Mass transfer of phosphorus in high-phosphorus hot-metal refining

Compared with the traditional limestone calcination, this paper focuses on the conditions and temperature in hot metal where limestone calcines in converter steelmaking process. Considering heat transfer, mass transfer driven by concentration gradient and mass transfer (CO2 gas flow) driven by pressure gradient, macro kinetic models are established to describe limestone decomposition rate respectively. The method of rotating cylinder sample is used in the experiment of limestone decomposition in hot metal. The image processing software Image-Pro Plus is used to analyze the cross section of limestone calcined to get the unreacted core radius of cross section of cylindrical limestone. The results show that the decomposition mechanism of limestone follows the unreacted shrinking core model, the heat conduction of lime layer is the controlling step, the heat conduction and CO2 migration through the product layer determine the rate of limestone decomposition, and the corresponding kinetic equations are established.

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Dephosphorization of Hot Metal Containing High Phosphorus Using F-free CaO–SiO2–Al2O3–Fe2O3 Slag

Transactions of the Indian Institute of Metals ◽

10.1007/s12666-021-02261-2 ◽

2021 ◽

Author(s):

Haimeng Xue ◽

Jie Li ◽

Yunjin Xia ◽

Yong Wan ◽

Liangjun Chen ◽

...

Keyword(s):

Hot Metal ◽

High Phosphorus ◽

Free Cao

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Coupled reaction kinetics of duplex steelmaking process for high phosphorus hot metal

Ironmaking & Steelmaking ◽

10.1179/1743281212y.0000000036 ◽

2013 ◽

Vol 40 (4) ◽

pp. 282-289 ◽

Cited By ~ 7

Author(s):

X Zhang ◽

B Xie ◽

H Y Li ◽

J Diao ◽

C Q Ji

Keyword(s):

Reaction Kinetics ◽

Steelmaking Process ◽

Hot Metal ◽

High Phosphorus ◽

Kinetics Of ◽

Coupled Reaction

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Process Simulation of Dephosphorization Treatment of Hot Metal with High Phosphorus Content

Tetsu-to-Hagane ◽

10.2355/tetsutohagane.100.500 ◽

2014 ◽

Vol 100 (4) ◽

pp. 500-508 ◽

Cited By ~ 12

Author(s):

Shin-ya Kitamura ◽

Farshid Pahlevani

Keyword(s):

Process Simulation ◽

Phosphorus Content ◽

Hot Metal ◽

High Phosphorus ◽

High Phosphorus Content

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Experimental Study on Desilication of the High-Phosphorus Hot Metal

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.291-294.2621 ◽

2013 ◽

Vol 291-294 ◽

pp. 2621-2624

Author(s):

Wei Xiong ◽

Jie Wang

Keyword(s):

Experimental Study ◽

Gas Flow ◽

Iron Ore ◽

Rational Utilization ◽

Hot Metal ◽

High Phosphorus ◽

Oxygen Efficiency ◽

Phosphorus Iron ◽

Western Hubei ◽

High Phosphorus Iron Ore

In order to promote the rational utilization of high-phosphorus iron ore in western Hubei of China, the effect of process parameters on desilication rate of the high-phosphorus hot metal was investigated. The results show that the desilication rate increases slightly with indistinctive effect with the increasing of desilication agent addition. The oxygen efficiency is over 50% when desilication agent addition is about 30kg/t. Desilication rate is higher when the stirring gas flow is about 0.4l/min. Strengthening stirring of bath at the beginning period can improve kinetics condition of desilication reaction.

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