Grinding of EP Dust and Its Effect on Solubility of Metal Compounds in Water

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Eiki Kasai²  Hun S. Chung¹  James M. Filio²  Yoshiaki Umetsu²  Fumio Saito² 

[1] Korea Institute of Geology, Mining and Materials;Institutefor Advanced Materials Processing, Tohoku University

关键词: Grinding;    Leaching;    EP Dust;    Vanadium;    Nickel;    Iron;    X-ray Diffraction;   

DOI  :  10.1252/jcej.27.492

来源: Maruzen Company Ltd

【 摘 要 】

References(7)Cited-By(3)Dry and wet grinding of EP dust containing mainly carbon and ammonium sulfate with small amounts of metal compounds were carried out by using three types of grinding mills. The characteristics of ground specimen and solubility of metal compounds in distilled water were investigated by XRD, EPMA, SEM, particle size distribution measurement and ICP analysis.Aggregation of fine particles occurred in dry grinding with increase in grinding time, while continuous size reduction of the ground specimen occurred in wet grinding. Dry grinding of EP dust causes structural change from crystalline metal compounds to amorphous ones. The water solubility of vanadium compound in the specimen ground under dry condition increases with an increase in grinding time, while that of nickel and iron compounds are almost independent of grinding time. The maximum concentrations of vanadium are about five to six times higher than those for the original unground specimen. Wet grinding does not contribute to the improvement in solubility of metal compounds.

【 授权许可】

Unknown