Effect of nozzle twisted oxygen lance on flow field and dephosphorisation rate in converter steelmaking process

During the electric arc furnace steelmaking process, the coherent jet technology was widely used to protect the kinetic energy of the supersonic oxygen jet and achieve better mixing effects. Comparing with the conventional oxygen lance, the coherent lance could increase the surface area of impaction cavity, resulting in a better stirring effect and higher reaction rate. However, there was limited research about the effect of restriction structure for the coherent lance tip on the flow field characteristic of the main oxygen jet. In this research, three kinds of restriction structures have been investigated by numerical simulation and combustion experiment at room and high ambient temperature conditions. Then an optimum restriction structure would be tested in a 75 t electrical arc furnace steelmaking process to verify its metallurgical property.

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Effect of shrouding CH4 flow rate on flow field and stirring ability of coherent jet in steelmaking process

SpringerPlus ◽

10.1186/s40064-016-3212-3 ◽

2016 ◽

Vol 5 (1) ◽

Cited By ~ 3

Author(s):

Fuhai Liu ◽

Dongbai Sun ◽

Rong Zhu ◽

Rongfang Su ◽

Xueyi Wang

Keyword(s):

Flow Field ◽

Flow Rate ◽

Steelmaking Process ◽

Coherent Jet

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Research on Using Limestone for Slagging during BOF Steelmaking Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.690-693.237 ◽

2013 ◽

Vol 690-693 ◽

pp. 237-245 ◽

Cited By ~ 6

Author(s):

Jia Feng ◽

Hong Li ◽

Chen Xiao Li ◽

Wen Chen Song ◽

Wu Nian ◽

...

Keyword(s):

Low Temperature ◽

High Speed ◽

Early Stage ◽

Converter Steelmaking ◽

Steelmaking Process ◽

Hot Metal ◽

Primary Research ◽

High Basicity ◽

Unreacted Core ◽

Unreacted Core Model

This paper introduced the primary research on the method of using limestone instead of lime for slagging during BOF steelmaking. The study showed that the heat is sufficient for limestone to completely replace lime on the condition that the ratio of hot metal to ferrous scrap is adjusted properly. According to thermodynamic calculations, the partial pressure of CO2 at the hot metal surface at the early stage of converter steelmaking is close to 0 and nearly all the CO2 can react with elements in hot metal, producing CO and reducing O2 consumption. Slag with high oxidizability, high basicity and relatively low temperature can be formed quickly by using limestone, which is advantageous for dephosphorization. Industrial tests showed the endpoint Lp rises with the proportion of lime replaced by limestone increasing. CO2 volume expands by 4000~30000 times when limestone is heated at extremely high speed in converter, resulting in the fragmentation of some parts of limestone and the increase of the contacting area of limestone and slag. The unreacted core model with surface exfoliated was introduced.

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Resulfurization behavior of pipeline steel in a converter steelmaking process

Metallurgical Research & Technology ◽

10.1051/metal/2015032 ◽

2015 ◽

Vol 112 (5) ◽

pp. 504

Author(s):

Jian-fei Xu ◽

Fu-xiang Huang ◽

Xin-hua Wang ◽

Cai-liang Jing

Keyword(s):

Pipeline Steel ◽

Converter Steelmaking ◽

Steelmaking Process

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