Method for adding tundish covering agent for continuous casting

A continuous casting pouring and tundish technology, which is applied in the field of adding tundish covering agent, can solve the problems of low alkalinity covering agent with low content of alkaline oxide, slab quality that cannot meet the requirements, and cannot be fully absorbed, etc., to achieve Improve the quality of continuous casting pouring blanks and the qualified rate of finished products, reduce the content of secondary oxidation and non-metallic inclusions, and increase the effect of adsorption and inclusion capacity

Active Publication Date: 2019-06-28
TANGSHAN STAINLESS STEEL +1
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology helps prevent contamination during the process of continuously producing metal materials such as plates or pipings used in industrial processes like manufacturing. It involves applying an overlay material called tungsten coating onto the inside surfaces of these parts before they are placed into use. These coatings help reduce exposure to harmful gases from other sources while still allowing them to protect against corrosives caused by atmospheric agents. Overall this technique enhances the durability and performance of the part made through continuous casting techniques without causing defects due to insufficient coolant gas supply.

Problems solved by technology

This patents discuss how different types of coverings can affect the properties of molasses used in making steel products such as castability or weldable qualities. These covers have various technical effects depending upon their effectiveness over other materials present within them. However, current methods often result in poor metal quality due to these impurity elements being introduced into the melted steel while also causing unwanted side reactions between certain chemical substances inside the covered layer and surrounding areas.

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
  • Method for adding tundish covering agent for continuous casting
  • Method for adding tundish covering agent for continuous casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: The method for adding the tundish covering agent used for continuous casting and pouring adopts the following process.

[0023] The mass percentage of the main components of the tundish covering agent used is: SiO 2 3.2%, CaO 47.3%, MgO0.3%, Fe 2 o 3 0.4% and Al 2 o 3 35.0%, alkalinity 12.3.

[0024] Use the above method to add, start to add after 5 seconds of pouring, after adding five batches of covering agent, add a total of 25 bags, weighing 250kg.

[0025] During the casting process, the protection of the molten steel surface in the tundish can be clearly seen. After the tundish covering agent is added, the liquid level rises steadily as the casting progresses. After the molten steel is immersed in the protective sleeve, the liquid steel level does not fluctuate. The change trend of the sub-oxygen level in the pouring furnace is as follows figure 1 shown by figure 1 It can be seen that the oxygen content level in the first molten steel of the

Embodiment 2

[0026] Embodiment 2: The method for adding the tundish covering agent used for continuous casting and pouring adopts the following process.

[0027] The mass percentage of the main components of the tundish covering agent used is: SiO 2 3.0%, CaO 42.6%, MgO 0.2%, Fe 2 o 3 1.0% and Al 2 o 3 37.4%, alkalinity 10.7.

[0028] Use the above method to add, start to add after 5 seconds of pouring, after adding five batches of covering agent, add a total of 25 bags, weighing 250kg.

[0029] During the casting process, the protection of the molten steel surface in the tundish can be clearly seen. After the tundish covering agent is added, the liquid level rises steadily as the casting progresses. After the molten steel is immersed in the protective sleeve, the liquid steel level does not fluctuate. The change trend of the sub-oxygen level in the pouring furnace is as follows figure 2 shown by figure 2 It can be seen that the oxygen content level in the first molten steel of t

Embodiment 3

[0030] Embodiment 3: The method for adding the tundish covering agent used for continuous casting and pouring adopts the following process.

[0031]The mass percentage of the main components of the tundish covering agent used is: SiO 2 2.5%, CaO 43.7%, MgO0.2%, Fe 2 o 3 0.8% and Al 2 o 3 40.0%, alkalinity 11.3.

[0032] Use the above method to add, start to add after 6 seconds of pouring, after five batches of covering agent are added, a total of 25 bags are added, weighing 250kg.

[0033] During the casting process, the protection of the molten steel surface in the tundish can be clearly seen. After the tundish covering agent is added, the liquid level rises steadily as the casting progresses. After the molten steel is immersed in the protective sleeve, the liquid steel level does not fluctuate. The oxygen content level in the first molten steel of the pouring furnace will decrease rapidly, indicating that the addition of the high-alkalinity tundish covering agent durin

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 discloses an adding method for tundish covering agents used for continuous casting starting. The method comprises the steps that after a large ladle starts to cast and flow down for 5-8 s, the first batch of tundish covering agents starts to be added into an impact area; after the weight of molten steel of a tundish is 5 t, the second batch of tundish covering agents starts to be added into a stopper area; after the weight of the molten steel of the tundish is 10 t, the third batch of tundish covering agents starts to be added into the impact area; after the weight of the molten steel of the tundish is 15 t, the fourth batch of tundish covering agents starts to be added into the stopper area; after the weight of the molten steel of the tundish is 20 t, the fifth batch of tundish covering agents starts to be added into the impact area; and the alkalinity of the tundish covering agents is larger than or equal to 10. The tundish covering agents with the high alkalinity are adopted to guarantee capacity of absorbing inclusions; and according to the adding mode, air isolation is guaranteed, secondary oxidation of the molten steel is reduced, the long-term problem of standard exceeding of the oxygen content and the nitrogen content of continuous casting production is solved, and significant economic benefits are achieved.

Description

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

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
Owner TANGSHAN STAINLESS STEEL
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