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Method for preparing sintered ore by using high-chromium-type vanadium-titanium mixture

A mixed material, high chromium type technology, applied in the field of metallurgy, can solve the problem of low material layer height, achieve the effect of no decrease in air permeability and high compressive strength

Active Publication Date: 2015-05-20
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem of low layer height of existing high-chromium vanadium-titanium mixture, the present invention provides a method for preparing sintered ore with high-chromium-type vanadium-titanium mixture. By adjusting the composition of high-chromium-type mixture, the mixing ball The performance of the material, and can be sintered with a high material layer to improve the production efficiency of the sintered ore

Method used

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  • Method for preparing sintered ore by using high-chromium-type vanadium-titanium mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepare high-chromium vanadium-titanium magnetite concentrate, iron ore powder and returned ore as raw materials, screen out the part with a particle size of <0.106mm as fine material, and the rest as coarse material; high-chromium vanadium-titanium magnetite concentrate accounts for 10% of the raw materials , the returned ore accounts for 30% of the total weight, and the rest is iron ore powder;

[0027] Take by weighing 20% ​​of the fine material as the small pellet raw material; mix the small pellet raw material with quicklime and coke powder evenly, wherein the consumption of quick lime is 0.5% of the total weight of the small pellet raw material, and the consumption of coke powder is pellet 0.5% of the total weight of the pellet raw materials; then use a disc pelletizer to prepare small pellets with a particle size of 5-8mm;

[0028] The rest of the fine material and all the coarse material are used as the mixture raw material; the mixture raw material is evenly mi...

Embodiment 2

[0032] Method is with embodiment 1, and difference is:

[0033] (1) Among the raw materials, high-chromium vanadium-titanium magnetite concentrate accounts for 30%, and the returned ore accounts for 20% of the total weight;

[0034] (2) Weigh 40% of the fine material as the pellet raw material; the consumption of quicklime is 1.0% of the total weight of the pellet raw material, and the consumption of coke powder is 1.0% of the total weight of the pellet raw material;

[0035] (3) The amount of quicklime in the mixture raw material is 2.5% of the total weight of the mixture raw material, the amount of limestone is 2.0% of the total weight of the mixture raw material, the amount of magnesite is 1.0% of the total weight of the mixture raw material, coke powder The dosage is 4.5% of the total weight of the raw materials of the mixture; then the mixture is made with a disc pelletizer, and the mixture with a particle size of +3mm accounts for more than 60% of the total weight;

[0...

Embodiment 3

[0039] Method is with embodiment 1, and difference is:

[0040] (1) Among the raw materials, the high-chromium vanadium-titanium magnetite concentrate accounts for 50%, and the returned ore accounts for 15% of the total weight;

[0041] (2) Weigh 60% of the fine material as the pellet raw material; the consumption of quicklime is 3.0% of the total weight of the pellet raw material, and the consumption of coke powder is 2.0% of the total weight of the pellet raw material;

[0042] (3) The amount of quicklime in the mixture raw material is 1% of the total weight of the mixture raw material, the amount of limestone is 4.0% of the total weight of the mixture raw material, the amount of magnesite is 3.0% of the total weight of the mixture raw material, coke powder The dosage is 3% of the total weight of the raw materials of the mixture; then the mixture is made by a disc pelletizer, and the particle size +3mm in the mixture accounts for more than 60% of the total weight;

[0043] ...

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Abstract

The invention discloses a method for preparing sintered ore by using a high-chromium-type vanadium-titanium mixture, belonging to the technical field of metallurgy. The method comprises the following steps: (1) preparing high-chromium-type vanadium-titanium magnetite concentrate, iron ore powder and return mine to serve as raw materials, screening one part with the granularity of less than 0.106mm to serve as fine aggregate, and taking the rest part as coarse aggregate; (2) weighing a part accounting for 20-80 percent of the fine aggregate to serve as a mini-pellet raw material, and mixing with quick lime and coke powder, thereby obtaining the mini-pellet material; (3) taking the rest fine aggregate and all the coarse aggregate as the mixed raw materials, and mixing with quick lime, limestone, magnesite ore and coke powder, thereby obtaining the mixed materials; (4) preparing the high-chromium-type vanadium-titanium mixed materials; (5) distributing in a sintering machine while controlling the distribution thickness at 600-800mm, igniting, exhausting air and sintering; and (6) crushing and screening, thereby obtaining the product. According to the method disclosed by the invention, one part of materials with the granularity of less than 0.106mm can be prepared into mini pellets, so that the product has high compressive strength, and when the height of the sintered mixture layer is increased, the breathability of the sintered mixture layer is not reduced.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to a method for preparing sintered ore by using high-chromium vanadium-titanium mixture. Background technique [0002] High chromium-type vanadium-titanium magnetite contains iron, vanadium, titanium, chromium and other elements and has extremely high comprehensive utilization value. Sintering-blast furnace is the main process for its large-scale industrial utilization, and sintering ore accounts for 70% of the blast furnace charge. 80%. However, due to the smooth surface and poor hydrophilicity of the high-chromium vanadium-titanium magnetite, its corners are smooth and "vertical", the structure is dense, and there are not too many fine particles and pores. It is difficult to granulate the mixture, and the traditional granulation is small. The poor compression resistance of the ball has resulted in the height of the current high-chromium vanadium-titanium mixture layer being ke...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B1/16C22B1/24
CPCC22B1/00C22B1/16C22B1/24
Inventor 薛向欣周密姜涛杨松陶段培宁
Owner NORTHEASTERN UNIV
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