Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Refining device and method for controlling nitrogen content of molten steel

A technology of nitrogen and content in molten steel, applied in the field of continuous steel, can solve problems such as difficult application, major hidden dangers buried in production safety, splashing of molten steel and steel slag, etc., and achieve the effect of easy operation, small investment, and improved cleanliness

Active Publication Date: 2017-07-21
ANGANG STEEL CO LTD
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the top air blowing gun blows argon to the slag surface of the ladle, it is very easy to cause splashing of molten steel and steel slag, burying a major hidden danger for production safety, and it is difficult to apply in production

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
  • Refining device and method for controlling nitrogen content of molten steel
  • Refining device and method for controlling nitrogen content of molten steel
  • Refining device and method for controlling nitrogen content of molten steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] Depend on figure 1 It can be seen that the refining device for controlling the nitrogen content of molten steel in the present invention is mainly composed of a lifting hydraulic cylinder 1 , an immersion tube 2 , a furnace cover 3 , an electrode 5 , a feed bin 6 and a ladle 9 . The lifting hydraulic cylinder 1 is fixed on the ground, and the front end of the piston rod of the lifting hydraulic cylinder 1 is fixed horizontally with a connecting rod. There is a silo 6 above the feed inlet, and the immersion tube 2 made of refractory material is fixed on the steel structure under the furnace cover 3. The diameter of the furnace cover 3 is 1 / 3 to 1 / 2 of the diameter of the ladle 9, so the furnace cover 3 Lift and hang on the top of the ladle 9 by the lifting hydraulic cylinder 1 and the connecting rod.

[0029] The concrete steps of the present invention's control molten steel nitrogen content method are:

[0030] 1. Preheat the immersion tube 2 under the furnace cover 3...

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 provides a refining device for controlling the nitrogen content of molten steel. The refining device comprises a lifting hydraulic cylinder, immersing pipes, a furnace cover, electrodes, a bin and a steel ladle. The front end of a connecting rod at the front end of a piston rod of the lifting hydraulic cylinder is welded to the furnace cover. The electrodes are arranged in the middle of the furnace cover. The bin is arranged above a feeding port in one side. The immersing pipes are fixed below the furnace cover. The furnace cover is lifted and hung above the steel ladle through the lifting hydraulic cylinder. Compared with a conventional method, the contact opportunity between the molten steel and air can be reduced, and the nitrogen increasing amount of the molten steel is not larger than 0.0003%; the temperature drop of the molten steel in the treatment process is reduced, and the temperature loss is reduced by 50%; and inclusions in the molten steel are effectively removed, the cleanliness of the molten steel is improved, the use amount of pre-melted slag is reduced by 40%, and cost is reduced. The refining device is simple in structure, easy to operate, low in investment and free of influences on normal operation of other equipment, and the immersing pipes can be repeatedly used.

Description

technical field [0001] The invention belongs to the technical field of continuous steel, and in particular relates to a refining device and method capable of controlling the nitrogen content of molten steel. Background technique [0002] The role of nitrogen in steel has two sides: on the one hand, nitrogen, as an interstitial solid solution element, can greatly increase the strength of steel. On the other hand, nitrogen will significantly reduce the ductility of steel, which is particularly prominent in ultra-low carbon steel; in terms of toughness, nitrogen will greatly increase the ductile-brittle transition temperature; nitrogen forms nitrides with aluminum, titanium and other elements, and in a certain In some cases, it will lead to hot embrittlement of steel; in addition, the delayed precipitation of nitrogen at room temperature is also related to some aging effects of steel. For most steel types, nitrogen is regarded as an impurity element in steel. When the nitrogen...

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 Patents(China)
IPC IPC(8): C21C7/072C21C7/076
CPCY02P10/20
Inventor 李广帮廖相巍张晓光贾吉祥赵亮丁丽华朱晓雷
Owner ANGANG STEEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products