DE432025C

DE432025C - Process for the extremely fine grinding of solid substances or for the production of colloidal solutions

Info

Publication number: DE432025C
Application number: DEO14008D
Authority: DE
Original assignee: ODERBERGER CHEMISCHE WERKE AKT
Current assignee: ODERBERGER CHEMISCHE WERKE AKT
Priority date: 1924-01-15
Filing date: 1924-01-15
Publication date: 1926-07-21

Description

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Seit längerer Zeit ist man bestrebt, Mahlvorrichtungen zu bauen, die in bezug auf Feinheit bei mäßigem Kraftverbrauch höhere Leistungen gestatten als die bisher üblichen Kugelmühlen, Schlagstiftmühlen o. dgl. Eine besondere Förderung erhielten diese Bemühungen, als durch Versuche P 1 a u s ο η s nachgewiesen wurde, daß schnellaufende Naßmühlen ein ausgezeichnetes Mittel sind, umFor a long time, efforts have been made to build grinding devices with respect to Fineness with moderate power consumption allow higher performance than the usual ones up to now Ball mills, pin mills or the like. These efforts received special funding, than it was demonstrated by experiments P 1 a u s ο η s that high-speed wet mills are an excellent means to

ίο die Überführung fester Teilchen in kolloidale Lösungen zu erleichtern.ίο the conversion of solid particles into colloidal ones Solutions to facilitate.

Allen bisher gebauten Naßmühlen haftet indessen der schwere Fehler an, daß ein sehr erheblicher Teil der Kraft durch die Reibung zwischen dem umhergeschleuderten Gut und der Gefäßwand aufgezehrt wird. Auch der an sich sinnreiche Gedanke Plausons, das Umlaufen des Gutes in der Mühle durch exzentrische Lagerung des Schlägerwerkes zuAll wet mills built so far, however, have the grave error that a very considerable part of the force due to the friction between the material being thrown around and the vessel wall is consumed. Even Plauson's in itself ingenious thought, that Circulation of the goods in the mill due to the eccentric mounting of the hammer mechanism

so beheben, hat im Betriebe nicht standgehalten, denn auch in der Plausomnühle läuft das Gut um.fix in this way did not hold up in the company, because it also works in the Plausomnühle Good around.

Die Erfindung hat den Zweck," durch Behebung der erwähnten inneren Reibung anThe invention aims "by eliminating the internal friction mentioned

S5 Kraft zu sparen und besteht in einem Verfahren mit einer zur Ausführung des Verfahrens geeigneten Vorrichtung mit der Besonderheit, daß das Gut in einem Flüssig-'keitsstrom mit mäßiger Geschwindigkeit nur durch den unteren, mit Schlagstiften versehenen Teil eines eine Schlagstiftscheibe enthaltenden Gehäuses geleitet wird, so daß es in dem Gehäuse nicht mit herumgeschleudert werden kann. Nach seinem Austritt aus der Mühle wird es durch eine Pumpe mit mäßiger Geschwindigkeit außerhalb der Mühle wieder zur Schlagstelle zurückgeleitet, bis die Zerkleinerung genügend weit fortgeschritten ist. Eine zur Ausübung des hier angegebenen Verfahrens geeignete Vorrichtung ist in Abb. ι bis 3 beispielsweise und schematisch dargestellt. Hierbei ist 1 das Gehäuse, in dem feste Widerstände oder Anschläge 10 nur zwischen der Ein- und der Austrittsöffnung der Rohrleitung 4 im Gehäuse vorhanden sind, während sie in den oberen Teilen des Gehäuses fehlen. 2 ist eine als Schlagkörper wirkende Scheibe, die in der Nähe ihres Umfanges beiderseits mit Schlagstiften besetzt ist; 3 und 4 sind Rohrleitungen mit eingeschalteter Pumpe 5 und einem Vorratsbehälter 6 mit Einfüllöffnung 7. Die durch die Füllöffnung aufgegebene zu behandelnde Masse wird durch die Pumpe 5 und das Rohr 3 der Zerkleinerungsvorrichtung 1 zugeführt, von wo sie durch Rohr 4 dann dem Behälter 6 zugeleitet wird. Hier kann sie bei 8 entleert werden. Die Arbeitsweise ist im allgemeinen absatzweise, indem erst der Behälter 6 gefüllt und die Masse dann soS5 to save energy and consists of a procedure with a device suitable for carrying out the method with the special feature, that the good is only in a stream of liquid at a moderate speed through the lower part, provided with strikers, of a striker disc containing a striker Housing is directed so that it can not be thrown around in the housing. After leaving the Mill it is returned by a pump at moderate speed outside the mill returned to the impact site until the comminution has progressed sufficiently. A device suitable for carrying out the method specified here is shown schematically in FIGS. 1 to 3 by way of example shown. Here 1 is the housing in which fixed resistors or 10 stops only present between the inlet and the outlet opening of the pipe 4 in the housing are, while they are absent in the upper parts of the case. 2 is an impact body acting disc, which is studded with pins on both sides in the vicinity of its circumference is; 3 and 4 are pipelines with the pump 5 switched on and a storage tank 6 with filling opening 7. The mass to be treated is fed through the filling opening by the pump 5 and the Pipe 3 of the shredding device 1 supplied, from where it is then through pipe 4 to the Container 6 is fed. Here it can be emptied at 8. The way it works is generally intermittently, by first filling the container 6 and then filling the mass in this way

FilmMovie

Claims

is moved through the housing ι for a long time until the desired fine grinding is achieved will. However, if the container 6 is made large enough and the pipes 3 and 4 are arranged as well as the openings 7 and 8 accordingly, you can also work continuously, in that at 7 there is a constant influx, at 8 there is an outflow. Conversely, it is recommended not to completely omit the container 6, since it is advantageous if in of the grinding device outside the area of the disintegrator pins, nothing to be treated Well located. In order to ensure this advantage, the entry and exit are also shown in Fig. 1 the masses passing through the crushing device 1 are arranged so that the inlet pipe 3 and the outlet pipe 4 together form a tangent on the housing of the comminuting device represent, so the good flows past this so to speak. Working with such a device resulted in the surprising fact that not only the energy saving initially aimed for was achieved to the greatest extent, but that it also succeeded in crushing and colloidization can be carried out much better than with all previously known Means. The theoretical explanation for this was found immediately, rather than through experiments it was found that the liquid material here at a speed of only 0.7 m emerged from the mill, while the mallet had a peripheral speed of Reached 150 m. It is therefore full in the mill according to the present invention Speed of the club compared to the relatively almost stationary good exploited while in all other wet mills only the difference in speeds between the beaters on the one hand and the one on the other rapidly circulating liquid material on the other hand comes into effect. This proportionate The rest of the liquid makes it possible to achieve a real impact against the as Anvil-acting liquid to exercise.

It should be noted that the liquid flowing through the mill from the Striker pins 9 is in no way torn with all around and that this does not have any pumping action exert on the liquid flowing through the tube 4. The liquid flows through it Rather, the working space only with the speed given to it by the pump 5 - as low as possible - and the pins 9 only work in this liquid flowing past them, without them to take with you as a whole. The stops 10 could also be omitted under certain circumstances.

It should also be pointed out that the liquid to be and parts of the tube 4 leading away from it again by no means exactly together need to form a straight piece of pipe that they rather also have a certain angle are allowed to form with each other if only the liquid is thereby guided past the striking disk 2 below. The one above of the tube 4 lying part of the housing remains essentially empty and is at most with Foam or splashes filled.

As far as the substances to be treated according to the method described are concerned, for example only mentioned: fine grinding of ores as preparation for the slurry process, processing of Karlin, earth colors, Graphite, of fillers in the paper, rubber and cosmetic industries, as well as the manufacture colloidal solutions of solids and emulsions of two liquids with each other. The area of application is practical of the invention quite unlimited.

P λ τ ε ν τ claims:

i. Process for the extremely fine grinding of solids or for production colloidal solutions, characterized in that a liquid stream consisting of a uniform liquid or a liquid mixture, in which the solid bodies in question are slurried or suspended, or a mixture of different liquids at a relatively low speed through the area of the housing of a rotating as quickly as possible Crushing device is constantly passed through tangentially.

2. Apparatus for carrying out the method according to claim 1, consisting from a housing (r) accommodating a striker disk (2), on the inlet and outlet openings for the to be treated Mixtures are attached so that these mixtures pass through the area of the rotating parts of the crushing device can constantly flow through without filling the interior of the housing (1) in the rest.

3. Embodiment of the device according to claim 2, characterized in that that the housing inside only cooperates there in its lower part with the pins of the rotating disc (2) carries solid resistances or stops (10) where the liquid flows through the housing.

1 sheet of drawings.