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Furnace charge for vanadium-titanium magnetite blast furnace smelting, and blast furnace smelting method

A vanadium-titanium magnetite and blast furnace smelting technology, which is applied in blast furnace smelting, vanadium-titanium magnetite blast furnace smelting charge field, and can solve the problems of low smelting performance of blast furnace charge and high cost of blast furnace ironmaking

Inactive Publication Date: 2011-10-05
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of low blast furnace charge smelting performance and high cost of blast furnace ironmaking in the prior art, the object of the present invention is to provide a new blast furnace charge and a new blast furnace charge that can further improve the blast furnace charge smelting performance and reduce blast furnace ironmaking cost. blast furnace smelting method

Method used

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Examples

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preparation example Construction

[0011] 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 ( Lithochemical and / or limestone) mixed 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 car...

Embodiment 1

[0024] This embodiment is used to illustrate the method for blast furnace smelting using the vanadium-titanium magnetite blast furnace smelting charge of the present invention.

[0025] 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, 5 parts by weight of coke powder and 15 parts by weight of limestone are distributed on the magnetic roller distributor and added to the on the trolley, and then sintered at 1350°C for 30 minutes to obtain vanadium-titanium sintered ore. The sintering machine speed of the vanadium-titanium sintered ore is 1.71m / min, and the vertical sintering speed is 21.60mm / min. The drum strength of vanadium-titanium sintered ore (according to the ISO drum strength defined in GB13242, refers to taking 7.5 kg of 40-10mm sintered ore and rotating it in an ISO drum machine (SQZG--4 type; Hebi Metallurgical Machinery Equipment Co., Ltd.) for 200 After turn...

Embodiment 2

[0029] This embodiment is used to illustrate the method for blast furnace smelting using the vanadium-titanium magnetite blast furnace smelting charge of the present invention.

[0030] The sintered ore was prepared according to the method of Example 1, except that the amount of each substance was: 60 parts by weight of vanadium-titanium iron concentrate, 20 parts by weight of ordinary iron concentrate, 7 parts by weight of coke powder and 13 parts by weight of limestone.

[0031] 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 2700N / piece.

[0032] Blast furnace smelting: the charge of 65 parts by weight of vanadium-titanium sinter and 35 parts by weight of vanadium-titanium pellets is sent into the blast furnace for blast furnace smelting ...

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PUM

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Abstract

The invention provides a furnace charge for vanadium-titanium magnetite blast furnace smelting and a blast furnace smelting method. The furnace charge comprises a vanadium-titanium agglomerated ore and a vanadium-titanium pellet ore. The vanadium-titanium agglomerated ore is produced from a mixture of a vanadium-titanium iron concentrate and a common iron concentrate through sintering. The vanadium-titanium pellet ore is produced from a vanadium-titanium iron concentrate or a mixture of a vanadium-titanium iron concentrate and a common iron concentrate through roasting. The common iron concentrate is a vanadium-free and titanium-free iron concentrate. In the invention, the present furnace charge only comprises a vanadium-titanium agglomerated ore and a vanadium-titanium pellet ore and a common lump ore is not utilized in smelting processes, thus a clinker production rate is increased. Through the present furnace charge, a droplet interval and a maximum pressure difference of a stock column are reduced and it is shown that a cohesive zone of blast furnace smelting processes is low and a permeability of the stock column is improved. Therefore, blast furnace smelting is intensified and blast furnace charge smelting performances are improved.

Description

technical field [0001] The invention belongs to the technical field of ironmaking, and relates to a blast furnace smelting charge of vanadium-titanium magnetite and a blast furnace smelting method using the charge. Background technique [0002] In recent years, the main method of smelting vanadium-titanium magnetite in Panzhihua Iron and Steel's blast furnace is to sinter vanadium-titanium iron concentrate and ordinary fine ore to produce sintered ore, and to produce oxidized balls by pelletizing vanadium-titanium iron concentrate and ordinary iron concentrate Then add sinter, pellets and a small amount of lump ore into the blast furnace together with coke in a certain proportion, and the lower part blows the coke to generate reducing gas, the reducing gas rises and the furnace charge falls to reduce the ore, and then Melting and dripping into the furnace hearth to complete the ironmaking and smelting process and realize the separation of slag and iron. The smelting of high...

Claims

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Application Information

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IPC IPC(8): C21B5/00C22B1/14
Inventor 付卫国蒋胜文永才张海军
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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