for 2 minutes;

[0050] Step 2: Magnesium removal by positive flotation

[0051] Add the chelation inhibitor PBTCA solution with a mass concentration of 2g / L to the phosphate rock slurry with a pH value of 9.5. The amount of the chelation inhibitor PBT...

Embodiment 3

[0056] A kind of method that carries out phosphate rock flotation magnesium removal with chelating inhibitor PBTCA, comprises the step of following phosphorus rock flotation magnesium removal:

[0057] Step 1: Blending

[0058] At 20°C, put the phosphate rock in the flotation cell of the XFGII hanging cell flotation machine, add deionized water, wherein, the phosphate rock and deionized water are mixed at a mass ratio of 1:6, and the impeller speed is Stirring and pulping at 2100rpm for 2 minutes; then adding a pH regulator NaOH aqueous solution with a mass percentage concentration of 3% to the obtained phosphate rock slurry to adjust the pH value of the phosphate rock pulp to 11.5, and then stirring and pulping for 2 minutes;

[0059] Step 2: Magnesium removal by positive flotation

[0060] Add the chelation inhibitor PBTCA solution with a mass concentration of 2g / L to the phosphate rock slurry with a pH value of 8. The amount of the chelation inhibitor PBTCA accounts for 80...

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Abstract

A method of flotation demagnesization of phosphate rock using chelating inhibitor PBTCA, which belongs to the field of flotation separation of salt minerals. This method uses water to adjust the slurry and pH value, and then adds the chelating inhibitor PBTCA (2-phosphonobutane-1,2,4-tricarboxylic acid) to perform positive flotation and remove magnesium, and the obtained flotation product is dried dry to obtain low magnesium phosphate concentrate, whose P 2 O 5 The recovery rate is 77.54% to 84.31% by weight, and the removal rate of MgO in the low magnesium phosphate concentrate is 74.06% to 83.08% by weight. This method selectively inhibits dolomite flotation by adding the chelating inhibitor PBTCA, expands the difference in flotation performance between apatite and dolomite, and uses positive flotation method to achieve effective separation of apatite and dolomite. In addition, the chelating inhibitor PBTCA is biodegradable, non-toxic, highly selective, low-cost, and easy to obtain commercially, and can achieve the goal of flotation demagnesization of high-magnesium and low-grade phosphate ores.

Description

technical field [0001] The invention relates to a method for demagnesizing phosphate rock by positive flotation, in particular to a method for demagnesizing phosphate rock by flotation using a chelating inhibitor PBTCA, and belongs to the technical field of flotation and separation of salt minerals. Background technique [0002] Phosphorus is one of the most common elements on earth and a fundamental building block of living organisms. At present, the acquisition of phosphorus mainly comes from the development and utilization of phosphate rock. As the main raw material of phosphorus industry, phosphate rock is widely used in agriculture, food, medicine and chemical industry. With the development of modern agriculture, the large consumption of phosphate fertilizers has led to an increase in the demand for high-quality phosphate rock, and the number of high-quality phosphate rock has decreased sharply. Therefore, the development of low-grade phosphate rock resources is an imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03D1/014B03D101/06B03D103/06
CPCB03D1/00B03D1/014B03D2201/06B03D2203/06
Inventor 印万忠杨斌朱张磊曹少航孙浩然姚金唐远胡杰
Owner NORTHEASTERN UNIV LIAONING
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