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Method for improving performance of furnace slag obtained by smelting vanadic titanomagnetite in blast furnace

A vanadium-titanium magnetite and blast furnace smelting technology, which is applied in the field of improving the performance of high-titanium blast furnace slag in the blast furnace smelting of vanadium-titanium magnetite, and can solve problems such as increased viscosity of slag, poor performance of slag, and difficulties in blast furnace smelting. Achieve the effects of lowering the melting point, reducing the viscosity, and improving the performance of high-titanium slag

Inactive Publication Date: 2011-10-05
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +3
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The present invention is in order to solve in existing vanadium-titanium magnetite smelting process, due to TiO in slag 2 High content leads to poor performance of slag, especially the increase of viscosity of slag, which makes blast furnace smelting difficult. Provide a method that can improve the performance of high-titanium blast furnace slag in blast furnace smelting, such as slag viscosity

Method used

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  • Method for improving performance of furnace slag obtained by smelting vanadic titanomagnetite in blast furnace
  • Method for improving performance of furnace slag obtained by smelting vanadic titanomagnetite in blast furnace
  • Method for improving performance of furnace slag obtained by smelting vanadic titanomagnetite in blast furnace

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preparation example Construction

[0017] The preparation method of described vanadium-titanium sintered ore can be carried out according to the conventional preparation method in this field, for example, according to the proportion described in the present invention, vanadium-titanium iron concentrate and common iron concentrate and fuel (charcoal, coke powder) and flux ( quicklime and / or limestone) and sintered. Wherein, the dosage of vanadium-titanium iron concentrate and ordinary iron concentrate can be the conventional dosage of vanadium-titanium-iron concentrate in the preparation of sintered ore in this field. 50-55% of the total weight, and the amount of ordinary iron ore concentrate is 25-30% by weight of the total weight of raw materials used to form vanadium-titanium sintered ore. The commonly used sintering method is to carry out sintering on a belt sintering machine. For example, the mixed iron concentrate and flux are added to the trolley through the distributor, and the sintering is carried out b...

Embodiment 1

[0037] This embodiment is used to illustrate the method for blast furnace smelting of the present invention.

[0038] Preparation of vanadium-titanium sintered ore: 52 parts by weight of vanadium-titanium iron ore concentrate, 28 parts by weight of ordinary iron ore concentrate, 52 parts by weight of coke powder and 15 parts by weight of limestone are distributed on the magnetic roller distributor and added to the table Car, and then sintered at 1350°C for 30min to obtain vanadium-titanium sintered ore. The sintering machine speed of the obtained vanadium-titanium sintered ore is 1.71m / min, the vertical sintering speed is 21.60mm / min, and the drum strength (according to the ISO defined in GB13242 Drum strength refers to taking 7.5 kg of 40-10mm sinter and turning it in the ISO drum machine (SQZG--4 type; Hebi Metallurgical Machinery Equipment Co., Ltd.) for 200 revolutions. The percentage by weight is an important index to measure the strength of sintered ore, the higher it is...

Embodiment 2

[0045] This embodiment is used to illustrate the method for blast furnace smelting of the present invention.

[0046] The sintered ore was prepared according to the method of Example 1, except that the amount of each substance was: 45 parts by weight of vanadium-titanium iron concentrate, 35 parts by weight of ordinary iron concentrate, 6 parts by weight of coke powder and 14 parts by weight of limestone.

[0047] Vanadium-titanium pellets were prepared according to the method of Example 1, the difference being that the amount of vanadium-titanium iron concentrate was 90 parts by weight, and the amount of ordinary iron concentrate was 10 parts by weight. The compressive strength of the pellets is 2350N / piece.

[0048] Blast furnace smelting: vanadium-titanium magnetite and 5 parts by weight of lean manganese ore (MnO content is 3 % by weight, TFe content is 50% by weight) into the blast furnace for blast furnace smelting. TiO in the obtained slag was determined 2 The conten...

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Abstract

The invention provides a method for improving performance of furnace slag obtained by smelting vanadic titanomagnetite in a blast furnace. The method comprises the following steps: adding vanadic titanomagnetite in the blast furnace for smelting, obtaining molten iron and slag, wherein, when vanadic titanomagnetite is added in the blast furnace for smelting, poor manganese ore is added in vanadic titanomagnetite, the MnO content in the furnace slag is 0.8 to 1.2% by an addition of the poor manganese ore. According to the invention, a certain proportion of poor manganese ore is added into the smelting raw materials in the blast furnace, the characteristic that MnO containing in poor manganese ore is hard to reduce is used, oxygen potential of high-temperature region at bottom of the blast furnace is increased, generation of substance of Ti (CN) and the like with high-melting point in slag can be effectively controlled for improving the performance of high Titanium slag. Simultaneously, low MnO and TFe contained in the manganese ore can not be effectively used, so an effective utilization of the poor manganese ore is realized by the method.

Description

technical field [0001] The invention belongs to the technical field of ironmaking, and in particular relates to a method capable of improving the performance of high-titanium blast furnace slag in blast furnace smelting of vanadium-titanium magnetite. Background technique [0002] The main method of iron ore smelting is to sinter iron concentrate and fine ore to produce sinter, iron concentrate to pelletize to produce oxidized pellets, and then sinter, pellets and a small amount of raw ore in a certain proportion, It is added into the blast furnace together with coke, and the lower part is blasted to burn the coke to generate reducing gas. The reducing gas rises and the furnace charge falls to reduce the ore, and then melts and drops to the hearth to complete the ironmaking and smelting process, realizing the separation of slag and iron. However, the smelting of vanadium-titanium magnetite is due to the high content of TiO in the charge. 2 , during blast furnace smelting, T...

Claims

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Application Information

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IPC IPC(8): C21B5/04C22B1/16
Inventor 付卫国文永才饶家庭曾华峰
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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