| 摘要 |
PROBLEM TO BE SOLVED: To provide a pickling method and pickling equipment of metal material, wherein the quantity of waste water discharged can be reduced upon pickling of metal material. SOLUTION: Provided are: (1) the pickling method of metal material, characterized in that a metal content is removed from acid used in pickling and the acid from which the metal content is removed is reused while being circulated as acid for pickling, in the pickling method of metal material comprising a pickling step of metal material and an afterward rinsing step thereof; (2) the pickling method of metal material, characterized in that impurities including chloride ion and/or sulfate ion is removed from water used for rinsing and the water from which the impurities are removed is reused while being circulated as water for pickling, in the pickling method of metal material comprising a pickling step of metal material and an afterward rinsing step thereof; and (3) the pickling method of metal material, characterized in that the metal material is steel wire coil, in the pickling method of metal material comprising a pickling step of metal material and an afterward rinsing step thereof. COPYRIGHT: (C)2011,JPO&INPIT |
