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A kind of ilmenite activation flotation method

A technology of ilmenite and flotation, applied in flotation, solid separation, etc., can solve the problems of high cost and high energy consumption, and achieve the effects of low cost, simple process and pollution reduction

Active Publication Date: 2021-05-25
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, not all oxidants can achieve this effect. Only specific oxidants can increase the active sites of ferric ions on the surface of ilmenite and increase the adsorption stability of collectors. Microwave, Thermal method, fire method and other methods consume too much energy and cost too much

Method used

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  • A kind of ilmenite activation flotation method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0023] In this embodiment, the secondary titanium concentrate of an ilmenite ore dressing plant is used as an ore sample, and the ore sample TiO 2 Grade 29.11%. Specifically include the following steps:

[0024] (1) Grind the ore sample at 80% ore mass concentration until the dissociation degree of ilmenite monomer is 85%, and the grinding fineness is 74 microns, accounting for 80% of the total grinding amount. Dilute the obtained grinding product with water to 35% ore mass concentration, add sodium hydroxide to adjust the pH of the slurry to 8, add 550g / t sodium hypochlorite, put it into the first mixing bucket, stir at a speed of 1m / s, and stir for 6 minutes , so that the ilmenite and sodium hypochlorite fully undergo redox reactions to form a new surface of ilmenite covered by ferric ions.

[0025] (2) Import the ilmenite slurry obtained in step (1) into the second mixing tank, add 1350g / t sodium oleate, and stir rapidly at a speed of 2.5%m / s for 6min to make the sodium o...

Embodiment 2

[0028] In this embodiment, a certain ilmenite beneficiation plant titanium concentrate is used as an ore sample, and the ore sample TiO 2 Grade 38.62%. Specifically include the following steps:

[0029] (1) Grind the ore sample at 80% ore mass concentration until the dissociation degree of ilmenite monomer is 90%, and the grinding fineness is 74 microns, accounting for 98% of the total grinding amount. Dilute the obtained grinding product with water to 30% ore mass concentration, add sodium hydroxide to adjust the pH of the slurry to 8.5, add 850g / t sodium hypochlorite, put it into the first mixing tank, and stir at a speed of 1.5m / s. 7.5 minutes, so that the redox reaction of ilmenite and sodium hypochlorite fully occurs, forming a new surface of ilmenite covered by ferric ions.

[0030] (2) Import the ilmenite slurry obtained in step (1) into the second mixing tank, add 2200g / t sodium oleate, and stir rapidly at a speed of 2.5%m / s for 7.5min to make the sodium oleate colle...

Embodiment 3

[0033] In this embodiment, a certain low-grade ilmenite is used as an ore sample, and the ore sample TiO 2 Grade 18.38%. Specifically include the following steps:

[0034] (1) Grind the ore sample at 85% ore mass concentration until the dissociation degree of ilmenite monomer is 95%, and the grinding fineness is 74 microns, accounting for 85% of the total grinding amount. Dilute the obtained grinding product with water to 40% ore mass concentration, add sodium hydroxide to adjust the pH of the slurry to 9, add 400g / t sodium hypochlorite, put it into the first mixing bucket, and stir at a speed of 2.5m / s. 6.5 minutes, so that the redox reaction of ilmenite and sodium hypochlorite fully occurs, forming a new surface of ilmenite covered by ferric ions.

[0035] (2) Import the ilmenite slurry obtained in step (1) into the second mixing tank, add 1100g / t sodium oleate, and stir rapidly at a speed of 2.5%m / s for 6.5min to make the sodium oleate collector The groups are fully atta...

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Abstract

The invention relates to a method for activated flotation of ilmenite, which belongs to the technical field of mineral processing. It is characterized in that the steps of the beneficiation process include: grinding the ilmenite ore to the mineral material to basically dissociate the ilmenite mineral and the gangue mineral, adjusting the pH of the ore pulp to 5-10 to provide the most suitable pH for the action of the activator, Sodium hypochlorite is added, which undergoes a redox reaction with iron atoms on the surface of ilmenite, which promotes the formation of a surface covered by ferric ions on ilmenite, and converts the weakly active surface atoms into a large number of active sites that can be stably adsorbed with collector groups point, then add sodium oleate and make its groups adsorb with the active sites on the new surface of ilmenite to form a hydrophobic surface, and then carry out conventional flotation of ilmenite to obtain ilmenite concentrate.

Description

technical field [0001] The invention belongs to the technical field of beneficiation, and in particular relates to an ilmenite activation flotation method. Background technique [0002] The characteristics of "poor, fine and miscellaneous" ilmenite resources are becoming more and more prominent. Gravity separation, magnetic separation and electric separation methods are sometimes helpless. It is sometimes difficult to obtain high-grade and high-recovery ilmenite concentrates by using these methods. The factory adopts gravity separation and magnetic separation methods to obtain only secondary ilmenite concentrates, which increases the difficulty and cost of processing for the subsequent titanium industry, and also causes waste of titanium resources and quality problems of titanium products. And flotation is the most important treatment method to solve fine-grained ilmenite and secondary ilmenite concentrate. The natural buoyancy of ilmenite is not good, coupled with the infl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03D103/02
CPCB03D1/00B03D2203/02
Inventor 邓久帅蔡正鹏蔡教忠吴丹丹刘洋徐宏祥刘文礼文书明刘子龙刘明实
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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