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Method for achieving ilmenite reduction with microwave technology

A technology of ilmenite and technology, which is applied in the field of mineral processing, can solve the problems of general ilmenite reduction effect, high energy consumption, and inability to obtain ilmenite concentrate, etc., achieve obvious magnetic separation effect, speed up production progress, and increase TiO2 The effect of recovery

Active Publication Date: 2019-02-15
HAINAN WENSHENG HIGH TECH MATERIALS +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the use of microwave heating to achieve ilmenite reduction still has the following problems: the high temperature of about 600°C needs to be maintained for a long time during the reduction process, and the energy consumption is still relatively large, and the ilmenite reduction effect is general, and higher quality titanium concentrate

Method used

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  • Method for achieving ilmenite reduction with microwave technology
  • Method for achieving ilmenite reduction with microwave technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for realizing the reduction of ilmenite with microwave technology, comprising the following steps:

[0027] Step (1): Mix the ilmenite to be reduced and pulverized coal at a mass ratio of 10:1.5, and at the same time add additive A, reduced iron powder and water to the material, and mix evenly; adding reduced iron powder and water The amount is 1% of the total mass of the material. The amount of additive A added is 0.2% of the total mass of the material;

[0028] Step (2): Put the uniformly mixed material into a tray with a thickness of 10-15 cm, heat it with microwave at 580°C for 50 minutes, add auxiliary agent B1 and auxiliary agent B2 during the heating period, and cool the material to room temperature after the reaction is completed; The sum of the added amount of agent B1 and auxiliary agent B2 is 0.2% of the total mass of the material (the ratio of the added amount of auxiliary agent B1 and auxiliary agent B2 is 1:2).

[0029] Step (3): Classify the co...

Embodiment 2

[0032] A method for realizing the reduction of ilmenite with microwave technology, comprising the following steps:

[0033] Step (1): Mix the ilmenite to be reduced with pulverized coal at a mass ratio of 10:2, and add additive A, reduced iron powder and water to the material at the same time, and mix evenly; adding reduced iron powder and water The amount is 2% of the total mass of the material; the addition of additive A is 0.5% of the total mass of the material.

[0034] Step (2): Put the uniformly mixed material into a tray with a thickness of 10-15 cm, heat it with microwave at 500°C for 70 minutes, add auxiliary agent B1 and auxiliary agent B2 during the heating period, and cool the material to room temperature after the reaction is completed; The sum of the addition amount of agent B1 and auxiliary agent B2 is 0.3% of the total mass of the material (the ratio of the addition amount of auxiliary agent B1 and auxiliary agent B2 is 1:1);

[0035] Step (3): Classify the co...

Embodiment 3

[0039] The difference between embodiment 3 and embodiment 2 is:

[0040] Step (2) is: put the uniformly mixed material into the tray with a thickness of 10-15cm, firstly heat it with microwave at 300°C for 25 minutes, add auxiliary agent B1, heat up to 420°C for 15 minutes, add auxiliary agent B2, and heat up to Heating at 580°C for 10 minutes, after the reaction is completed, the material is rapidly cooled to room temperature within 10 minutes;

[0041] The auxiliary agent B1 is a mixture of sodium hypochlorite and aluminum sulfate in a mass ratio of 1:3, and the auxiliary agent B2 is a mixture of sodium hypochlorite and aluminum sulfate in a mass ratio of 1:5.

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Abstract

The invention discloses a method for achieving ilmenite reduction with a microwave technology. According to the method, ilmenite to be reduced is evenly mixed with pulverized coal and auxiliaries formicrowave heating so that the ilmenite can be reduced rapidly, high-quality ilmenite concentrate with the TiO2 content reaching 72%-92% can be obtained only by conducting low-intensity magnetic fieldmagnetic separation once and medium-intensity magnetic field magnetic separation once after microwave heating is completed, and the TiO2 recovery rate can reach 97%. The method further has the effectsthat energy conservation and emission reduction are realized, the reaction rate is increased and the production schedule is accelerated; and power consumption can be reduced by 35%-40%. Meanwhile, exhaust gas emission is greatly reduced (90%), and an advanced industrial productivity signature technology is obtained.

Description

technical field [0001] The invention relates to a method for realizing reduction of ilmenite by microwave technology, which belongs to the technical field of mineral treatment. Background technique [0002] Ilmenite is the main raw material for the manufacture of titanium dioxide and titanium alloys, and it consumes 7-7.5 million tons a year, which is a huge amount. The ilmenite component is TiO 2 FeO, most of the ilmenite in the industry belong to seaside placer, seaside sand is affected by air and water flow for a long time, and it is easy to deteriorate. Most of the FeO that makes up ilmenite molecules has been oxidized into Fe 2 o 3 . [0003] In order to obtain high-quality ilmenite, it is necessary to reduce the oxidized ferric ilmenite that is difficult to dissolve into easily soluble divalent iron ilmenite. The traditional method is to mix the ilmenite with a reducing agent and heat it. The coal and natural gas used in the process will cause a large amount of exh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02B03C1/30
Inventor 钟金根董文阎镇
Owner HAINAN WENSHENG HIGH TECH MATERIALS