EP0368035B1 - Appareillage d'épuration en discontinu de bains de sels - Google Patents

Appareillage d'épuration en discontinu de bains de sels Download PDF

Info

Publication number
EP0368035B1
EP0368035B1 EP89119225A EP89119225A EP0368035B1 EP 0368035 B1 EP0368035 B1 EP 0368035B1 EP 89119225 A EP89119225 A EP 89119225A EP 89119225 A EP89119225 A EP 89119225A EP 0368035 B1 EP0368035 B1 EP 0368035B1
Authority
EP
European Patent Office
Prior art keywords
desludging
discontinuous
salt
conveyor pipe
salt baths
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89119225A
Other languages
German (de)
English (en)
Other versions
EP0368035A1 (fr
Inventor
Georg Dipl.-Ing. Wahl
Klaus Dipl.-Ing. Breitwieser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Houghton Durferrit degussa-Huels AG GmbH
Original Assignee
Degussa GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Degussa GmbH filed Critical Degussa GmbH
Priority to AT89119225T priority Critical patent/ATE89326T1/de
Publication of EP0368035A1 publication Critical patent/EP0368035A1/fr
Application granted granted Critical
Publication of EP0368035B1 publication Critical patent/EP0368035B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C21D1/44—Methods of heating in heat-treatment baths
    • C21D1/46—Salt baths
    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23C—COATING 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/18—Solid state diffusion of only metal elements or silicon into metallic material surfaces using liquids, e.g. salt baths, liquid suspensions
    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23C—COATING 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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions

Definitions

  • the invention relates to a device for discontinuous desludging of the salt baths serving the metal treatment, consisting of a delivery pipe with an intake port, an air supply line and a filter unit which is completely or partially immersed in the salt bath.
  • the quality of the treated components is significantly influenced by the sludge content and the cleanliness of the molten salt.
  • the sludge formation can be attributed to various causes, such as grinding dust brought in with the material to be treated, processing chips, rust and scale, as well as contamination from charging racks. Iron contamination in the bath also influences the formation of the connection layer of parts nitrocarburized in the salt bath.
  • a device for continuous desludging of salt baths which consists of a delivery pipe with an intake, an air supply and a filter unit, which is completely or partially immersed in the salt bath.
  • This device has the disadvantage that part of the bath is lost for use. On the other hand, it is not suitable for discontinuous operation, since the time required for a salt bath throughput is relatively large.
  • a bottom plate is left open the delivery pipe opening, which is provided in the direction of the salt bath crucible floor with spacers, and that the suction nozzle is arranged in the delivery pipe and can move telescopically down and up in the delivery pipe .
  • the device according to the invention has the advantage that the narrow gap width from the base plate to the crucible base ensures a high suction speed of the molten salt and good turbulence underneath the base plate, whereby the soil sludge is also captured. Furthermore, it is ensured that the salt melt to be filtered is conveyed from the lowest point of the crucible through the conveyor tube into the filter unit by the movable suction nozzle.
  • the high delivery rate of the device enables multiple volume changes of the molten salt during the desludging period of about 20 to 30 minutes.
  • Wire fabrics with mesh sizes of 0.05 to 0.5 mm or glass wool are preferably used as filter materials.
  • the figure schematically shows an exemplary embodiment of the device according to the invention in longitudinal section.
  • the device consists of a conveyor pipe (2), in which there is an air supply line (1) and at the lower end a telescopically displaceable suction nozzle (5). Furthermore, a bottom plate (7) is attached to the lower end of the conveyor tube (2), which leaves the suction opening of the conveyor tube (2) free and is provided with spacers (4) against the crucible bottom.
  • the filter unit (3) is attached in the upper area of the delivery pipe (2). In this area, the delivery pipe (2) is provided with slots (6).
  • the device o C good pre-heated at about 350 in a preheating furnace and absolutely dry slowly in the salt bath retracted.
  • the desludging device should stand centrally on the crucible bottom. Then the air supply is connected to the air supply line (1) and turned on until the liquid salt runs continuously through the slots (6) of the delivery pipe (2) into the filter unit (3). Depending on the degree of contamination of the bath, the filter clogs up during the desludging process. This leads to an increase in the salt level in the filter unit. In general, the desludging process ends after 30 minutes if no further rise in the bath level is observed.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Seasonings (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (1)

  1. Dispositif pour le débourbage en continu de bains de sel servant au traitement de métaux, composé d'un tube d'extraction avec des ajutages d'aspiration, une conduite d'amenée d'air et un dispositif de filtrage plongeant complètement ou partiellement dans le bain de sel,
       caractérisé en ce qu'à l'extrémité inférieure du tube d'évacuation (2) est appliquée une plaque de fond (7) laissant libre l'ouverture du tube d'extraction, plaque qui est équipée d'arrêts d'espacement en direction du fond du creuset de bain de sel, et
    - en ce que l'ajutage d'aspiration (5) est disposé dans le tube d'extraction (2) et peut se déplacer dans le tube d'aspiration (2) vers le haut et vers le bas de façon télescopique.
EP89119225A 1988-10-29 1989-10-17 Appareillage d'épuration en discontinu de bains de sels Expired - Lifetime EP0368035B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89119225T ATE89326T1 (de) 1988-10-29 1989-10-17 Vorrichtung zur diskontinuierlichen entschlammung von salzbaedern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3836939 1988-10-29
DE3836939A DE3836939C1 (fr) 1988-10-29 1988-10-29

Publications (2)

Publication Number Publication Date
EP0368035A1 EP0368035A1 (fr) 1990-05-16
EP0368035B1 true EP0368035B1 (fr) 1993-05-12

Family

ID=6366189

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89119225A Expired - Lifetime EP0368035B1 (fr) 1988-10-29 1989-10-17 Appareillage d'épuration en discontinu de bains de sels

Country Status (5)

Country Link
EP (1) EP0368035B1 (fr)
JP (1) JP2904825B2 (fr)
AT (1) ATE89326T1 (fr)
DE (2) DE3836939C1 (fr)
ES (1) ES2040436T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4400755A1 (de) * 1993-01-26 1994-07-28 Leybold Durferrit Gmbh Filtereinheit und Vorrichtung zum Entschlammen von Salzbädern
ATE186754T1 (de) * 1994-01-13 1999-12-15 Houghton Durferrit Gmbh Filtereinheit und vorrichtung zum entschlammen von salzbädern
KR101144400B1 (ko) * 2011-06-21 2012-05-10 현대위아 주식회사 열처리 염욕용 솔트 운반 장치
CN104671060A (zh) * 2015-02-11 2015-06-03 河南东风新研材科技有限公司 一种砂轮托架
CN106744238A (zh) * 2015-11-25 2017-05-31 桃江县扬洋机电科技有限公司 一种细长零件盐浴表面处理吊具

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1198842B (de) * 1958-06-03 1965-08-19 Degussa Verfahren und Vorrichtung zum Entschlammen von Warmbaedern in der Haertetechnik
DE2731167C3 (de) * 1977-07-09 1980-12-04 Degussa Ag, 6000 Frankfurt Verwendung von anorganischen Faserwerkstoffen zur Reinigung von Salzbädern und Vorrichtung zur Verwendung dieser Faserwerkstoffe
DE2911222A1 (de) * 1979-03-22 1980-11-06 Degussa Verfahren und vorrichtung zum entschlammen von salzbaedern
DE2923028A1 (de) * 1979-06-07 1980-12-18 Volkswagenwerk Ag Verfahren und vorrichtung zum entschlammen von salzschmelzen, insbesondere von nitrierbaedern
DE3733721C1 (de) * 1987-10-06 1988-04-21 Degussa Vorrichtung zur kontinuierlichen Entschlammung von Salzbaedern

Also Published As

Publication number Publication date
JPH02170912A (ja) 1990-07-02
ES2040436T3 (es) 1993-10-16
DE58904341D1 (de) 1993-06-17
ATE89326T1 (de) 1993-05-15
DE3836939C1 (fr) 1989-06-15
JP2904825B2 (ja) 1999-06-14
EP0368035A1 (fr) 1990-05-16

Similar Documents

Publication Publication Date Title
DE3127440C2 (fr)
DE2132746C3 (de) Verfahren und Vorrichtung zum Trocknen oder Entfetten von Werkstücken o.dgl.
EP0368035B1 (fr) Appareillage d'épuration en discontinu de bains de sels
EP0289875A1 (fr) Méthode et dispositif pour le nettoyage des pièces à usiner
CH618003A5 (fr)
DE2713730C2 (de) Vorrichtung zum Reinigen von verschmutzten Schnitzeln
DE19504415B4 (de) Warmhalteofen für eine Metallschmelze und Verfahren zur Aufnahme von Metallschmelze in einem derartigen Ofen
EP0036952A1 (fr) Equipement de lavage et de rinçage à haute pression travaillant en continu
DD158256A5 (de) Verfahren und vorrichtung zum entfernen einer auf einem bad befindlichen fluidschicht
EP0235654B1 (fr) Procédé et appareil pour épurer du soufre impur
DE3687513T2 (de) Filterapparat.
DE4209297C2 (de) Behandlungseinrichtung für den Reinraumbereich
DE2850148C3 (de) Verfahren und Vorrichtung zum Reinigen von Kokslöschwasser oder anderer durch Feststoffe mit breitem Körnungsspektrum verunreinigter Wässer
DE4027879A1 (de) Abscheidevorrichtung fuer verunreinigtes wasser
DE2627266A1 (de) Vorrichtung zum behandeln des filterkuchens bei einem bewegten filter
AT407389B (de) Verfahren zum abzug von schwimmschlamm von wasseroberflächen
DE3320480C2 (de) Glasschmelzofen
DE3734200A1 (de) Verfahren und vorrichtung zum entfernen anhaftenden schmiermittels von werkstuecken
DE2206475C3 (de) Verfahren und Vorrichtung zum Raffinieren einer Schmelze von festen Beimengungen
DE3423040A1 (de) Metallreinigungsanlage
DE8400618U1 (de) Reinigungsgeraet fuer wasser durch aerobe kulturen, die auf einer granularen unterlage fixiert sind
DE564595C (de) Verfahren und Vorrichtung zum Gluehen von Metallgegenstaenden im Salzbad
DE2627797A1 (de) Verfahren und anlage zur reinigung von rauchgasen
DE1610894A1 (de) Verfahren und Einrichtung zum Klaeren eines zur chemischen Reinigung dienenden Loesungsmittels
DE140991C (fr)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19891017

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17Q First examination report despatched

Effective date: 19920603

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

REF Corresponds to:

Ref document number: 89326

Country of ref document: AT

Date of ref document: 19930515

Kind code of ref document: T

ITF It: translation for a ep patent filed
ET Fr: translation filed
REF Corresponds to:

Ref document number: 58904341

Country of ref document: DE

Date of ref document: 19930617

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19930621

REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3008451

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2040436

Country of ref document: ES

Kind code of ref document: T3

EPTA Lu: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 89119225.4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19951001

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19961017

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Free format text: DEGUSSA AKTIENGESELLSCHAFT TRANSFER- DEGUSSA-HUELS AKTIENGESELLSCHAFT

Ref country code: CH

Ref legal event code: PUE

Owner name: DEGUSSA-HUELS AKTIENGESELLSCHAFT TRANSFER- HOUGHTO

NLS Nl: assignments of ep-patents

Owner name: HOUGHTON DURFERRIT GMBH;DEGUSSA-HUELS AKTIENGESELL

BECA Be: change of holder's address

Free format text: 19990601 *HOUGHTON DURFERRIT G.M.B.H.:INDUSTRIESTRASSE 3, 68169 MANNHEIM

BECH Be: change of holder

Free format text: 19990601 *HOUGHTON DURFERRIT G.M.B.H.

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20000921

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20001002

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 20001023

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20010914

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20010925

Year of fee payment: 13

Ref country code: NL

Payment date: 20010925

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20011011

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011018

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20011024

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011031

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011031

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011031

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

EUG Se: european patent has lapsed

Ref document number: 89119225.4

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021017

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021017

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021018

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021031

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

BERE Be: lapsed

Owner name: *HOUGHTON DURFERRIT G.M.B.H.

Effective date: 20021031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030501

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20021017

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20030501

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20031112

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051017

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20081022

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20081014

Year of fee payment: 20

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT