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Oxidation and activation method of ilmenite

An activation method and technology of ilmenite, applied in solid separation, flotation and other directions, can solve the problems of high cost and high energy consumption, and achieve the effect of reducing dosage, improving recovery effect and avoiding pollution

Active Publication Date: 2021-04-09
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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, Energy consumption and cost are too high for thermal and fire methods

Method used

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  • Oxidation and activation method of ilmenite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In this embodiment, the magnetite concentrate of a concentrator in Panzhihua, Sichuan is used as the ore sample, and the ore sample TiO 2 Grade 28.06%. Specifically include the following steps:

[0023] (1) Grind the ore sample at 80% ore mass concentration until the dissociation degree of ilmenite monomer reaches 85%, and the grinding fineness is 74 microns, accounting for 95% of the total grinding amount. Dilute the obtained grinding product with water to 35% ore mass concentration, add sulfuric acid to adjust the pH of the slurry to 6.5, add 550g / t potassium permanganate, put it into the first mixing tank, and stir at a speed of 1m / s. After 6 minutes, the redox reaction between ilmenite and potassium permanganate fully occurs to form a new surface of ilmenite covered by ferric ions.

[0024] (2) Import the ilmenite slurry obtained in step (1) into the second mixing tank, add 1250g / t sodium oleate, and stir rapidly at a speed of 2.5%m / s for 6min to make the sodium o...

Embodiment 2

[0027] In this embodiment, the gravity-selected titanium concentrate of a concentrator in Panzhihua, Sichuan is used as the ore sample, and the ore sample TiO 2 Grade 40.23%. Specifically include the following steps:

[0028] (1) Grind the ore sample at 80% ore mass concentration until the dissociation degree of ilmenite monomer reaches 90%, and the grinding fineness is 74 microns, accounting for 98% of the total grinding amount. Dilute the obtained grinding product with water to 35% ore mass concentration, add sodium bicarbonate to adjust the pH of the slurry to 7, add 700g / t potassium permanganate, put it into the first mixing tank, and stir at a speed of 1.5m / s , the stirring time is 7 minutes, so that the redox reaction of ilmenite and potassium permanganate fully occurs, and a new surface of ilmenite covered by ferric ions is formed.

[0029] (2) Import the ilmenite slurry obtained in step (1) into the second mixing tank, add 2050g / t sodium oleate, and stir rapidly at a...

Embodiment 3

[0032] In this embodiment, a certain ilmenite in Yunnan is used as an ore sample, and the ore sample TiO 2 Grade 16.55%. Specifically include the following steps:

[0033] (1) Grind the ore sample at 85% ore mass concentration until the dissociation degree of ilmenite monomer reaches 88%, and the grinding fineness is 74 microns, accounting for 85% of the total grinding amount. Dilute the obtained grinding product with water to 35% ore mass concentration, add sulfuric acid to adjust the pH of the slurry to 6, add 450g / t potassium permanganate, put it into the first mixing barrel, and stir at a speed of 2.5m / s. The time is 6 minutes, so that the oxidation-reduction reaction of ilmenite and potassium permanganate fully occurs, and a new surface of ilmenite covered by ferric ions is formed.

[0034] (2) Import the ilmenite slurry obtained in step (1) into the second mixing tank, add 850g / t of sodium oleate, and stir rapidly at a speed of 2.5%m / s for 6min to make the sodium oleat...

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Abstract

The invention is a method for oxidizing and activating ilmenite. Grind the raw ilmenite ore or secondary concentrate until the monomers are basically dissociated, add regulators to adjust the pH of the slurry, add potassium permanganate and make it fully undergo redox reactions with ilmenite to form ferric ion coverage The new surface of ilmenite, then add sodium oleate and make its groups fully adhere to and stably adsorb the ferric ion active sites on the new surface of ilmenite to form a hydrophobic surface, and then carry out conventional flotation of ilmenite, Obtain ilmenite concentrate. The method of the invention can make the oxidation-activated ilmenite surface and the collector group undergo stable chemical adsorption, greatly increase the hydrophobicity of the surface, and realize high-efficiency collection.

Description

technical field [0001] The invention belongs to the technical field of ore dressing, and in particular relates to an ilmenite oxidation activation method. Background technique [0002] The ilmenite beneficiation process mainly includes gravity separation, magnetic separation, flotation and electric separation. For iron ore and secondary ilmenite concentrates, flotation becomes one of the most important recovery methods. However, the natural floatability of ilmenite is not good, coupled with the influence of various components in the flotation pulp, and the collector selectivity of many ilmenites is not good, resulting in unsatisfactory grade and recovery rate of ilmenite . Activation can improve the hydrophobicity of minerals or improve the interaction between minerals and collectors, and is an important means to promote the flotation effect of minerals. At present, there are literatures disclosing the method of using lead ions as the activator in ilmenite flotation, but ...

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 邓久帅徐宏祥刘文礼文书明熊堃黄波黄根蔡教忠吴丹丹张茜刘俊伯
Owner CHINA UNIV OF MINING & TECH (BEIJING)