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A method for removing titanium from molten iron in a converter

A technology for removing titanium and molten iron, which is applied in the manufacture of converters, etc., can solve the problems of not effectively stabilizing the removal of titanium from molten iron in converters, and achieve the effect of ensuring sufficient reaction

Active Publication Date: 2022-01-04
BEIJING SHOUGANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no effective, stable and low-cost method for detitanium removal from molten iron in the converter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] In this embodiment, the method for removing titanium from molten iron in the converter comprises the following steps:

[0082] (1) before ironworks tapping, add iron oxide scale to the molten iron of blast furnace tapping channel, by mass percentage, the mass ratio of described oxide scale and the molten iron of described blast furnace tapping channel is 1.5kg:0.9t; Before starting detitanium removal, in terms of mass percentage, the molten iron in the tapping channel of the blast furnace contains: Ti≤0.1%, Si 0.35-0.40%; : Ti 0.08~0.098%;

[0083](2) The molten iron obtained in step (1) is transported to the steelworks by torpedo tanks, and is tapped at the pouring station, wherein during the tapping process at the pouring station of the steel mill, pellets are added to the iron ladle, and the pellets are The addition rate of the iron is 60kg / min; In terms of mass percentage, the mass ratio of the pellets and the molten iron in the iron ladle is 2kg:0.9t; The pellets ...

Embodiment 2

[0089] In this embodiment, the method for removing titanium from molten iron in the converter comprises the following steps:

[0090] (1) before ironworks tapping, add iron oxide scale to the molten iron of blast furnace tapping channel, by mass percentage, the mass ratio of described oxide scale and the molten iron of described blast furnace tapping channel is 1.8kg:1.0t; Before starting detitanium removal, in terms of mass percentage, the molten iron in the tapping channel of the blast furnace contains: Ti≤0.1%, Si 0.35-0.40%; : Ti 0.08~0.098%;

[0091] (2) The molten iron obtained in step (1) is transported to the steelworks by torpedo tanks, and is tapped at the pouring station, wherein during the tapping process at the pouring station of the steel mill, pellets are added to the iron ladle, and the pellets are The addition rate of the iron is 224kg / min; In terms of mass percentage, the mass ratio of the pellets and the molten iron in the iron ladle is 5.3kg:1t; The pellet...

Embodiment 3

[0097] In this embodiment, the method for removing titanium from molten iron in the converter comprises the following steps:

[0098] (1) before ironworks tapping, add iron oxide scale to the molten iron of blast furnace tapping channel, by mass percentage, the mass ratio of described oxide scale and the molten iron of described blast furnace tapping channel is 1.5kg:0.9t; Before starting detitanium removal, in terms of mass percentage, the molten iron in the tapping channel of the blast furnace contains: Ti≤0.1%, Si 0.35-0.40%; : Ti 0.08~0.098%;

[0099] (2) The molten iron obtained in step (1) is transported to the steelworks by torpedo tanks, and is tapped at the pouring station, wherein during the tapping process at the pouring station of the steel mill, pellets are added to the iron ladle, and the pellets are The addition rate of the iron is 260kg / min; In terms of mass percentage, the mass ratio of the pellets and the molten iron in the iron ladle is 8kg:1.1t; The pellet...

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PUM

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Abstract

The invention belongs to the technical field of steelmaking, and specifically relates to a method for detitanium removal of molten iron in a converter: before tapping in an iron plant, adding a detitanium agent to the molten iron in a blast furnace tapping trough; Add detitanium agent into the iron ladle; remove the detitanium slag before desulfurization at KR desulfurization station; In terms of mass percentage, the mass ratio of the detitanium agent to the molten iron in the blast furnace tapping trough is (1.5-1.8) kg: (0.9-1.0) t; The addition rate of the titanium removal agent is 60-260kg / min; the mass ratio of the titanium removal agent to the molten iron in the ladle is (2-8)kg:(0.9-1.0)t. The method of the present invention optimizes and controls a series of titanium removal agents, titanium removal slag removal, converter blowing, etc., so as to obtain steel with low titanium content and various corresponding products thereof, and the average titanium content is controlled at 0.0005-0.0006%.

Description

technical field [0001] The invention belongs to the technical field of steelmaking, and in particular relates to a method for removing titanium from molten iron in a converter. Background technique [0002] Titanium in molten steel is very easy to form small and stable TiC and TiN. These fine inclusions will reduce the purity of steel, cause nodules in continuous casting water or mold fish, and then affect various properties of steel. Therefore, for high-quality pure steel, it is particularly important to control the titanium content in the steel. [0003] In addition, in the field of steelmaking technology, titanium is added as an alloying element in most steel grades. However, in a small number of steel grades (such as silicon steel), titanium element becomes a harmful element, and the existence of titanium element will affect the fatigue performance and electromagnetic performance of the steel grade. Generally, for steel grades such as silicon steel, the titanium conten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C1/04C21C1/02C21C5/28
CPCC21C1/04C21C1/02C21C5/28
Inventor 孙亮刘珍童刘风刚毕泽阳赵艳宇成天兵刘伟波
Owner BEIJING SHOUGANG CO LTD
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