A method for improving the quality of sintered ore of vanadium-titanium magnetite concentrate

A vanadium-titanium magnetite concentrate and sintering technology, which is applied in the field of iron and steel metallurgy, can solve the problems of increasing the high temperature holding time in the sintering process, decreasing the drum index of sintering ore, and reducing the vertical sintering speed, so as to reduce the vertical sintering speed and prolong the sintering process. Effect of time, quality improvement

Active Publication Date: 2021-01-15
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems existing in the prior art that after adding high-grade vanadium-titanium magnetite concentrate to the structure of the sintered material, the average particle size of the mixture is significantly increased, but the sintering time is shortened, and the drum index of the sintered ore is greatly reduced. Provide a method to improve the quality of vanadium-titanium magnetite concentrate sinter, the method can optimize the particle size composition of the sinter mixture, reduce the vertical sintering speed, prolong the sintering time, increase the high temperature holding time in the sintering process, and then improve the sintering drum Strength, quality of improved vanadium-titanium sinter

Method used

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  • A method for improving the quality of sintered ore of vanadium-titanium magnetite concentrate
  • A method for improving the quality of sintered ore of vanadium-titanium magnetite concentrate
  • A method for improving the quality of sintered ore of vanadium-titanium magnetite concentrate

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Embodiment 1

[0052] (1) dry mix sintered raw materials and return ore for 4min, and obtain dry material after mixing, and the consumption of described return ore is 30 parts by weight; (2) add water to the dry material obtained in step (1) and carry out a mixing successively for 4min and Secondary mixing for 4 minutes, controlling the moisture content of the obtained sintered mixture to be 7.2% by weight; (3) distributing the obtained sintered mixture in step (2), controlling the thickness of the material layer at 650 mm, igniting and sintering, wherein the ignition time 2min, the ignition negative pressure is 6kPa, and the sintering negative pressure is 12kPa, wherein, the sintering raw material contains 36% by weight of vanadium-titanium magnetite concentrate, 20% by weight of high-grade vanadium-titanium magnetite concentrate, and 14% by weight of Guogao Powder, 10% by weight of imported fine ore, 5% by weight of medium powder, 5.5% by weight of limestone, 5.3% by weight of active ash an...

Embodiment 2

[0056] (1) dry mix sintered raw materials and return ore for 5 minutes, and obtain dry material after mixing, and the consumption of described return ore is 15 parts by weight; (2) add water to the dry material obtained in step (1) and carry out a mixing successively for 4 minutes and Secondary mixing for 3.5min, controlling the moisture content of the obtained sintered mixture to be 7.0% by weight; (3) distributing the obtained sintered mixture in step (2), controlling the thickness of the material layer at 680mm, igniting and sintering, wherein the ignition The time is 2 minutes, the ignition negative pressure is 6.5kPa, and the sintering negative pressure is 13kPa, wherein, the sintering raw material contains 36% by weight of vanadium-titanium magnetite concentrate, 20% by weight of high-grade vanadium-titanium magnetite concentrate, 14% by weight of Guogao powder, 10% by weight of imported fine ore, 5% by weight of medium powder, 5.7% by weight of limestone, 5.1% by weight ...

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Abstract

The invention relates to the technical field of iron and steel metallurgy, and discloses a method for improving the quality of vanadium titanium magnetite concentrate sinter. The method comprises thefollowing steps: (1) drily mixing a sintering raw material and return mine, and thus obtaining a dry material; (2) adding water to the obtained dry material for primary mixing and secondary mixing, and controlling the water content of the obtained sintering mixture to be 7-7.2 wt%; and (3) distributing, igniting and sintering the obtained sintering mixture. High-grade vanadium titanium magnetite concentrate is added into vanadium titanium magnetite concentrate, and meanwhile the water content of the sintering mixture and the ratio of active ash in the sintering raw material are controlled to improve the tumbler strength of the sinter, so the quality of the vanadium titanium sinter is improved.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a method for improving the quality of sintered ore of vanadium-titanium magnetite concentrate. Background technique [0002] High-titanium vanadium-titanium magnetite concentrate, compared with ordinary concentrate, it contains higher TiO 2 , and compared with ordinary concentrates, the iron grade is much lower; after sintering, the grade of sintered ore is only about 50%, compared with ordinary sintered ore, there is a big gap. High-grade vanadium-titanium magnetite concentrate, compared with ordinary vanadium-titanium magnetite concentrate, has the characteristics of high grade, fine particle size, and good hydrophilicity. After adding high-grade vanadium-titanium magnetite concentrate to the sintering material structure, the average particle size of the mixture is significantly increased, but the sintering time is shortened, and the drum index of the sinteri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/16
CPCC22B1/16
Inventor 唐文博饶家庭胡鹏王禹键
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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