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

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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

The invention discloses a method for performing phosphate ore flotation magnesium removal by using a chelating inhibitor PBTCA, and belongs to the field of salt mineral flotation separation. Accordingto the method, water is added for size mixing and the pH value is adjusted, then a chelating inhibitor PBTCA (2-phosphonobutane-1, 2, 4-tricarboxylic acid) is added, direct flotation is carried out to remove magnesium, and the obtained flotation product is dried to obtain low-magnesium phosphate concentrate, wherein the P2O5 recovery rate is 77.54-84.31 percent by weight, and the removal rate ofMgO in the low-magnesium phosphate concentrate is 74.06-83.08 percent by weight. According to the method, the chelating inhibitor PBTCA is added to selectively inhibit dolomite flotation, so that thedifference between the flotation performance of apatite and the flotation performance of dolomite is enlarged, and effective separation of apatite and dolomite is achieved through a direct flotation method. In addition, the chelating inhibitor PBTCA has the advantages of being biodegradable, non-toxic, high in selectivity, low in cost and easy to obtain commercially, and the purpose of high-magnesium low-grade phosphate ore flotation magnesium removal can be achieved.

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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