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Vanadium-titanium magnetite blast furnace smelting method capable of improving vanadium yield

A technology of vanadium-titanium magnetite and blast furnace smelting, which is applied in the field of steelmaking to achieve the effects of accelerating reduction, good promotion and application value, and increasing yield

Inactive Publication Date: 2011-10-19
PANZHIHUA IRON AND STEEL +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the recovery rate of vanadium in blast furnace vanadium-titanium magnetite smelting can only reach 68-70%. According to laboratory research, the vanadium content in iron and the recovery rate of vanadium have reached or approached the highest level of blast furnace production. Improving the recovery rate of vanadium has become a technical problem in this industry

Method used

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  • Vanadium-titanium magnetite blast furnace smelting method capable of improving vanadium yield
  • Vanadium-titanium magnetite blast furnace smelting method capable of improving vanadium yield
  • Vanadium-titanium magnetite blast furnace smelting method capable of improving vanadium yield

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Embodiment 1

[0024] Embodiment one uses the inventive method to smelt vanadium-titanium magnetite

[0025] Preparation of sintered ore: 35% of vanadium-titanium magnetite concentrate, 45% of ordinary iron ore, 5% of fuel (coke powder) and flux: 8.5% of limestone and 6.5% of quicklime according to the weight ratio. Adding water and mixing, the amount of water added is 7% of the total weight of the above raw materials, and then sintering with gas ignition, the sintering temperature is 1200-1350°C, and the sintering time is 45 minutes. Then the sintered ore is obtained by crushing and screening. Sinter basicity CaO / SiO 2 For: 2.4.

[0026] Preparation of vanadium-titanium pellets: adding 1.8% bentonite to the raw vanadium-titanium magnetite concentrate according to the weight ratio, mixing, moistening and grinding, forming pellets, drying and oxidizing roasting. The drying method is draft drying, the wind speed is 1-1.5 m / s, the initial drying temperature is 50-100°C, the preheating temper...

Embodiment 2

[0030] Embodiment two uses the inventive method to smelt vanadium-titanium magnetite

[0031] Preparation of sintered ore: 38% of vanadium-titanium magnetite concentrate, 42% of ordinary iron ore, 5% of fuel (coke powder) and flux: 7.5% of limestone and 7.5% of quicklime in proportion by weight. Adding water and mixing, the amount of water added is 7.2% of the total weight of the above raw materials, and then sintering with gas ignition, the sintering temperature is 1200-1350°C, and the sintering time is 45 minutes. Then crush and sieve to obtain sintered ore. Sinter basicity CaO / SiO 2 For: 2.45.

[0032] Preparation of vanadium-titanium pellets: adding 1.8% bentonite to the raw vanadium-titanium magnetite concentrate according to the weight ratio, mixing, moistening and grinding, forming pellets, drying and oxidizing roasting. The drying method is draft drying, the wind speed is 1-1.5 m / s, the initial drying temperature is 50-100°C, the preheating temperature is 400-800°C,...

Embodiment 3

[0036] Embodiment three uses the inventive method to smelt vanadium-titanium magnetite

[0037] Preparation of sintered ore: 40% of vanadium-titanium magnetite concentrate, 40% of ordinary iron ore, 5% of fuel (coke powder) and flux: 6.5% of limestone and 8.5% of quicklime according to the weight ratio. Adding water and mixing, the amount of water added is 7.5% of the total weight of the above raw materials, and then sintering with gas ignition, the sintering temperature is 1200-1350°C, and the sintering time is 45 minutes. Then crush and sieve to obtain sintered ore. Sinter basicity CaO / SiO 2 For: 2.50.

[0038] Preparation of vanadium-titanium pellets: adding 1.8% bentonite to the raw vanadium-titanium magnetite concentrate according to the weight ratio, mixing, moistening and grinding, forming pellets, drying and oxidizing roasting. The drying method is draft drying, the wind speed is 1-1.5 m / s, the initial drying temperature is 50-100°C, the preheating temperature is 40...

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Abstract

The invention discloses a vanadium-titanium magnetite blast furnace smelting method capable of improving vanadium yield, belonging to the field of metallurgy, and is mainly used for solving the problem of low vanadium yield during vanadium-titanium magnetite blast furnace smelting. The vanadium-titanium magnetite blast furnace smelting method capable of improving vanadium yield comprises the following steps of: mixing 10-20% of the total addition amount of coke with sinter and adding to a blast furnace together with vanadium-titanium pellets to form an ore layer, wherein the ore layer and coke layer are alternately arranged, the amount of coke in the coke layer is 80-90% of the total addition amount of the coke, the amount of the sinter accounts for 55-65% of the total weight of the ore, and the amount of the vanadium-titanium pellets accounts for 35-45% of the total weight of the ore. The vanadium-titanium magnetite blast furnace smelting method provided by the invention can effectively improve vanadium yield during vanadium-titanium magnetite smelting process, simultaneously accelerate the reduction of iron, improve the smelting intensity and production of the blast furnace, hasan important significance in improving vanadium-titanium ore smelting technology and has a good popularization and application value.

Description

technical field [0001] The invention belongs to the technical field of steelmaking, and in particular relates to a blast furnace smelting method of vanadium-titanium-magnetite for improving the vanadium yield. Background technique [0002] Blast furnace smelting vanadium-titanium magnetite has gone through about 40 years. With the development of my country's technology and economy, the technology of blast furnace smelting vanadium-titanium magnetite has also made great progress. The method for smelting vanadium-titanium-magnetite in the prior art is mainly to add sinter, pellets and lump ore to the blast furnace in a weight ratio of 60-70:25-35:3-7 for smelting, and coke in the blast furnace. Alternately arrange one layer of coke layer and one layer of ore layer. The lower part blasts the coke to get high temperature, and the temperature in the combustion zone can reach 2100-2200°C. During this process, the ore gradually completes the reduction process from top to bottom. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
Inventor 付卫国文永才饶家庭张海军
Owner PANZHIHUA IRON AND STEEL
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