NO120474B - - Google Patents
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- Publication number
- NO120474B NO120474B NO4824/69A NO482469A NO120474B NO 120474 B NO120474 B NO 120474B NO 4824/69 A NO4824/69 A NO 4824/69A NO 482469 A NO482469 A NO 482469A NO 120474 B NO120474 B NO 120474B
- Authority
- NO
- Norway
- Prior art keywords
- layer
- container
- flow
- pump
- towards
- Prior art date
Links
- 239000000155 melt Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910000805 Pig iron Inorganic materials 0.000 claims description 2
- 230000005484 gravity Effects 0.000 claims description 2
- 238000003723 Smelting Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000161 steel melt Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
- B01F27/192—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/81—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow
- B01F27/811—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow with the inflow from one side only, e.g. stirrers placed on the bottom of the receptacle, or used as a bottom discharge pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D27/00—Stirring devices for molten material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D2003/0085—Movement of the container or support of the charge in the furnace or in the charging facilities
- F27D2003/0087—Rotation about a vertical axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D27/00—Stirring devices for molten material
- F27D27/005—Pumps
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Description
Anordning for dannelse av en strømning i reaksjonssonen mellom to i en beholder over hverandre liggende materialskikt. Device for creating a flow in the reaction zone between two layers of material lying one above the other in a container.
Oppfinnelsen vedrorer en anordning for dannelse av en stromning i reaksjonssonen mellom to i en beholder over hverandre liggende materialskikt av hvilke i det minste det nedre befinner seg i flytende tilstand og det ovre har en mindre spesifikk vekt enn det nedre, særlig mellom et slaggskikt og et råjernbad, ved hjelp av en pumpe som bringer det nedre skikt i sirkulasjon, består av et sugeror som rager ned i det tyngre skikt og er forsynt med utad rettede stromningskanaler. The invention relates to a device for creating a flow in the reaction zone between two layers of material lying one above the other in a container, of which at least the lower one is in a liquid state and the upper one has a lower specific gravity than the lower one, in particular between a slag layer and a pig iron bath, with the help of a pump that brings the lower layer into circulation, consists of a suction tube that protrudes into the heavier layer and is provided with flow channels directed outwards.
En stromning i nevnte reaksjonssone er fordelaktig hvis det ved behandling av metallsmelter gjennomfdres en reaksjon mellom smeiten og det slaggskikt som dekker smeiten eller mellom to smelteskikt, når de to skikt er vesentlig forskjellige med hen-blikk på deres spesifikke vekt eller andre fysikalske egenskaper, f. eks. deres stromningsegenskaper. Stromningen i reaksjonssonen skal bevirke at reaksjonen gjennomfores i lopet av kort tid og innbefatter hele smeiten. For dette formål kan man ved liten smeltevekt benytte manuelt betjente rbreorganer, men ved stor smeltevekt er dette ikke mulig. Her benyttes enten elektro-magnetiske roreorganer eller motordrevne roreanordninger. Sær-deles fordelaktig er det å benytte en pumpeanordning som har et tett under smelteoverflaten beliggende rotasjonslegeme med eller uten skovler eller med pumpekanaler, og som suger opp smeiten fra sin nedre del, enten ved et i pumpeaksen beliggende nedover-rettet sugeror eller ved påvirkning av de trykkforskjeller som skaper selve stromningen, idet de tilveiebringer forskjellige smeltenivåer. Den væskestrom eller de enkelte væskestråler som trer ut av pumpelegemet eller slynges ut av dette legeme,vil da foruten en tangensial komponent ha en i det vesentlige radial komponent. A flow in the aforementioned reaction zone is advantageous if, during the treatment of metal melts, a reaction takes place between the melt and the slag layer covering the melt or between two melt layers, when the two layers are significantly different in terms of their specific weight or other physical properties, e.g. e.g. their flow properties. The current in the reaction zone must ensure that the reaction is carried out in a short time and includes the entire smelting. For this purpose, with a low melt weight, manually operated rebar devices can be used, but with a high melt weight, this is not possible. Either electro-magnetic rudder devices or motor-driven rudder devices are used here. It is particularly advantageous to use a pump device that has a rotating body located close to the melt surface, with or without vanes or with pump channels, and which sucks up the melt from its lower part, either by means of a downward-directed suction pipe located in the pump axis or by the influence of the pressure differences that create the flow itself, as they provide different melting levels. The liquid stream or the individual liquid jets that emerge from the pump body or are ejected from this body will then have, in addition to a tangential component, an essentially radial component.
Med en slik mekanisk pumpeinnretning kan hele mengden av den tunge fase suges opp og fores utover langs reaksjonssonen mellom de to faser ilbpet av forholdsvis kort tid. Det har imidlertid vist seg at det kan oppnås en vesentlig reduksjon av reaksjons-tiden hvis dels den relative hastighet mellom fasene kan bkes og det dels sbrges for at den ene fases mengde bringes i kontakt med den annen fases hele mengde. Det er derved onskelig at det i reaksjonssonen opptrer en turbulent stromning fra begge faser, og at den totale mengde av de forskjellige faser kommer i inn-byrdes kontakt ilopet av kort tid. With such a mechanical pump device, the entire amount of the heavy phase can be sucked up and fed outward along the reaction zone between the two phases in a relatively short time. However, it has been shown that a significant reduction of the reaction time can be achieved if the relative speed between the phases can be reduced and it is ensured that the amount of one phase is brought into contact with the entire amount of the other phase. It is therefore desirable that a turbulent flow occurs in the reaction zone from both phases, and that the total amount of the different phases come into contact with each other over a short period of time.
For reaksjonshastigheten er imidlertid også storrelsen av reaksjonssonen utslagsgivende. Hvis pumpetverrsnittet utgjor en sirkulær eller tilnærmet sirkulær skive, vil en flate som svarer til dette tverrsnitt trekkes ut av reaksjonssonen. Hvis man onsker å holde denne reduksjon av den virksomme flate lav og å opprettholde en radial stromning over hele overflaten, må utlbps-hastigheten fra pumpen være stor. Særlig i de tilfelle hvor det er spbrsmål om adskilte stråler, er denne store hastighet vesent- However, the size of the reaction zone is also decisive for the reaction rate. If the pump cross-section forms a circular or nearly circular disc, a surface corresponding to this cross-section will be drawn out of the reaction zone. If it is desired to keep this reduction of the effective surface low and to maintain a radial flow over the entire surface, the output speed from the pump must be high. Especially in cases where there is a question about separate beams, this high speed is essential
lig også for omrbringen og turbulensen i reaksjonssonen. I also equal to the circulation and turbulence in the reaction zone. IN
det ofte forekommende tilfelle hvor man har å gjore med et forholdsvis tynt skikt som befinner seg oppå et vesentlig tyngre skikt, vil denne arbeidsmetode medfore at det lette skikt for en stor del blir revet med og samler seg på beholderens vegger. Ifblge oppfinnelsen loses denne vanskelighet ved hjelp av en pumpeanordning som utmerker seg ved at den spesifikt tyngre væske sirkuleres i beholderen og samtidig i reaksjonssonen i det vesentlige fores radialt utover, mens det spesifikt lettere skikt i noen avstand fra den egentlige reaksjonssone, hvor den sentrifugalt medbringes av den tyngre væske, mates sentripetalt utenfra innover, dvs. i motsatt retning. På denne måte sikres en reaksjonssone og dessuten at den totale mengde av begge skikt tar del i reaksjonen. in the often occurring case where one has to do with a relatively thin layer that is on top of a significantly heavier layer, this working method will mean that the light layer is largely carried away and accumulates on the walls of the container. According to the invention, this difficulty is solved by means of a pump device which is characterized by the fact that the specifically heavier liquid is circulated in the container and at the same time in the reaction zone is essentially fed radially outwards, while the specifically lighter layer is at some distance from the actual reaction zone, where it is centrifugally carried along of the heavier liquid, is fed centripetal from the outside in, i.e. in the opposite direction. In this way, a reaction zone is ensured and, moreover, that the total amount of both layers takes part in the reaction.
For å tilveiebringe den onskede stromning kan det i og for seg benyttes to forskjellige pumper. I enkelte tilfelle ville det også være mulig å påvirke stromningen på den onskede måte ved en fast fbringsanordning som ikke tar del i rotasjonen. På grunn av de generelle vanskeligheter som melder seg i forbindelse med væsker med hby temperatur når det gjelder varmebestandighet og kjemisk holdbarhet, er slike lbsninger av problemet mindre velegnet. In order to provide the desired flow, two different pumps can be used per se. In some cases, it would also be possible to influence the flow in the desired way by means of a fixed bearing device which does not take part in the rotation. Because of the general difficulties encountered in connection with high temperature fluids in terms of heat resistance and chemical durability, such solutions to the problem are less suitable.
Ifblge oppfinnelsen er det tilveiebrakt en anordning av den inn-ledningsvis nevnte art som kjennetegnes ved at strbmningskana-lene skråner slik oppover at de to skikt blir fort i traktformede strømninger utad mot beholderen slik at den ovre del av det lettere skikt på grunn av dannelsen av den traktformede overflate renner ned og inn mot beholderens midte. According to the invention, a device of the type mentioned at the outset is provided, which is characterized by the fact that the flow channels slope upwards in such a way that the two layers become fast in funnel-shaped flows outwards towards the container so that the upper part of the lighter layer due to the formation of the funnel-shaped surface runs down and towards the center of the container.
Sirkulasjonen av det lettere skikt oppnås således ved at skiktets nedre del på den stigende traktflate av den tyngre væske drives mot beholderens vegger, slik at den ovre del av dette skikt der-efter vil strbmme mot midten av seg selv fra skiktets hbyeste nivå, dvs. at skiktets ovre del strbmmer mot pumpens drivakse for derfra igjen å beveges utover i sirkulasjon. The circulation of the lighter layer is thus achieved by the lower part of the layer on the rising funnel surface being driven by the heavier liquid towards the walls of the container, so that the upper part of this layer will then flow towards the center of itself from the layer's highest level, i.e. that the upper part of the layer flows towards the pump's drive axis and from there is again moved outwards in circulation.
Det lette skiktets utoverrettede bevegelse kan fremmes ved an- The outward movement of the light layer can be promoted by
ordning av skovler eller ribber på pumpelegemets overflate. arrangement of vanes or ribs on the surface of the pump body.
Et utforelseseksempel av oppfinnelsen er nedenfor beskrevet An embodiment of the invention is described below
under henvisning til tegningen som viser et snitt gjennom en digel med en pumpeanordning ifolge oppfinnelsen. with reference to the drawing showing a section through a crucible with a pumping device according to the invention.
Digelen 1 er fylt med en smelte, f. eks. en stålsmelte, til Crucible 1 is filled with a melt, e.g. a steel melt, to
nivålinjen 2. Ovenfor smeiten foreligger det et lettere skikt, level line 2. Above the smelting there is a lighter layer,
f. eks. et slaggskikt 3. Sirkulasjonsbevegelsen av det lettere skikt kan oppnås ved en meget enkel pumpeanordning. Pumpen består av et sugeror 16 med påsatt rotasjonslegerne som er an- e.g. a slag layer 3. The circulation movement of the lighter layer can be achieved by a very simple pump device. The pump consists of a suction pipe 16 with attached rotary vanes which are
ordnet oppoverskranende med en vinkel med rorets 16 akse og er utformet med gjennomgående kanaler 17. Pumpen bæres av drivakselen 8. Den drives med et slikt turtall at smeiten som suges inn gjennom roret 16, mates utover og oppover i pilenes retning, slik at smeltens væskespeil stiger mot beholderens yt- arranged sloping upwards at an angle with the axis of the rudder 16 and is designed with continuous channels 17. The pump is carried by the drive shaft 8. It is driven at such a speed that the melt that is sucked in through the rudder 16 is fed outwards and upwards in the direction of the arrows, so that the liquid level of the melt rising towards the surface of the container
tervegg. Det derved medbrakte lettere skikt vil riktignok i sin nedre del stige til samme hoyde på beholderens innermantel, solid wall. The resulting lighter layer will, of course, rise in its lower part to the same height on the inner casing of the container,
men vil i sin ovre del stromme tilbake mot pumpens akse i den viste pilretning. Den sentrifugale utoverstromning av det lettere skikt kan fremmes ved hjelp av ribber eller skovler 15, but will in its upper part flow back towards the axis of the pump in the direction of the arrow shown. The centrifugal outward flow of the lighter layer can be promoted by means of ribs or vanes 15,
som er anordnet på kanalene 17. Ved gunstige geometriske for- which is arranged on the channels 17. In the case of favorable geometric
hold og hensiktsmessig pumpestilling kan det også arbeides uten sugeror. hold and appropriate pump position, work can also be done without a suction pipe.
Ved visse hastigheter kan slaggens tilbakestromning på over- At certain velocities, the backflow of the slag can
flaten forstyrres av for stor omløpshastighet som til og med kan fore til hvirveldannelse. Slik forstyrrelse elimineres ved hjelp av stromningsmotstand i form av et nedadragende frem- the surface is disturbed by too great a speed of rotation, which can even lead to the formation of vortices. Such disturbance is eliminated by means of flow resistance in the form of a downward
spring 18 av ildfast materiale. Fremspringet 18 er via en stbtte 19 festet til digelen. spring 18 of refractory material. The projection 18 is attached to the crucible via a stud 19.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEO0012013 | 1966-10-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
NO120474B true NO120474B (en) | 1970-10-26 |
Family
ID=7352551
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO169880A NO121600B (en) | 1966-10-11 | 1967-09-26 | |
NO4824/69A NO120474B (en) | 1966-10-11 | 1969-12-05 |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO169880A NO121600B (en) | 1966-10-11 | 1967-09-26 |
Country Status (6)
Country | Link |
---|---|
US (1) | US3554518A (en) |
BE (1) | BE704954A (en) |
CH (1) | CH508047A (en) |
GB (1) | GB1199169A (en) |
LU (1) | LU54533A1 (en) |
NO (2) | NO121600B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4018598A (en) * | 1973-11-28 | 1977-04-19 | The Steel Company Of Canada, Limited | Method for liquid mixing |
US4046559A (en) * | 1976-02-23 | 1977-09-06 | Kennecott Copper Corporation | Pyrometallurgical system for liquid-liquid contacting |
US4336999A (en) * | 1978-03-24 | 1982-06-29 | Solmat Systems, Ltd. | Selective mixer for solar pond and method of using same |
NO155447C (en) * | 1984-01-25 | 1987-04-01 | Ardal Og Sunndal Verk | DEVICE FOR PLANT FOR TREATMENT OF A FLUID, E.g. AN ALUMINUM MELT. |
EP0183402B1 (en) * | 1984-11-29 | 1988-08-17 | Foseco International Limited | Rotary device, apparatus and method for treating molten metal |
US5275385A (en) * | 1992-12-23 | 1994-01-04 | Praxair Technology, Inc. | Rotor speed control for an aluminum refining system |
NO307289B1 (en) | 1998-07-08 | 2000-03-13 | Alu Innovation As | Rotor for handling liquid |
US20010022755A1 (en) * | 1999-12-20 | 2001-09-20 | Holtzapple Mark T. | Mixer system and method |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1740752A (en) * | 1924-08-12 | 1929-12-24 | Nat Lead Co | Treating lead alloys |
US2195092A (en) * | 1939-03-02 | 1940-03-26 | American Metal Co Ltd | Apparatus for stirring molten metal |
US2290961A (en) * | 1939-11-15 | 1942-07-28 | Essex Res Corp | Desulphurizing apparatus |
US2397737A (en) * | 1942-07-14 | 1946-04-02 | Essex Res Corp | Process of desulphurizing |
US2660525A (en) * | 1952-01-22 | 1953-11-24 | Charles B Foster | Method of extracting lead from its sulfides |
US3015554A (en) * | 1957-04-18 | 1962-01-02 | Rummel Roman | Method and device for carrying out metallurgical processes, particularly air refining processes |
GB956600A (en) * | 1960-07-07 | 1964-04-29 | Ostberg Jan Erik | Method of stirring, dispersing or homogenising metal or slag charges having a temperature of at least 800íµ., and mechanical device for such stirring, etc |
-
1967
- 1967-09-20 CH CH1324467A patent/CH508047A/en not_active IP Right Cessation
- 1967-09-26 LU LU54533D patent/LU54533A1/xx unknown
- 1967-09-26 NO NO169880A patent/NO121600B/no unknown
- 1967-10-06 GB GB45856/67A patent/GB1199169A/en not_active Expired
- 1967-10-09 US US673542A patent/US3554518A/en not_active Expired - Lifetime
- 1967-10-11 BE BE704954D patent/BE704954A/xx unknown
-
1969
- 1969-12-05 NO NO4824/69A patent/NO120474B/no unknown
Also Published As
Publication number | Publication date |
---|---|
NO121600B (en) | 1971-03-22 |
GB1199169A (en) | 1970-07-15 |
CH508047A (en) | 1971-05-31 |
BE704954A (en) | 1968-02-15 |
LU54533A1 (en) | 1967-11-27 |
US3554518A (en) | 1971-01-12 |
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