High-wind-temperature rotational flow injection disturbance melting reduction and prereduction combination device and method

A combined device and air temperature technology, applied in the field of smelting reduction, can solve problems such as short service life, high investment cost of oxygen equipment, and large oxygen consumption

Active Publication Date: 2012-02-01
BEIJING SHOUGANG INT ENG TECH
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Problems solved by technology

Because the process uses oxygen ironmaking, the oxygen consumption is large, and the investment cost of oxygen equipment is high
[0011] (3) Hismelt process requires a high secondary combustion rate in the upper part of the final reduction furnace, and a high reduction potential for the slag and

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  • High-wind-temperature rotational flow injection disturbance melting reduction and prereduction combination device and method
  • High-wind-temperature rotational flow injection disturbance melting reduction and prereduction combination device and method
  • High-wind-temperature rotational flow injection disturbance melting reduction and prereduction combination device and method

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Embodiment Construction

[0072] The high wind temperature swirl jet disturbing smelting reduction and pre-reduction device (5 and 10) built according to the present invention must go through oven and furnace operation. The main function of the oven is to slowly remove the moisture in the furnace lining and improve the consolidation strength of the furnace lining. The oven should be carried out strictly according to the oven curve and the top temperature should not exceed 400°C. The furnace opening operation is carried out with reference to the ironmaking blast furnace with the same hearth diameter; at this time, the pre-reduction furnace 10 is loaded with charge to the upper part of the furnace waist, steam and nitrogen are passed, the diffuser valve is opened, and the system gas introduction operation is carried out with reference to the blast furnace ironmaking; when the hot blast stove When the air temperature at 12 reaches above 800°C and the furnace condition is gradually transferred to the smelt...

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Abstract

The invention discloses a high-wind-temperature rotational flow injection disturbance melting reduction and prereduction combination device and a method, which belong to the technical field of melting reduction. The device comprises a raw material system, a furnace top material charging and distributing system, a melting reduction furnace, a furnace top high-temperature gas system, a prereduction furnace, a semicoke gas recycling system, a coal dust preparing and spraying system, a molten iron desulfurizing agent preparing and jetting device, an oxygen and nitrogen supplying system, a residual iron treating system, a high-wind-temperature hot blast furnace, a melting reduction furnace blower, a furnace top gas dedusting and recycling system and a gas cogeneration device. The method comprises the following steps of: introducing high-temperature gas which is generated in a high-wind-temperature rotational flow injection disturbance melting reduction furnace into the prereduction furnace; directly reducing an iron-containing raw material in a solid phase state into a prereduction furnace material with a certain metallization rate; cooling, and then adding the cooled material and semicoke which serve as the furnace material and a fuel respectively into the melting reduction furnace; and finally producing molten iron by reduction. The device and the method have the advantages of high production efficiency and low energy consumption, are easy to operate and make industrialization easily realized.

Description

technical field [0001] The invention belongs to the technical field of smelting reduction, and in particular provides a combined device and method for high wind temperature swirl jet disturbance smelting reduction and pre-reduction. Background technique [0002] With the rapid development of my country's iron and steel industry, the demand for coking coal is also increasing. By the end of this century, my country's coking coal resources will be overwhelmed and unable to meet the requirements of steel production capacity. Blast furnace ironmaking that relies on coke production will not be able to achieve sustainable development. Therefore, the development and utilization of non-coking coal ironmaking process is an inevitable trend for the sustainable development of the iron and steel industry. [0003] Non-coking coal ironmaking technology refers to various process methods that do not use coke for metallurgical production process. According to product type and application, i...

Claims

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Application Information

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IPC IPC(8): C21B11/02C21B13/14
Inventor 唐振炎张福明钱世崇毛庆武姚轼李勇徐辉章启夫唐安萍许云李俊青李翠芝李欣曹朝真
Owner BEIJING SHOUGANG INT ENG TECH
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