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

Dephosphorizing process of electric furnace steel making

A technology of electric furnace steelmaking and furnace charge, which is applied in the field of iron and steel metallurgy, can solve the problems of extended electric furnace smelting time, large consumption of electric energy and lime, and reduced production efficiency, and achieve the effects of shortening the smelting cycle, reducing costs, and broad application prospects

Inactive Publication Date: 2011-11-23
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +1
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the production of low-phosphorus steel has been realized, multiple slag removal and lime addition will not only consume a lot of electric energy and lime, but will also prolong the smelting time of the electric furnace and reduce production efficiency

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

Embodiment 1

[0030] Embodiment 1 adopts the inventive method to produce dephosphorized molten steel

[0031] 70 tons of high-impedance ultra-high-power electric arc furnaces adopt the inventive method to produce 30CrMo (steel for high-pressure gas cylinder tubes), its process steps:

[0032] a. Steel and slag left at the eccentric bottom (steel and slag left at the eccentric bottom means that the tapping hole is not at the center of the furnace bottom, but deviates from the center of the furnace bottom for a certain distance, which is convenient for slag-free tapping). After tapping, scrap steel is added to the electric furnace 61.34t (including 6.81t of pig iron), mixed with 1500Kg of lime to make slag, mixed with 23.4t of molten iron.

[0033] b. For power supply, three oxygen burners are used to accelerate the melting of the metal charge. The power of each burner is 3.5MW. The metal charge is melted by 50-60%, and then 2000Kg of lime is added to form slag.

[0034] c. When the molten s...

Embodiment 2

[0038] Embodiment 2 adopts the inventive method to produce dephosphorized molten steel

[0039] The 70-ton high-impedance ultra-high-power electric arc furnace adopts the art of production of WB36CN1 (steel for nuclear power pipes), and its process steps:

[0040] a. Steel and slag left at the eccentric bottom (steel and slag left at the eccentric bottom means that the tapping hole is not at the center of the furnace bottom, but deviates from the center of the furnace bottom for a certain distance, which is convenient for slag-free tapping). After tapping, scrap steel is added to the electric furnace 62.64t (including 5t of pig iron), mixed with 1800Kg of lime to make slag, mixed with 21t of molten iron.

[0041] b. For power supply, three oxygen burners are used to accelerate the melting of the metal charge. The power of each burner is 3.5MW. The metal charge is melted by 50-60%, and then 2000Kg of lime is added to form slag.

[0042] c. When the temperature of the molten po...

Embodiment 3

[0046] Embodiment 3 adopts the inventive method to produce dephosphorized molten steel

[0047] The 70-ton high-impedance ultra-high-power electric arc furnace adopts the art of production of 27CrMo (steel for oil pipes), and its process steps:

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 relates to a dephosphorizing process of electric furnace steel making, belonging to the field of ferrous metallurgy. The invention provides a dephosphorizing process of electric furnace steel making low cost, comprising a step of slag discharge, and the molten steel temperature is more than 1560 DEG C during the step of slag discharge. Compared with dephosphorizing processes existedin the prior art, the dephosphorizing process disclosed in the invention has no need of adding dephosphorization agent to strengthen dephosphorization, only needs the step of slag discharge once, andthe quantity of slag can be reduced by more than 30%, the smelting cycle can be reduced by more than 5%, thus greatly reducing the cost of dephosphorization in steel-making. The invention provides a novel method for dephosphorization in steel-making, with a wide application prospect.

Description

technical field [0001] The invention relates to an electric furnace steelmaking dephosphorization method, belonging to the field of iron and steel metallurgy. Background technique [0002] In recent years, users' demand for pure steel is increasing. The reduction of impurity elements such as phosphorus and sulfur in steel is the main content of steelmaking process research. Phosphorus is easy to segregate at grain boundaries, causing low temperature brittleness and temper brittleness of steel. Therefore, high-grade high-quality pipeline steel and low-temperature steel have increasingly strict requirements on phosphorus content in steel, and the requirement for w(p) in steel is less than 0.010%, or even less than 0.005%. [0003] At present, in order to improve the quality of products in the production of ultra-high-power electric arc furnaces, a part of molten iron or pig iron is used as raw materials to replace scrap steel for smelting, and pig iron and molten iron (witho...

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): C21C5/52
CPCY02P10/20
Inventor 王海兵苏雄杰黄国玖张珉王鑫
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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