Dephosphorization behavior of reduced iron and the properties of high-P-containing slag

Reduced iron (1.74% P) is produced from oolitic hematite ore by coal-based reduction and magnetic separation. To realize the comprehensive utilization of Fe and P, the dephosphorization behavior of the reduced iron is investigated in the presence of CaO–SiO2–FeO–Al2O3 slag. The P content of the fina...

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Autores principales:	Liu Liwei, Li Guofeng, Li Yanfeng, Zhao Libing
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	high-p-containing reduced iron dephosphorization slag phosphate fertilizer Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248
Acceso en línea:	https://doaj.org/article/20fc7b63e6c942a3aca4a7f917b51d5c
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spelling	oai:doaj.org-article:20fc7b63e6c942a3aca4a7f917b51d5c2021-12-05T14:10:50ZDephosphorization behavior of reduced iron and the properties of high-P-containing slag2191-032410.1515/htmp-2021-0033https://doaj.org/article/20fc7b63e6c942a3aca4a7f917b51d5c2021-10-01T00:00:00Zhttps://doi.org/10.1515/htmp-2021-0033https://doaj.org/toc/2191-0324Reduced iron (1.74% P) is produced from oolitic hematite ore by coal-based reduction and magnetic separation. To realize the comprehensive utilization of Fe and P, the dephosphorization behavior of the reduced iron is investigated in the presence of CaO–SiO2–FeO–Al2O3 slag. The P content of the final iron and the P2O5 content of the high-P-containing slag are determined, and the phase composition and P2O5 solubility of the slag are analyzed. The P content can be decreased to 0.2% when the initial slag has a basicity of 3.5 and contains 55% FeO and 6% Al2O3. The phases of the high-P-containing slag are mainly Ca2Al2SiO7, Ca2SiO4, Ca5(PO4)2SiO4, and FeO, and P exists in the form of Ca5(PO4)2SiO4. Excessively high basicity or low content of FeO and Al2O3 results in free CaO, which affects the dephosphorization results. The change rule of the intensity of the Ca5(PO4)2SiO4 diffraction peak agrees well with the dephosphorization indexes, which further verify the accuracy of the dephosphorization experiments. Moreover, the P2O5 content and P2O5 solubility of the high-P-containing slag reached as high as 14.41 and 94.54%, respectively, indicating that it can be used as a phosphate fertilizer.Liu LiweiLi GuofengLi YanfengZhao LibingDe Gruyterarticlehigh-p-containing reduced irondephosphorizationslagphosphate fertilizerTechnologyTChemical technologyTP1-1185Chemicals: Manufacture, use, etc.TP200-248ENHigh Temperature Materials and Processes, Vol 40, Iss 1, Pp 337-344 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	high-p-containing reduced iron dephosphorization slag phosphate fertilizer Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248
spellingShingle	high-p-containing reduced iron dephosphorization slag phosphate fertilizer Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248 Liu Liwei Li Guofeng Li Yanfeng Zhao Libing Dephosphorization behavior of reduced iron and the properties of high-P-containing slag
description	Reduced iron (1.74% P) is produced from oolitic hematite ore by coal-based reduction and magnetic separation. To realize the comprehensive utilization of Fe and P, the dephosphorization behavior of the reduced iron is investigated in the presence of CaO–SiO2–FeO–Al2O3 slag. The P content of the final iron and the P2O5 content of the high-P-containing slag are determined, and the phase composition and P2O5 solubility of the slag are analyzed. The P content can be decreased to 0.2% when the initial slag has a basicity of 3.5 and contains 55% FeO and 6% Al2O3. The phases of the high-P-containing slag are mainly Ca2Al2SiO7, Ca2SiO4, Ca5(PO4)2SiO4, and FeO, and P exists in the form of Ca5(PO4)2SiO4. Excessively high basicity or low content of FeO and Al2O3 results in free CaO, which affects the dephosphorization results. The change rule of the intensity of the Ca5(PO4)2SiO4 diffraction peak agrees well with the dephosphorization indexes, which further verify the accuracy of the dephosphorization experiments. Moreover, the P2O5 content and P2O5 solubility of the high-P-containing slag reached as high as 14.41 and 94.54%, respectively, indicating that it can be used as a phosphate fertilizer.
format	article
author	Liu Liwei Li Guofeng Li Yanfeng Zhao Libing
author_facet	Liu Liwei Li Guofeng Li Yanfeng Zhao Libing
author_sort	Liu Liwei
title	Dephosphorization behavior of reduced iron and the properties of high-P-containing slag
title_short	Dephosphorization behavior of reduced iron and the properties of high-P-containing slag
title_full	Dephosphorization behavior of reduced iron and the properties of high-P-containing slag
title_fullStr	Dephosphorization behavior of reduced iron and the properties of high-P-containing slag
title_full_unstemmed	Dephosphorization behavior of reduced iron and the properties of high-P-containing slag
title_sort	dephosphorization behavior of reduced iron and the properties of high-p-containing slag
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/20fc7b63e6c942a3aca4a7f917b51d5c
work_keys_str_mv	AT liuliwei dephosphorizationbehaviorofreducedironandthepropertiesofhighpcontainingslag AT liguofeng dephosphorizationbehaviorofreducedironandthepropertiesofhighpcontainingslag AT liyanfeng dephosphorizationbehaviorofreducedironandthepropertiesofhighpcontainingslag AT zhaolibing dephosphorizationbehaviorofreducedironandthepropertiesofhighpcontainingslag
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Dephosphorization behavior of reduced iron and the properties of high-P-containing slag

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