Journal of the Society of Powder Technology, Japan
Online ISSN : 1883-7239
Print ISSN : 0386-6157
ISSN-L : 0386-6157
Original Paper
Developments of Dechlorinate Processing Using Milling Modifying Procedure for Friedel’s Salt Form Municipal Waste Incinerator Ash
Kazuya ShimaMitsunori KondoNaomi BanMasataka KamitaniKazumasa IshidaKenichi YamazakiMasakazu TogoAtsushi NakahiraYoshihiko AkamatsuHitoshi Ohya
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2018 Volume 55 Issue 2 Pages 80-85

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Abstract

In order to facilitate to reuse on municipal waste incinerator ash, we should establish the dechlorinating technologies which includes insoluble materials like Friedel’s salt washout. In this study, we investigated the Cl ion solubility properties on our synthesized Friedel’s salt in the planetary mill experiments, and have recognized there are two stages of Cl ion soluble procedure which the rapid soluble phenomenon in early stage and the moderate soluble process in after middle. The rapid soluble phenomenon includes the crystal decreasing of Friedel’s salt but it has not been recognized significant XRD profile changes in the moderate process. It seems that some parts of released Cl ions which has migrated and been trapped into 3CaO·Al2O3 phase, will dissolve into the water in the moderate process. From the kinetics analysis, its dissolving Cl ion amounts has been affected by operated milling energy. Moreover, dissolved Cl ion amounts which derived from the milled Friedel’s salt samples has shown remarkably increasing in carbonating solvent contains HCO3 ion. It’s possible to understand that the milling procedure and the carbonization technique are much important for dechlorinating processing.

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© 2018 The Society of Powder Technology, Japan
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