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A method of microwave pretreatment to improve ilmenite flotation efficiency

A microwave treatment and pretreatment technology, applied in flotation, solid separation, etc., can solve the problems of small difference in buoyancy between ilmenite and gangue components, large amount of beneficiation agents, and increased beneficiation costs, etc., to achieve increased flotation Sex difference, lower flotation cost, high grade effect

Active Publication Date: 2019-08-09
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many problems in the existing ilmenite flotation process. The difference in buoyancy between ilmenite and gangue components in the ore is small, which makes the beneficiation process complicated and increases the beneficiation cost. environmental pollution

Method used

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  • A method of microwave pretreatment to improve ilmenite flotation efficiency

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Grinding: first grind the desulfurized flotation raw ore until the particle size of -0.074mm accounts for 55%, and then dry it naturally in the air for 20 hours.

[0019] (2) Segmented microwave pretreatment: place the finely ground ilmenite in the microwave equipment, and the thickness of the material is 1 cm. Microwave pretreatment includes two stages; the first stage of microwave pretreatment conditions: intermittent microwave treatment, microwave density 2kW / kg, processing time 3min, maintaining the temperature of the microwave oven cavity at 150°C; second stage microwave pretreatment conditions: continuous Microwave treatment, microwave density 15kW / kg, treatment time 2min. After the heating is over, the ore is quickly taken out and naturally cooled to room temperature in the air.

[0020] (3) Flotation: Flotation is carried out on the ilmenite after microwave treatment. The flotation process includes a roughing and a beneficiation, the pH of the pulp is 5, an...

Embodiment 2

[0022] (1) Grinding: first grind the desulfurized flotation raw ore until the particle size of -0.074mm accounts for 65%, and then dry it naturally in the air for 30 hours.

[0023] (2) Segmented microwave pretreatment: place the finely ground ilmenite in the microwave equipment, and the thickness of the material is 2.5 cm. Microwave pretreatment includes two stages; the first stage of microwave pretreatment conditions: intermittent microwave treatment, microwave density 3kW / kg, processing time 4min, maintaining the temperature of the microwave oven cavity at 120°C; second stage microwave pretreatment conditions: continuous Microwave treatment, microwave density 20kW / kg, treatment time 2.5min. After the heating is over, the ore is quickly taken out and naturally cooled to room temperature in the air.

[0024] (3) Flotation: Flotation is carried out on the ilmenite after microwave treatment. The flotation process includes a roughing and a beneficiation. The pH of the pulp is 6...

Embodiment 3

[0026] (1) Grinding: Grind the desulfurized flotation raw ore until the particle size of -0.074mm accounts for 60%, and then dry it naturally in the air for 24 hours.

[0027] (2) Segmented microwave pretreatment: place the finely ground ilmenite in the microwave equipment, and the thickness of the material is 2cm. Microwave pretreatment includes two stages; the first microwave pretreatment conditions: use intermittent microwave treatment, microwave density 1.5kW / kg, processing time 3.5min, maintain the microwave oven cavity temperature at 180 ℃; the second microwave pretreatment conditions: Continuous microwave treatment is adopted, the microwave density is 25kW / kg, and the treatment time is 1.5min. After the heating is over, the ore is quickly taken out and naturally cooled to room temperature in the air.

[0028] (3) Flotation: Carry out flotation on ilmenite after microwave treatment. The flotation process includes a roughing and a beneficiation, the pH of the pulp is 5.5...

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Abstract

The invention relates to the field of mineral processing, and discloses a method for improving the flotation efficiency of ilmenite through microwave treatment. The method comprises the following steps that flotation raw ore is firstly levigated, and then the ore is subjected to subsection microwave pretreatment; and the ore is conveyed into flotation equipment for flotation after being cooled toroom temperature. Due to microwave pretreatment, ferrous ions on the surface of ilmenite can be oxidized into ferric ions, the adsorption function of a collecting agent on the ferric ions is promoted,and the floatability of floatability is improved. Therefore, the recycling rate of ilmenite is increased, the consumption of sulfuric acid and beneficiation reagents in the flotation process is reduced, and the method is beneficial to environmental friendliness.

Description

technical field [0001] The invention belongs to the field of mineral processing, and in particular relates to a method for improving ilmenite flotation efficiency by microwave pretreatment. Background technique [0002] Titanium and its alloys play an increasingly important role in many fields with good physical and chemical properties. The main source of titanium metal in my country is ilmenite. Therefore, ilmenite has high industrial value, and the beneficiation of ilmenite has attracted more and more attention. In the existing ilmenite beneficiation process, magnetic separation or gravity separation is usually used for enrichment first, and then flotation or electric separation is used for concentration to obtain titanium concentrate, among which flotation is the most widely used. However, there are many problems in the existing ilmenite flotation process. The difference in buoyancy between ilmenite and gangue components in the ore is small, which leads to complex benefi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03D1/002C22B1/00B03D101/02B03D103/04
CPCB03D1/00B03D1/002B03D2201/007B03D2201/02B03D2203/04C22B1/00
Inventor 姜涛王俊鹏刘亚静薛向欣段培宁
Owner NORTHEASTERN UNIV LIAONING
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