Method for preparing blast furnace ironmaking burden from full-vanadium titanium magnetite concentrate

A technology of vanadium-titanium magnetite concentrate and vanadium-titanium magnetite, which is applied in the field of preparing high-quality blast furnace ironmaking charge, can solve the problems of high alkalinity sintering technology limitation, reduce the grade of total iron in sintered ore, etc., and achieve the promotion of oxidation and heat release , to avoid a large number of production, good development effect

Active Publication Date: 2014-07-30
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, a large amount of alkaline flux needs to be added during high-basic sintering, which reduces the total iron grade of sintered ore on the one hand, and more importantly, in order to balance the alkalinity of blast furnace smelting slag, a large amount of acidic furnace charge needs to be added. The reality of the serious shortage of acidic furnace materials restricts the promotion of high-basicity sintering technology

Method used

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  • Method for preparing blast furnace ironmaking burden from full-vanadium titanium magnetite concentrate

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Effect test

Embodiment 1

[0028]A single vanadium-titanium magnetite concentrate is used as the iron-containing raw material, the amount of coke powder is 3.9%, the basicity of the comprehensive material is 2.0, and 30% is returned to the ore. The whole vanadium-titanium magnetite concentrate is divided into two parts according to the mass percentage of 60%:40%, and 60% of the vanadium-titanium magnetite concentrate is agglomerated separately, and after being prepared into a spherical material with a particle size of 3mm to 7.5mm, it is rolled outside The mass percentage of the spherical material is 0.1% slaked lime to obtain a low-alkalinity spherical material with an alkalinity of 0.29 and a particle size of less than 8mm; the remaining 40% of the vanadium-titanium magnetite concentrate is mixed with all coke powder, flux and returned ore, and granulated. Prepare a high alkalinity mixture with an alkalinity of 3.9; then mix all the low alkalinity spherical materials and the ultrahigh alkalinity mixtur...

Embodiment 2

[0030] A single vanadium-titanium magnetite concentrate is used as the iron-containing raw material, the amount of coke powder is 3.9%, the basicity of the comprehensive material is 2.2, and the externally mixed ore is 30%. The whole vanadium-titanium magnetite concentrate is divided into two parts according to the mass percentage of 65%: 35%, and 65% of the vanadium-titanium magnetite concentrate is agglomerated separately, and after being prepared into a spherical material with a particle size of 4mm to 6.5mm, it is rolled outside The mass percentage of the spherical material is 0.18% slaked lime to obtain a low-alkalinity spherical material with an alkalinity of 0.3 and a particle size of less than 8mm; the remaining 35% vanadium-titanium magnetite concentrate is mixed with all coke powder, flux and returned ore, and granulated. Prepare a high alkalinity mixture with an alkalinity of 4.0; then mix all the low alkalinity spherical materials and the ultrahigh alkalinity mixtur...

Embodiment 3

[0032] A single vanadium-titanium magnetite concentrate is used as the iron-containing raw material, the amount of coke powder is 3.9%, the basicity of the comprehensive material is 1.8, and the externally mixed ore is 30%. The whole vanadium-titanium magnetite concentrate is divided into two parts according to the mass percentage of 60%:40%, and 60% of the vanadium-titanium magnetite concentrate is separately granulated into a spherical material with a particle size of 3mm to 5mm, and the spherical material is rolled outside The mass percentage is 0.5% slaked lime, obtains the low alkalinity mixed material that alkalinity is 0.38, particle size is less than 8mm; Mix remaining 40% vanadium-titanium magnetite concentrate with all coke powder, flux and returned ore, granulate, and prepare into The high alkalinity mixture with an alkalinity of 3.6; after mixing all the low alkalinity spherical materials and the ultrahigh alkalinity mixture evenly, the cloth is placed on a belt sin...

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Abstract

The invention discloses a method for preparing blast furnace ironmaking burden from full-vanadium titanium magnetite concentrate, which comprises the following steps of: dividing the full-vanadium titanium magnetite concentrate into two parts according to a proportion of (30-75%):(70-25%) by mass; preparing one part of the vanadium titanium magnetite concentrate into spherical material with the particle size of 3-7.5mm; externally rolling slaked lime accounting for 0.1-0.5% of the spherical material by mass to obtain low-alkalinity spherical material with the alkalinity of 0.29-0.38 and particle size of less than 8mm; dosing the other part of vanadium titanium magnetite concentrate with solid fuel, solvent and return mine, mixing and granulating to obtain a high-alkalinity mixture with alkalinity of 3.3-5.0; uniformly mixing the low-alkalinity spherical material with the high-alkalinity mixture, and applying the mixture to a belt type sintering machine; and igniting and sintering to obtain the finished product of sinter. The method disclosed by the invention can obviously reduce solid burnup and improve the quality index of the sintering product, and is easy to realize large-scale industrial production.

Description

technical field [0001] The invention relates to a method for preparing blast furnace ironmaking charge, in particular to a method for preparing high-quality blast furnace ironmaking charge by using all-vanadium titanium magnetite concentrate as raw material. Background technique [0002] Vanadium-titanium magnetite is a multi-element symbiotic iron ore mainly composed of iron, vanadium and titanium, accompanied by various valuable elements (such as chromium, cobalt, nickel, copper, scandium, gallium and platinum group elements, etc.). Due to the close symbiosis of iron and titanium, vanadium exists in titanomagnetite in the form of isomorphism, which is usually called vanadium titanomagnetite. The Panxi region of Sichuan Province in my country is rich in vanadium-titanium magnetite resources, with a total reserve of more than 10 billion tons. [0003] Vanadium-titanium magnetite concentrate is one of the two main products obtained from vanadium-titanium magnetite beneficiat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/16C22B1/24C21B5/00
Inventor 李光辉姜涛张元波余正伟郭宇峰范晓慧杨永斌许斌李骞陈许玲黄柱成朱忠平饶明军张树辉曾精华游志雄罗骏刘臣周友连梁斌珺
Owner CENT SOUTH UNIV
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