Metallized vanadium-titanium pellet and preparation method thereof

A technology of pelletizing and metallization, which is applied in the field of iron and steel metallurgy, can solve problems such as poor fluidity, high iron loss, and high melting temperature of slag, and achieve the effects of reducing fuel consumption, reducing ironmaking costs, and strengthening blast furnace smelting

Pending Publication Date: 2022-06-17
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Problems solved by technology

The mineral structure of vanadium-titanium magnetite is iron-titanium symbiosis, with low iron content and high titanium content. It is difficult to smelt vanadium-titanium magnetite in blast furnace smelting, and the main performance is slag TiO 2 The content is as high as more than 20%, the melting temperature of slag is high, the fluidity is poor, the separation of slag and iron is difficult, and the iron loss is high

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  • Metallized vanadium-titanium pellet and preparation method thereof
  • Metallized vanadium-titanium pellet and preparation method thereof

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Embodiment Construction

[0015] The invention provides a method for preparing metallized vanadium-titanium pellets. In the method, the raw material structure is "vanadium-titanium iron concentrate+dust dust+steel slag micropowder". Among them, the vanadium ilmenite concentrate is a high-titanium type vanadium ilmenite concentrate in the Panxi area, and the composition of the vanadium ilmenite concentrate contains not less than 56% TFe and less than 4% SiO by weight. 2 , 0.5~1% CaO, 2~3% Al 2 O 3 , 0.5~0.8% of V 2 O 5 , 9~11% TiO 2 , less than 0.01% of P, less than 0.5% of S, and FeO content of 20 to 30%. Dust removal ash is the dust removal dust produced in the coke production process, including coal charging dust removal dust, coke dry quenching dust dust removal and coke sieving dust removal dust, etc. The composition of dust removal dust contains not less than 75% C by weight percentage, and does not contain iron. Steel slag micropowder is the powder of vanadium-containing steel slag produced...

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Abstract

The invention discloses metallized vanadium-titanium pellets and a preparation method thereof, relates to the field of ferrous metallurgy, and aims to reduce fuel consumption of blast furnace smelting, reduce ironmaking cost and improve yield. According to the technical scheme, the metallized vanadium-titanium pellet preparation method comprises the steps that vanadium-titanium-iron concentrate, fly ash and steel slag micro powder are fully and evenly mixed according to the weight ratio of (85-90): (5-10): (3-5) to obtain a mixture, then water is added into the mixture to prepare green pellets, drying, preheating and roasting are conducted, and finally the metallized vanadium-titanium pellets are obtained. The fly ash is high in C content and proportion, in the roasting process, a part of C is combusted, a part of C in a pellet center area participates in the reduction reaction of iron oxide, a part of metal iron is generated, and therefore metallized vanadium-titanium pellets are obtained. The metallized vanadium-titanium pellets are added into the blast furnace for smelting, so that secondary resources are utilized, fuel consumption of blast furnace smelting is reduced, blast furnace smelting is enhanced, and the yield is increased.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, in particular to a blast furnace smelting charge and a preparation method thereof. Background technique [0002] Blast furnace smelting vanadium titanomagnetite, in order to strengthen blast furnace smelting, the charge usually used is sinter and pellet, among which sinter is high basicity sinter and pellet is acid oxide pellet. The mineral structure of vanadium-titanium magnetite is iron-titanium symbiosis, with low iron content and high titanium content. 2 The content is as high as 20% or more, the melting temperature of slag is high, the fluidity is poor, the separation of slag and iron is difficult, and the iron loss is high. In order to improve the smelting index of blast furnace, blast furnace smelting is usually strengthened by increasing the proportion of pellets, and the pellets are mainly vanadium-titanium oxide pellets. SUMMARY OF THE INVENTION [0003] The invention provid...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02
CPCC22B1/02
Inventor 付卫国胡鹏郑魁
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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