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Charge and smelting method of high-grade vanadium titanomagnetite

A technology for vanadium-titanium magnetite and vanadium-titanium iron concentrate, which is applied in blast furnaces, blast furnace details, furnaces, etc., can solve problems such as difficulty in sintering and poor quality, and achieve the effects of easy ball formation, fine particle size and high grade.

Active Publication Date: 2022-07-29
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is to provide a high-grade vanadium-titanium magnetite furnace charge, which eliminates the sintering process and solves the problem of difficult sintering and poor quality

Method used

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  • Charge and smelting method of high-grade vanadium titanomagnetite
  • Charge and smelting method of high-grade vanadium titanomagnetite
  • Charge and smelting method of high-grade vanadium titanomagnetite

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Embodiment

[0032] Step 1: The vanadium-titanium concentrate powder, steel slag powder, quicklime and high-magnesium lime are batched to form vanadium-titanium pellets. 1.0-3.0%, quicklime powder: 2-10%, high-magnesium lime powder: 1-5%, the alkalinity of pellets is controlled at 1.0-2.0; the raw materials for preparing vanadium-titanium pellets are shown in Table 1, The quality of vanadium-titanium pellets is also specifically shown in Table 1;

[0033] Step 2: mix 90%-95% of the pellets of Scheme 2 and 5%-10% of ordinary lump ore into the blast furnace by mass percentage;

[0034] Step 3: Smelting in blast furnace, specific parameters: air temperature 1200~1250℃, oxygen enrichment rate of 2%~8%, molten iron [Ti] 0.1~0.3%, molten iron [Si] 0.1~0.3% slag (TiO 2 ) 20~24%, the basicity of blast furnace slag (CaO / SiO in blast furnace slag) 2 ) is controlled at 1.0 to 1.10;

[0035] To prepare high-grade vanadium-titanium magnetite according to the above method, the proportions of pellets ...

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Abstract

The invention provides a high-grade vanadium-titanium magnetite charge, which is prepared from vanadium-titanium pellets and ordinary lump ore, and the vanadium-titanium pellets are prepared from high-grade vanadium-titanium iron concentrate, steel slag powder and flux. . The present application also provides a method for smelting high-grade vanadium titanomagnetite. In the present application, high-grade vanadium-titanium concentrate is added with flux and steel slag powder to produce high-basicity vanadium-titanium pellets, bentonite is eliminated in pelletizing, sintered ore is eliminated in blast furnace smelting, and ordinary lump ore is added. The blast furnace enhanced smelting of vanadium titanomagnetite is realized at a high rate. The method solves the problems of difficult sintering of high-grade fine-grained iron ore concentrate and poor quality of sintered ore, and the use of this iron ore concentrate is more conducive to the production of pellets. Better utilization of iron ore concentrates.

Description

technical field [0001] The invention relates to the technical field of iron making, in particular to a high-grade vanadium-titanium ore charge and a smelting method. Background technique [0002] The main methods commonly used in vanadium-titanium magnetite smelting are sintering vanadium-titanium-iron concentrate and ordinary powder ore to produce sinter, vanadium-titanium-iron concentrate and bentonite pelletizing to produce oxidized pellets, and then sinter and pellets are produced. The ore and a small amount of lump ore are added to the blast furnace together with the coke in a certain proportion. The lower part is blasted to burn the coke to generate reducing gas. The rising of the reducing gas and the falling of the charge make the ore reduce, and then melt and drip into the hearth to complete the iron smelting. process to achieve the separation of slag and iron. In the above process, the high-grade iron concentrate has the problems of difficulty in sintering and poor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00C22B1/16
CPCC21B5/008C22B1/16
Inventor 付卫国蒋胜郑魁胡鹏
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP