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

A production process for improving the desulfurization efficiency of eaf-lf molten steel refining process

An EAF-LF, refining process technology is applied in the field of production technology for improving desulfurization efficiency in molten steel refining process, can solve problems such as being difficult to achieve, and achieve the effects of short time consumption, improved desulfurization effect, and simple production process

Active Publication Date: 2021-11-12
CENT SOUTH UNIV
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The test found that before this process was used, the desulfurization time was 40 minutes, and it was difficult to achieve the goal of [S]≤25ppm

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
  • A production process for improving the desulfurization efficiency of eaf-lf molten steel refining process
  • A production process for improving the desulfurization efficiency of eaf-lf molten steel refining process
  • A production process for improving the desulfurization efficiency of eaf-lf molten steel refining process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] according to figure 2 The process operation; the details are as follows:

[0044] Electric arc furnace steelmaking is used, when the temperature reaches 1550-1600 degrees Celsius; 105 tons of steel are tapped, 100Kg of aluminum particles, 150Kg of refining slag, and 600Kg of limestone are added to the molten steel; Minutes later, enter the LF furnace, sample L1; then add 20Kg aluminum, 300Kg lime, 50Kg calcium carbide (calcium carbide), 150Kg refining slag and melt at 1550-1600 degrees Celsius for 10 minutes, sample L2, then add 10kg aluminum, 200Kg lime, Carbide 40kg, 50Kg refining slag, continue to smelt for 10 minutes, sample L3; then continue to add 100kg of lime, stir for 5 minutes, sample L4; after stirring, leave the station. The composition analysis of each sampling is shown in Table 2;

[0045] Table 2

[0046] C Si mn P Cu Ni Cr Mo v Nb Ti Al Ca S [O] E1 0.17 0.085 0.12 0.005 0.044 0.02 0.083 0.035 0 0.0004 0...

Embodiment 2

[0049] Others are consistent with Example 1, except that the composition of the electric furnace tapping is slightly different; the composition of each sampling is shown in Table 3;

[0050] C Si mn P Cu Ni Cr Mo V Nb Ti Al Ca S [O] E1 0.16 0.085 0.12 0.005 0.040 0.04 0.085 0.034 0 0.0003 0.0002 0.16 - 0.0268 180ppm L1 0.26 0.28 0.39 0.0070 0.062 0.021 0.44 0.060 0.070 0.020 0.25 0.032 - 0.0146 L2 0.31 0.31 0.41 0.0075 0.055 0.020 0.45 0.080 0.080 0.020 0.26 0.033 - 0.0062 L3 0.33 0.32 0.43 0.0092 0.052 0.021 0.50 0.082 0.082 0.032 0.25 0.032 - 0.0029 L4 0.31 0.37 0.45 0.0088 0.058 0.022 0.515 0.081 0.072 0.031 0.26 0.040 - 0.002

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 a production process for improving the desulfurization efficiency of EAF-LF molten steel in the refining process. The process adopts electric arc furnace endpoint carbon control, electric arc furnace oxygen leaving steel tapping process, slagging process outside the furnace, LF segmental desulfurization technology, The LF bottom blowing argon process and alloy feeding process produce ultra-low sulfur steel grades. While reducing the sulfur content of molten steel, it can quickly reduce the sulfur content in molten steel to the ideal value, and it only takes 25 minutes. The advantages of the present invention are: (1) the production process is simple, the time consumption is short, and the desulfurization speed is fast; (2) the excessive loss of molten steel temperature is reduced, and the purpose of reducing energy consumption can be achieved in the production process; Raw materials can greatly improve the desulfurization effect; (4) The final sulfur content of molten steel can be controlled at [S]≤25ppm.

Description

technical field [0001] The invention relates to the field of the refining process outside the electric arc furnace steelmaking furnace, in particular to a production process for improving the desulfurization efficiency of the molten steel refining process. Background technique [0002] With the increasingly serious environmental problems and the increasingly scarce resources and energy, the reuse of scrap steel has become the only way for the iron and steel smelting industry. More and more steel mills use electric arc furnaces to smelt scrap steel. Not only because electric arc furnaces can reduce environmental pollution, but also, electric arc furnace steelmaking can greatly reduce energy consumption and save smelting costs. At the same time, in order to meet people's requirements on the performance of steel products, desulfurization methods for electric arc furnace steelmaking have emerged one after another. [0003] The traditional electric arc furnace smelting is divide...

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): C21C5/52C21C7/064C21C1/02C22C33/06C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50
CPCC21C1/02C21C5/52C21C7/0006C21C7/064C22C33/06C22C38/002C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50Y02P10/20
Inventor 王万林张同生李人升戴诗凡彭建飞毛松黄道远
Owner CENT SOUTH UNIV
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