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Preparation method of high-chromium high-vanadium type vanadium-titanium ore pellets

A vanadium-titanium ore and high-vanadium technology, which is applied in the field of preparation of vanadium-titanium ore pellets, can solve the problems of over-melting, agglomeration or nodulation of the pellets, and affect the quality of the finished balls, so as to achieve stable composition and guarantee Yield, the effect of improving the quality of green pellets

Inactive Publication Date: 2012-06-27
HEILONGJIANG JIANLONG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that the existing process for preparing high chromium-high vanadium type vanadium-titanium magnetite pellets is prone to over-melting, resulting in agglomeration or nodules, which affects the quality of finished balls, and provides a A kind of preparation method of high chromium-high vanadium type vanadium-titanium ore pellet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0013] Embodiment 1: The preparation method of high chromium-high vanadium type vanadium-titanium ore pellets is achieved through the following steps:

[0014] 1. Ingredients: Weigh 45-50 parts of vanadium-titanium ore, 50-55 parts of iron material, and 1.8-2.1 parts of bentonite by weight, wherein the iron material is 11%-28% by weight of iron ore powder and It is composed of 72% to 89% of ultra-fine iron powder, the particle size of iron ore powder is 0.5mm to 3.5mm, and the fineness of ultra-fine iron powder is -325 mesh ≥ 85% or -200 mesh ≥ 95%;

[0015] 2. Mixing and drying: Mix the vanadium-titanium ore, iron material and bentonite weighed in step 1 evenly, and dry to reduce the moisture content of the mixture to 6% to 8%;

[0016] 3. Pelletizing: During the pelletizing process, add water to control the moisture content of the green pellets at 9% to 11%;

[0017] 4. Raw ball screening: select the raw balls with a particle size range of 8 to 16 mm in step 3, and return t...

specific Embodiment approach 2

[0021] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, 46-49 parts by weight of vanadium-titanium ore, 51-54 parts of iron material, and 1.9-2.0 parts of bentonite are weighed. Others are the same as the first embodiment.

specific Embodiment approach 3

[0022] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 5, the temperature of the drying bed is controlled to be 520-580°C, the temperature of the fume hood is controlled to be 90-140°C, and the thickness of the material layer is controlled to be 160-190mm . Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method of high-chromium high-vanadium type vanadium-titanium ore pellets. The invention relates to a preparation method of vanadium-titanium ore pellets. With existing high-chromium high-vanadium type vanadium-titanium ore pellet preparation technologies, pellet superfusion is possible to occur, and pellet caking or nodulation are possible to occur, such that the quality of finished pellet product is influenced. The invention aims at solving the problem. The preparation method of the high-chromium-high vanadium type vanadium-titanium ore pellets comprises the steps of material blending, mixed drying, palletizing, green pellet screening, and shaft furnace roasting. Vanadium content of vanadium-titanium powder in the vanadium-titanium pellets is higherthan 4.5%, such that a requirement by blast furnace vanadium-titanium smelting is satisfied. The high-chromium-high vanadium type vanadium-titanium ore pellet preparation method provided by the invention is used for preparing vanadium-titanium ore pellets.

Description

technical field [0001] The invention relates to a preparation method of vanadium-titanium ore pellets. Background technique [0002] In the prior art, the high-chromium-high-vanadium type vanadium-titanium-magnetite mineral composition is complex, and the thermal operation system should not be determined during the roasting in the shaft furnace, which may easily lead to over-melting of the pellets, agglomeration or nodules, and affect the quality of the finished pellets. . SUMMARY OF THE INVENTION [0003] The present invention aims to solve the problem that the existing process for preparing high-chromium-high-vanadium type vanadium-titanium magnetite pellets is prone to over-melting, so as to agglomerate or nodulate, which affects the quality of finished balls, and provides a A preparation method of high chromium-high vanadium type vanadium-titanium ore pellets. [0004] The preparation method of the high-chromium-high-vanadium type vanadium-titanium ore pellet of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/243C22B1/214
Inventor 张勇姚本金陈立军陈立文曲刚巩明健张路春纪守考曹淑华
Owner HEILONGJIANG JIANLONG IRON & STEEL
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