DE2200345A1 - Granulated metal platelets - by casting onto water immersed wheel - Google Patents

Granulated metal platelets - by casting onto water immersed wheel

Info

Publication number
DE2200345A1
DE2200345A1 DE19722200345 DE2200345A DE2200345A1 DE 2200345 A1 DE2200345 A1 DE 2200345A1 DE 19722200345 DE19722200345 DE 19722200345 DE 2200345 A DE2200345 A DE 2200345A DE 2200345 A1 DE2200345 A1 DE 2200345A1
Authority
DE
Germany
Prior art keywords
water
granulated metal
onto water
platelets
metal platelets
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.)
Pending
Application number
DE19722200345
Other languages
German (de)
Inventor
Pietro Dr Pizzio
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.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
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 Degussa GmbH filed Critical Degussa GmbH
Priority to DE19722200345 priority Critical patent/DE2200345A1/en
Publication of DE2200345A1 publication Critical patent/DE2200345A1/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/06Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/10Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying using centrifugal force

Landscapes

  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

Granulated metal platelets are made by directing a molten metal jet onto the rim of a circular rotating disc, which is totally immersed in water; the speed of the wheel rim being sufficient to make the water foam. Pref. the rim's surface is covered by 2 cm. of water. The platelets obtd. are used for hydrometallurgical extraction of metals permitting selective dissolution of alloy components.

Description

Verfahren zur Herstellung von plättchenförmigen Motallgranulaten. Process for the production of platelet-shaped metal granulates.

Die Herstellung von plättchenförmigem Granulat ist bei der Rückgewinnung von Metallen durch hydrometallurgisches Verfahren erforderlich. Nach solchem Verfahren wird die granulierte Legierung einen Laugungsprozess unterworfen, wobei ein oder mehrere Legierungskomponenten durch ein geeignetes Reaktionsmittel herausgelöst werden, während rlie übrigen Konponenten in metallischem Zustand zurückbleiben.The production of platelet-shaped granules is in the process of being recovered of metals by hydrometallurgical process required. After such a procedure the granulated alloy is subjected to a leaching process, with one or several alloy components dissolved out by a suitable reaction agent while all other components remain in a metallic state.

Nur durch Verwendung von dünnwandigen Granalien ist eie einwandfreie Trennung der Legierungskomponenten möglich.It is only flawless if thin-walled granules are used Separation of the alloy components possible.

Nach einem alten und bekannten Verfahren entstehen GranaLien durch langsames Giessen der Schmele in kaltes Wasser. liauptsächlich von der Geschicklichkeit des Schmelzers ist die Feinheit des Granulats abhängig. Jedoch in allen Fällen besitzen die erhaltenen Granalien eine kugelartige Form, die für den Laugungsprozess nicht geeignet ist, weil die mittlere one des Kernes vom Oxydationsmittel schwer erreichbar ist.GranaLien are created using an old and well-known process slowly pouring the Schmele into cold water. mainly on skill the fineness of the granulate depends on the melter. However, in all cases own the granules obtained have a spherical shape that is not necessary for the leaching process is suitable because the middle one of the core is difficult to reach from the oxidizing agent is.

Das für das Laugungsverfahren günstigere Granulat ist charakterisiert von flachen, leicht gelockerten Granalien, deren Ausdehnung zwischen 0,5 und 1,5 cm liegt und deren Dicke 1 mm nicht übersteigt. Dünne Granalien mit einer übermassigen Ausdehnung sind ungünstig, weil sei wegen es niedrigeren Schüttgewichtes grössere Reaktionsgefässe verlangen. Viel zu fein verteilte Granalien sind ebenso unerwünscht, weil sie im Reaktionsgefäss kompakte Schichten bilden, die den Durchlauf der Lösung behindern oder sogar zu Verstopfungen führen.The granulate, which is more favorable for the leaching process, is characterized of flat, slightly loosened granules, their dimensions between 0.5 and 1.5 cm and its thickness does not exceed 1 mm. Thin granules with an excessive one Expansion is unfavorable because it is greater because of the lower bulk weight Request reaction vessels. Granules that are much too finely divided are also undesirable, because they form compact layers in the reaction vessel that allow the solution to flow through impede or even lead to constipation.

Trotz der zunehmenden Bedeutung der Nassmetallurgie ist rn der Fachliteratur kein Granulierverfahren bekannt, das die Möglich keit gibt, die für den Laugungsprozess geeigneten Granalien herzustellen.Despite the increasing importance of wet metallurgy, the technical literature No granulation process known that gives the possibility for the leaching process to produce suitable granules.

Es wurde nun gefunden, dass sich derartige plättchenförmige Metallgranulate dadurch erzeugen lassen, dass eine Schmelze des Metalls auf den Rand einer unter Wasser rotierenden Scheil gegossen wird, wobei die Randgeschwindigkeit so hoch ist, das das Wasser aufgeschäumt wird.It has now been found that such platelet-shaped metal granulates let it be produced by a melt of the metal on the edge of an underneath Water is poured rotating Scheil, the edge speed is so high, that the water is foamed.

Eine Apparatur zur Durchführung des erfindungsgemässen Verfahrens ist in der Abb. 1 dargestellt.An apparatus for carrying out the method according to the invention is shown in Fig. 1.

Sie besteht aus einem fahrbaren Kessel K, in dessen innerem Raum die Stahlscheibe S vom Motor M in Rotation gesetzt wird.It consists of a mobile boiler K, in the interior of which the Steel disk S is set in rotation by the motor M.

Da die Scheibe während des Rotierens die Flüssigkeit gleichzeitig wegschleudert und in Kreislaufbewegung setzt, wirkt ein Stromstörer T durch seine Neigung, die Flüssigkeit auf die Scheibe zurückführen. Der Kessel ist mit einem Wasserzulauf F und mit einem Wasserablauf B verschen, so dass eine beliebige Abschreckungstemperatur durch einen günstiger Wasseraustausch behalten werden kann. Durch die Apparatur können verschiedene Arten von Granulat erzeugt werden, indem man die folgenden Parameter variiert: - Giesstemperatur - Schlemzmenge eingegossen in der Zeiteinheit - Abstand der Giessrinne von der Drchscheibe - Höhe der Flüssigkeit auf der Scheibe - Scheibengeschwindigkeit - Temperatur des Wassers.Since the disk while rotating the liquid at the same time flung away and set in circulation, a baffle T acts through its Tendency to return the liquid to the disc. The kettle is with a Give away water inlet F and with a water outlet B, so that any quenching temperature can be retained by a favorable water exchange. Through the apparatus Different types of granules can be produced by using the following parameters varies: - pouring temperature - amount of slurry poured in the unit of time - interval the pouring chute from the threshing disc - height of the liquid on the disc - disc speed - temperature of the water.

Die Versuche wurden durchgeführt durch dio Granul ierung einer Ag/Sn/Cu-Legierung. Die Herstellung des für den Laugungsprozes geeigneten Granulats mit den vorher beschriebenen Eigenschaften erfolgte unter Einhaltung von folgenden Versuchsbedingungen: Beim Eingiessen war die Temperatur der Schmelze auf 100° C oberhalb ihres Schmelzpunktes eingestellt; die Regelmässigkeit der Granulation wurde verbessert durch das Ausgiessen der Schmelze vom Kippofen in ein Graphit-Schriffchen, das eine Bohrung von 6 mm Durchmesser hatte, durch die die geschmolzene Legierung auf die Scheibe gelangt. Die Geschwindigkeit der Scheibe betrug 1400 U/Min.; der Abstand der Giessrinne von der Scheibe war etwa 40 cm; der Giessstrahl tra# die Scheibe etwa 2,5 cm vom Rand entfernt, an dieser Stelle war die Wasserschicht etwa 2 cm hoch. Die erhaltenen Gra@alien hatten ein Schüttggewicht von ca. 1,5.The tests were carried out by granulating an Ag / Sn / Cu alloy. The production of the for the leaching process suitable granules with the properties described above was carried out in compliance with the following Test conditions: When pouring, the temperature of the melt was 100 ° C set above their melting point; the regularity of the granulation became improved by pouring the melt from the tilting furnace into a graphite chip, which had a 6 mm diameter bore through which the molten alloy gets on the disc. The speed of the disk was 1400 rpm; the The distance between the pouring channel and the disc was about 40 cm; the pouring stream tra # die Disc about 2.5 cm from the edge, at this point the water layer was about 2 cm high. The gra @ alien obtained had a bulk weight of approx. 1.5.

Claims (2)

PATENTANSPRÜCHEPATENT CLAIMS 1. Verfahren zur Herstellung von plättchenförmigen Metallgranulaten, dadurch gekennzeichnet, dass eine Schmelze des Metalls auf den Rand einer unter Wasser rotierenden Scheibe gegossen wird, wobei die Randgeschwindigkeit so hoclt ist, dass das Wasser Aufgeschäumt wird.1. Process for the production of platelet-shaped metal granulates, characterized in that a melt of the metal is placed on the edge of one under Water rotating disk is poured, whereby the edge speed so hoclt is that the water is frothed. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Wasserschicht etwa 2 cm hoch über der Scheibenfläche liegt.2. The method according to claim 1, characterized in that the water layer about 2 cm high above the disc surface.
DE19722200345 1972-01-05 1972-01-05 Granulated metal platelets - by casting onto water immersed wheel Pending DE2200345A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19722200345 DE2200345A1 (en) 1972-01-05 1972-01-05 Granulated metal platelets - by casting onto water immersed wheel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722200345 DE2200345A1 (en) 1972-01-05 1972-01-05 Granulated metal platelets - by casting onto water immersed wheel

Publications (1)

Publication Number Publication Date
DE2200345A1 true DE2200345A1 (en) 1973-07-12

Family

ID=5832353

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19722200345 Pending DE2200345A1 (en) 1972-01-05 1972-01-05 Granulated metal platelets - by casting onto water immersed wheel

Country Status (1)

Country Link
DE (1) DE2200345A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK153743B (en) * 1976-01-30 1988-08-29 United Technologies Corp Apparatus for the manufacture of metal powders

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK153743B (en) * 1976-01-30 1988-08-29 United Technologies Corp Apparatus for the manufacture of metal powders

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