Steel ladle side-blowing powder-spraying molten steel refining device and method

A powder spraying and ladle technology, applied in the field of steel refining, can solve the problems of exposure to molten steel, production uncertainty, and reduced life of powder pipes, and achieve the effects of reducing labor intensity, increasing life, and reducing kinetic energy loss.

Active Publication Date: 2019-05-03
NORTHEASTERN UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, some researchers have conducted research on side-blowing powder injection. The disadvantage is that the powder injection device is a capillary steel pipe, and the steel pipe is pre-buried in the refractory material of the ladle wall, which will cause a great impact on production. Uncertainty, at the end of the furnace service, the refractory material of the ladle wall becomes thinner, and even the outer steel shell of the ladle is exposed. At this time, the powder pipe will be directly exposed to the molten steel, which will cause great harm
In addition, it is not advisable to place the powder pipe outside the shell of the ladle. The ladle will inevitably be bumped during the production process. Putting the powder pipe outside the ladle will greatly reduce the life of the powder pipe.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Steel ladle side-blowing powder-spraying molten steel refining device and method
  • Steel ladle side-blowing powder-spraying molten steel refining device and method
  • Steel ladle side-blowing powder-spraying molten steel refining device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, a ladle side blowing powder injection device for refining molten steel includes a ladle used for refining molten steel 1, a powder spraying tank used for powder spraying and air supply 2, used for injecting powder into the ladle 1 and The side-blown powder-spraying air-permeable brick 3 for gas and the bottom-blown air-permeable brick 4 for blowing and stirring molten steel. The ladle 1 includes the side wall of the ladle and the bottom of the ladle. The side-blown powder-injecting ventilating brick 3 is embedded in the side wall of the ladle, the bottom-blowing ventilating brick 4 is embedded in the bottom of the ladle, and the side-blowing powder-injecting ventilating brick 3 and the powder spraying tank 2 are sprayed The short tube 5 is connected.

[0034] Such as figure 2 As shown, the device of this embodiment includes a side-blown powder-spraying air-permeable brick 3. The side-blown powder-injected air-permeable brick 3 is cylindrical, a...

Embodiment 2

[0039] The difference between the ladle side blowing powder injection refining liquid steel device provided in this embodiment and the ladle side blowing powder injection refining liquid steel device provided in Example 1 is as follows: image 3 , 4 As shown, four side-blown powder-injected air-permeable bricks 3 are evenly embedded on the side wall of the ladle, and the side-blown powder-injected air-permeable brick 3 is in the shape of a truncated cone, and the upper mouth diameter of the circular cone is 120 mm. Such as Figure 5 As shown, each side-blown powder-injected air-permeable brick 3 includes pores 7 radially distributed on the side-blown powder-injected air-permeable brick 3, a total of 40 channels, each having a diameter of 0.2 mm. Preferably, the channel 7 can be divided into an inner channel and an outer channel according to the position relationship, the length of the inner channel is 40 mm, and the length of the outer channel is 50 mm.

[0040] In this embodimen...

Embodiment 3

[0042] The difference between the ladle side blowing powder injection refining molten steel device provided in this embodiment and the ladle side blowing powder injection refining molten steel device provided in Example 1 is that six side blowing powder injection devices are evenly embedded on the side wall of the ladle Breathable bricks, and the side-blown powder sprayed bricks are square. Each side-blown powder-injected air-permeable brick includes holes radially distributed on the side-blown powder-injected air-permeable brick. There are 10 holes in total, and the diameter of each hole is 3mm.

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
lengthaaaaaaaaaa
lengthaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of steel and iron refining, and particularly relates to a steel ladle side-blowing powder-spraying molten steel refining device and a method. The steel ladle side-blowing powder-spraying molten steel refining device comprises a steel ladle, a powder-spraying tank, side-blowing powder-spraying air permeable bricks and bottom-blowing air permeable bricks;the steel ladle comprises a steel ladle side wall and a steel ladle bottom, the side-blowing powder-spraying air permeable bricks are embedded at the steel ladle side wall, the bottom-blowing air permeable bricks are embedded at the steel ladle bottom, and the side-blowing powder-spraying air permeable bricks and the powder-spraying tank are connected through a pipeline. According to the steel ladle side-blowing powder-spraying molten steel refining device and the method, powder-spraying elements are not blocked and are long in service life.

Description

Technical field [0001] The invention belongs to the technical field of steel refining, and in particular relates to a device and method for refining molten steel by side blowing powder injection on a ladle. Background technique [0002] With the upgrading of social industries, people have higher and higher requirements for the quality of steel, which requires the harmful elements in steel to be as low as possible, such as elements such as sulfur. Now people have succeeded in spraying powder by blowing at the bottom of the ladle, but the life of the breathable brick encountered in the powder spraying process is low, and the problem of powder congestion cannot be ignored. [0003] After in-depth study of the reduced life of the breathable bricks and the bricks with congested gaps, it was found that there were a series of pits in the center of the blocked breathable bricks. At the end of pouring steel, the remaining molten steel and liquid slag remained at the core of the breathable b...

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): C21C7/064
Inventor 娄文涛刘壮王贺朱苗勇
Owner NORTHEASTERN UNIV
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