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Preparation method of high-ferrum low-silicon vanadium-titanium sintering ore

A vanadium-titanium sinter and high-speed iron technology, applied in the field of iron and steel metallurgy, can solve the problems of sinter strength and yield reduction, low-temperature reduction pulverization performance deterioration, less silicate binder phase content, etc., to extend the ignition temperature and time, increase the output of sinter ore, and increase the effect of material layer thickness

Inactive Publication Date: 2014-05-07
PANZHIHUA IRON AND STEEL +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the white horse vanadium-titanium magnetite concentrate SiO 2 The content is 2.8-3.0% by weight, which is about 0.5 percentage points lower than that of Panzhihua vanadium-titanium magnetite concentrate, and the content of silicate binder phase produced in the sintering process is less. The existing Panzhihua high-titanium vanadium-titanium magnetite concentrate is used When the sintering method is used for sintering, the strength and yield of sintered ore will decrease, the performance of low-temperature reduction pulverization will deteriorate, and the output will decrease.

Method used

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Examples

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preparation example Construction

[0008] According to the preparation method of high-iron and low-silicon type vanadium-titanium sintered ore of the present invention, the method comprises: one kind of sintering raw material is pelletized, followed by cloth distribution, pressing and sintering, the sintering raw material contains iron concentrate, fuel and flux, Wherein, the sintering raw material also contains boron-containing substances, the particle size of the fuel is not more than 3mm, and the fuel with a particle size <0.5mm accounts for 25-40% by weight of the fuel, and the content of the flux makes the sintering of the sintering raw material The alkalinity is 2-2.5, the material layer thickness of the cloth is 660-750mm, the ignition temperature of the sintering is 1100-1150°C, and the ignition time of the sintering is 2-2.5min

[0009] According to the preparation method of the high-iron-low-silicon type vanadium-titanium sintered ore of the present invention, by treating the fuel, the particle size is...

Embodiment 1

[0026] This example is used to illustrate the preparation method of the high-iron-low-silicon type vanadium-titanium sintered ore of the present invention.

[0027] The coke powder is crushed and classified by a four-roller crusher, and processed into a particle size of 0-3mm, wherein 2 Content is 2.8% by weight, V 2 o 5 : 0.724 wt%, TiO 2 : 10.72% by weight) and ordinary iron ore powder (TFe: 61.63% by weight, FeO: 2.41% by weight, SiO 2content is 3.80% by weight) as the iron-containing material in the sintered ore raw material, 4.6 parts by weight of processed coke powder is added as fuel with respect to 100 parts by weight of the iron-containing material, and then limestone is added as a flux to adjust the sintered ore raw material The sintering basicity is 2.15, and then 0.03 parts by weight of boric acid is added relative to 100 parts by weight of iron-containing material, and mixed evenly. Add the mixed sinter raw materials to the trolley through the magnetic roller d...

Embodiment 2

[0041] This example is used to illustrate the preparation method of the high-iron-low-silicon type vanadium-titanium sintered ore of the present invention.

[0042] The coke powder is crushed and classified by a four-roller crusher, and processed into coke powder with a particle size of 0-3mm, and 2 Content is 2.8% by weight, V 2 o 5 : 0.724 wt%, TiO 2 : 10.72% by weight) and ordinary iron ore powder (TFe: 61.63% by weight, FeO: 2.41% by weight, SiO 2 content is 3.80% by weight) as the iron-containing material in the sintered ore raw material, 4.6 parts by weight of processed coke powder is added as fuel with respect to 100 parts by weight of the iron-containing material, and then limestone is added as a flux to adjust the sintered ore raw material The sintering basicity is 2.25, and then 0.06 parts by weight of boric acid is added relative to 100 parts by weight of the iron-containing material, and mixed evenly. Add the mixed sintered ore raw materials to the trolley throu...

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Abstract

The invention discloses a preparation method of a high-ferrum low-silicon vanadium-titanium sintering ore, comprising the following steps of: granulating a sintered raw material, then sequentially carrying out material distribution and compression and sintering on the sintered raw material, wherein the sintered raw material contains iron ore concentrates, fuel, solvents and boron-containing substances, the granularity of the fuel is less than or equal to 3 mm, the fuel with the granularity less than 0.5 mm is 25-40 percent by weight accounting for the fuel, the sintering alkalinity of the sintered raw material is 2-2.5 according to the content of the solvents, the thickness of a material layer is 660-750 mm according to the material distribution, the ignition temperature of sintering is 1100-1150 DEG C, and the ignition time of the sintering is 2-2.5 minutes. The preparation method can enhance the strength and the finished product rate of the high-ferrum low-silicon vanadium-titanium sintering ore, improve the low-temperature reduction degradation performance and increase the output of the high-ferrum low-silicon vanadium-titanium sintering ore.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to a preparation method of high-iron and low-silicon type vanadium-titanium sintered ore. Background technique [0002] At present, Panzhihua Iron and Steel mainly uses Panzhihua high-titanium vanadium-titanium magnetite concentrate to prepare high-titanium vanadium-titanium sinter (sintered ore TiO 2 content as high as about 7.5%), high-titanium vanadium-titanium magnetite concentrate has the characteristics of high vanadium and low silicon, usually SiO 2 The content is 3.3-3.5% by weight. The sintering method used is usually to use limestone as a flux and coke powder as a fuel to be crushed by a crusher, then mix the crushed flux and fuel with vanadium-titanium magnetite concentrate in a cylinder mixer according to the conventional amount of water, and then load Put it into the sintering trolley and ignite it with an igniter for draft sintering. Us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/16
Inventor 甘勤何木光蒋大军何群张义贤文永才康斌
Owner PANZHIHUA IRON AND STEEL
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