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Application of an inhibitor acrylic acid-maleic acid copolymer sodium salt in phosphate rock flotation magnesium removal

A technology of acrylic acid and acrylic acid copolymer, which is applied in the field of salt mineral flotation separation and phosphate rock flotation demagnesia, which can solve the problems affecting the comprehensive utilization of low-grade phosphate rock and the low separation efficiency of apatite and dolomite , High magnesium impurity content in phosphate concentrate, achieve good selective inhibition, easy commercial acquisition, and improve the effect of sorting indicators

Inactive Publication Date: 2021-01-01
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the phosphate rock reverse flotation process has been successfully applied to the efficient desilication of phosphate rock, there are still great difficulties in the flotation separation of phosphate rock containing a large amount of carbonate minerals.
At present, the development of high-magnesium and low-grade phosphate rock has always been the focus of phosphorus resource development, but high-magnesium and low-grade phosphate rock has apatite [Ca 5 (PO 4 ) 3 (F,Cl,OH)] and dolomite [(Ca,Mg)(CO 3 ) 2 ] closely associated characteristics, in the flotation separation process, because apatite and dolomite have similar physical and chemical properties, the fatty acid collectors widely used in industry have poor flotation selectivity for the two minerals, resulting in apatite and dolomite The efficiency of dolomite separation is low, and the content of magnesium impurities in phosphate concentrate is high, which seriously affects the comprehensive utilization of low-grade phosphate rock

Method used

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  • Application of an inhibitor acrylic acid-maleic acid copolymer sodium salt in phosphate rock flotation magnesium removal

Examples

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Effect test

Embodiment 1

[0044] The application of a kind of inhibitor acrylic acid maleic acid copolymer sodium salt in phosphate rock flotation demagnesia, the process flow chart of its implementation is as follows figure 1 As shown, it specifically includes the following steps:

[0045] Step 1: Grinding

[0046] The high-magnesium and low-grade phosphate ore lumps are crushed by the jaw crusher and then by the roller crusher to less than 2mm, and then ground by a ceramic ball mill to obtain phosphate rock powder; among them, for phosphate rock powder , the mass of phosphate rock powder less than 74 μm accounts for 70% of the total mass of phosphate rock powder;

[0047] Step 2: Blending

[0048] Under the condition of 22°C, put the above-mentioned phosphate rock powder into the flotation equipment-flotation machine, add deionized water, stir and adjust the slurry for 2 minutes, and obtain the phosphate rock slurry; wherein, in the phosphate rock slurry, the phosphate rock The mass percentage con...

Embodiment 2

[0055] The application of a kind of inhibitor acrylic acid maleic acid copolymer sodium salt in phosphate rock flotation demagnesia, specifically comprises the following steps:

[0056] Step 1: Grinding

[0057] The high-magnesium and low-grade phosphate ore lumps are crushed by the jaw crusher and then by the roller crusher to less than 2mm, and then ground by a ceramic ball mill to obtain phosphate rock powder; among them, for phosphate rock powder , the mass of phosphate rock powder less than 74 μm accounts for 80% of the total mass of phosphate rock powder;

[0058] Step 2: Blending

[0059] Under the condition of 23°C, put the above-mentioned phosphate rock powder into the flotation equipment-flotation machine, add deionized water, stir and adjust the slurry for 2 minutes, and obtain the phosphate rock slurry; wherein, in the phosphate rock slurry, the phosphate rock The mass percentage concentration is 25%; then add a strong alkali NaOH aqueous solution with a mass per...

Embodiment 3

[0066] The application of a kind of inhibitor acrylic acid maleic acid copolymer sodium salt in phosphate rock flotation demagnesia, specifically comprises the following steps:

[0067] Step 1: Grinding

[0068] The high-magnesium and low-grade phosphate ore lumps are crushed by the jaw crusher and then by the roller crusher to less than 2mm, and then ground by a ceramic ball mill to obtain phosphate rock powder; among them, for phosphate rock powder , the mass of phosphate rock powder particles smaller than 74 μm accounts for 75% of the total mass of phosphate rock powder;

[0069] Step 2: Blending

[0070] Under the condition of 20°C, put the above-mentioned phosphate rock powder into the flotation equipment-flotation machine, add deionized water, stir and adjust the slurry for 2 minutes, and obtain the phosphate rock slurry; wherein, in the phosphate rock slurry, the phosphate rock The mass percentage concentration is 30%; then add a strong alkali NaOH aqueous solution wi...

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Abstract

The application of an inhibitor, acrylic acid maleic acid copolymer sodium salt, in the flotation demagnesization of phosphate rock belongs to the field of flotation separation of salt minerals. In this application, the inhibitor acrylic maleic acid copolymer sodium salt (MA‑AA·Na) is used in the flotation demagnesization process of phosphate ore. In the process of removing dolomite by positive flotation of phosphate ore, it is added Inhibitor acrylic acid maleic acid copolymer sodium salt; among which, the dosage of inhibitor acrylic acid maleic acid copolymer sodium salt in phosphate rock slurry is 120-180g / t; the mass percentage concentration of phosphate rock slurry is 20-30 %. Based on the difference in the floatability of the useful mineral apatite and the gangue mineral dolomite in the phosphate rock using the sodium salt of the inhibitor acrylic acid maleic acid copolymer to strengthen the magnesium carbonate mineral in the phosphate rock - Dolomite removal improves the quality of phosphate concentrate products and can provide new and efficient inhibitors for positive flotation demagnesization of high-magnesium and low-grade phosphate ores.

Description

technical field [0001] The invention belongs to the field of flotation separation of salt minerals, specifically relates to the technical field of flotation demagnesization of phosphate rocks, in particular to the application of an inhibitor acrylic acid maleic acid copolymer sodium salt in flotation demagnesization of phosphate rocks. Background technique [0002] my country is relatively rich in phosphate rock resources, and its ore reserves rank second in the world, but there are few high-grade phosphate rock resources, mainly medium and low-grade phosphate rock, and the mineral composition is complex and diverse, making it difficult to sort. Phosphorus-containing minerals in phosphate rock mainly exist in the state of apatite, and gangue minerals are mainly divided into two categories: silicate minerals and carbonate minerals. In recent years, high-grade phosphate rock has gradually decreased, and the development and utilization of low-grade phosphate rock has attracted ...

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 杨斌朱张磊盛秋月印万忠唐远宋宁波曹少航姚金
Owner NORTHEASTERN UNIV LIAONING
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