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Titanium-rich pellet and production method thereof

A production method and pelletizing technology, applied in the field of iron and steel smelting, can solve the problems of smelting high-titanium pellets, unable to effectively protect the furnace bottom, unable to ensure stable content, etc. Effect

Active Publication Date: 2014-04-02
攀枝花钢企米易白马球团有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing pellets generally TiO 2 The content is less than 10%, which leads to the need to add high-titanium pellets to protect the bottom of the furnace in the use of blast furnaces. At the same time, high-titanium pellets cannot be smelted directly, and the TiO in the production of blast furnaces cannot be guaranteed. 2 The content is stable and cannot effectively protect the bottom of the furnace

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In this embodiment, raw materials 1, 2, and 3 are all vanadium-titanium magnetite, and 12kg of raw material 1 (which contains 27% iron and 20% titanium) and 25kg raw material 2 (which contains 44% iron and 17% titanium) , 68kg of raw material 3 (containing 52% iron and 10% titanium) and bentonite accounting for 2.2% of the total weight of the first three raw materials are mixed and placed in a pelletizing tray to make pellets (so that the falling strength of qualified green balls is 4.5 times* 0.5m, compressive strength is 7.8N / piece), dry and preheat the prepared pellets in the chain grate machine (the drying preheating speed of the chain grate machine is 2.8m / min, the drying temperature is 200°C, the drying time 5.35min, preheating temperature 850°C, preheating time 7.5min), roast the preheated pellets at 1180°C for 32min, then cool the pellets. The iron content of the product obtained in this embodiment is 45.54%, and the titanium content is 12.34%. The product of t...

Embodiment 2

[0040] In the present embodiment, each raw material 1 and 2 are vanadium-titanium magnetite, and 16kg of raw material 1 (wherein containing 27% of iron and 20% of titanium), 84kg of raw material 2 (of which containing 52% of iron and 14% of titanium) and The bentonite, which accounts for 1% of the total weight of the first two raw materials, is mixed and placed in the pelletizing tray to make pellets (so that the falling strength of qualified raw pellets is 4 times*0.5m, and the compressive strength is 7.5N / piece). The pellets are dried and preheated in the grate machine (the drying and preheating speed of the grate machine is 3.0m / min, the drying temperature is 150°C, the drying time is 5min, the preheating temperature is 800°C, and the preheating time is 7min). The final pellets are calcined at 1150°C for 30 minutes, and then the pellets are cooled. The iron content of the product obtained in this embodiment is 46.82%, and the titanium content is 14.59%. The product of this...

Embodiment 3

[0042] In this embodiment, each raw material 1, 2, and 3 are vanadium-titanium magnetite, and 15kg of raw material 1 (which contains 42% iron and 17% titanium), and 40kg raw material 2 (which contains 54.5% iron and 10.8% titanium) ), 45kg of raw material 3 (of which 44% iron and 13% titanium) and bentonite accounting for 2.5% of the total weight of the first three raw materials are mixed evenly, and placed in a pelletizing tray to make pellets (so that the qualified green pellets have a drop strength of 5.5 times * 0.5m, compressive strength 8.3N / piece), dry and preheat the prepared pellets in the chain grate machine (the drying and preheating speed of the chain grate machine is 3.0m / min, the drying temperature is 250°C, The drying time is 5 minutes, the preheating temperature is 900°C, and the preheating time is 7 minutes), the preheated pellets are roasted at 1130°C for 33 minutes, and then the pellets are cooled. The iron content of the product obtained in this embodiment ...

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Abstract

The invention belongs to the field of steel and iron smelting, and in particular relates to a titanium-rich pellet and a production method thereof. The titanium-rich pellet contains 10-15% of TiO2 and 40-55% of TFe. Furthermore, the invention provides a production method of the titanium-rich pellet, and the production method comprises the steps of preparing materials, pelletizing, drying, pre-heating, baking and cooling to obtain a finished product. The titanium-rich pellet prepared by the method disclosed by the invention not only can serve as a raw material when making steel in a blast furnace, but also can protect furnace bottom of the blast furnace used for making steel, and the titanium-rich pellet is good in effect.

Description

technical field [0001] The invention belongs to the field of iron and steel smelting, and in particular relates to a titanium-rich pellet and a production method thereof. Background technique [0002] Existing pellets generally TiO 2 The content is less than 10%, which leads to the need to add high-titanium pellets to protect the bottom of the furnace in the use of blast furnaces. At the same time, high-titanium pellets cannot be smelted directly, and the TiO in the production of blast furnaces cannot be guaranteed. 2 The content is stable and cannot effectively protect the bottom of the furnace. Therefore, by producing titanium-rich pellets, solve the problem of TiO in blast furnace production 2 Content stability, while improving the application range of vanadium-titanium magnetite concentrate (vanadium-titanium-iron associated ore). Contents of the invention [0003] The first technical problem to be solved by the present invention is to provide a titanium-rich pellet...

Claims

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Application Information

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IPC IPC(8): C22B1/00C21B5/00
Inventor 覃金平马刚张文能张永康陈武强李丹杨晓勇
Owner 攀枝花钢企米易白马球团有限公司
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