DE378026C - Milling process with step-by-step comminution of the material to be ground in the pre-grinding and fine grinding chambers arranged in a grinding housing, but separated from one another - Google Patents

Milling process with step-by-step comminution of the material to be ground in the pre-grinding and fine grinding chambers arranged in a grinding housing, but separated from one another

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Publication number
DE378026C
DE378026C DER50428D DER0050428D DE378026C DE 378026 C DE378026 C DE 378026C DE R50428 D DER50428 D DE R50428D DE R0050428 D DER0050428 D DE R0050428D DE 378026 C DE378026 C DE 378026C
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DE
Germany
Prior art keywords
grinding
fine
ground
separated
comminution
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
DER50428D
Other languages
German (de)
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.)
Individual
Original Assignee
Individual
Publication date
Priority to DER50428D priority Critical patent/DE378026C/en
Application granted granted Critical
Publication of DE378026C publication Critical patent/DE378026C/en
Expired legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/04Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container
    • B02C17/06Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container with several compartments

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Description

Die Erfindung betrifft ein Mahlverfahren mit stufenweiser Zerkleinerung des Mahlgutes in in einem Mahlgehäuse angeordneten, aber voneinander getrennten Vor- und Feinmahlkammern, bei welchem das Mahlgut aus jeder Zerkleinerungsstufe einer von der Mühle getrennten Sichtvorrichtung zur Ausscheidung des Feinmehls und von hier das Siebgrobe wieder der Mühle zugeführt wird. Die Erfindung besteht ίο darin, daß die Sichtrückstände, die über eine Siebvorrichtung geführt werden, je nach ihrer Korngröße teils zur Vor-, teils zur Feinkammer zurückgeleitet werden.The invention relates to a grinding process with gradual comminution of the ground material in in pre-grinding and fine grinding chambers arranged in a grinding housing but separated from each other, in which the ground material from each grinding stage is separated from the mill Sighting device for separating the fine flour and from here the coarse sieve again Mill is fed. The invention consists ίο that the visual residues that have a Sieving device are guided, depending on their grain size, partly to the advantage, partly to the fine chamber be returned.

Gegenüber den bekannten Mahlverfahren mit stufenweiser Zerkleinerung des Mahlgutes in mehreren Mahlkammern, unterscheidet sich das neue Verfahren vorteilhaft durch einen günstigen Wirkungsgrad, da die Vermahlung in den einzelnen Kammern bei jedem Durchgang nur so weit stattfindet, als es für die wirtschaftliche Vermahlung am günstigsten ist. Dies ist der Fall, wenn das Gut beim Austritt aus der Kammer etwa 10 Prozent Feinmehl enthält. Das neue Verfahren gestattet auch einen besonders einfachen und übersichtlichen Aufbau der Mühle mit den erforderlichen Sieb- und Rückführvorrichtungen. Compared to the known grinding process with gradual comminution of the ground material in several grinding chambers, the new process is advantageously distinguished by a favorable one Efficiency, as the grinding in the individual chambers is only so with each pass takes place far than is most favorable for economical grinding. this is the This is the case when the material contains around 10 percent fine flour when it leaves the chamber. That new methods also allow a particularly simple and clear structure of the mill with the necessary screening and return devices.

Die Sichtung des Siebfeinen getrennt von der Mühle, gestattet den Ausbau der Sichtvorrichtung derart, daß damit ein Vielfaches der Mühlenleistung abgesichtet werden kann.The sifting of the fine sieve separately from the mill allows the sifting device to be removed in such a way that a multiple of the mill output can be trimmed with it.

Auf der Zeichnung jst das Schema einer Zweikammermühle zur Ausübung des neuen Verfahrens dargestellt.The drawing shows the scheme of a two-chamber mill for carrying out the new process shown.

Eine drehbar gelagerte Trommel, die an den Stirnseiten mit zentral angeordneten Rohrstutzen für die Aufgabe des Mahlgutes versehen ist, ist durch Wände b und g in zwei Kammern a und f geteilt, in denen die Vermahlung stattfindet, und zwar in der Kammer α die Vormahlung, in der Kammer f die Nachmahlung. Die Wände b und g sind siebartig ausgebildet, so daß das Mahlgut bei einem gewissen Grad der Zerkleinerung in den von den Wänden b undg eingeschlossenen Raum gelangen kann, von dem aus es durch öffnung c in den Siebmantel d und von dort in eine Sichtvorrichtung, z. B. einen Windsichter, gelangt. In der Sichtvorrichtung c wird das Feinmehl abgeschieden, und die Rückstände werden wieder, nachdem sie zweckmäßig eine Sortiervorrichtung h durchlaufen haben, der Vormahlkammer α oder der Nachmahlkammer f zugeleitet. Das Mahlgut durchläuft also bis zu seiner vollständigen Vermahlung einen immerwährenden Kreislauf. Es wird nicht in einem Durchgang bis zur vollständigen Mahlfeinheit vermählen, sondern in jeder der Mahlkammern wird die Vermahlung immer nur so weit getrieben, wie es für die wirtschaftliche Vermahlung am günstigsten ist.A rotatably mounted drum, which is provided with centrally arranged pipe sockets on the front sides for the feed of the ground material, is divided by walls b and g into two chambers a and f , in which the grinding takes place, namely in chamber α the pre-grinding, in chamber f the post-grinding. The walls b and g are formed like a sieve so that the material to be ground can pass with a certain degree of comminution in the b of the walls andg enclosed space, i.e. from which it through port C to the basket and from there to a visual device, such . B. an air separator, arrives. The fine meal is separated in the separating device c , and the residues are again fed to the pre-grinding chamber α or the post-grinding chamber f after they have expediently passed through a sorting device h. The ground material runs through a perpetual cycle until it is completely ground. It is not ground in one pass until it is completely fineness, but in each of the grinding chambers the grinding is only carried out as far as is most favorable for economical grinding.

Claims (1)

P ATENT-An Spruch:P ATENT claim: Mahlverfahren mit stufenweiser Zerkleinerung des Mahlgutes in in einem Mahlgehäuse angeordneten, aber voneinander getrennten Vor- und Feinmahlkammern, bei welchem das Mahlgut aus jeder Zerkleinerungsstufe einer von der Mühle getrennten Sichtvorrichtung zur Ausscheidung des Feinmehls und von hier das Siebgrob wieder der Mühle zugeführt wird, dadurch gekennzeichnet, daß die Sichtrückstände, die über eine Siebvorrichtung geführt werden, je nach ihrer Korngröße teils zur Vor-, teils zur Feinkammer zurückgeleitet werden.Grinding process with gradual comminution of the ground material in a grinding housing arranged but separate pre- and fine grinding chambers, in which the ground material from each grinding stage a separator separated from the mill for separating the fine flour and from here the coarse sieve back to the mill is fed, characterized in that the visual residues, which are passed through a sieve device are guided, depending on their grain size, partly to the advantage, partly to the fine chamber. Hierzu i Blatt Zeichnungen.For this purpose i sheet of drawings.
DER50428D Milling process with step-by-step comminution of the material to be ground in the pre-grinding and fine grinding chambers arranged in a grinding housing, but separated from one another Expired DE378026C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER50428D DE378026C (en) Milling process with step-by-step comminution of the material to be ground in the pre-grinding and fine grinding chambers arranged in a grinding housing, but separated from one another

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER50428D DE378026C (en) Milling process with step-by-step comminution of the material to be ground in the pre-grinding and fine grinding chambers arranged in a grinding housing, but separated from one another

Publications (1)

Publication Number Publication Date
DE378026C true DE378026C (en) 1923-07-04

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Family Applications (1)

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DER50428D Expired DE378026C (en) Milling process with step-by-step comminution of the material to be ground in the pre-grinding and fine grinding chambers arranged in a grinding housing, but separated from one another

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DE (1) DE378026C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE956826C (en) * 1944-06-10 1957-01-24 Miag Muehlenbau & Ind Gmbh Grinding plant for grist containing iron granules
EP0193033A3 (en) * 1985-02-23 1988-04-13 Klockner-Humboldt-Deutz Aktiengesellschaft Grinding and milling device for brittle material to be ground, such as cement clinker, ore, coal or the like
EP1655074A2 (en) 2004-11-09 2006-05-10 Polysius AG Tube mill with at least a pilot chamber and a lifting device
US7073737B2 (en) 2001-11-29 2006-07-11 Polysius Ag Tube grinder and method for comminuting lumpy grinding stock

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE956826C (en) * 1944-06-10 1957-01-24 Miag Muehlenbau & Ind Gmbh Grinding plant for grist containing iron granules
EP0193033A3 (en) * 1985-02-23 1988-04-13 Klockner-Humboldt-Deutz Aktiengesellschaft Grinding and milling device for brittle material to be ground, such as cement clinker, ore, coal or the like
US7073737B2 (en) 2001-11-29 2006-07-11 Polysius Ag Tube grinder and method for comminuting lumpy grinding stock
EP1655074A2 (en) 2004-11-09 2006-05-10 Polysius AG Tube mill with at least a pilot chamber and a lifting device
DE102004054088A1 (en) * 2004-11-09 2006-05-11 Polysius Ag tube mill

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