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High titan type high alkalinity sinter and method for preparing same

A technology of sintered ore and high titanium type, applied in the field of metallurgy, can solve the problems that the sintering requirements of Panzhihua vanadium-titanium magnetite concentrate cannot be met, the sintered ore cannot meet the smelting quality requirements, and the metallurgical properties of the vanadium-titanium sintered ore are poor, and the operation is simple and convenient. , the effect of increasing strength and improving metallurgical properties

Inactive Publication Date: 2010-03-31
PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the inventor found that according to the process conditions, if the sintered ore produced from the vanadium-titanium magnetite concentrate produced in the Panzhihua area cannot meet the smelting quality requirements, the key problem is that the sintering temperature involved in this patent is 1170-1300°C and the control of related process parameters cannot be achieved. Meet the sintering requirements of Panzhihua vanadium-titanium magnetite concentrate
[0004] At the same time, in the past, the basicity of vanadium-titanium magnetite concentrate produced in Panzhihua area was (CaO / SiO 2 )1.70, w(TiO 2 ) 7.5-11% (belonging to high titanium type) sintered ore, its strength (ISO drum index) is only about 65%, and the yield is only about 50%. Poor, low blast furnace smelting level

Method used

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  • High titan type high alkalinity sinter and method for preparing same
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preparation example Construction

[0013] The sinter preparation method of the present invention comprises the following steps: A, batching, B, mixing, C, distributing, D, igniting, sintering, E, thermal crushing, F, thermal screening, G, cooling, H, screening. After sieving, the blast furnace can be smelted. Specifically, the mixing in step B can be mixed twice; the sieving in step H can be sintered sieving and ditch sieving.

[0014] The raw material for sintering is mainly vanadium-titanium magnetite concentrate produced in Panzhihua, the ratio can be as high as 50%-80%, and a small amount of ordinary rich ore powder, flux, fuel, and externally mixed ore return are used for sintering, and the single concentrate can also be sintered. sintering. The composition content (by weight) of the vanadium-titanium magnetite concentrate contains: TFe 52-55%, FeO 29-32%, SiO 2 3-4%, CaO 1.5-2.0%, MgO2.0-2.5%, Al 2 o 3 3.0-4.5%, V 2 o 5 0.5-0.6%, TiO 2 13-15%, S 0.4-0.6%; and the particle size is coarse, the co...

Embodiment 1

[0043] Raw materials use the vanadium-titanium magnetite concentrate in Table 1, in terms of weight percentage: 54% of vanadium-titanium magnetite concentrate, 26% of ordinary fine ore (11% of Australian fine ore + 12% of domestic high-grade fine ore + domestic medium-grade fine ore 3%), limestone 5.5%, quicklime 7.0%, coke powder 4.6% (or anthracite 6.0%), ore return 40%.

[0044] The thickness of the material layer is 565mm, the machine speed is 1.55m / min, the ignition temperature is 1087°C, the sintering temperature is 1350°C, the exhaust gas temperature of the main pipe is 113°C, the sintering end point temperature is 280°C, and the sintering negative pressure is 12900Pa.

[0045] Increase the sinter basicity to 2.16, resulting in a technical effect of sintering machine utilization factor of 1.322t / m 2 ·h, the ISO drum index (>6.3mm%) is 69.95%, and the solid fuel consumption is 53.40kgce / t.

Embodiment 2

[0047] Raw materials use the vanadium-titanium magnetite concentrate in Table 1, in terms of weight percentage: 53% of vanadium-titanium magnetite concentrate, 27% of ordinary fine ore (12% of Australian fine ore + 12% of domestic high-grade fine ore + domestic medium-grade fine ore 3%), limestone 7.2%, quicklime 7.0%, coke powder 4.5% (or anthracite 6.0%), ore return 35%.

[0048] The thickness of the material layer is 567mm, the machine speed is 1.53m / min, the ignition temperature is 1083°C, the sintering temperature is 1350°C, the exhaust gas temperature of the main pipe is 112°C, the sintering end point temperature is 285°C, and the sintering negative pressure is 12830Pa.

[0049] Raise the sinter basicity to 2.45, resulting in a technical effect of sintering machine utilization factor of 1.404t / m 2 ·h, the ISO drum index (>6.3mm%) is 71.55%, and the solid fuel consumption is 48.72kgce / t.

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Abstract

The invention belongs to the field of metallurgy and mainly relates to a manufacture method for preparing a high titanium high pH value sintering ore by a v-ti magnetite concentrate ore. The technicalproblem needed to be solved is to provide a preparation method which takes the high titanium v-ti magnetite concentrate ore specially owned by Panzhihua as the material to prepare the high titanium high pH value sintering ore. The method is mainly characterized by taking the high titanium v-ti magnetite concentrate ore as the material with a sintering temperature of 1300 to 1400 DEG C. The technique of the invention applied to prepare the sintering ore is simply controlled; the high pH value sintering ore obtained by sintering is smelted; the technical economic indexes like the operating factors of a blast furnace, a coke ratio, a coal ratio, etc, and the like, are all improved. The method of the invention essentially improves the minimal components of a v-ti sintering ore, improves the intensity of the sintering ore and improves the metallurgy performance by improving the pH value of the v-ti sintering ore to 2.0 to 3.2, controlling a proper carbon addition amount and increasing theamount of a liquid phase.

Description

technical field [0001] The invention belongs to the field of metallurgy, and mainly relates to a method for preparing high-titanium high-alkalinity sintered ore from vanadium-titanium magnetite concentrate. Background technique [0002] Vanadium-titanium magnetite is one of the refractory ores in the world, sintered at home and abroad to avoid TiO 2 Ores are mainly ordinary ores, and some manufacturers only use a small amount of vanadium-titanium concentrate to protect the hearth of the blast furnace. [0003] Chinese patent application CN1042651C (application number 95106338.3), the vanadium-titanium type ultra-high alkalinity sintered ore manufacturing method discloses a vanadium-titanium magnetite concentrate, rich ore powder, limestone or dolomite, quicklime or slaked lime, coke powder or coal powder and The returned block is used as the raw material, and the vanadium-titanium ultra-high alkalinity sintered ore with an alkalinity of 2.0-3.2 is produced by adopting the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/16
Inventor 谢俊勇何木光蒋大均林文康陈明华何斌张义贤李玉洪吴耀辉
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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