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Collophanite reverse flotation depressing agent and application thereof

A reverse flotation and depressant technology, applied in flotation, solid separation, etc., can solve the problems of equipment calcium accumulation and pipeline blockage, low recovery rate, low selectivity, etc., to overcome calcium accumulation and pipeline blockage, reduce Mineral dressing cost, good product quality effect

Inactive Publication Date: 2014-07-09
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country is rich in phosphate rock resources, but 70-80% are medium and low-grade collophosphine. Due to the complex mosaic relationship of various minerals, fine particle size, poor dissociation, and the content of carbonate minerals, etc. characteristics, its development and utilization is a worldwide problem
In the traditional process of phosphate rock reverse flotation magnesium removal, sulfuric acid and phosphoric acid are used as reverse flotation inhibitors. There are large amounts of sulfuric acid and phosphoric acid. The amount of sulfuric acid reaches 12-24kg / t raw ore, and the amount of phosphoric acid is 3-6kg / t Raw ore, poor inhibition, low selectivity, low recovery rate, making the cost of beneficiation high
In production, a large amount of sulfuric acid is likely to cause calcium accumulation in equipment and blockage of pipelines

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh P 2 o 5 100g of industrial phosphoric acid with a mass percentage of 20% and P 2 o 5 400g of phosphorus pentoxide powder (oxide of yellow phosphorus) with a mass percentage of 95%.

[0029] Stir and heat industrial phosphoric acid to 90°C with a stirring speed of 1000r / min, continuously add phosphorus pentoxide powder, add 400g of phosphorus pentoxide powder in 0.5h, and stir for 1.0h to obtain collophanite reverse flotation inhibition agent.

[0030] Configure the above inhibitors into 5g / L aqueous solution for P 2 o 5 The grade is 25.35%, and the MgO content is 2.73% in the forward and reverse flotation of phosphate rock. After the raw ore is ground, the foam product is obtained through direct flotation. Add 2.5kg / t of raw ore sulfuric acid as a pH regulator to the foam, and stir for 2 minutes. Then add the inhibitor aqueous solution prepared by the above method, the inhibitor dosage is 1.5kg / t raw ore, stir for 2 minutes, do not add collector, carry out f...

Embodiment 2

[0036] Weigh P 2 o 5 100g of industrial phosphoric acid and P with a mass percentage of 40% 2 o 5 200g of phosphorus pentoxide powder (oxide of yellow phosphorus) with a mass percentage of 95%.

[0037] Stir and heat the industrial phosphoric acid to 100°C, the stirring speed is 900r / min, continue to add phosphorus pentoxide powder, add 200g of phosphorus pentoxide powder in 0.5h, stir for 45min and then get collophanite reverse flotation inhibitor .

[0038] Configure the above inhibitors into 6g / L aqueous solution for P 2 o 5 The grade is 27.33%, and the MgO content is 6.19% in the direct and reverse flotation of phosphate rock. After the raw ore is ground, the foam product is obtained through direct flotation, and 5.0kg / t of raw ore sulfuric acid is added to the foam as a pH regulator, and stirred for 2 minutes. Add the inhibitor aqueous solution prepared by the above method again, the inhibitor consumption is 1.0kg / t raw ore, stir 2min, add the fatty acid anion type ...

Embodiment 3

[0044] Weigh P 2 o 5 The mass percentage content of 85% industrial phosphoric acid 100g and P 2 o 5 100g of phosphorus pentoxide powder (oxide of yellow phosphorus) with a mass percentage of 95%.

[0045] Stir and heat the industrial phosphoric acid to 110°C, the stirring speed is 800r / min, continue to add phosphorus pentoxide powder, add 100g of phosphorus pentoxide powder in 0.5h, stir for 30min and then get the reverse flotation inhibitor of collophanite .

[0046] Configure the above inhibitors into 10% g / L aqueous solution for P 2 o 5 The grade is 25.11%, and the MgO content is 3.46% in the forward and reverse flotation of phosphate rock. After the raw ore is ground, the foam product is obtained through direct flotation. Add 3.6kg / t of raw ore sulfuric acid as a pH regulator to the foam, and stir for 2 minutes. Add the inhibitor aqueous solution that above-mentioned method prepares again, inhibitor consumption is 1.33kg / t raw ore, stirs 2min, and adding consumption ...

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Abstract

The invention discloses a collophanite reverse flotation depressing agent and an application thereof. The collophanite reverse flotation depressing agent is prepared by use of a method which comprises the steps of heating phosphoric acid to the range from 90 to 110 DEG C, continuously adding phosphorus pentoxide and stirring for dispersing, and after finishing adding, preserving heat and continuing stirring for 0.5-1.0 hour to obtain the collophanite reverse flotation depressing agent, wherein a mass ratio of the phosphoric acid to the phosphorus pentoxide is 1: 1 to 1: 4, the concentration of the phosphoric acid is that the mass percent content of P2O5 is 20-85wt%, the phosphorus pentoxide powder is the oxides of yellow phosphorus, and the mass percent content of P2O5 of the phosphorus pentoxide powder is more than 95wt%. The depressing agent has strong selective depression effect relative to single phosphoric acid or sulfuric acid, and thus is low in dosage in flotation, and meanwhile, the dosage of the phosphoric acid or the sulfuric acid also can be reduced. The collophanite reverse flotation depressing agent overcomes the shortcomings of calcium scaling and pipe blockage due to high dosage of the phosphoric acid or the sulfuric acid, and high flotation cost of a traditional process.

Description

technical field [0001] The invention belongs to the technical field of phosphate rock flotation, and in particular relates to a collophosite reverse flotation inhibitor and an application thereof. Background technique [0002] Phosphate rock is an essential basic raw material for the production of phosphate fertilizers and phosphorus chemical products. my country is rich in phosphate rock resources, but 70-80% are medium and low-grade collophosphine. Due to the complex mosaic relationship of various minerals, fine particle size, poor dissociation, and the content of carbonate minerals, etc. characteristics, its development and utilization is a worldwide problem. In the traditional process of phosphate rock reverse flotation magnesium removal, sulfuric acid and phosphoric acid are used as reverse flotation inhibitors. There are large amounts of sulfuric acid and phosphoric acid. The amount of sulfuric acid reaches 12-24kg / t raw ore, and the amount of phosphoric acid is 3-6kg / ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/002B03D101/06
Inventor 罗惠华王玉林钟康年
Owner WUHAN INSTITUTE OF TECHNOLOGY
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