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

Production method of low-carbon and medium-carbon steel

A production method and technology for low carbon steel, applied in the fields of iron and steel metallurgy and continuous casting, can solve problems such as increased steelmaking cost, and achieve the effects of improving the pourability of molten steel and alleviating the blockage of continuous casting nozzles

Active Publication Date: 2013-03-13
PANGANG GRP PANZHIHUA STEEL & VANADIUM +1
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent adopts a calcium treatment process to improve the pourability of molten steel, but this method will increase the cost of steelmaking

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

example 1

[0032] Q195 steel is produced by 120t converter smelting, argon blowing after tapping, and 200×200mm billet continuous casting process. Usually, the aluminum content [A1] in the finished steel product is less than 0.01%, and the finished product [C] content is 0.07% to 0.11%. , using silicon calcium barium deoxidation.

[0033] The sulfur content of the molten iron blended into the converter is 0.011%, and the [C] content of the converter smelting end point is 0.05%. When the steel is tapped to about 25%, 4.1Kg / ton of steel calcium calcium barium is added as a deoxidizer to deoxidize the molten steel, and add 6.3Kg / ton of steel ferromanganese and 0.8Kg / ton of steel ferrosilicon are alloyed in molten steel, and 3.0Kg / ton of steel ladle slag modifier is added to the ladle when the steel is tapped to about 85%. Refining by argon blowing after the steel is tapped, the intensity of argon blowing is 1.3NL / (ton of steel·min), the oxygen is fixed when the argon is blowing for 8 minute...

example 2

[0036] B steel is produced by 120t converter smelting, argon blowing after tapping, and Φ200mm round billet continuous casting. Usually, the aluminum content [Al] in the finished steel product is less than 0.01%, and the [C] content in the finished product is 0.17% to 0.22%. , using silicon calcium barium deoxidation.

[0037] The sulfur content of the molten iron blended into the converter is 0.012%, and the [C] content of the converter smelting end point is 0.06%. When the steel is tapped to about 30%, 3.2Kg / ton of silicon-calcium-barium alloy is added as a deoxidizer to deoxidize the molten steel, and Add 7.2Kg / ton of steel ferromanganese, 1.1Kg / ton of steel ferrosilicon and 1.4Kg / ton of steel carburizer for molten steel alloying and carburization, and add 2.2Kg to the ladle when tapping reaches about 80% Ladle slag modifier per ton of steel. Refining by argon blowing after the steel is tapped, the intensity of argon blowing is 1.1NL / (ton of steel·minute), the oxygen is fi...

example 3

[0040] 45 steel is produced by smelting in a 120t converter, argon blowing after tapping, and continuous casting of 200×200mm billets. Usually, the aluminum content of the finished product [Al] of this steel is less than 0.01%, and the content of the finished product [C] is 0.42% to 0.50 %, using silicon calcium barium deoxidation.

[0041] The sulfur content of the molten iron blended into the converter is 0.009%, and the [C] content of the converter smelting end point is 0.10%. When the steel is tapped to about 30%, 2.3Kg / ton of steel calcium calcium barium is added as a deoxidizer to deoxidize the molten steel, and add 2.8Kg / ton steel ferrosilicon, 7.3Kg / ton steel ferromanganese and 4.1Kg / ton steel recarburizer for molten steel alloying and carburization, add 1.2Kg / ton to the ladle when the steel is about 85% Ladle slag modifier for steel. Refining is carried out by blowing argon after the steel is tapped. The intensity of blowing argon is 1.0NL / (ton steel·minute), and the...

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
Gas outputaaaaaaaaaa
Login to View More

Abstract

The invention provides a production method of medium-low- carbon and medium-carbon steel. The method comprises the following steps of controlling sulfur content in molten iron to be less than 0.015 percent by weight; primarily refining the molten iron to form molten steel, and discharging the molten steel into a ladle; adding 1.5kg to 4.5kg of deoxidizing agent per ton steel with aluminum content being not greater than 2.0 percent by weight into the ladle according to the oxygen content of the molten steel at a primary refining terminal point during the process for tapping steel of 20 percent to 30 percent by weight; adding 1.0 to 3.5kg ladle slag modifier per ton steel into the ladle so as to control the sum of the ferric oxide (FneO) content and the manganese oxide (MnO) content to be less than or equal to 10 percent by weight in the process for tapping 80 to 90 percent by weight of steel; blowing argon to refine the molten steel; and adopting a continuous casting technique to pour the molten steel so as to acquire a casting blank. Due to the adoption of the method, the refining of a low-frequency (LF) ladle furnace is not needed, the calcium treatment is not needed, the castability of the molten steel is effectively improved, the water gapnozzle blockage phenomenon is alleviated, the turndish continuous casting furnace number of low-aluminum-content low-carbon and medium-carbon steel in the continuous casting process of low-aluminum-content medium-low carbon steel is more than 10, and a purpose of economical production can be realized.

Description

technical field [0001] The invention relates to the technical fields of iron and steel metallurgy and continuous casting, and more specifically relates to a method capable of increasing the number of continuous casting furnaces for medium and low carbon steel. Background technique [0002] In the prior art, in the technological process of adopting the continuous casting process to cast medium and low carbon steel, due to the high melting point aluminum oxide (Al 2 o 3 ) series inclusions and calcium silicate (CaSiO 3 ) and other inclusions are easy to adhere to the inner wall of the submerged nozzle of the crystallizer, causing it to be blocked, so the number of continuous casting furnaces per tundish is relatively low (for example, less than 6 furnaces), the production cost increases, and the production organization is greatly affected. big impact. Especially the casting section is small (for example, the section is not more than 40000mm 2 ) of the continuous casting sl...

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
IPC IPC(8): B22D1/00B22D11/116B22D11/117B22D11/111
Inventor 杨森祥梁新腾黄德胜郭奠荣陈亮曾建华陈天明李盛
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com