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1. WO2001055468 - METHOD AND APPARATUS FOR REMOVING BOTTOM DROSS IN HOT DIP GALVANIZING BATH

Publication Number WO/2001/055468
Publication Date 02.08.2001
International Application No. PCT/JP2001/000538
International Filing Date 26.01.2001
Chapter 2 Demand Filed 27.08.2001
IPC
C23C 2/00 2006.1
CCHEMISTRY; METALLURGY
23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
2Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
CPC
C23C 2/003
CCHEMISTRY; METALLURGY
23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
2Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
003Apparatus, e.g. crucibles, heating devices
Y02P 10/20
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
10Technologies related to metal processing
20Recycling
Applicants
  • KABUSHIKI KAISHA GALVA KOGYO MIHARA KOJYO [JP]/[JP] (AE, AG, AL, AM, AT, AU, AZ, BA, BB, BE, BF, BG, BJ, BR, BY, BZ, CA, CF, CG, CH, CI, CM, CN, CR, CU, CY, CZ, DE, DK, DM, DZ, EE, ES, FI, FR, GA, GB, GD, GE, GH, GM, GN, GR, GW, HR, HU, ID, IE, IL, IN, IS, IT, JP, KE, KG, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MC, MD, MG, MK, ML, MN, MR, MW, MX, MZ, NE, NL, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, SN, SZ, TD, TG, TJ, TM, TR, TT, TZ, UA, UG, UZ, VN, YU, ZA, ZW)
  • SHINOHARA, Kiyoko [JP]/[JP]
  • HANDA, Kazuo [JP]/[JP] (UsOnly)
  • MURAKAMI, Yoshihiro [JP]/[JP] (UsOnly)
  • KOBAYASHI, Hiromi [JP]/[JP] (UsOnly)
Inventors
  • SHINOHARA, Kiyoko
  • HANDA, Kazuo
  • MURAKAMI, Yoshihiro
  • KOBAYASHI, Hiromi
Agents
  • SENMYO, Kenji
Priority Data
2000-1655426.01.2000JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) METHOD AND APPARATUS FOR REMOVING BOTTOM DROSS IN HOT DIP GALVANIZING BATH
(FR) PROCEDE ET APPAREIL DE SUPPRESSION DE L'ECUME DE FOND DANS UN BAIN DE GALVANISATION PAR IMMERSION A CHAUD
Abstract
(EN) A method for removing a bottom dross in a hot dip galvanizing bath, which comprises providing a cylindrical device having openings in its top portion and bottom portion, a means for blowing bubbles in in its bottom portion and an ingot containing metallic aluminum in its middle portion, immersing the cylindrical device in the hot dip galvanizing bath in a transferable manner, feeding bubbles by the above means and blowing the bubbles toward the bottom dross, to thereby float the ingot up in the device together with bubbles, reacting the bottom dross floated up with the ingot containing metallic aluminum, to thereby convert it into a top dross and further float it up, and removing the top dross. The method can be employed for removing a bottom dross deposited in the bottom portion of a hot dip galvanizing bath with good efficiency, while keeping the composition of the bath almost constant.
(FR) L'invention se rapporte à un procédé de suppression de l'écume de fond dans un bain de galvanisation par immersion à chaud, qui consiste à utiliser un dispositif cylindrique ayant des ouvertures au niveau de sa partie supérieure et de sa partie inférieure, un organe conçu pour produire des bulles dans sa partie inférieure et une lingotière contenant de l'aluminium métallique dans sa partie intermédiaire; à immerger le dispositif cylindrique dans le bain de galvanisation par immersion à chaud; à produire des bulles au moyen de l'organe ci-dessus mentionné et à diriger les bulles vers l'écume de fond de manière à faire flotter la lingotière avec les bulles, dans le dispositif; à faire réagir l'écume de fond qui flotte avec la lingotière contenant l'aluminium métallique de manière à la transformer en une écume de niveau supérieur et à maintenir flottante cette écume supérieure, puis à la retirer. Ce procédé peut permettre de retirer efficacement une écume de fond déposée en partie inférieure d'un bain de galvanisation par immersion à chaud, tout en maintenant la composition du bain sensiblement constante.
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