Behavior of phosphorus transfer from CaO-SiO2-FetO-P2O5slags to 2CaO·SiO2 particles

doi:10.11835/j.issn.1000-582X.2015.05.012

Home > Archive>Volume 38, Issue 5, 2015 >78-82. DOI:10.11835/j.issn.1000-582X.2015.05.012

Behavior of phosphorus transfer from CaO-SiO2-FetO-P2O5slags to 2CaO·SiO2 particles
DOI:
                        10.11835/j.issn.1000-582X.2015.05.012
                    
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                        DOU XiaofeiDOU Xiaofei
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, P.R.China
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ZHU MingmeiZHU Mingmei
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, P.R.China; Chongqing Iron and Steel Group Corporation, Chongqing 400080, P.R.China
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LIN TianchengLIN Tiancheng
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, P.R.China
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WANG YuWANG Yu
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, P.R.China
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XIE BingXIE Bing
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, P.R.China
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ZHU BinZHU Bin
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, P.R.China; Chongqing Iron and Steel Group Corporation, Chongqing 400080, P.R.China
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ZHOU HongZHOU Hong
Chongqing Iron and Steel Group Corporation, Chongqing 400080, P.R.China
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Fund Project:Supported by The Science Special Foundation for Postdoctorate Research Project of Chongqing(No. XM201326) and China Postdoctoral Foundation(No. 2013M542259).

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Abstract:

In this paper, the behavior of phosphorus transfer from CaO-SiO2-FetO-P2O5 slags to 2CaO·SiO2 (C2S) particles is investigated. The reaction between C2S particles and the slag saturated C2S is conducted at 1 500 ℃ in laboratory. Ingredients at different positions on the interface between C2S particles and the slag are observed and analyzed by SEM/EDS and the phosphorous transfer behavior is discussed. The result shows that C2S particles react with the particles surrounded molten slag in the solid-liquid two phase zone and forms the n·2CaO·SiO2-3CaO·P2O5 (nC2S-C3P) solid solution. With the reaction time progressing, the thickness of nC2S-C3P solid solution layer increases. In the direction to the inside of C2S particles, the phosphorus content in the nC2S-C3P layer decreases. Knowing the behavior of phosphorus transfer from CaO-SiO2-FetO-P2O5 slags to C2S phase is helpful to study the formation mechanism of nC2S-C3P in the slags.

Key words:2CaO·SiO2 particles; CaO-SiO2-FetO-P2O5 slags; hot metal dephosphorization; 2CaO·SiO2-3CaO·P2O5 solid solution; behavior of phosphorus transfer

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豆晓飞,祝明妹,林天成,王雨,谢兵,朱斌,周宏.磷在CaO-SiO2-FetO-P2O5与2CaO·SiO2颗粒界面间的传质行为[J].重庆大学学报,2015,38(5):78~82

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Received:May 20,2015
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Online: November 04,2015
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