Method for removing titanium from converter molten iron

A technology for removing titanium and molten iron, applied in the manufacture of converters, etc., can solve the problems of not effectively stabilizing the detitanium of molten iron in converters, and achieve the effects of improving the desulfurization effect, avoiding titanium return, and reducing the consumption of desulfurizers

Active Publication Date: 2020-09-08
BEIJING SHOUGANG CO LTD
View PDF5 Cites 1 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of steelmaking, and particularly relates to a method for removing titanium from converter molten iron. The method comprises the following steps of: beforetapping of an iron plant, adding a titanium removing agent into molten iron of a blast furnace tapping channel; then, in the tapping process of a steel plant backflow station, adding the titanium removing agent into an iron ladle; before desulfurization of a KR desulfurization station, removing titanium removing slag; after desulfurization of the KR desulfurization station is completed, carrying out converter blowing; and after converter blowing is completed, tapping, wherein the mass ratio of the titanium removing agent to the molten iron of the blast furnace tapping channel is (1.5-1.8) kg:(0.9-1.0) t; in the tapping process of the steel plant backflow station, the adding rate of the titanium removing agent is 60-260kg / min; and the mass ratio of the titanium removing agent to the molteniron in the iron ladle is (2-8) kg: (0.9-1.0) t. According to the method, the titanium removing agent, the titanium removing slag, converter blowing and the like are optimized and controlled, so thatsteel with low titanium content and various corresponding products are obtained, and the average titanium content is controlled to be 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap