Vanadium titano-magnetite smelting blast furnace yield improving technology

Abstract

The invention discloses a vanadium titano-magnetite smelting blast furnace yield improving technology, and belongs to the technical field of vanadium titano-magnetite smelting. Through loading programmodification, a manner of rawore bottoming and rawore and waste steel material joint loading is adopted in development, a waste steel material is prevented from making contact with a weighing hopperand a loading main belt, the aim of protecting the weighing hopper and the main belt is achieved, the waste steel material is mounted on the rear segment to enter a blast furnace, the arranging position is close to the center of the blast furnace, the phenomenon that in the descending process of furnace burdens, waste steel directly makes contact with a furnace wall, and the furnace wall is damaged can be avoided, the blast furnace long service is facilitated, the vanadium titano-magnetite smelting comprehensive furnace entry grade can be improved, and the technology is a brand new technologyof vanadium titano-magnetite intensified smelting.

Description

technical field [0001] The present invention relates to a kind of vanadium-titanium magnetite smelting, particularly relate to a kind of vanadium-titanium magnetite smelting blast furnace production raising technology, belong to vanadium-titanium magnetite smelting technical field. Background technique [0002] 1. The status quo of intensified smelting of ordinary ore [0003] Most of the blast furnaces in China are smelted with ordinary ore. At present, the methods of increasing the smelting intensity of all enterprises are basically the same. The production of molten iron is increased by increasing the blast volume and enriching oxygen. Enterprises, the effect of increasing production is obvious. [0004] 2. Status quo of enhanced smelting of vanadium-titanium magnetite [0005] At present, the domestic vanadium-titanium magnetite smelting enterprises include Panzhihua Iron and Steel, Chenggang, Jianlong, Chuanwei, Desheng, and Dagang. To increase the output of molten i...

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Problems solved by technology

[0007] 1. There are big differences in the slagging system and heat system between the smelting of vanadium-titanium magnetite and the smelting of common ore. Adding scrap iron and steel smelting under the tank may affect the stability of the blast furnace.

[0008] 2. The comprehensive furnace grade of vanadium-titanium magnetite smelting is 2% to 5% lower than that of ordinary ore, and the blast furnace capacity cannot be further exploited only by increasing the blast volume and oxygen enrichment

[0009] 3. Only by increasing the blast volume and oxygen-enriched volume to increase the output, a large amount of gas flow washes the furnace wall, which is not conducive to the maintenance of the stave and directly affects the service life of the blast furnace

[0010] 4. When the blast volume and oxygen-enriched volume increase to a certain level, the maintenance of the blast furnace taphole will become more difficult, and the circulation of molten iron will cause more serious erosion of the hearth, which will affect the safe production of the blast furnace

[0011] 5. When the air blast volume and oxygen-enriched volume increase to a certain extent, the falling burden will be subject to increased resistance from the rising gas flow, which is not conducive to the long-term stability of the blast furnace.

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