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Process for smelting vanadium-containing pig iron by high-silicon vanadium titanomagnetite concentrate powder

A vanadium-titanium magnetite, high-silicon technology, applied in the field of metallurgy

Inactive Publication Date: 2012-11-21
王洪东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary vanadium-titanium-magnetite concentrates are not used by ironmaking enterprises, and there are no enterprises that specifically use this iron ore concentrate

Method used

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  • Process for smelting vanadium-containing pig iron by high-silicon vanadium titanomagnetite concentrate powder
  • Process for smelting vanadium-containing pig iron by high-silicon vanadium titanomagnetite concentrate powder
  • Process for smelting vanadium-containing pig iron by high-silicon vanadium titanomagnetite concentrate powder

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Embodiment Construction

[0016] The present invention will be further explained below in conjunction with specific examples. The following examples do not limit the protection scope of the present invention, and all modifications and adjustments made based on the idea of ​​the present invention belong to the protection scope of the present invention.

[0017] In an embodiment, the chemical average composition of high-silicon vanadium titano-magnetite fine powder is listed in the following table:

[0018]

[0019] Mix this high-silicon vanadium-titanium-magnetite fine powder with coke (coal) powder and lime powder in a weight ratio of 1:0.05:0.20, add water to the mixer, and make pellets with a particle size of 25-35 by a briquetting machine After a period of natural health preservation, carbon-containing cold-set pellets with qualified strength are obtained.

[0020] At the same time, the high-silicon vanadium-titanium magnetite fine powder is used as raw material to produce roasted acid pellets by...

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Abstract

The invention provides a process for smelting vanadium-containing pig iron by high-silicon vanadium titanomagnetite concentrate powder, which comprises the following steps: preparing raw material particles with a particle size of 5-150 mm of carbon-containing cold-bonded pellets (blocks), sinter, roasted acidic pellets, and metallized pellets (blocks) from the concentrate powder, mixing the raw material particles with a solvent and a reducing agent, smelting in a smelting furnace to obtain vanadium-containing pig iron; according to the different components of the raw material particles, the solvent ratio during smelting is that raw material particle:limestone:dolomite:fluorite = 1:(0-0.25):(0-0.15):(0-0.10); the material blending principle is that the CaO:SiO2:TiO2 in the slag is controlled to be within a weight ratio range of 1:(0.5-1.2):(0.6-1.8); the invention solves the problem of difficult smelting of the vanadium titanomagnetite concentrate powder with high silicon, high titanium, and low iron; the smelting furnace relates to a blast furnace, an open hearth furnace, a submerged arc furnace and a hot blast cupola.

Description

Technical field: [0001] The invention relates to iron and steel smelting technology, which uses vanadium-titanium magnetite fine powder with high silicon content and low iron content to smelt vanadium-containing pig iron, and belongs to the field of metallurgy. Background technique [0002] my country is rich in vanadium-titanium magnetite resources, and relatively large vanadium-titanium magnetite deposits have been effectively developed and utilized. The vanadium-titanium magnetite concentrates in Chengde, Hebei and Panzhihua, Sichuan have high iron grade and low silicon content, generally TFe≥61%; SiO 2 ≤1.5%; at present, this ordinary vanadium-titanium magnetite fine powder has been reasonably comprehensively utilized. The technical process is to smelt vanadium-containing pig iron in a blast furnace, then extract vanadium from vanadium-containing molten iron, and then make steel after extracting vanadium. Already very mature. [0003] However, the ultra-low-grade raw o...

Claims

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Application Information

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IPC IPC(8): C21B5/00C21B11/00C22B1/24
Inventor 王洪东
Owner 王洪东
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