DK160263B - PROCEDURE FOR COATING IN AN OVEN HEATED STRING MATERIAL OF IRON METAL WITH TREATMENT OF THE STRING MATERIAL IN STANDING, REDUCING GASA MOSPHERE AND APPLICATION FOR IMPLEMENTATION OF PROCEDURE - Google Patents
PROCEDURE FOR COATING IN AN OVEN HEATED STRING MATERIAL OF IRON METAL WITH TREATMENT OF THE STRING MATERIAL IN STANDING, REDUCING GASA MOSPHERE AND APPLICATION FOR IMPLEMENTATION OF PROCEDURE Download PDFInfo
- Publication number
- DK160263B DK160263B DK355581A DK355581A DK160263B DK 160263 B DK160263 B DK 160263B DK 355581 A DK355581 A DK 355581A DK 355581 A DK355581 A DK 355581A DK 160263 B DK160263 B DK 160263B
- Authority
- DK
- Denmark
- Prior art keywords
- protective cap
- string
- gas
- strand
- cap
- Prior art date
Links
- 239000000463 material Substances 0.000 title claims description 36
- 239000011248 coating agent Substances 0.000 title claims description 19
- 238000000576 coating method Methods 0.000 title claims description 19
- 238000000034 method Methods 0.000 title claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title description 3
- 230000001681 protective effect Effects 0.000 claims description 44
- 239000007789 gas Substances 0.000 claims description 43
- 239000000203 mixture Substances 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 4
- 238000009792 diffusion process Methods 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 239000011819 refractory material Substances 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 229910001297 Zn alloy Inorganic materials 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000011363 dried mixture Substances 0.000 claims 1
- -1 ferrous metals Chemical class 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 7
- 229910052725 zinc Inorganic materials 0.000 description 7
- 239000011701 zinc Substances 0.000 description 7
- 238000007654 immersion Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000007605 air drying Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 230000004941 influx Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011226 reinforced ceramic Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
- C23C2/004—Snouts
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Coating With Molten Metal (AREA)
Description
55
DK 160263 BDK 160263 B
Opfindelsen vedrører en fremgangsmåde til overtrækning af i en ovn opvarmet strengmateriale af jernholdige metaller med et metallisk overtræksmedie, hvorved strengen bevæges i længderetning gennem en beskyttelseshætte, som har en strengafgangs-10 ende, som dykker ned i et bad af det metalliske overtræksmedie, og som omslutter en brøkdel af mediets overflade, hvorved beskyttelseshætten er fyldt med en reducerende gas, og hvorved strengen før indmundingen i beskyttelseshætten gennemløber en strengovn og en dertil tilsluttet udgangskanal, 15 og et apparat til gennemførelse af en sådan fremgangsmåde med en strengopvarmningsovn, med en til denne tilgrænsende strengudgangskanal, som ender i en beskyttelseshætte, hvis længst borte fra strengudgangskanalen liggende strengafgangsende dykker ned i et bad af smeltet, metallisk overtræksmedie, og med 20 indretninger til fremføring af strengen fra ovnen gennem strengudgangskanalen gennem beskyttelseshætten og badet.BACKGROUND OF THE INVENTION The present invention relates to a method of coating ferrous metal heated material in a furnace with a metallic coating medium whereby the string is moved longitudinally through a protective cap having a strand outlet end plunging into a bath of the metallic coating medium. encloses a fraction of the surface of the medium, whereby the protective cap is filled with a reducing gas, whereby the string passes through a string furnace and an output channel connected thereto prior to the opening of the protective cap, and an apparatus for carrying out such a method with a string heating furnace, with a adjoining strand exit channel ending in a protective cap whose strand outlet end furthest away from the strand exit duct is immersed in a bath of molten metallic coating medium, and having 20 devices for passing the strand from the furnace through the strand exit channel through the protective cap and bath.
En sådan fremgangsmåde og et sådant apparat kendes allerede fra GB patentskrift nr. 1 436 213. Ved den kendte varmdyp-25 ningsmetode udmunder en fra en glødeovn udført materialestreng af jernholdige metaller først i en ovnafgangskanal. Materialestrengen føres gennem denne kanal ind i en til kanalen tilsluttet beskyttelseshætte. Denne beskyttelseshætte er med sin bort fra afgangskanalen vendende ende dykket ned i et væskebad 30 af en smeltet aluminium/zinklegering. Materialestrengen føres gennem denne beskyttelseshætte og dykker gennem den i væskebadet delvis neddykkende ende, som udgør strengafgangsenden, ned i væskebadet. Materialestrengen dukker derefter, overtrukket med et zink/aluminiumlag, igen op af væskebadet og tilføres 35 til en videre behandling. Ovnafgangskanalen er opdelt i et tilSuch a method and apparatus are already known from GB patent specification 1 436 213. In the known hot dipping method, a material string made of a glowing furnace first emits in an furnace outlet channel. The material strand is passed through this channel into a protective cap connected to the channel. This protective cap, with its end facing away from the outlet channel, is immersed in a liquid bath 30 of a molten aluminum / zinc alloy. The material strand is passed through this protective cap and dives into the liquid bath, which is partially submerged in the liquid bath, which constitutes the strand outlet end. The material strand then reappears, coated with a zinc / aluminum layer, again from the liquid bath and added to a further treatment. The furnace outlet duct is divided into one more
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2 glødeovnen tilsluttet område, i hvilket glødeovnens temperatur opretholdes, og i et dertil tilsluttet område, i hvilket strengmaterialet afkøles til en temperatur, der ikke ligger over væskebadets temperatur. Gennem tilgangskanaler, som er 5 ført gennem beskyttelseshættens vægge i nærheden af væskebadets overflade og i retning mod denne, blæses til mindst 340°C opvarmet, reducerende gas ind i beskyttelseshætten. Den indblæste gas stryger først over væskebadets overflade og strømmer så mod strengmaterialets løberetning langs dette ind i 10 strengafgangskanalen. Derved opnås, at strengmaterialet, som dykker ned i væskebadet, er fri for oxygen og vanddamp. Oxygen og vanddamp forårsager en oxydering af væskebadet, som igen forårsager nålehuller og ikke med overtræk forsynede pletter.2, the incinerator is connected to a region in which the temperature of the incinerator is maintained and in a connected area in which the strand material is cooled to a temperature not above the temperature of the liquid bath. Through inlet ducts which are passed through the walls of the protective cap near the surface of the liquid bath and towards it, at least 340 ° C heated reducing gas is blown into the protective cap. The blown gas first floats across the surface of the liquid bath and then flows towards the flow direction of the strand material along it into the strand discharge channel. Thereby, the strand material which dives into the liquid bath is obtained free of oxygen and water vapor. Oxygen and water vapor cause an oxidation of the liquid bath, which in turn causes needle holes and non-coated patches.
15 Ved den beskrevne, kendte fremgangsmåde, som udføres med det ligeledes beskrevne apparat, viser det sig dog, at på trods af fortrængningen af oxygen og vanddamp i beskyttelseshætten optræder der alligevel små nålehuller i strengmaterialets overtræk. Sådanne nålehuller fører især ved efterfølgende lakering 20 af strengmaterialet til diskontinuiteter i laklaget under den efterfølgende tørring. Det viser sig, at disse nålehuller i strengmaterialets overtræk har deres årsag i nedslag af fordampet zink på strengmaterialet før dettes neddykning i væskebadet. Den fordampede zink kommer med strømmen af reducerende 25 gasatmosfære på materialestrengen før dennes neddykning i væskebadet .15 However, in the described known method, which is carried out with the apparatus also described, it turns out that despite the displacement of oxygen and water vapor in the protective cap, small needle holes nevertheless appear in the coating material of the strand material. Such needle holes, in particular upon subsequent lacquering 20 of the strand material, lead to discontinuities in the lacquer layer during the subsequent drying. It turns out that these needle holes in the strand material have their cause in the impact of evaporated zinc on the strand material before its immersion in the liquid bath. The evaporated zinc comes with the flow of reducing gas atmosphere on the material strand before its immersion in the liquid bath.
Opfindelsens opgave består i at angive en fremgangsmåde til overtrækning af i en ovn opvarmet strengmateriale af jernhol-30 digt metal i et væskebad og et apparat til gennemførelse af fremgangsmåden, ved hvilken der ikke optræder nogen nålehuller i overtrækket især forårsaget af nedslag af fordampet zink på strengmaterialet før dettes neddykning i væskebadet.SUMMARY OF THE INVENTION The object of the invention is to provide a method for coating iron-containing metal-heated strand material in a liquid bath and an apparatus for carrying out the method, in which no needle holes occur in the coating, in particular caused by the evaporation of evaporated zinc on the the strand material prior to its immersion in the liquid bath.
35 Denne opgave løses ved en fremgangsmåde af den i indledningen35 This task is solved by a method of the one in the introduction
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3 beskrevne slags med følgende kendetegn: a) opretholdelse af den reducerende, i det væsentlige i det mindste i strengafgangens område stillestående gasatmosfæ- 5 re i beskyttelseshætten; b) indledning af den reducerende gas i den i strømmen før beskyttelseshætten anbragte afgangskanal, gennem hvilken strengmaterialet løber på sin vej til beskyttelseshætten, 10 på en sådan måde, at gassen diffunderer ind i beskyttel seshætten, og c) begrænsning af diffusionsmængden og hastigheden fra afgangskanalen ind i beskyttelseshætten til værdier, som er 15 nødvendige for at holde mængden og sammensætningen af gas sen i beskyttelseshætten i det væsentlige konstant.3 described with the following characteristics: a) maintaining the reducing gas atmosphere, at least in the region of the outlet, in the protective cap; b) introducing the reducing gas into the outlet duct placed in the stream prior to the protective cap through which the strand material travels on its way to the protective cap 10 in such a way that the gas diffuses into the protective cap, and c) limiting the amount of diffusion and velocity from the outlet duct into the protective cap to values necessary to keep the amount and composition of gas late in the protective cap substantially constant.
Ved apparatet af den i indledningen beskrevne slags til gennemførelse af denne fremgangsmåde løses den til grund for op- 20 findelsen liggende opgave ved følgende kendetegn: a) indretninger til indføring af en reducerende gas i strengafgangskanalen til opretholdelse af en fyldt tilstand i denne, og 25 b) drøvleindretninger, hvilke i det væsentlige er anbragt i overgangen mellem strengafgangskanalen og beskyttelseshætten til styring af den ind i beskyttelseshætten indtrædende gasmængde.In the apparatus of the kind described in the preamble to carry out this method, the object of the invention is solved by the following characteristics: a) devices for introducing a reducing gas into the discharge channel to maintain a filled state therein; and (b) throttle devices which are substantially disposed in the transition between the discharge channel and the protective cap to control the amount of gas entering the protective cap.
3030
Nedslaget af fordampet zink på strengmaterialet før dettes neddykning i væskebadet forhindres ved en forholdsvis enkel, men meget virkningsfuld forholdsregel, som består i, at holde den reducerende gasatmosfære i nærheden af beskyttelseshætte- 35 udgangen i det væsentlige i ro og konstant i sin sammensæt-The impact of evaporated zinc on the strand material prior to its immersion in the liquid bath is prevented by a relatively simple but very effective precaution which consists in keeping the reducing gas atmosphere near the protective cap outlet substantially at rest and constant in its composition.
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4 ning. Dette opnås ved indføring af den reducerende gas i den før beskyttelseshætten anbragte afgangskanal, hvorigennem gassen kun ved diffusion kommer ind i beskyttelseshætten, og ved begrænsning af diffusionsmængde og -hastighed. Forholdsreglen 5 forringer zinkindholdet i den reducerende gasatmosfære i nærheden af beskyttelseshætteafgangen væsentligt, og forbedrer dermed overtrækningen af strengmaterialet. Zinkpartikler, som kommer i nærheden af beskyttelseshætten, træffer på en rolig atmosfære og blæses ikke på metalstrengen.4 ning. This is achieved by introducing the reducing gas into the outlet duct placed before the protective cap, through which the gas enters the protective cap only by diffusion, and by limiting the amount of diffusion and velocity. Precaution 5 significantly degrades the zinc content of the reducing gas atmosphere in the vicinity of the protective cap outlet, thereby improving the coating of the strand material. Zinc particles, which come close to the protective cap, strike in a calm atmosphere and do not blow on the metal strand.
1010
Fordelen ved opfindelsen ligger i et fejlfrit metallisk overtræk til jernholdigt strengmateriale og dermed i en vidtgående forhindring af senere korrosion af det jernholdige strengmateriale, og også i muligheden for bagefter at kunne påføre et 15 laklag uden diskontinuiteter på dette strengmateriale. En yderligere fordel ved opfindelsen ligger deri, at der til den i vidt omfang stillestående, reducerende gasatmosfære kan anvendes en gas med omgivelsestemperatur, medens gastemperaturen ved den kendte fremgangsmåde skal tilpasses til det flydende 20 metalbads smeltetemperatur. Denne kendsgerning bevirker en forenkling af apparatet ifølge opfindelsen, da en yderligere opvarmning af gassen før indledningen i ovnafgangskanalen bortfalder.The advantage of the invention lies in a flawless metallic coating for ferrous strand material and thus in a far prevention of later corrosion of the ferrous strand material, and also in the possibility of subsequently being able to apply a lacquer layer without discontinuities to this strand material. A further advantage of the invention lies in the fact that a largely ambient reducing gas atmosphere can be used with an ambient temperature gas, while the gas temperature in the known process must be adapted to the melting temperature of the liquid metal bath. This fact causes a simplification of the apparatus according to the invention, since a further heating of the gas before the introduction into the furnace outlet duct lapses.
25 Foretrukne enkeltheder ved opfindelsen er anført i underkravene.Preferred details of the invention are set forth in the subclaims.
Eksempler på dette apparat illustreres i vedlagte tegning, hvor: 30Examples of this apparatus are illustrated in the accompanying drawings, in which: 30
Fig. 1 viser en tværsnitsprojektion, som viser en stréng-ovnsudgangskanal, en hætte, som er koblet sammen med denne udgangskanal, og et bad med smeltet overtræks-materiale.FIG. 1 is a cross-sectional view showing a string furnace exit channel, a cap coupled to this exit channel, and a bath of molten coating material.
3535
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5 fig. 2 viser i hovedsagen en gentagelse af den til højre side viste del af fig. 1 i større målestok, og den viser en mindre modifikation.5 FIG. 2 generally shows a repetition of the part of FIG. 1 on a larger scale, and it shows a minor modification.
5 Med henvisning til fig. 1 vises en streng, som skal overtrækkes ved henvisningstallet 3. Denne streng føres gennem ovnudgangskanalen 4 til hætten 5, herfra ned i badet 6, som er smeltet overtræksmateriale, og derfra igennem afdrypningszonen 7, hvori overskydende overtræksmateriale eventuelt kan fjernes 10 ved luftaftørring eller på anden konventionel måde. Hætten 5 har en strengudgangsende 5A, som dykker ned i badet 6 med det smeltede overtræksmateriale.5 Referring to FIG. 1, a string is shown to be coated by reference numeral 3. This string is passed through the furnace exit channel 4 to the cap 5, from here into the bath 6, which is molten coating material, and thence through the drip zone 7, in which excess coating material may be removed by air drying or on other conventional way. The cap 5 has a strand outlet end 5A which dives into the bath 6 with the molten coating material.
Medens strengen befinder sig i kanal 4 (selve ovnen er ikke 15 vist, den kan være af konventionel udformning), udsættes den for en luftformig reducerende atmosfære, som forsøg har vist kan være en gasblanding, hovedsageligt sammensat af nitrogen men kan indeholde hydrogen i mængder, som ikke overstiger 15 volumenprocent i blandingen. Denne gas bør være affugtet. Den 20 reducerende gas kan fødes ind i kanalen 4 på konventionel måde; for eksempel gennem en serie indstrømningsdyser 8, som forsynes fra en hovedledning 9. Anvendt eller overskydende gas kan bortledes fra kanalen 4, også på konventionel måde, for eksempel via udstrømningsåbninger 10, som fører til en hoved-25 afgangsledning 11. Gassen kan føres ind i kanalen 4 med enhver egnet temperatur; normal omgivelsestemperatur er helt anvendelig.While the string is in channel 4 (the furnace itself is not shown, it may be of conventional design), it is subjected to an gaseous reducing atmosphere which experimentally has shown to be a gaseous mixture, composed mainly of nitrogen but may contain hydrogen in amounts. , which does not exceed 15% by volume of the mixture. This gas should be dehumidified. The reducing gas may be fed into the duct 4 in a conventional manner; for example, through a series of inflow nozzles 8 provided from a main conduit 9. Used or excess gas may be discharged from the conduit 4, also in a conventional manner, for example via effluent orifices 10 leading to a main discharge conduit 11. The gas may be introduced. in the channel 4 at any suitable temperature; normal ambient temperature is perfectly applicable.
Kanalen 4 indeholder et antal skillevægge med huller i som 12, 30 13 og 14. Strengen passerer fra ovnen til badet gennem skille vægshullerne, som er afgrænset så tæt som det er muligt under opretholdelse af tilstrækkelig mekanisk frigang for den gennemløbende streng.Channel 4 contains a plurality of partitions with holes in as 12, 30, 13 and 14. The string passes from the furnace to the bath through separating the wall holes, which are delimited as closely as possible while maintaining sufficient mechanical clearance for the continuous strand.
35 Det bemærkes, at der kan være et tilbagestrømningstab af gas 635 It should be noted that there may be a backflow loss of gas 6
DK 160263 BDK 160263 B
gennem adskillelsesvæggene 12 og 13 med huller. Et sådant gastab er ikke væsentligt. Gas vil også diffundere gennem en åbning 14 ind i hætten 5, hvor den tjener som erstatningsluft til opretholdelse af luftindholdet i hætten og til at holde 5 gassammensætningen deri i hovedsagen konstant. Det er indlysende, at noget gas vil gå tabt ved medrivning med den streng, som løber ud af hætten, og der kan forekomme meget små gastab i hætten på grund af oxydering.through the separation walls 12 and 13 with holes. Such a gas loss is not significant. Gas will also diffuse through an opening 14 into the cap 5 where it serves as replacement air to maintain the air content of the cap and to keep the gas composition therein substantially constant. It is obvious that some gas will be lost by entrapment with the string running out of the cap, and very small gas losses may occur in the cap due to oxidation.
10 Den luftmængde, som strømmer ind i ovnkanalens 4 udstrømningsåbninger, bør på fore trukken måde kun have så lidt overtryk, i forhold til den omgivende atmosfære, at det er tilstrækkeligt til at opretholde overtrykstilstand i udløbskanalen, men under alle omstændigheder kan såvel gasindstrømningen som -udstrøm-15 ningen styres, så det ikke blot resulterer i den nævnte over-tryksvirkning, men samtidig sikrer, at den gas, som strømmer ind i hætten, i det mindste er tilstrækkelig til at ophæve gastab, forårsaget af lækage eller på anden måde.The amount of air flowing into the outlet openings of the furnace duct 4 should preferably only have so little overpressure relative to the ambient atmosphere that it is sufficient to maintain the overpressure state in the outlet duct, but in any case both the gas inflow and - the outflow is controlled so that it not only results in said overpressure effect but at the same time ensures that the gas flowing into the cap is at least sufficient to eliminate gas losses, caused by leakage or otherwise.
20 Den gasmængde, som fødes ind i hætten 5, skal være i det mindste en indstrømning, som tjener som den krævede erstatnings-funktion i hætten, medens den samtidig skal bevare lufttilstandsvilkåret i hætten, i det mindste i området ved hættens udløb. Til dette formål tilbageholdes gas, som i modsat fald 25 ville passere fra kanalen 4 ind i hætten 5, på konventionel måde, for eksempel ved anvendelse af sædvanlige tætningsvalser som indikeret ved 15 eller ved anvendelse af drøvlere eller andre lignende indretninger anbragt i ovnudløbskanalen i nærheden af dennes strengudløbsende.The amount of gas fed into the cap 5 must be at least an influx which serves as the required replacement function in the cap while at the same time maintaining the air condition condition of the cap, at least in the area at the outlet of the cap. For this purpose, gas which would otherwise pass 25 from passageway 4 into cap 5 is retained in conventional manner, for example, by using conventional sealing rollers as indicated by 15 or by using throttles or other similar devices located in the furnace outlet duct in the vicinity. of its strand outlet end.
3030
Med henvisning til fig. 2 er der her vist et arrangement, som i hovedsagen er det samme som allerede beskrevet, undtagen for så vidt angår drøvleindretningerne, som er placeret i området for forbindelsen mellem kanalen 4A og hætten 5A.Referring to FIG. 2, there is shown an arrangement which is substantially the same as already described, except as regards the throttle devices which are located in the region of the connection between the channel 4A and the cap 5A.
3535
DK 160263 BDK 160263 B
77
Prøvekørsel med opfindelsen har vist, at opretholdelse af de krævede gasvilkår i hætten effektivt opnås, særligt hvor strengen, som håndteres, har form af en kontinuerlig strimmel, hvis bredde ret tæt nærmer sig hættens indvendige mål ved 5 hjælp af et par drøvlere som de, der vises ved 16 og 17.Testing of the invention has shown that maintaining the required gas conditions in the cap is effectively achieved, especially where the string being handled is in the form of a continuous strip whose width is quite close to the inner dimensions of the cap by means of a pair of droppers such as those shown at 16 and 17.
Drøvleren 16 er en indbygget væg af ildfast materiale, som strækker sig tværs over hættens indløbsende, og som opad rækker fra hættens bund til et niveau netop under niveauet for 10 streng 3A.The throttle 16 is a built-in wall of refractory material which extends across the inlet end of the hood and which extends upward from the bottom of the hood to a level just below the level of 10 string 3A.
Drøvleren 17 kan have form af en bjælke fremstillet af egnet, armeret keramisk fiber eller andet ildfast materiale. Denne bjælke kan være indbygget, men det foretrækkes, at den er mon-15 teret på en roterende aksel 18, således at bjælken kan drejes til den stilling, der vises med den stiplede linie 17A til lettelse af gennemtrækningen af strengens forreste ende ind i og gennem hætten. Med samme formål foretrækkes det, at der anbringes et adgangshul 19 med dæksel i hætten. Når apparatet 20 anvendes, lukkes denne åbning med dækslet, som indikeres med 20, og som kan fjernes.The throttle 17 may take the form of a beam made of suitable reinforced ceramic fiber or other refractory material. This beam may be built-in, but it is preferred that it be mounted on a rotating shaft 18 so that the beam can be rotated to the position shown by the dotted line 17A to facilitate the passage of the forward end of the string into and through the cap. For the same purpose, it is preferred that an access hole 19 with a cover be placed in the cap. When the apparatus 20 is used, this opening is closed with the cover which is indicated by 20 and which can be removed.
Claims (9)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPE512280 | 1980-08-19 | ||
| AUPE512280 | 1980-08-19 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK355581A DK355581A (en) | 1982-02-20 |
| DK160263B true DK160263B (en) | 1991-02-18 |
| DK160263C DK160263C (en) | 1991-07-22 |
Family
ID=3768649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK355581A DK160263C (en) | 1980-08-19 | 1981-08-11 | PROCEDURE FOR COATING IN AN OVEN HEATED STRING MATERIAL OF IRON METAL WITH TREATMENT OF THE STRING MATERIAL IN STANDING, REDUCING GASA MOSPHERE AND APPLICATION FOR IMPLEMENTATION OF PROCEDURE |
Country Status (23)
| Country | Link |
|---|---|
| JP (1) | JPS5760014A (en) |
| AR (1) | AR226738A1 (en) |
| AU (1) | AU543013B2 (en) |
| BE (1) | BE889991A (en) |
| BR (1) | BR8105280A (en) |
| CA (1) | CA1192101A (en) |
| DE (1) | DE3132120A1 (en) |
| DK (1) | DK160263C (en) |
| ES (1) | ES8306390A3 (en) |
| FR (1) | FR2488913A1 (en) |
| GB (1) | GB2082206B (en) |
| IE (1) | IE51782B1 (en) |
| IN (1) | IN156849B (en) |
| IT (1) | IT1171464B (en) |
| LU (1) | LU83562A1 (en) |
| MX (1) | MX156647A (en) |
| MY (1) | MY8500883A (en) |
| NL (1) | NL8103803A (en) |
| NZ (1) | NZ197931A (en) |
| PH (1) | PH16269A (en) |
| SE (1) | SE8104720L (en) |
| SG (1) | SG66784G (en) |
| ZA (1) | ZA815392B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58175520A (en) * | 1982-04-09 | 1983-10-14 | 松下電器産業株式会社 | Bevarage maker |
| US4713154A (en) * | 1985-08-08 | 1987-12-15 | Kawasaki Steel Corporation | Continuous annealing and pickling method and apparatus for steel strips |
| JPS62266073A (en) * | 1986-05-14 | 1987-11-18 | テルモ株式会社 | Apparatus for purifying body fluids |
| DE3933244C1 (en) * | 1989-10-05 | 1990-06-13 | Hoesch Stahl Ag, 4600 Dortmund, De | Continuous zinc coating appts. for coating metal strip - comprises melt alloy bath covered with hood having hydrogen, steam and inert gas atmos. and control system |
| SE9101053L (en) * | 1990-04-13 | 1991-10-14 | Centre Rech Metallurgique | PROCEDURES FOR COATING A CONTINUOUS STEEL BAND |
| JP2517169B2 (en) * | 1990-10-09 | 1996-07-24 | 新日本製鐵株式会社 | Method for producing hot dip galvanized steel sheet |
| FR2782326B1 (en) | 1998-08-13 | 2000-09-15 | Air Liquide | METHOD FOR GALVANIZING A METAL STRIP |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3320085A (en) * | 1965-03-19 | 1967-05-16 | Selas Corp Of America | Galvanizing |
| SE393403B (en) * | 1972-08-09 | 1977-05-09 | Bethlehem Steel Corp | WAY TO COVER THE SURFACE OF AN IRON STRING WITH AN AL-ZN ALLOY |
| JPS5198634A (en) * | 1975-02-27 | 1976-08-31 | Kohanno renzokuyojuaenmetsukini okeru maeshoryokangengasuno shoho | |
| JPS51128610A (en) * | 1975-05-02 | 1976-11-09 | Nippon Steel Corp | A method for reduction of steel strips in reduction furnace of continu ous heat treatment lines for steel plates for plating |
| JPS51149130A (en) * | 1975-06-18 | 1976-12-21 | Nippon Steel Corp | Method of producing zincccoated iron plate with good workability |
| US4183983A (en) * | 1978-08-17 | 1980-01-15 | Selas Corporation Of America | Method for reducing metal oxide formation on a continuous metal sheet in the hot dip coating thereof |
| FR2477900A1 (en) * | 1980-03-14 | 1981-09-18 | Heurtey Metallurgie | METHOD AND DEVICE FOR SEPARATING GASEOUS ATMOSPHERES IN ATMOSPHERE HEAT TREATMENT PLANTS |
-
1980
- 1980-08-19 AU AU74005/81A patent/AU543013B2/en not_active Expired
-
1981
- 1981-08-04 IN IN495/DEL/81A patent/IN156849B/en unknown
- 1981-08-04 NZ NZ197931A patent/NZ197931A/en unknown
- 1981-08-05 IE IE1781/81A patent/IE51782B1/en not_active IP Right Cessation
- 1981-08-05 ZA ZA815392A patent/ZA815392B/en unknown
- 1981-08-06 SE SE8104720A patent/SE8104720L/en unknown
- 1981-08-11 DK DK355581A patent/DK160263C/en not_active IP Right Cessation
- 1981-08-12 GB GB8124608A patent/GB2082206B/en not_active Expired
- 1981-08-13 NL NL8103803A patent/NL8103803A/en active Search and Examination
- 1981-08-13 DE DE19813132120 patent/DE3132120A1/en active Granted
- 1981-08-13 IT IT49111/81A patent/IT1171464B/en active
- 1981-08-14 JP JP56126854A patent/JPS5760014A/en active Granted
- 1981-08-17 BE BE0/205693A patent/BE889991A/en not_active IP Right Cessation
- 1981-08-17 FR FR8115802A patent/FR2488913A1/en active Granted
- 1981-08-18 CA CA000384117A patent/CA1192101A/en not_active Expired
- 1981-08-18 AR AR286457A patent/AR226738A1/en active
- 1981-08-18 PH PH26061A patent/PH16269A/en unknown
- 1981-08-18 BR BR8105280A patent/BR8105280A/en not_active IP Right Cessation
- 1981-08-18 LU LU83562A patent/LU83562A1/en unknown
- 1981-08-19 MX MX188817A patent/MX156647A/en unknown
-
1982
- 1982-05-27 ES ES82512591A patent/ES8306390A3/en not_active Expired
-
1984
- 1984-09-21 SG SG667/84A patent/SG66784G/en unknown
-
1985
- 1985-12-30 MY MY883/85A patent/MY8500883A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB2082206A (en) | 1982-03-03 |
| BR8105280A (en) | 1982-04-27 |
| IT8149111A0 (en) | 1981-08-13 |
| JPS5760014A (en) | 1982-04-10 |
| MX156647A (en) | 1988-09-22 |
| ES512591A0 (en) | 1983-04-01 |
| IT1171464B (en) | 1987-06-10 |
| IN156849B (en) | 1985-11-16 |
| NL8103803A (en) | 1982-03-16 |
| DE3132120C2 (en) | 1989-12-14 |
| IE811781L (en) | 1982-02-19 |
| PH16269A (en) | 1983-08-25 |
| SE8104720L (en) | 1982-02-20 |
| FR2488913B1 (en) | 1984-06-29 |
| GB2082206B (en) | 1984-05-16 |
| JPH0338322B2 (en) | 1991-06-10 |
| DE3132120A1 (en) | 1982-03-25 |
| AU543013B2 (en) | 1985-03-28 |
| IE51782B1 (en) | 1987-04-01 |
| ZA815392B (en) | 1982-08-25 |
| DK355581A (en) | 1982-02-20 |
| NZ197931A (en) | 1984-07-31 |
| FR2488913A1 (en) | 1982-02-26 |
| BE889991A (en) | 1981-12-16 |
| AR226738A1 (en) | 1982-08-13 |
| CA1192101A (en) | 1985-08-20 |
| LU83562A1 (en) | 1981-12-01 |
| MY8500883A (en) | 1985-12-31 |
| SG66784G (en) | 1985-03-15 |
| ES8306390A3 (en) | 1983-04-01 |
| AU7400581A (en) | 1982-02-25 |
| DK160263C (en) | 1991-07-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUP | Patent expired |