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Method for removing titanium in molten iron

A technology for detitanium removal and molten iron, which is applied in the manufacture of converters, etc., can solve the problems of unsatisfactory detitanium removal effect and low efficiency of molten iron, and achieve the effect of ensuring the efficiency and stability of detitanium removal

Active Publication Date: 2014-04-02
SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for removing titanium from molten iron, which solves the technical problems of unsatisfactory and inefficient removal of titanium from molten iron in the prior art

Method used

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  • Method for removing titanium in molten iron

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Effect test

Embodiment 1

[0022] The initial Ti0.18%, Si0.37%, and Mn0.123% of molten iron before non-oriented electrical steel smelting cannot meet the requirements of Ti≤0.12% for medium-grade non-oriented silicon steel, which may cause the improvement of the finished product and affect the product performance.

[0023] Step: 201: add titanium removal agent to the torpedo tank before tapping in the iron factory, so that on the one hand, the impact of molten iron can be used to remove titanium from the torpedo tank, and the titanium removal reaction can be continued during the process of transporting the molten iron to steelmaking. After steelmaking, the Ti content of molten iron drops to 0.13%. In addition, before ironmaking and tapping, add the detitanium agent in bags into the torpedo tank, and use the waste heat of the torpedo tank to bake before use. After baking for 32 minutes, tap the iron At the same time, the impact of molten iron is used to complete the oxidation reaction of titanium removal ...

Embodiment 2

[0033] The initial Ti0.088%, Si0.47%, and Mn0.14% of molten iron before smelting of non-oriented electrical steel cannot meet the requirement of Ti≤0.06% for medium-grade non-oriented silicon steel, which may cause the improvement of the finished product and affect the product performance.

[0034] Step 301: Add titanium removal agent to the torpedo tank before tapping in the iron factory, so that on the one hand, the impact of molten iron can be used to remove titanium from the torpedo tank, and the titanium removal reaction can be continued during the process of transporting the molten iron to steelmaking. After steelmaking, the Ti content of molten iron is reduced to 0.13%. In addition, before ironmaking and tapping, add the detitanium agent in bags into the torpedo tank, and use the residual heat of the torpedo tank to bake before use. After baking for 32 minutes, when tapping The impact of molten iron is used to complete the oxidation reaction of titanium removal agent and...

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Abstract

The invention discloses a method for removing titanium in molten iron and belongs to the field of metallurgy continuous casting. The method comprises the following steps: adding a titanium removal agent into a torpedo ladle before tapping in ironworks, and tapping, so that the titanium removal agent and the molten iron are reacted completely, and the titanium removal product floats upwards; adding the titanium removal agent into a ladle in front of a torpedo ladle station in the ironworks, carrying out oxidizing reaction between the titanium removal agent and the molten iron by virtue of steel flow impact during tapping, and removing the titanium; removing titanium removal residues in front of a sulfur removal station before sulfur removal, and performing molten iron sulfur removal and converter blowing. According to the method, the titanium removal agent can be respectively added into the torpedo ladle and the ladle, and the addition amount of the titanium removal agent is adjusted according to the temperature of the molten iron and alkalinity of molten iron slag, so that the titanium removal efficiency is guaranteed. In addition, the titanium removal is influenced due to an activity coefficient of TiO2 in the slag, and the effect of removing titanium in the molten iron can be effectively stabilized.

Description

technical field [0001] The invention belongs to the field of metallurgical continuous casting, in particular to a method for removing titanium from molten iron. Background technique [0002] Since the titanium composition and its compounds have a great influence on the fatigue performance and electromagnetic performance of some steel types, with the improvement of the quality of steel varieties, higher and stricter requirements are put forward for the titanium content in molten steel. Steel, bearing steel, cord steel, etc., all need to control the titanium content at an ultra-low level, and some steel types have been required to be controlled at 20×10 -6 or lower. [0003] In view of the characteristics of the process, ironworks must use a certain amount of titanomagnetic ore to protect the furnace to prolong the service life, but the steelmaking process is difficult to carry out deep detitanium removal through oxidation under high temperature conditions, and the titanium i...

Claims

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Application Information

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IPC IPC(8): C21C1/04C21C7/04C21C5/28
Inventor 程林陈凌峰龚坚胡志远赵彦宇岳铁军赵金彦
Owner SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
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