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Method for smelting vanadium-titanium magnetite by blast furnace

A vanadium-titanium magnetite and blast furnace smelting technology, which is applied in the field of iron and steel metallurgy, can solve problems such as rising costs, lower sinter quality, and poor blast furnace production indicators, and achieve the effect of increasing the ratio and reducing the cost of ironmaking

Inactive Publication Date: 2010-02-03
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if more vanadium-titanium magnetite is added to the sinter, the quality of the sinter will decrease accordingly, and the TiO in the final slag of blast furnace smelting will 2 The content rises greatly, which leads to the deterioration of the production index of the blast furnace
Adding Mn ore or fluorite in the furnace to deal with the problem of slag viscosity can properly alleviate the aforementioned problems, but the cost will increase

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation of sintered ore: the vanadium-titanium magnetite (composition is the same as comparative example) of 47 weight parts, the non-vanadium titanomagnetite (composition is the same comparative example) of 36 weight parts, the unslaked lime (composition is the same comparative example) of 13 weight parts and 4 parts by weight of coke powder (composition is the same as that of the comparative example) were mixed and sintered, and other conditions were the same as those of the comparative example, and the tumble strength of the obtained sintered ore was 72.61%.

[0029] Preparation of all-vanadium-titanium pellets: put 100 wt. of vanadium-titanium magnetite (composition is the same as the comparative example) and 2 wt. , using a disc pelletizer to make pellets, the pellets are air-dried on a chain grate machine, the wind speed is 1.5m / s, the initial drying temperature is 50°C, the preheating temperature is 400-1000°C, and they are roasted in a rotary kiln. All-v...

Embodiment 2

[0032] The preparation of sintered ore: the vanadium-titanium magnetite (composition is the same as comparative example) of 49 weight parts, the non-vanadium-titanium magnetite (composition is the same comparative example) of 34 weight parts, the unslaked lime (composition is the same comparative example) of 13 weight parts and 4 parts by weight of coke powder (composition is the same as that of the comparative example) were mixed and sintered, and the other conditions were the same as those of the comparative example, and the tumble strength of the obtained sintered ore was 72.57%.

[0033] The preparation method of the mixed pellets is the same as that of the comparative example.

[0034] The preparation method of all-vanadium-titanium pellets is the same as in Example 1.

[0035] 65 parts by weight of sintered ore, 10 parts by weight of mixed pellets, 20 parts by weight of all-vanadium-titanium pellets and 5 parts by weight of lump ore (composition is the same as the compar...

Embodiment 3

[0037] The preparation of sintered ore: the vanadium-titanium magnetite of 52 weight parts, the non-vanadium-titanium magnetite of 31 weight parts, the unslaked lime of 13 weight parts (composition is the same as comparative example) and the coke powder of 4 weight parts (composition is the same as comparative example) Mixed sintering, other conditions are the same as the comparative example, the obtained sintered ore drum strength is 72.54%.

[0038] The preparation method of the mixed pellets is the same as that of the comparative example.

[0039] The preparation method of all-vanadium-titanium pellets is the same as in Example 1.

[0040] The above-mentioned 65 parts by weight of sintered ore, 20 parts by weight of mixed pellets, 10 parts by weight of all-vanadium-titanium pellets and 5 parts by weight of lump ore (composition is the same as the comparative example) are mixed into the blast furnace for smelting, and the final slag composition of the blast furnace smelting ...

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Abstract

The invention belongs to the technical field of ferrous metallurgy, in particular to a method for smelting a vanadium-titanium magnetite by a blast furnace, which aims to provide a method for smeltinga vanadium-titanium magnetite by a blast furnace with lower cost. The method comprises the following step: adding the following raw materials into a blast furnace for smelting in percentage by weight: agglomerate being more than or equal to 60 percent and less than or equal to 70 percent, mixing pellet being more than or equal to 0 percent and less than or equal to 30 percent, full vanadium-titanium pellet being more than 0 percent and less than or equal to 30 percent and lump ore being more than or equal to 3 percent and more than or equal to 7 percent, wherein the percentage composition ofthe full vanadium-titanium pellet is not 0, and the summation of the mixing pellet and the full vanadium-titanium pellet is 30 percent. TiO2 which is a final slag component of the blast furnace smelting method is 21-23 percent by weight, and the final slag component has no influence on the stable operation of the blast furnace within a proper range of the normal smelting of the blast furnace at present. The method reduces the content of the TiO2 in the agglomerate, increases the content of the TiO2 in the pellets, improves the proportion of schreyerite in the smelting raw materials in the blast furnace and lowers the smelting cost.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, in particular to a method for smelting vanadium-titanium magnetite in a blast furnace. Background technique [0002] Blast furnace smelting vanadium-titanium magnetite has gone through nearly 40 years, and has made great progress, and the production technical and economic indicators have continued to hit new highs. The method for smelting vanadium-titanium magnetite in the prior art is mainly to mix sinter, mixed pellets and lump ore in a weight ratio of 60-70:25-35:3-7, and then smelt them in a blast furnace. The sintered ore is made by sintering vanadium titanomagnetite, non-vanadium titanomagnetite, flux and fuel as raw materials. The mixed pellets are made of vanadium-titanium magnetite, non-vanadium-titanium magnetite and bentonite by pelletizing and roasting. The proportion of vanadium-titanium magnetite into the furnace is about 61%, of which, the amount of vanadium-tit...

Claims

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Application Information

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IPC IPC(8): C21B5/00
Inventor 蒋胜何群
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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