EP0054130B1 - Tambour rotatif à projection pour laitier métallurgique - Google Patents

Tambour rotatif à projection pour laitier métallurgique Download PDF

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Publication number
EP0054130B1
EP0054130B1 EP81108576A EP81108576A EP0054130B1 EP 0054130 B1 EP0054130 B1 EP 0054130B1 EP 81108576 A EP81108576 A EP 81108576A EP 81108576 A EP81108576 A EP 81108576A EP 0054130 B1 EP0054130 B1 EP 0054130B1
Authority
EP
European Patent Office
Prior art keywords
rotary drum
water
accordance
projector
chambers
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
Application number
EP81108576A
Other languages
German (de)
English (en)
Other versions
EP0054130A1 (fr
Inventor
Clément Burton
André Kremer
Hubert Stomp
Marc Solvi
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.)
Paul Wurth SA
Original Assignee
Paul Wurth SA
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 Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP0054130A1 publication Critical patent/EP0054130A1/fr
Application granted granted Critical
Publication of EP0054130B1 publication Critical patent/EP0054130B1/fr
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C21B3/08—Cooling slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/022—Methods of cooling or quenching molten slag
    • C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/052—Apparatus features including rotating parts
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/052—Apparatus features including rotating parts
    • C21B2400/056—Drums whereby slag is poured on or in between

Definitions

  • the invention relates to a water-cooled centrifugal drum with water-cooled blow bars for producing slag sand or pumice from metallurgical slags.
  • a known possibility of processing the liquid slag consists in mechanical impact and centrifugal treatment.
  • a system of this type is described in more detail in AT-B-337222.
  • a method and a production plant for foamed slag are proposed, in which a mechanical treatment of a metallurgical slag stream is carried out with the aid of a rotating drum, the liquid slag being first subjected to swelling by supplying water. The slag that then falls down onto the drum is torn apart by transverse bars attached to the drum and flung away in an arc.
  • a major problem in systems with centrifugal drums are the downtimes, particularly in the area of the blow bars, with which the drum casing is provided.
  • the drum itself is water-cooled from the inside and the strips may also be provided with cavities for water circulation, this cooling has so far not been able to be carried out specifically and intensely enough to prevent destruction, in particular of the blow molding weld seams, within the shortest possible time. So corresponds to B. the lifespan of the known drums processing only about 10,000 tons of slag.
  • the drum jacket In order to avoid air pockets and circulation congestion in the cooling channels, the drum jacket also had to be provided with openings through which the cooling water can escape in order to be thrown away with the slag.
  • the disadvantage here is that this addition of water, which is essential for cooling, also gets into the reprocessing process of the Schlakke and, as already noted above, is not absolutely desirable there, due to its influence on the quality of the resulting product, at least not in such quantities as it is for the Cooling the drum are necessary.
  • a centrifugal drum of the type mentioned at the outset characterized in that the outer casing and the blow bars consist of cooling tubes which run closely together in the axial direction and which on one side have a distribution chamber with a cooling water inlet and on the opposite side a collector chamber is connected to a water outlet.
  • the drum is supported by two lateral outer flanges 14, 16, which are firmly connected to two hubs 6, 8. These two hubs are provided with internal, preferably axial bores 10, 12 for the supply or discharge of cooling water.
  • the outer flanges 14, 16 are welded to an inner flange 15 and 19 via a cylindrical intermediate piece 13 and 17, respectively, and form with them a distributor chamber 28 and a collector chamber 30 for the cooling water.
  • the drum shell consists of a number of cooling tubes 20, 22 welded to one another in the longitudinal direction, which connect the distributor chamber 28 to the collector chamber.
  • the drum jacket is preferably carried by an inner fixed jacket 18 which is welded to the inner flanges 15, 19 on both sides.
  • a number of radial blow bars 26 are attached to the drum jacket 24 to intensify the impact and centrifugal effect. These blow bars 26 are also cooled and, as shown in FIG. 2, can consist of approximately rectangular bars with cooling channels 32. But you can also as a further development of the invention from individual, e.g. there are three cooling tubes lying one above the other in the radial direction and welded to one another. The cooling channels 32 or the welded-together cooling tubes of the blow bars 26 are also connected to the two chambers 28 and 30.
  • the bores 120, 122 (see FIG. 3) for receiving the cooling tubes 20, 22 in the flanges 15, 19 are preferably radially offset. So that will prevents bores 120, 122 from forming an annular interruption in the flanges.
  • the associated cooling tubes 22 are bent radially on both sides accordingly (see FIG. 1).
  • the flanges 15, 19 also have cutouts 34 (see FIG. 3) for receiving the blow bars 26.
  • FIG. 2 shows how the cooling tubes 20, 22 are welded to one another and to the inner jacket 18, and the strips 26 are welded to this jacket 18 and the cooling tubes 20, 22. It can be seen that the most vulnerable weld seams, that is those between the inner jacket 18 and the strips 26, i. H. the seams 36 are in an intensely cooled area.
  • driver elements in the chamber 28 In order to prevent that on the entry side of the cooling water, due to the inertia, a standing or slower rotating "water flange" in the chamber 28, which would hinder the flow into the cooling pipes 20, 22, there are driver elements in the chamber 28 provided which immediately impose the same rotational speed as that of the drum on the water entering the chamber 28 through the bore 10. These driver elements can, in a simple manner, as indicated by dashed lines in FIG. 3, consist of radial blades 40 which are welded to the flanges 14 and 15 on both sides. Similar measures can be taken in the collector chamber.
  • the chambers 28, 30 are provided with ventilation plugs 38, 40, in order in particular to remove air pockets before the first start-up of the drum, which could impair the cooling water circulation and, if appropriate, can serve as drain plugs.
  • the proposed centrifugal drum design permits very intensive cooling of the parts at risk, since the entire cooling water throughput takes place specifically at the periphery of the drum. There are no more air pockets in the parts to be cooled, and the cooling water is distributed evenly over the drum circumference.
  • the cooling device according to the invention also has a positive influence on the treatment process itself in the sense that the cooling water is no longer thrown out of the drum jacket and thus adversely affects the treatment process of the slag.
  • the slag can, as desired, be cooled by air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Claims (6)

1. Tambour rotatif à projection refroidi à l'eau avec battoirs également refroidis à l'eau, pour la production de sable de laitier ou de pierre ponce artificielle à partir de laitier métallurgique, caractérisé en ce que l'enveloppe extérieure (24) et les battoirs (26) sont constitués de tuyaux de refroidissement (20, 22) disposés en direction axiale et près les uns des autres, qui sont reliés d'un côté à une chambre de distribution (28) avec une entrée d'eau de refroidissement et, du côté opposé, à une chambre de collecteur (30) avec une évacuation d'eau.
2. Tambour rotatif à projection, selon la revendication 1, caractérisé en ce que la chambre de répartition (28) est équipée d'éléments d'entraînement.
3. Tambour rotatif à projection, selon la revendication 1 ou 2, caractérisé en ce que la chambre de collecteur (30) est également équipée d'éléments d'entraînement.
4. Tambour rotatif à projection, selon les revendications 1 à 3, caractérisé par des raccordements des tuyaux (120, 122) décalés radialement, aux chambres (28, 30) pour les tuyaux de refroidissement droits (20) et pour les tuyaux de refroidissement à baïonnette (22).
5. Tambour rotatif à projection, selon les revendications 1 à 4, caractérisé par des évidements (34) dans les chambres (28, 30) pour recevoir et fixer les battoirs (26) et pour la jonction hydraulique de leurs conduites de refroidissement avec l'intérieur des chambres (28, 30).
6. Tambour rotatif à projection, selon les revendications 1 à 5, caractérisé par des bouchons de dégazage (38, 40) à la périphérie des chambres (28,30).
EP81108576A 1980-12-12 1981-10-20 Tambour rotatif à projection pour laitier métallurgique Expired EP0054130B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU83000A LU83000A1 (de) 1980-12-12 1980-12-12 Schleudertrommel fuer metallurgische schlacke
LU83000 1980-12-12

Publications (2)

Publication Number Publication Date
EP0054130A1 EP0054130A1 (fr) 1982-06-23
EP0054130B1 true EP0054130B1 (fr) 1985-01-16

Family

ID=19729544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108576A Expired EP0054130B1 (fr) 1980-12-12 1981-10-20 Tambour rotatif à projection pour laitier métallurgique

Country Status (5)

Country Link
US (1) US4492342A (fr)
EP (1) EP0054130B1 (fr)
CA (1) CA1177646A (fr)
DE (1) DE3168375D1 (fr)
LU (1) LU83000A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110093463B (zh) * 2019-05-31 2020-12-01 安徽中巨机电设备有限公司 一种钢渣回收处理系统
CN113877697B (zh) * 2021-10-12 2023-02-24 东北大学 一种熔体撞击破碎粒化系统及方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE229560C (fr) *
DE35751C (de) * J. GOTTLOB und J. MAUS in Köln, vor den Siebenburgen Nr. 3 Kühlapparat mit spiralförmiger Rinnenpfanne
DE257089C (fr) * 1900-01-01
CH35751A (de) * 1906-02-23 1906-10-15 Colloseus Dr Heinrich Apparat zum Zerstäuben von feuerflüssiger Hochofenschlacke
DE337222C (de) * 1920-04-28 1921-05-27 Erich Tschimpke Taschenlampen- und Handlampenbatterie
US2792042A (en) * 1956-02-14 1957-05-14 Richard M Dwyer Meat grinders
US3310391A (en) * 1962-08-31 1967-03-21 Flex O Lite Mfg Corp Method of and apparatus for production of glass beads by use of a rotating wheel
JPS5113087B1 (fr) * 1971-07-12 1976-04-24
AT337222B (de) * 1973-01-12 1977-06-27 Nat Slag Ltd Vorrichtung zur pelletisierung von geschmolzenem material, insbesondere hochofenschlacke
CH566167A5 (fr) * 1973-09-28 1975-09-15 Bicik Vladislav
LU73623A1 (fr) * 1975-10-21 1977-05-24
US4050884A (en) * 1976-03-04 1977-09-27 Richard Jablin Slag waste heat boiler
JPS53100990A (en) * 1977-02-15 1978-09-02 Ishikawajima Harima Heavy Ind Co Ltd Inner wall cooling apparatus for rotary drum
LU77160A1 (fr) * 1977-04-19 1979-01-18
JPS5456627A (en) * 1977-10-13 1979-05-07 Nakayama Steel Works Ltd Method and apparatus for making blast furnace slag crushed sand

Also Published As

Publication number Publication date
LU83000A1 (de) 1982-07-07
CA1177646A (fr) 1984-11-13
DE3168375D1 (en) 1985-02-28
EP0054130A1 (fr) 1982-06-23
US4492342A (en) 1985-01-08

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