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A flotation method for low-grade collophosphate ore with dense massive structure

A block-shaped, low-grade technology, applied in solid separation and other directions, can solve the problems of large fluctuation of flotation index and large consumption of flotation reagents, and achieve the effect of reducing reagent consumption and improving flotation and sorting performance.

Active Publication Date: 2022-07-29
YUNNAN PHOSPHATE CHEM GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a flotation method for low-grade collophanite with a dense block structure, which solves the problems of large consumption of flotation reagents and large fluctuations in flotation index caused by low slurry concentration in the existing flotation process

Method used

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  • A flotation method for low-grade collophosphate ore with dense massive structure
  • A flotation method for low-grade collophosphate ore with dense massive structure
  • A flotation method for low-grade collophosphate ore with dense massive structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] For the collophosphate rock with dense block structure accounting for 60%, stripe structure accounting for 30%, and other structure types accounting for 10%, P 2 O 5 Content 21%~22%, MgO content 5%~6%, MgO / P 2 O 5 =0.167~0.50, SiO 2 The content is 13% to 15%, and the crushing ratio is greater than 60.

[0026] Mineral monomer dissociation is achieved through multi-stage crushing and grinding, and the pulp concentration is controlled to be 20% to 24%. Swirl classification is carried out on the pulp, and the content of the classification overflow fineness-0.074mm is 75-85%. The graded bottom flow sediment is returned to the mill for regrinding, and the sand return ratio is 300% to 350%.

[0027] The classification overflow is concentrated by a cyclone, and the inlet pressure of the cyclone is set to 0.1-0.15MPa. The dense ore pulp with a concentration of 26% to 28% is obtained, and the dense ore pulp is fed into the primary sizing tank, and inorganic acid is added t...

Embodiment 2

[0030] For the collophosphate rock with dense block structure accounting for 40%, stripe structure accounting for 40%, and other structure types accounting for 20%, P 2 O 5 Content 21%~22%, MgO content 5%~6%, MgO / P 2 O 5 =0.167~0.50, SiO 2 The content is 13% to 15%, and the crushing ratio is greater than 60.

[0031] Mineral monomer dissociation is achieved through multi-stage crushing and grinding, and the pulp concentration is controlled to be 20% to 25%. Swirl classification is carried out on the pulp, and the content of the classification overflow fineness-0.074mm is 85-95%. The graded bottom flow sediment is returned to the mill for regrinding, and the sand return ratio is 320% to 380%.

[0032] The classification overflow is concentrated by a cyclone, and the inlet pressure of the cyclone is set to 0.1-0.15MPa. The dense ore pulp with a concentration of 28% to 30% is obtained, the dense ore pulp is input into the primary sizing tank, the mineral acid is added for 0...

Embodiment 3

[0035] For the collophosphate rock with dense block structure accounting for 50%, stripe structure accounting for 30%, and other structure types accounting for 20%, P 2 O 5 Content 21%~22%, MgO content 5%~6%, MgO / P 2 O 5 =0.167~0.50, SiO 2 The content is 13% to 15%, and the crushing ratio is greater than 60.

[0036] Mineral monomer dissociation is achieved through multi-stage crushing and grinding, and the pulp concentration is controlled to be 20% to 25%. Swirl classification is carried out on the pulp, and the content of the classification overflow fineness-0.074mm is 80-85%. The graded bottom flow sediment is returned to the mill for regrinding, and the sand return ratio is 300% to 400%.

[0037]The classification overflow is concentrated by a cyclone, and the inlet pressure of the cyclone is set to 0.1-0.15MPa. The dense ore pulp with a concentration of 28% to 30% is obtained, the dense ore pulp is input into the primary sizing tank, the mineral acid is added for 0....

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Abstract

The invention discloses a flotation method for low-grade collophosphate ore with a dense block structure, and relates to the technical field of flotation of dense block collophosphate ore. The flotation method firstly crushes and grinds low-grade collophosphate ore ore with a dense block structure to achieve the dissociation of mineral monomers, and controls the concentration of the pulp to be 18% to 24%; The content of the degree-0.074mm is 70%-90%, and the classified underflow sediment is returned to the mill for regrinding, and the return sand ratio is 300%-400%; then the classified overflow is concentrated to the pulp to obtain a concentration of 26%-32%. Dense ore pulp: input the dense ore pulp into the primary sizing tank, add inorganic acid for 0.5-1min, and then enter the secondary sizing tank, add collector for mineralization and sizing for 2-3 minutes, and then carry out aerated flotation. By increasing the concentration equipment, the concentration of the pulp is increased. Under the same feeding rate, the concentration of the agent in the pulp is increased from 70-100ppm to 110-130ppm, and the total flotation time is increased by more than 6 minutes. The flotation tailings P 2 O 5 The content is reduced by 1 to 3%, and the consumption of medicine is reduced by 20 to 30%.

Description

technical field [0001] The invention relates to the technical field of flotation of dense block collophosphate ore, in particular to a flotation method for low-grade collophosphate ore with dense block structure. Background technique [0002] As a non-renewable resource, phosphate rock is an important component in agricultural fertilizers and phosphorus-based chemicals. With the development of the economy, the demand for phosphate rock continues to grow rapidly. Although my country is a country with large phosphate rock resources, among the proven phosphate rock, sedimentary phosphate rock (colloid phosphate rock) is the main type, accounting for 80% of the total, and most of them are medium and low-grade collophosphate rock. The quasi-like ore has the characteristics of low grade, complex structure, fine embedded particle size and difficult dissociation. Moreover, with the continuous mining and utilization of phosphate rock resources, the properties of the ore are becoming...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B9/00
CPCB03B9/00
Inventor 杨稳权张华蔡忠俊何海涛庞建涛肖喆赵凤婷夏敬源张路莉杜雄雁彭桦
Owner YUNNAN PHOSPHATE CHEM GROUP CORP
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