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A kind of positive flotation magnesium removal inhibitor of phosphate rock and its application method

An inhibitor and positive flotation technology, which is applied in flotation, solid separation, etc., can solve the problems that are not conducive to large-scale production and use, long inhibitor preparation time, complex flotation process, etc., to achieve easy large-scale promotion, excellent Suppression effect, low separation cost

Active Publication Date: 2022-03-04
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In terms of dolomite inhibitors, Chinese patent CN103691574A reports "a preparation method and application of dolomite inhibitors". This method uses: sulfuric acid, hydrochloric acid, benzoic acid, sulfate and other raw materials to prepare dolomite inhibitors. This method Inhibitors take a long time to prepare, and the cost of the agent is high and toxic, which is not conducive to large-scale production and use
Chinese patent CN87101820A reports "a preparation method of a novel dolomite inhibitor calcium lignosulfonate sulfomethylated derivatives for phosphate rock flotation", the method uses calcium lignosulfonate as raw material, in the presence of sulfuric Under the condition of acidification and decalcification, the dolomite inhibitor is prepared by sulfomethylation reaction with formaldehyde and sodium sulfite. The preparation conditions are complex and the process is long.
This method reduces the amount of sulfuric acid, but the flotation process is more complicated
Chinese patent CN107029896A reports "a kind of flotation process for separating and enriching apatite, dolomite and quartz in phosphate rock". This method improves the conventional positive-reverse phosphate rock flotation process. But the flotation process is complicated

Method used

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  • A kind of positive flotation magnesium removal inhibitor of phosphate rock and its application method
  • A kind of positive flotation magnesium removal inhibitor of phosphate rock and its application method
  • A kind of positive flotation magnesium removal inhibitor of phosphate rock and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 2g of dolomite and apatite single minerals with a particle size of +38-74μm for flotation respectively, take 50mL of distilled water and add it to a 70mL hanging tank flotation machine, stir and adjust the slurry at a speed of 1300r / min to fully disperse the slurry .

[0027] Adjust the pH of the pulp to 9, according to figure 1 Add the medicament to the medicament system, stir for 3 minutes and 5 minutes after adding the medicament, the inhibitor is sodium alginate: cassia seed gum = 88:12, the concentrations are 0, 3, 5, 10, 20, 40, 80, 140, 160mg / L; the collector is sodium oleate (60.8mg / L), and after the stirring is completed, it will be aerated and floated to obtain foam products and tailings.

[0028] Filter, dry and weigh the foam product and tailings respectively, and calculate the floating rate, the result is as follows: figure 2 shown.

[0029] It can be seen that as the inhibitor concentration increases, the floating rate of apatite decreases slightl...

Embodiment 2

[0031] Take 2g of apatite and dolomite single minerals with a particle size of +38-74μm for flotation respectively, take 50mL of distilled water and add it to a 70mL hanging tank flotation machine, stir and adjust the slurry at a speed of 1300r / min to fully disperse the slurry.

[0032] The order of adding the medicaments is as follows: figure 1 As shown, sequentially add 20mg / L inhibitor (sodium alginate: cassia seed gum =90:10), and the collector is sodium oleate (60.8mg / L). After adding the agent, stir for 3 minutes and 5 minutes in turn. Adjust the pH of the ore slurry to 6.5, 7.8, 9.0, 9.8, 10.8, 11.8 before adding chemicals, and after the stirring is completed, aerate flotation to obtain foam products and tailings.

[0033] Filter, dry and weigh the foam product and tailings respectively, and calculate the floating rate, the result is as follows: image 3 shown.

[0034] It can be seen that in the pH range of 7.5-11.5, the floating rate of apatite is basically maintain...

Embodiment 3

[0036] Take 1.6g and 0.4g of +38-74μm apatite and dolomite single minerals and mix them uniformly according to the ratio of 8:2. Take 50mL of distilled water and add it to a 70mL hanging tank flotation machine, and stir at a speed of 1300r / min Adjust the slurry to allow the slurry to fully disperse.

[0037] The order of adding the medicaments is as follows: figure 1 As shown, the pH of the pulp is adjusted to 9.12 and 10.08 before adding chemicals, and then stirred for 3 minutes and 5 minutes after adding chemicals. (60.8mg / L). After the stirring is completed, air flotation is carried out to obtain foam products and tailings. Dry the foam product and tailings separately, weigh and test the P in the concentrate 5 o 2 , MgO content, calculate P in the concentrate 5 o 2 , The recovery rate of MgO. The result is as Figure 4 shown.

[0038] It can be seen from the examples that when the concentration of the inhibitor is 20 mg / L, the grade of MgO in the concentrate drops ...

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Abstract

The invention discloses a phosphate rock positive flotation magnesium removal inhibitor and a use method thereof, comprising the following components in parts by mass, 70-95 parts of sodium alginate, and 5-30 parts of cassia seed gum. The use method includes the following steps, S1. Mineral raw materials are mixed with water to obtain pulp, and the pH of the pulp is adjusted; S2. Add inhibitor aqueous solution to the pH-adjusted pulp; S3. Inflatable flotation to obtain foam products and tailings. The inhibitor has strong selectivity and less dosage , safe and non-toxic, and can effectively inhibit dolomite during the separation process of apatite and dolomite.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a phosphate rock positive flotation magnesium removal inhibitor and a using method thereof. Background technique [0002] Phosphorus is an important chemical raw material, widely used in metallurgy, food, textile, medicine, national defense and other adjacent fields. According to reports, the total amount of proven phosphate rock resources in my country ranks first in the world, but most of them are medium and low-grade ores with high magnesium carbonate content. Magnesium-containing carbonate impurities will increase the amount of sulfuric acid used in the phosphoric acid production process, and have a negative impact on the filtration rate of phosphoric acid and the production efficiency of phosphoric acid, seriously restricting the production of downstream phosphate products. Due to the similar surface properties of apatite and magnesium-bearing carbona...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/016B03D1/02B03D101/06B03D103/06
CPCB03D1/016B03D1/021B03D2201/06B03D2203/06
Inventor 杨丙桥曾梦媛严海关智文曾龙颜
Owner WUHAN INSTITUTE OF TECHNOLOGY
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