Vanadium-titanium ore blast furnace smelting method capable of increasing furnace condition recovery speed

The invention provides a schreyerite blast furnace smelting method capable of increasing the furnace condition recovery speed. The method comprises the steps of improving a charging system, improving a furnace condition recovery system, improving a material distribution system and improving a lower...

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Hauptverfasser: ZHENG KUI, RAO JIATING, XIE HONGEN, FU WEIGUO
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The invention provides a schreyerite blast furnace smelting method capable of increasing the furnace condition recovery speed. The method comprises the steps of improving a charging system, improving a furnace condition recovery system, improving a material distribution system and improving a lower air supply system. Furnace condition recovery and system improvement: when the furnace condition of the blast furnace is abnormal, the pellet proportion is reduced; replacing the variety of pellets, and using pellets which simultaneously meet the requirements that the TFe content is greater than or equal to 63%, the TiO2 content is less than or equal to 0.5% and the compressive strength is greater than or equal to 2500N/piece; when the natural lump ore is used, the natural lump ore with TFe not less than 63% and TiO2 not more than 0.5% is used, and the use proportion is 6-12%; by means of the method, the adjusting variable and the adjusting amplitude in the vanadium titano-magnetite blast furnace smelting furnace c