@inproceedings{8155bff38b104ee89b76c825bf24fe7e,
title = "Improving the dissolution of phosphorus from 2CaO·SiO2- 3CaO·P2O5 solid solution in aqueous solutions",
abstract = "Steelmaking slag is a potential P resource in Japan, because the P quantity in it is almost equal to that in imported phosphate ores. P2O5 is mainly concentrated in the 2CaO・SiO2-3CaO・P2O5 solid solution in slag. It has been clarified that P can be selectively leached out from C2S-C3P rather than the matrix phase of slag. To recover P from slag, its dissolution ratio from C2S-C3P should be increased. In this study, the effects of leaching agent and Na2SiO3 modification on the dissolution of the C2S-C3P solid solution and slag in aqueous solutions have been investigated. H3C6H5O7 is beneficial for P dissolution from C2S-C3P in aqueous solutions because of the formation of the CaC6H5O7 - complex, which can suppress phosphate precipitation. The P-rich phase is changed from the original C2S-C3P to C2S-C2NP with higher water solubility by Na2SiO3 modification, which facilitates P dissolution. At pH=5, 85.7% of P from the modified C2S-C3P can be dissolved in the H3C6H5O7 solution. The selective leaching of P from the CaOSiO2- Fe2O3 system slag can be achieved by Na2SiO3 modification and leaching in the H3C6H5O7 solution at pH=5. The P dissolution ratio reaches 78.4%, and only 19.7% of Fe is dissolved.",
keywords = "CS-CP solid solution, Leaching, NaSiO modification, Phosphorus recovery, Steelmaking slag",
author = "Du, {Chuan Ming} and Xu Gao and Sunjoong Kim and Shigeru Ueda and Kitamura, {Shin Ya}",
year = "2016",
month = jan,
day = "1",
doi = "10.1007/978-3-319-48769-4_97",
language = "English",
isbn = "9783319486253",
series = "Advances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts 2016",
publisher = "Springer International Publishing AG",
pages = "909--916",
editor = "Reddy, {Ramana G.} and Pinakin Chaubal and Pistorius, {P. Chris} and Uday Pal",
booktitle = "Advances in Molten Slags, Fluxes, and Salts",
address = "Switzerland",
note = "10th International Conference on Molten Slags, Fluxes and Salts, MOLTEN 2016 ; Conference date: 22-05-2016 Through 25-05-2016",
}