EP0043605A1 - Procédé et installation de granulation de laitier - Google Patents

Procédé et installation de granulation de laitier Download PDF

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Publication number
EP0043605A1
EP0043605A1 EP81200650A EP81200650A EP0043605A1 EP 0043605 A1 EP0043605 A1 EP 0043605A1 EP 81200650 A EP81200650 A EP 81200650A EP 81200650 A EP81200650 A EP 81200650A EP 0043605 A1 EP0043605 A1 EP 0043605A1
Authority
EP
European Patent Office
Prior art keywords
water
stream
slag
chamber
granulation
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.)
Withdrawn
Application number
EP81200650A
Other languages
German (de)
English (en)
French (fr)
Inventor
Guido Monteyne
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 EP0043605A1 publication Critical patent/EP0043605A1/fr
Withdrawn legal-status Critical Current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
    • C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
    • 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
    • C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising slag

Definitions

  • the present invention relates to a process for granulating slag consisting in making a stream of molten slag fall on a stream of water under pressure and in taking advantage of the speed of the stream of water to discharge the mixture by pressure of water. of water and granulated slag through a chute arranged in the extension of the water current.
  • the invention also relates to an installation for implementing this method.
  • the water stream is, in the case of the present invention, constituted by a multitude of water jets directed substantially horizontally on the slag and generated by the passage through perforations of a front wall of a supplied chamber in pressurized water.
  • the pressure of the latter must be sufficient to drive the slag and ensure its solidification and granulation.
  • the width of the water stream must also be greater than the width of the slag stream to ensure complete granulation. This forms a pulp composed of water and granulated slag which is evacuated by a chute to a pit to undergo subsequent treatments, including filtration and drying.
  • the section of the water stream must correspond substantially to the bottom of this chute and that the water speed is sufficient. All these conditions combined require a high consumption of granulation water, consumption of up to 2,000 m 3 per hour or more for a usual flow rate of 4 to 7 tonnes of slag per minute. In other words, these conditions are opposed to the desire of specialists in the field, who would like to reduce, as much as possible, the consumption of water, and this for several reasons. This high consumption, in addition to the need to have such quantities available, has the disadvantage of requiring the necessary installations. res, including pumps. In addition, the water which is introduced into the process must again be separated from the pulp in order to obtain a filtered granulated slag with a low water content, that is to say a reduction granulation water would reduce the size of filtration facilities.
  • the object of the present invention is to provide a new granulation process of the kind described above, which allows a significant reduction in water consumption and an increase in the temperature of the granulation water, without reducing the advantages. already acquired.
  • An additional aim of the invention is to provide an installation for the implementation of this process.
  • the present invention provides a process for granulating slag, consisting of making a stream of molten slag fall on a stream of water under pressure and taking advantage of the speed of the stream of water to evacuate, by water pressure, the mixture of water and slag granulated through a chute arranged in the extension of the water stream, characterized in that the water stream is produced in such a way that it is composed of a current by upper part mainly used for granulation and a lower partial stream mainly used for evacuation, and in that the temperature and the pressure of the upper stream are higher than the temperature and the pressure of the lower stream.
  • the water from the lower stream is industrial water at low or ambient temperature, while the water from the upper stream is recycled water coming, for example, from a filter bed of a granulated slag filtration installation and is, at the time of granulation, at a temperature of about 50 to 70 °.
  • the special feature of the invention is therefore to have separated the two functions of the water involved in the process, namely granulation and discharge. Therefore, one can reduce the pressure, that is to say the flow and consumption, where it is not essential and increase the water temperature where a higher temperature is desirable. This is how high pressure is necessary in the upper part of the water stream to deflect and entrain the molten slag falling from the inlet channel and absolutely prevent the slag from crossing the water jets and settling at the bottom of the chute. On the other hand, the pressure, and consequently the consumption, of the lower partial current can be reduced to the value necessary and sufficient to ensure continuous evacuation in the chute and to avoid the formation of deposits.
  • the temperature of the latter can be increased in order to increase the particle size of the slag, without however increasing in the same proportions the final pulp temperature, since mixing the warmer water from the upper stream with the cooler water from the lower stream keeps the final pulp temperature within acceptable limits.
  • the invention also provides an installation for granulating molten slag, comprising means for producing a stream of water under pressure and projecting this stream against the slag falling substantially vertically from the end of a channel, a flow chute arranged in the extension of the stream of water for the evacuation of the slag and water, the stream of water being constituted a multitude of small jets of water generated by the passage through perforations of the front wall of a chamber supplied with water under pressure, characterized in that said chamber is divided in two and comprises an upper compartment and a compartment lower separated by a longitudinal partition and connected to two separate pipes for admission of pressurized water.
  • This chamber preferably has the shape of a substantially semi-cylindrical trough, the bottom of which has a curvature which corresponds to that of the trough and which is arranged in the extension thereof and in which the two compartments extend coaxially, the lower compartment occupying the lower part and the two lateral regions, while the upper compartment occupies the central part.
  • the front wall of the chamber consists of two perforated plates whose shapes and dimensions correspond respectively to the sections of the two compartments, with the exception of two slots, one between the lower edge of the upper plate and the partition, l other between the lower edge of the lower plate and the bottom of the chamber, the thickness of these slots being determined by protrusions on the lower edge of each of the plates.
  • Each of these slots allows the creation of a water jet in the form of a blade with a concave section which scrapes the bottom of each of the two compartments and thus ensures the evacuation in an advantageous manner of the deposits which may be there. form.
  • the blade of water ejected from the lower compartment also scrapes the bottom of the chute immediately downstream of the front wall and also prevents the formation of deposits there.
  • the two perforated plates are fixed in a removable manner, for example, by means of keys, which allows an easy and quick disassembly and replacement.
  • This chamber 18 has a bottom 26, substantially semi-cylindrical, corresponding to the shape of the chute 14 and arranged in the extension thereof.
  • the upper wall 24 is simply constituted by a flat sheet welded to the bottom 26.
  • a partition 28 also welded to the upper wall 24 separates the interior of the chamber 18 into two compartments 34 and 36.
  • This partition 28 can have a semi-shape - concentric cylinder at the bottom 26 or poly gonal as shown in the figures. The main thing is that these two compartments 34 and 36 are completely separated from each other and connected to separate intake pipes 30 and 32 so that they can be supplied with water having pressures and temperatures different.
  • the front wall 38 consists, as described in more detail below with reference to FIG. 5, of two plates 40 and 42. These plates are detachably fixed on the chamber 18 so that they can be removed easily and quickly, especially with a view to their replacement.
  • An example of simple and effective fixing consists of a key fastening as shown in Figures 2 and 4.
  • On the bottom 26 and the wall 24 is provided a series of blocks 44 each provided with a rod 46 cooperating with holes corresponding to the plates 40 and 42.
  • Each of these rods 46 is provided with an eyelet 48 intended to receive a key 50, not shown in FIG. 2. To dismantle the plates, it suffices to remove the keys 50 from the eyelet 48 rods and remove the plates. Reassembly is done in reverse order.
  • FIG. 5 shows in detail the two front plates 40 and 42. These plates have a series of openings 56 crossed by the fixing rods 46, as described above, as well as series of openings 52 and 54 intended for the formation of water jets.
  • the general shape of all the openings of the two series 52 and 54 is that of a crescent, the concave side being turned upwards. The purpose of this shape is, as regards the series of openings 52, to occupy the bottom of the chute 14 and as regards the series 54, to properly intercept and deflect the slag of molten slag falling from the laughs 12.
  • the lower edge of the lower plate 42 is provided with several protrusions 57 intended to bear on the bottom 26 of the chamber 18 and to form a slot 58 between this plate 42 and the bottom 26.
  • the upper plate 40 is provided with at least two protrusions 60 to form a slot 62 between the partition 28 and this plate 40. These slots need not be go up to the upper wall 24, but they should preferably follow the bottom of the two compartments 34 and 36.
  • the plump wall 38 in one piece, provided that it has the same features as the two juxtaposed plates 40 and 42, in particular as regards the openings 52 and 54 and the slots 58 and 62.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Disintegrating Or Milling (AREA)
  • Manufacture Of Iron (AREA)
  • Furnace Details (AREA)
EP81200650A 1980-07-04 1981-06-12 Procédé et installation de granulation de laitier Withdrawn EP0043605A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU82585 1980-07-04
LU82585A LU82585A1 (fr) 1980-07-04 1980-07-04 Procede et installation de granulation de laitier

Publications (1)

Publication Number Publication Date
EP0043605A1 true EP0043605A1 (fr) 1982-01-13

Family

ID=19729431

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81200650A Withdrawn EP0043605A1 (fr) 1980-07-04 1981-06-12 Procédé et installation de granulation de laitier

Country Status (8)

Country Link
US (1) US4374645A (es)
EP (1) EP0043605A1 (es)
AU (1) AU547845B2 (es)
BR (1) BR8104098A (es)
CA (1) CA1164214A (es)
ES (1) ES8203313A1 (es)
LU (1) LU82585A1 (es)
ZA (1) ZA813945B (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0636697A1 (en) * 1993-06-30 1995-02-01 Mitsubishi Materials Corporation Apparatus for water-granulating slag
WO1997020624A1 (en) * 1995-12-07 1997-06-12 Elkem Asa Device for granulating molten metals and slags

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU83768A1 (fr) * 1981-11-18 1983-09-01 Wurth Paul Sa Procede et installation de granulation de laitier
AU654698B2 (en) * 1991-03-13 1994-11-17 Toshiba Monofrax Co., Ltd. A method and apparatus for producing fibers
AT500345A1 (de) * 2000-06-13 2005-12-15 Voest Alpine Stahl Donawitz Biologisch wirksames kalkdüngemittel aus hochofenschlacken
US20060280907A1 (en) * 2005-06-08 2006-12-14 Whitaker Robert H Novel mineral composition
US7651559B2 (en) * 2005-11-04 2010-01-26 Franklin Industrial Minerals Mineral composition
US20070104923A1 (en) * 2005-11-04 2007-05-10 Whitaker Robert H Novel mineral composition
US7833339B2 (en) * 2006-04-18 2010-11-16 Franklin Industrial Minerals Mineral filler composition
DE102009026076A1 (de) * 2009-06-30 2011-01-13 Schlackenaufbereitung Gmbh & Co. Kg Kühlbett für Schlacken und Verfahren zum Kühlen von Schlacken
US20160326040A1 (en) * 2015-05-04 2016-11-10 Peter Beemsterboer Glass-making-quality granulated slag process
US11912608B2 (en) 2019-10-01 2024-02-27 Owens-Brockway Glass Container Inc. Glass manufacturing

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB359405A (en) * 1930-07-15 1931-10-15 Ash Company London Ltd An improved method of and apparatus for treating molten slag and like material
GB359406A (en) * 1930-07-16 1931-10-16 Frank Berry Allen Slag handling apparatus
US1916402A (en) * 1927-09-17 1933-07-04 Allen Sherman Hoff Co Method and apparatus for handling molten materials
GB464917A (en) * 1935-08-27 1937-04-27 Erik Bertil Bjorkman Method of and apparatus for producing granulate of blast furnace slag for the manufacture of white cement and plaster
US3023454A (en) * 1960-03-08 1962-03-06 Phelps Dodge Corp Hydraulic quenching and granulation of molten materials
US3374999A (en) * 1964-12-17 1968-03-26 United States Steel Corp Slag-granulating apparatus
FR2021991A1 (en) * 1968-10-31 1970-07-24 Arbed Granulated blast furnace slag
FR2284677A1 (fr) * 1974-05-17 1976-04-09 Babcock Moxey Ltd Transport et evacuation de laitier de haut fourneau

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2330038A (en) * 1940-10-14 1943-09-21 John F Ervin Method and means of disintegrating metal into abrasive material
US3201105A (en) * 1962-07-09 1965-08-17 Procesos Ind Ltd Apparatus for making steel
SE334214B (es) * 1964-07-09 1971-04-19 Elektriska Svetsnings Ab
DE2126856B2 (de) * 1971-05-27 1972-11-23 Mannesmann AG, 4000 Düsseldorf Verfahren und vorrichtung zum herstellen von metallpulver
DE2157653C3 (de) * 1971-11-20 1974-05-22 Knapsack Ag, 5033 Huerth-Knapsack Verfahren zur Granulierung einer schmelzflüssigen Mischung von Phosphorofenschlacke und Ferrophosphor
SE394604B (sv) * 1974-12-18 1977-07-04 Uddeholms Ab Forfarande och anordning for pulvertillverkning genom granulering av en smelta

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1916402A (en) * 1927-09-17 1933-07-04 Allen Sherman Hoff Co Method and apparatus for handling molten materials
GB359405A (en) * 1930-07-15 1931-10-15 Ash Company London Ltd An improved method of and apparatus for treating molten slag and like material
GB359406A (en) * 1930-07-16 1931-10-16 Frank Berry Allen Slag handling apparatus
GB464917A (en) * 1935-08-27 1937-04-27 Erik Bertil Bjorkman Method of and apparatus for producing granulate of blast furnace slag for the manufacture of white cement and plaster
US3023454A (en) * 1960-03-08 1962-03-06 Phelps Dodge Corp Hydraulic quenching and granulation of molten materials
US3374999A (en) * 1964-12-17 1968-03-26 United States Steel Corp Slag-granulating apparatus
FR2021991A1 (en) * 1968-10-31 1970-07-24 Arbed Granulated blast furnace slag
FR2284677A1 (fr) * 1974-05-17 1976-04-09 Babcock Moxey Ltd Transport et evacuation de laitier de haut fourneau

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0636697A1 (en) * 1993-06-30 1995-02-01 Mitsubishi Materials Corporation Apparatus for water-granulating slag
US5441205A (en) * 1993-06-30 1995-08-15 Mitsubishi Materials Corporation Apparatus for water-granulating slag
WO1997020624A1 (en) * 1995-12-07 1997-06-12 Elkem Asa Device for granulating molten metals and slags

Also Published As

Publication number Publication date
AU547845B2 (en) 1985-11-07
BR8104098A (pt) 1982-08-31
ES503620A0 (es) 1982-04-01
CA1164214A (en) 1984-03-27
ES8203313A1 (es) 1982-04-01
ZA813945B (en) 1982-08-25
LU82585A1 (fr) 1980-12-15
US4374645A (en) 1983-02-22
AU7164481A (en) 1982-01-07

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

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Designated state(s): AT BE DE FR GB IT NL SE

17P Request for examination filed

Effective date: 19820519

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

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Effective date: 19840118

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MONTEYNE, GUIDO