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A blast furnace smelting method for high-grade, high-vanadium, chromium-containing vanadium-titanium magnetite concentrate

A vanadium-titanium-magnetite concentrate and blast furnace smelting technology, applied in the metallurgical field, can solve the problems of reduced slag desulfurization capacity, increased slag viscosity, difficulty in separation of slag and iron, etc., to reduce residence time, improve slag basicity, and comprehensive coke ratio. reduced effect

Active Publication Date: 2019-02-26
NORTHEASTERN UNIV LIAONING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] TiO of high-grade high-vanadium chromium-containing vanadium-titanium magnetite concentrate 2 and Al 2 o 3 Higher content, blast furnace production will lead to TiO in blast furnace slag 2 and Al 2 o 3 The content of slag has increased, resulting in an increase in the viscosity of the slag, resulting in a series of problems such as a decrease in the desulfurization capacity of the slag and difficulties in the separation of slag and iron.

Method used

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  • A blast furnace smelting method for high-grade, high-vanadium, chromium-containing vanadium-titanium magnetite concentrate
  • A blast furnace smelting method for high-grade, high-vanadium, chromium-containing vanadium-titanium magnetite concentrate
  • A blast furnace smelting method for high-grade, high-vanadium, chromium-containing vanadium-titanium magnetite concentrate

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Experimental program
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Effect test

Embodiment 1

[0064] Mix high-grade, high-vanadium, high-vanadium, chromium-containing vanadium-titanium magnetite concentrate powder, iron concentrate powder, magnesite, lime, ore return and fuel evenly, and the weight percentage of high-grade, high-vanadium, high-vanadium, chromium-containing type vanadium-titanium ore powder in all materials is 20%, the weight percentage of iron concentrate powder is 20%, the weight percentage of magnesite is 5%, the weight percentage of lime is 10%, the weight percentage of fuel is 6%, and the rest is return ore; Sinter at 1230°C for 55 minutes to produce high-magnesium sintered ore;

[0065] Mix high-grade, high-vanadium, high-vanadium, chromium-containing vanadium-titanium magnetite concentrate powder, bentonite and fine iron concentrate powder and press them into pellets, and the weight percentage of high-grade, high-vanadium, chromium-containing type vanadium-titanium ore powder in the pellets is 90% , the weight percentage of bentonite is 1.5%, and...

Embodiment 2

[0074] Method is with embodiment 1, and difference is:

[0075] (1) Evenly mix high-grade, high-vanadium, high-vanadium, chromium-containing vanadium-titanium magnetite concentrate powder, iron concentrate powder, magnesite, lime, returned ore and fuel, and the high-grade, high-vanadium, chromium-containing type vanadium-titanium ore powder in all materials The percentage by weight is 50%, the percentage by weight of iron concentrate powder is 15%, the percentage by weight of magnesite is 1%, the percentage by weight of lime is 5%, the percentage by weight of fuel is 4%, and the rest is returned ore; after mixing All materials were sintered at 1280°C for 40 minutes to produce high-magnesium sintered ore;

[0076] (2) The percentage by weight of the high-grade high-grade vanadium-containing chromium-containing vanadium-titanium magnetite concentrate powder in the pellets is 60%, the percentage by weight of bentonite is 1%, and the rest is fine iron concentrate powder; the pelle...

Embodiment 3

[0083] Method is with embodiment 1, and difference is:

[0084] (1) Evenly mix high-grade, high-vanadium, high-vanadium, chromium-containing vanadium-titanium magnetite concentrate powder, iron concentrate powder, magnesite, lime, returned ore and fuel, and high-grade, high-vanadium, chromium-containing type vanadium-titanium ore powder in all materials The percentage by weight is 60%, the percentage by weight of iron concentrate powder is 19%, the percentage by weight of magnesite is 4%, the percentage by weight of lime is 6%, the percentage by weight of fuel is 5%, and the rest is return ore; after mixing All materials were sintered at 1250°C for 50 minutes to produce high-magnesium sintered ore;

[0085] (2) The percentage by weight of the high-grade high-grade vanadium-containing chromium-containing vanadium-titanium magnetite concentrate powder in the pellets is 70%, the percentage by weight of bentonite is 1.2%, and the rest is fine iron concentrate powder; the pellets a...

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Abstract

A blast furnace smelting method for high-grade, high-vanadium and chromium-containing vanadium-titanium magnetite concentrate, which is carried out according to the following steps: (1) mixing high-grade, high-vanadium and chromium-containing vanadium-titanium magnetite concentrate powder, iron concentrate powder, and magnesite , lime, returned ore and fuel are mixed to make high magnesium sinter; (2) high-grade high-vanadium chromium-containing vanadium-titanium magnet concentrate powder, bentonite and fuel are pressed into pellets; (3) high-magnesium sinter Mix the ore and pellets, add lump iron ore to make blast furnace charge; (4) Start blast furnace smelting, including charging system, air supply system, thermal system and slagging system; the air temperature is 1100~1200℃; the coke ratio is 330~380kg / t; coal ratio is 160~200kg / t; (5) The molten iron is tapped every 70~90 minutes; the temperature of the molten iron is 1430~1500℃. The method of the invention increases the proportion of high-vanadium chromium-containing vanadium-titanium magnetite concentrate in blast furnace smelting raw materials, reduces iron-making costs, improves the utilization coefficient of the blast furnace, greatly reduces the comprehensive coke ratio, and at the same time maintains a high metal yield rate.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and particularly relates to a blast furnace smelting method for high-grade, high-vanadium, chromium-containing vanadium-titanium magnetite concentrate. Background technique [0002] High-vanadium chromium-containing vanadium-titanium magnetite has large reserves of vanadium resources and is widely distributed all over the world, such as Russia's Kuranakh Mine, China's Panxi Hongge Mine and Chengde Ultra-lean Mine. The research on the non-blast furnace process of magnetite has achieved some research results, but the blast furnace process is still the most important process to realize the large-scale industrial utilization of vanadium-titanium magnetite resources now and in the future. In order to achieve a high level of large-scale development and utilization of high-vanadium chromium-containing vanadium-titanium magnetite resources, comprehensively recover valuable components such as iron, van...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/02C21B5/04C22B1/16C22B1/243
CPCC21B5/007C21B5/02C21B5/04C22B1/16C22B1/2406C22B1/243
Inventor 薛向新张勇姜涛张志祥杨松陶周密张显峰程功金姚本金周晟程
Owner NORTHEASTERN UNIV LIAONING