POWDERY PARTICLE MATERIAL TREATMENT SYSTEM, AND POWDERY PARTICLE MATERIAL TREATMENT METHOD

PROBLEM TO BE SOLVED: To provide a powdery particle material treatment system capable of efficiently removing an obstruction substance such as a water soluble component or heavy metals from a powdery particle material while suppressing the foaming of washing wastewater and simplifying equipment to reduce the amount of washing water. SOLUTION: The powdery particle material treatment system is equipped with a wet sorting means 2 for sorting the powder particle material into a fine particle material and a medium particle material, a fine particle material separating means 4 for subjecting the fine particle material and washing wastewater, which are discharged from the wet sorting means 2, to solid-liquid separation treatment, a first circulating route 3 for returning the washing wastewater subjected to the solid-liquid treatment by the fine particle material separating means 4 to the wet sorting means 2, a second circulating route 7 for returning the washing wastewater, which is discharged from a rewashing means 5 for rewashing the medium particle material sorted by the wet sorting means 2, to the rewashing means 5, a novel water supplying route 8 for supplying novel water to the rewashing means 5 and a washing wastewater supplying route 9 for supplying a part of the washing wastewater discharged from the rewashing means 5 to the first circulating route 3 as washing water and the fine particle material separating means 4 is constituted of a filtering type solid-liquid separation means. COPYRIGHT: (C)2011,JPO&INPIT