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 mixtu

Method used

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

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0025] Example 1

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

[0027] Weigh 20% of the fines as raw material for small pellets; mix the raw materials of small pellets with quicklime and coke powder evenly. The amount of quicklime is 0.5% of the total weight of the raw materials for small pellets, and the amount of coke powder is small pellets. 0.5% of the total weight of the raw materials; then use a disc pelletizer to prepare small pellets with a particle size of 5-8mm;

[0028] Use the remaining fine materials and all coarse materials as the raw materials of the mixture; mix the raw materials of the mixtu...

Example Embodiment

[0031] Example 2

[0032] The method is the same as in Example 1, the difference is:

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

[0034] (2) Weigh 40% of the fine material as the raw material for small pellets; the amount of quicklime is 1.0% of the total weight of the raw materials for the small pellets, and the amount of coke powder is 1.0% of the total weight of the raw materials for the small pellets;

[0035] (3) The amount of quicklime in the raw materials of the mixture is 2.5% of the total weight of the raw materials, the amount of limestone is 2.0% of the total weight of the raw materials of the mixture, and the amount of magnesite ore is 1.0% of the total weight of the raw materials of the mixture. The dosage is 4.5% 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 th...

Example Embodiment

[0038] Example 3

[0039] The method is the same as in Example 1, the difference is:

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

[0041] (2) Weigh 60% of the fine material as the raw material for small pellets; the amount of quicklime is 3.0% of the total weight of the raw materials for the small pellets, and the amount of coke powder is 2.0% of the total weight of the raw materials for the small pellets;

[0042] (3) The amount of quicklime in the raw material of the mixture is 1% of the total weight of the raw material of the mixture, the amount of limestone is 4.0% of the total weight of the raw material of the mixture, the amount of magnesite ore is 3.0% of the total weight of the raw material of the mixture, 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 ...

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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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