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Flotation method for sulfur in associated pyrites

A pyrite and flotation cell technology, which is applied in the field of beneficiation process and comprehensive utilization of resources, can solve the problems of low sulfur grade and recovery rate of sulfur concentrate, can not affect the recovery of main element iron, and lack of comprehensive recovery technology, etc., to achieve easy Industrial application, significant economic and social benefits, simple effect of process deconstruction

Inactive Publication Date: 2018-06-12
NANJING MEISHAN METALLURGY DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while the high-pyrite ore is effectively desulfurized, the comprehensive recovery technology for recycling the associated pyrite in iron ore is lacking. The comprehensive recovery requirements for the associated pyrite in iron ore cannot affect the recovery of the main element iron, and at the same time Obtain the highest possible technical indicators to maximize economic benefits
[0004] At present, the desulfurization of associated pyrite mostly adopts the flotation process. After the raw ore is ground to a qualified fineness, the flotation agent is added, and through roughing and several stage selection operations, sulfur concentrate and flotation iron concentrate are finally obtained. The sulfur grade of sulfur concentrate is about 30%, and the sulfur recovery rate is between 60% and 70%. Both the sulfur grade and recovery rate of sulfur concentrate are low, which affects the recovery and utilization of sulfur resources.
The sulfur content of flotation iron concentrate fluctuates between 0.35% and 0.55%, which may easily lead to excessive sulfur content in the final iron concentrate and affect the sales of concentrate

Method used

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  • Flotation method for sulfur in associated pyrites

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] according to figure 1 As shown in the process flow, the overflow that has undergone secondary grinding and secondary classification is introduced into the stirring tank through the pipeline, water is added to adjust the pulp concentration to 33%, and isoamyl sodium xanthate is added to the stirring tank at a dosage of 250g / t, stirred for 5 minutes, then added MIBC to the stirred tank, the dosage was 90g / t, stirred for 5 minutes, and the pulp in the stirred tank was introduced into the rougher flotation tank through the pipeline for rougher selection; The dosage of medicine is 60g / t, the dosage of MIBC is 25g / t, and the supplementary dosage of MIBC for the fourth selection is 13g / t. Under the condition of not adding regulator, the first coarse, one sweep, and coarse concentrate are used for regrinding , Four times of beneficiation process, coarse concentrate regrinding concentration is 60%, grinding fineness is -0.043mm content is 88%, total sulfur grade can be obtained...

Embodiment 2

[0027] according to figure 1 As shown in the process flow, the overflow that has undergone secondary grinding and secondary classification is introduced into the stirring tank through the pipeline, water is added to adjust the pulp concentration to 20%, and isoamyl sodium xanthate is added to the stirring tank at a dosage of 250g / t, stirred for 5 minutes, then added MIBC to the stirred tank, the dosage was 90g / t, stirred for 5 minutes, and the pulp in the stirred tank was introduced into the rougher flotation tank through the pipeline for rougher selection; The dosage of medicine is 60g / t, the dosage of MIBC is 25g / t, and the supplementary dosage of MIBC for the fourth selection is 13g / t. Under the condition of not adding regulator, the first coarse, one sweep, and coarse concentrate are used for regrinding , Four times of beneficiation process, coarse concentrate regrinding concentration is 60%, grinding fineness is -0.043mm content is 88.16%, total sulfur grade can be obtai...

Embodiment 3

[0029] according to figure 1 As shown in the process flow, the overflow after the second-stage grinding-secondary classification is introduced into the stirring tank through the pipeline, water is added to adjust the pulp concentration to 33%, and isoamyl sodium xanthate is added to the stirring tank at a dosage of 200g / t, stirred for 5 minutes, then added MIBC into the stirred tank, the dosage was 120g / t, stirred for 5 minutes, and the pulp in the stirred tank was introduced into the rougher flotation tank through the pipeline for rough selection; The dosage of medicine is 50g / t, the dosage of MIBC is 30g / t, and the supplementary dosage of MIBC for the fourth selection is 13g / t. Under the condition of not adding regulator, the first coarse, one sweep, and coarse concentrate are used for regrinding , Four times of beneficiation process, coarse concentrate regrinding concentration is 66%, grinding fineness is -0.043mm content is 88%, total sulfur grade can be obtained is 42.34...

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Abstract

The invention provides a flotation method for sulfur in associated pyrites. The flotation method comprises the following steps that (1) roughing is conducted on a floating raw ore; (2) scavenging is conducted on a roughing bottom flow; (3) regrinding is conducted on roughing concentrate; and (4) four-time concentration is conducted on the roughing concentrate obtained after regrinding, the concentration bottom flow returns back in sequence every time, wherein a certain amount of foaming agent is added in the fourth time of concentration process, and finally sulfur concentrate and iron tailingsare obtained. According to the flotation method for the sulfur in the associated pyrites, the content of the sulfur in iron ore concentrate is reduced, and meanwhile, sulfur concentrate products withthe high quality are obtained; and the recovery rate of sulfur resources is increased, and the flotation method has important practical and theoretical significance for desulfurization of a high sulfur-iron ore and efficient utilization of the sulfur resources.

Description

Technical field: [0001] The invention relates to a method for flotation of sulfur in associated pyrite, which belongs to the technical field of ore dressing technology and resource comprehensive utilization. Background technique: [0002] When iron minerals contain associated pyrite as high pyrite, desulfurization treatment is required. Sulfur content is one of the main indicators to measure the quality of iron ore concentrate. According to the requirements of iron and steel smelting, if the sulfur content in iron ore concentrate increases by 0.1%, the coke ratio will increase by 5%. Ironmaking is disadvantageous, so the lower the sulfur content of the iron concentrate, the better. At the same time, during the smelting process, part of the sulfur in the iron concentrate will be discharged with the furnace gas in the form of gaseous sulfides such as sulfur dioxide, and will accumulate in local areas. When it meets water, it will dissolve in water to form sulfurous acid, and ...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03D1/00
CPCB03B7/00B03D1/00
Inventor 刘永召张祖刚杨龙衣德强刘安平
Owner NANJING MEISHAN METALLURGY DEV
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