US3753689A - Process for obtaining a rapid mixing of liquid metals and slag in order to accelerate some reactions between the two phases - Google Patents

Process for obtaining a rapid mixing of liquid metals and slag in order to accelerate some reactions between the two phases Download PDF

Info

Publication number
US3753689A
US3753689A US00049782A US3753689DA US3753689A US 3753689 A US3753689 A US 3753689A US 00049782 A US00049782 A US 00049782A US 3753689D A US3753689D A US 3753689DA US 3753689 A US3753689 A US 3753689A
Authority
US
United States
Prior art keywords
bath
reactor
over
axially
slag
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
US00049782A
Other languages
English (en)
Inventor
A Ramacciotti
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.)
Centro Sperimentale Metallurgico SpA
Original Assignee
Centro Sperimentale Metallurgico SpA
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 Centro Sperimentale Metallurgico SpA filed Critical Centro Sperimentale Metallurgico SpA
Application granted granted Critical
Publication of US3753689A publication Critical patent/US3753689A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/56—Manufacture of steel by other methods
    • 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
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/2083—Arrangements for the melting of metals or the treatment of molten metals

Definitions

  • This invention relates to a device and a process for carrying out a rapid mixing and the possible reactions between two or more phases with different densities, for instance between two or more liquid phases, or between liquid phases and particulate solids, possibly in the presence of a suitable gaseous atmosphere.
  • This invention relates particularly to a device and a process for obtaining a rapid mixing of liquid metals and slag in order to accelerate some reactions between the two phases, e.g. in converting, refining or deoxidizing processes, etc.
  • the methods hitherto proposed are numerous. One of them comprises the falling of the metal from a considerable height into a vessel which already contains the premelted slag. Another method comprises the use of an eccentrically oscillating vessel, similar to a shaking ladle, in which the metal and the slag are strongly shaked together.
  • Another method comprises the introduction from the top into the metal-slag bath, of a mechanical agitator shaped as a pump impeller made up of refractory material.
  • Another method comprises the gurgling of an inert gas (argon) in order to obtain the same effect.
  • argon an inert gas
  • the method of the present invention permits one to obtain an extremely fine emulsion through an extremely extensive metal-slag contact surface. This permits one to cut down considerably the duration of the treatment.
  • the device embodying the method set forth hereinbefore comprises a substantially cylindrical reactor or vessel, adapted to rotate, in both senses of rotation, around a vertical axis co-inciding with the geometric axis of the reactor.
  • Said reactor is metallic, conveniently sized to stand the centrifugal force of the bath, and is lined inside by refractory material.
  • the device is provided with suitable means for rotating the reactor at variable speed and with the possibility of reversing the direction of rotation.
  • suitable means for rotating the reactor at variable speed and with the possibility of reversing the direction of rotation.
  • Other suitable means provide the tilting of the reactor and the pouring of the product for obtained at the end of the process.
  • the device further comprises at least one injector, vertically movable with respect to the reactor, suitable for blowing the required gases over the free surface of the bath.
  • the FIGURE is a diagrammatical vertical section of the device.
  • 1 is the bath with its paraboloidal free surface 2 in rotation
  • 3 is the container with trunnions 4 located in the grooves 5 of the rotatable envelope 6
  • 7 is the end portion of the blowing apparatus
  • 8 are the trajectory lines of the fluids leaving said blowing apparatus.
  • the operation of the above-mentioned device is now illustrated, only by way of example, with reference to a process for decarburizing molten pig iron.
  • Thehot metal and the slag to lbe emulsified are poured into the reactor in absence of rotation.
  • the reactor is then rotated around its own vertical axis in such a way as to reach a peripherical speed of 200 to 300 m/min along the lateral inner surface of the lining.
  • the reactor After rotating during 2 to 4 minutes, the reactor is stopped for a time not longer than 30 seconds and then is again rotated in the reverse for other 2 to 4 minutes. The cycle is finished with the stopping of the reactor, but may be repeated if required.
  • the metal may be poured into the special transfer vessel (ladle) and sent to the subsequent uses.
  • any gas oxygen, hydrogen methane, argon, etc. may be blown by a suitable lance.
  • the aforementioned device and process are usable for other various metallurgical operations such as for instance, for mixing base metal and master alloys in fast alloying processes.
  • the improvement which comprises pouring the hot metal and the slag to be emulsitied into a stationary substantially cylindrically shaped reactor having a a refractory lining; then rotat ing the reactor about the vertical axis thereof at a peripheral speed of 200 to 300 m/:min along the lateral inner surface of the lining for between 2 and 4 minutes; stopping the reactor from rotating after 2 to 4 minutes; rotating the reactor again in a direction the reverse of the initial rotation for 2 to 4 minutes; again stopping the reactor from rotating; allowing the metal and the slag to decant after the last stop for a time of 2 to 5 minutes and finally pouring the metal from the reactor into the ladle.
  • a process according to claim l further comprising the step of blowing gases downwardly axially at the surface of the bath andover the free surface of the bath to provide a particular gaseous atmosphere.
  • a process according to claim 7 further comprising rotating the reactor in a direction opposite to said the step of blowing gases downwardly axially at the surfirst direction at a speed sufficient to force the surface of the bath and over the surface of the bath to proface of the molten bath to assume a configuration vide a particular gaseous atmosphere. which is parabolic in cross-section through every

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
US00049782A 1969-07-01 1970-06-25 Process for obtaining a rapid mixing of liquid metals and slag in order to accelerate some reactions between the two phases Expired - Lifetime US3753689A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1900069 1969-07-01

Publications (1)

Publication Number Publication Date
US3753689A true US3753689A (en) 1973-08-21

Family

ID=11153726

Family Applications (1)

Application Number Title Priority Date Filing Date
US00049782A Expired - Lifetime US3753689A (en) 1969-07-01 1970-06-25 Process for obtaining a rapid mixing of liquid metals and slag in order to accelerate some reactions between the two phases

Country Status (7)

Country Link
US (1) US3753689A (enrdf_load_stackoverflow)
BE (1) BE752692A (enrdf_load_stackoverflow)
DE (1) DE2031929A1 (enrdf_load_stackoverflow)
FR (1) FR2056345A5 (enrdf_load_stackoverflow)
GB (1) GB1282956A (enrdf_load_stackoverflow)
LU (1) LU61224A1 (enrdf_load_stackoverflow)
NL (1) NL7009590A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4618427A (en) * 1984-01-25 1986-10-21 Ardal Og Sundal Verk A.S. Method of treating and breaking up a liquid with the help of centripetal force
CN108213384A (zh) * 2018-02-01 2018-06-29 深圳市铭利达精密机械有限公司 一种用于半固态压铸的电磁搅拌设备

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3793001A (en) * 1970-05-22 1974-02-19 Centro Speriment Metallurg Process for manufacturing steel
BE868872A (fr) 1977-07-11 1978-11-03 Nat Res Dev Procede pour faire contenir des phases liquides dans un recipient
FR2762526B1 (fr) 1997-04-24 2000-01-28 Jean Luc Jouvin Malaxeur d'alginate ameliore

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2611693A (en) * 1948-03-31 1952-09-23 Geyer Wallace Thomas Method for refining molten metal
US2862811A (en) * 1954-09-14 1958-12-02 Stora Kopparbergs Bergslags Ab Continuous iron and steel making in a rotary vessel
US2875036A (en) * 1955-06-15 1959-02-24 Stora Kopparbergs Bergslags Ab Method for treating molten metal
GB979605A (en) * 1962-01-30 1965-01-06 Finanziaria Siderurgica Finsid An improved process and device for refining cast-iron for steel production
US3251681A (en) * 1962-11-06 1966-05-17 Amagasaki Iron & Steel Mfg Co Method of stirring a molten metal in a transfer ladle
US3259485A (en) * 1961-12-13 1966-07-05 Stora Kopparbergs Bergslags Ab Process for imparting an intermixing motion to a liquid mass of iron and slag
US3271128A (en) * 1963-07-09 1966-09-06 Francis X Tartaron Prerefining blast furnace iron
US3401034A (en) * 1965-12-15 1968-09-10 Meehanite Metal Corp Mixing ladle

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2611693A (en) * 1948-03-31 1952-09-23 Geyer Wallace Thomas Method for refining molten metal
US2862811A (en) * 1954-09-14 1958-12-02 Stora Kopparbergs Bergslags Ab Continuous iron and steel making in a rotary vessel
US2875036A (en) * 1955-06-15 1959-02-24 Stora Kopparbergs Bergslags Ab Method for treating molten metal
US3259485A (en) * 1961-12-13 1966-07-05 Stora Kopparbergs Bergslags Ab Process for imparting an intermixing motion to a liquid mass of iron and slag
GB979605A (en) * 1962-01-30 1965-01-06 Finanziaria Siderurgica Finsid An improved process and device for refining cast-iron for steel production
US3251681A (en) * 1962-11-06 1966-05-17 Amagasaki Iron & Steel Mfg Co Method of stirring a molten metal in a transfer ladle
US3271128A (en) * 1963-07-09 1966-09-06 Francis X Tartaron Prerefining blast furnace iron
US3401034A (en) * 1965-12-15 1968-09-10 Meehanite Metal Corp Mixing ladle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4618427A (en) * 1984-01-25 1986-10-21 Ardal Og Sundal Verk A.S. Method of treating and breaking up a liquid with the help of centripetal force
CN108213384A (zh) * 2018-02-01 2018-06-29 深圳市铭利达精密机械有限公司 一种用于半固态压铸的电磁搅拌设备
CN108213384B (zh) * 2018-02-01 2019-08-09 深圳市铭利达精密机械有限公司 一种用于半固态压铸的电磁搅拌设备

Also Published As

Publication number Publication date
DE2031929A1 (de) 1971-01-07
LU61224A1 (enrdf_load_stackoverflow) 1970-09-09
GB1282956A (en) 1972-07-26
BE752692A (fr) 1970-12-01
NL7009590A (enrdf_load_stackoverflow) 1971-01-05
FR2056345A5 (enrdf_load_stackoverflow) 1971-05-14

Similar Documents

Publication Publication Date Title
US4018598A (en) Method for liquid mixing
US3501290A (en) Method of treating molten metal with arc heat and vacuum
US3753689A (en) Process for obtaining a rapid mixing of liquid metals and slag in order to accelerate some reactions between the two phases
US3703279A (en) Reactor
US3761242A (en) Method of treating molten metal by gas purging rhtough a porous plug
US3169058A (en) Decarburization, deoxidation, and alloy addition
US3013789A (en) Mobile apparatus for oxygen refining of metal
US4093452A (en) Refining liquid metal
McLean The Turbulent Tundish--Contaminator or Refiner?
US2950186A (en) Method for top blowing pulverulent burnt lime and oxygen into cast iron for refining same
US4808219A (en) Method for treating metal melts and apparatus for carrying out the method
US2875036A (en) Method for treating molten metal
US3961775A (en) Method and apparatus for liquid mixing
US3672869A (en) Continuous metallurgical process
Holappa et al. Role of slags in steel refining: is it really understood andfully exploited?
US3961779A (en) Apparatus and method for refining a metal melt
JP2889901B2 (ja) 液状鋼浴再加熱方法
US3030203A (en) Process of producing steel
US3934863A (en) Apparatus for refining molten metal and molten metal refining process
US2990272A (en) Desulphurizing molten iron
JPH02179813A (ja) 溶融金属の高純度・高清浄度化精錬方法
GB1343364A (en) Process for accelerating metallurgical reactions and apparatus for performing the process
US3592629A (en) Method for refining molten metal
JP2847774B2 (ja) 溶融金属の精錬方法
US3800630A (en) Procedure and installation for continuous steel making