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A method of blast furnace ironmaking

A blast furnace ironmaking and blast furnace technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problems of low blast furnace smelting intensity and low blast furnace utilization rate, and achieve the effect of improving blast furnace utilization rate

Inactive Publication Date: 2014-10-01
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a new blast furnace ironmaking method in order to overcome the disadvantages of the existing blast furnace ironmaking method, such as the low utilization rate of the blast furnace and the low smelting intensity of the blast furnace

Method used

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  • A method of blast furnace ironmaking

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preparation example Construction

[0013] In the preparation process of sinter, based on the total weight of iron concentrate, rich ore powder, solid fuel and flux, the amount of iron concentrate can be 40-50% by weight, and the amount of rich ore powder can be 30-40% by weight , the total amount of solid fuel and flux can be 10-25% by weight. The weight ratio of the solid fuel and flux can be 1:2-3.

[0014] In the present invention, the iron ore concentrate is iron ore powder with high iron grade obtained by finely grinding and concentrating lean iron ore. According to different iron-containing minerals, iron concentrates are divided into magnetite concentrates, hematite concentrates and limonite concentrates; according to different beneficiation methods, they are divided into weak magnetic concentrates, strong magnetic concentrates, flotation concentrates and Gravity concentrate. The iron grade of iron concentrate is higher, generally above 54%. Since the blast furnace ironmaking method provided by the pr...

Embodiment 1-9

[0033] These examples are used to illustrate the method for blast furnace ironmaking provided by the present invention.

[0034] Combine sinter, pellets and fluorite (CaF 2 content of about 75% by weight) into the blast furnace for smelting, wherein, the amount of sinter, pellets and fluorite, the corresponding smelting parameters and the utilization coefficient of the blast furnace (indicating the utilization rate of the blast furnace) and smelting intensity are shown in Table 1 shown.

[0035] The utilization coefficient and smelting intensity of the blast furnace are calculated according to the following formulas:

[0036] The utilization factor of the blast furnace = the daily output of the blast furnace / the volume of the blast furnace

[0037] Smelting intensity = the amount of coke consumed by the blast furnace per day / the volume of the blast furnace

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Abstract

The invention discloses a blast furnace ironmaking method. The method includes adding ironmaking raw materials to a blast furnace for smelting; and the ironmaking raw materials contain sinter and pellet, which account for more than 98% of a total weight of the ironmaking raw materials. Melting conditions include: hot-blast temperature in the blast furnace at 1200-1300 DEG C, and oxygen enrichment rate of 4-10% by volume. The blast furnace iron-making method of the present invention can effectively improve the utilization ratio and smelting intensity of the blast furnace.

Description

technical field [0001] The invention relates to a method for blast furnace ironmaking. Background technique [0002] The main method of smelting vanadium-titanium magnetite is to sinter vanadium-titanium-iron concentrate and ordinary fine ore to produce sintered ore, and vanadium-titanium-iron concentrate to produce oxide pellets, and then sinter, pellets and a small amount of Lump ore is added into the blast furnace together with coke according to a certain proportion, and the lower part is blown to burn the coke to generate reducing gas. Separation of slag and iron. [0003] In the existing smelting process of high-titanium vanadium-titanium magnetite, its slag TiO 2 The content is as high as 22-25% by weight, and 5-10% by weight of ordinary iron ore needs to be added in the smelting process. Compared with sintered ore and pellet ore, ordinary iron ore has poor reducibility, which can increase the hearth Oxygen potential, which inhibits slag TiO 2 Over-reduction and im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00C22B1/14
Inventor 付卫国文永才饶家庭宋剑
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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