Blast furnace smelting method of high-grade high-vanadium chromium-contained type vanadium-titanium iron ore concentrates

A vanadium-titanium magnetite concentrate and blast furnace smelting technology, which is applied in the field of metallurgy, can solve problems such as increased viscosity of slag, reduced desulfurization capacity of slag, difficulty in separating slag and iron, and achieves the effect of reducing the cost of ironmaking

Active Publication Date: 2017-11-03
NORTHEASTERN UNIV
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  • Abstract
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  • 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 conte...

Method used

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  • Blast furnace smelting method of high-grade high-vanadium chromium-contained type vanadium-titanium iron ore concentrates
  • Blast furnace smelting method of high-grade high-vanadium chromium-contained type vanadium-titanium iron ore concentrates
  • Blast furnace smelting method of high-grade high-vanadium chromium-contained type vanadium-titanium iron ore concentrates

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Experimental program
Comparison scheme
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 high-grade, high-vanadium, chromium-containing type vanadium-titanium ore powder in all materials The weight percentage is 50%, the weight percentage of iron concentrate powder is 15%, the weight percentage of magnesite is 1%, the weight percentage of lime is 5%, the weight percentage of fuel is 4%, and the rest is return ore; 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-vanadium high-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 pellets are sintered at 1130°C ...

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 of high-grade high-vanadium chromium-contained type vanadium-titanium iron ore concentrates comprises the following steps that (1) high-grade high-vanadium chromium-contained type vanadium-titanium iron ore concentrate fines, iron ore concentrate powder, magnesite, lime, return mines and fuel are mixed, and high-magnesium sintered ore is made; (2) high-grade high-vanadium chromium-contained type vanadium-titanium iron ore concentrate fines, bentonite and fuel are compacted to be pellets; (3) the high-magnesium sintered ore and the pellets are mixed, lump iron is added, and blast furnace burden materials are made; (4) blast furnace smelting is started, and blast furnace smelting comprises a charging system, an air blowing system, a thermal system and a slag forming system; the wind-warm syndrome is 1100-1200 DEG C, the coke ratio is 330-380 kg/t, and the coal ratio is 160-200 kg/t; and (5) tapping is conducted on molten iron every 70-90 min, and the temperature of the molten iron is 1430-1500 DEG C. According to the blast furnace smelting method of the high-grade high-vanadium chromium-contained type vanadium-titanium iron ore concentrates, the proportion of the high-vanadium chromium-contained type vanadium-titanium iron ore concentrates in blast furnace smelting raw materials is improved, and the ironmaking cost is reduced; and the blast furnace utilization factor is improved, the comprehensive coke ratio is greatly reduced, and meanwhile the metal yield is kept at a high level.

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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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
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