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Pellet production method of vanadium-titanium magnetite concentrate

A technology of vanadium-titanium magnetite concentrate and production method, which is applied in the field of pellet production to achieve the effects of improving grade, increasing pelleting rate, and reducing the amount of addition

Inactive Publication Date: 2012-06-06
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pretreatment process of high-pressure roller mill for vanadium-titanium magnetite concentrate is blank at home and abroad.

Method used

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  • Pellet production method of vanadium-titanium magnetite concentrate
  • Pellet production method of vanadium-titanium magnetite concentrate
  • Pellet production method of vanadium-titanium magnetite concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Use the Φ420×100mm high-pressure roller mill produced by Luoyang CITIC Group to carry out high-pressure roller milling for roller milling of Baima concentrate. The parameters selected during roller milling are: roller speed 14r / min, roller pressure 13MPa, and abrasive moisture of 8% by weight After the roller mill finishes, it is measured that the particle size in the Baima concentrate powder is less than 200 mesh, and the particle content is 76.9% by weight, and the specific surface area of ​​the concentrate powder is 1668cm 2 / g, add water and 1.8% by weight of bentonite to the concentrate powder and mix well. A disc pelletizer with a diameter of 1800mm and a rotating speed of 15r / min was used to pelletize the vanadium-titanium magnetite concentrate powder after roller milling. Pre-add 400g of 3-5mm cue balls in the disc before pelletizing (reserved in advance), start the disc, start timing from the time of unloading, uniformly accelerate feeding and replenishing wate...

Embodiment 2

[0051]Using the pelletizing method described in Example 1, the difference is: the parameters selected during roller milling are roll speed 18r / min, roll pressure 11MPa, and 6.5% by weight of abrasive moisture; The particle size is less than 200 mesh particle content is 74.3% by weight, the specific surface area of ​​the concentrate powder is 1430cm 2 / g, add water and 1.8% by weight of bentonite to the concentrate powder and mix evenly, and the pelletizing rate is 85% during pelletizing.

Embodiment 3

[0053] Using the pelletizing method described in Example 1, the raw material is Baima concentrate, and the difference is: the parameters selected during the roller mill are roll speed 16r / min, roll pressure 12MPa, and 7.3% by weight of abrasive moisture; In the white horse concentrate powder, the particle size less than 200 mesh particle content is 75.2% by weight, and the specific surface area of ​​the concentrate powder is 1530cm 2 / g, add water and 1.8% by weight of bentonite to the obtained Baima concentrate powder and mix evenly, and the pelleting rate is 86% during pelletizing.

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Abstract

The invention relates to a pellet production method of a vanadium-titanium magnetite concentrate. The method comprises the following steps of: (1) conducting roll milling to a vanadium-titanium magnetite concentrate with a high pressure roller mill so as to obtain vanadium-titanium magnetite concentrate; (2) adding water and a binder into the vanadium-titanium magnetite concentrate powder to obtain a uniformly mixed material; (3) pelletizing the material with a pelletizer. Under the premise of guaranteeing that the green pellet drop strength, green pellet compression strength, green pellet cracking temperature, dry pellet compression strength, roasted pellet compression strength and other metallurgy performances can basically satisfy production needs simultaneously, the pellet concentrate produced by the method of the invention improves the pellet forming rate of a vanadium-titanium magnetite concentrate, reduces the adding amount of bentonite, and enhances the grade of iron sent into a furnace.

Description

technical field [0001] The invention relates to a pellet production method. Background technique [0002] Vanadium-titanium magnetite is a kind of complex refractory and refractory magnetite with coarse particle size, 53% iron grade, 12% titanium dioxide and 0.6% vanadium pentoxide. Spherical or weak spheroidal, my country's vanadium-titanium magnet beds are widely distributed and rich in reserves. The reserves and mining volume rank third in the country's iron ore. The proven reserves are 9.83 billion tons, and the prospective reserves are more than 30 billion tons. [0003] At present, there are two ways to improve the pelletizing rate of vanadium-titanium magnetite concentrate: (1) Improve the performance of the binder or change the binder type. The commonly used method is to add bentonite to the vanadium-titanium magnetite concentrate. (2) Perform secondary grinding on the vanadium-titanium magnetite concentrate to further refine the particles. At present, the commonly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/243C22B1/00
Inventor 杜炽向绍红张伟
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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