DE945086C - Process for coating the individual particles of powdery, preferably agglomerated or agglomerating substances - Google Patents

Process for coating the individual particles of powdery, preferably agglomerated or agglomerating substances

Info

Publication number
DE945086C
DE945086C DEF12414A DEF0012414A DE945086C DE 945086 C DE945086 C DE 945086C DE F12414 A DEF12414 A DE F12414A DE F0012414 A DEF0012414 A DE F0012414A DE 945086 C DE945086 C DE 945086C
Authority
DE
Germany
Prior art keywords
coating
powdery
individual particles
mixing
substances
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
DEF12414A
Other languages
German (de)
Inventor
Dipl-Ing Rudolf Erdmenger
Otto Telle
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.)
Bayer AG
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Priority to DEF12414A priority Critical patent/DE945086C/en
Application granted granted Critical
Publication of DE945086C publication Critical patent/DE945086C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/003—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic followed by coating of the granules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/73—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with rotary discs
    • B01F27/731—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with rotary discs with two or more parallel shafts provided with perpendicularly mounted discs, e.g. lens shaped, one against the other on each shaft and in circumferential contact with the discs on the other shafts, e.g. for cleaning

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Glanulating (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Überziehen der Einzelteilchen von pulverförmigen, vorzugsweise agglomerierten oder zur Agglomerierung neigenden Stoffen durch Mischen mit einem kristallinen Überzugsstoff in einer mit einem Heizmantel versehen Mischschnecke unter Airfschmelzen des Überzuges während des Misch-Vorganges. The invention relates to a method for coating the individual particles of powdery, preferably agglomerated or prone to agglomeration Fabrics by mixing with a crystalline coating fabric in one with a heating mantle provided mixing screw with air melting of the coating during the mixing process.

Es ist bereits ein Verfahren bekannt, bei dem pulverförmige Stoffe unter Erwärmung mit kristallwasserhaltigen Salzen in einem Drehrohr gemischt werden, woblei diese kristallinen Stoffe schmelzen und die mit dem kristallinen Stoff überzogenen Verfahrensprodukte als pulverförmige Substanz anfallen. Dieser auf einer Art Schaufelwirkung beruhende Mischeffekt ist aber insbesondere für Produkte, die zur Agglomerierung neigen oder bereits agglomeriert vorliegen, nicht geeignet, wenn mit Sicherheit jedes einzelne Feststoffteilchen dragiert werden soll. A method is already known in which pulverulent substances are mixed while being heated with salts containing water of crystallization in a rotary kiln, whereby these crystalline substances melt and those coated with the crystalline substance Process products are obtained as a powdery substance. This one on a kind of scooping effect based mixing effect is especially for products that agglomerate tend or are already agglomerated, not suitable if with certainty every single solid particle is to be coated.

Gemäß der Erfindung wird dieser Mangel behoben durch die Verwendung einer mehrspindeligen Mischschnecke mit auf jeder der gleichsinnig umlauf enden Achsen wendeltreppenartig gegeneinander versetzt angeordneten runden Exzenterscheiben, die sich am Gehäuse und gegenseitig vollständig abstreifen. Eine derartige an sich bereits bekannte Vorrichtug gewährleistet infolge inrer mahlenden Wirkung die Dragierung jedes einzelnen Staubteilchens. Eine Agglomerierung oder Granulierung der Stäube wird durch den stoffzerkleinernden Mischvorgang in der Vorrichtung mit Sicherheit verhindert. Das Ergebnis ist bei entsprechender Wahl der Überzugsstoffes eine höchst aktive pulverförmige Substanz. According to the invention, this deficiency is remedied by the use a multi-spindle mixing screw with each end rotating in the same direction Axes offset from each other in a spiral staircase, round eccentric disks, which completely strip off on the housing and on each other. Such a thing in itself already known device ensures the coating due to its grinding effect of every single dust particle. Agglomeration or granulation of the dusts is guaranteed by the pulverizing mixing process in the device prevented. With the right choice of cover material, the result is excellent active powdery substance.

Die Wirkung dieser Schnecken ist schon bei werhältnismäßig niedrigen Drehzhlen sehr intensiv, und das gegenseitige Abstreifen vermeidet in der Schneckenvorrichtung das Zurückbleiben von toten Stoffnestern. The effect of these snails is already relatively low Very intensive speed counting, and the mutual scraping is avoided in the screw device the remaining of dead fabric nests.

Das Verfahren hat sich beispielsweise besonders bewährt zum Überziehen von Kaolin, Talkum od. dgl. mit Pflanzenschutzwirkstoffen. Auch kann man das lästige Stäuben von Stoffen mit Hilfe der angegebenen Überzugsmethode mit Erfolg stark herabsetzen und damit die weitere Verarbeitung dieser Stoffe erleichtern. The method has proven particularly useful for covering, for example of kaolin, talc or the like with crop protection agents. You can also do the annoying Reduce dusting of materials with the help of the specified coating method with success and thus facilitate the further processing of these substances.

In der Zeichnung ist ein Ausführungsbeispiel einer Vorrichtung zur Ausführung des Verfahrens schematisch dargestellt. In the drawing is an embodiment of a device for Execution of the method shown schematically.

Abb. 1 ist ein Längsschnitt, Abb. 2 ein Querschnitt durch eine Schneckenvorrichtung. Fig. 1 is a longitudinal section, Fig. 2 is a cross section through a screw device.

Den im Gehäuse 1 in gleichem Drehsinn umlaufenden Schneckenkörpern 2 und 3, die aus auf der Welle wendeltreppenartig angeordneten Exzenterscheiben b (Abb. 2) bestehen können, wird durch den Trichter 4 der zu überziehende Trockenstoff und bei 5 eine bestimmte Menge des Überzugsstoffes in kristallinem Zustand zugeführt. Das mit der Vernisohung der beiden Stoffe vor sich gehende Aufschmelzen des Überzugsgutes wird durch Wärme bewirkt, die mittels eines durch den heizmantelraum 6 strömenden Heizmittels zugeführt wird. Die Teilchen des zu überziehenden trockenen Grund. stoffes werden innerhalb der Schneckenvorrichtung vom geschmolzenen Üblerzugsstoff umhüllt. Außerhalb der Wärmezone der Vorrichtung tritt dann eine Erstarrung der Umhüllung ein. The worm bodies rotating in the same direction of rotation in the housing 1 2 and 3, the eccentric disks arranged like a spiral staircase on the shaft b (Fig. 2), the drying material to be coated is fed through the funnel 4 and at 5 a certain amount of the coating material is supplied in the crystalline state. The melting of the coating material that takes place with the Vernisohung of the two substances is brought about by heat generated by means of a flowing through the heating jacket space 6 Heating medium is supplied. The particles of the dry ground to be coated. fabric are encased within the screw device by the molten pull material. The casing then solidifies outside the heat zone of the device a.

Claims (1)

PATENTANSPRUCH : Verfahren zum Überziehen der Einzelteilchen von pulverförmigen, vorzugsweise afgglomerierten oder zur Agglomerierung neigenden Stoffen durch Mischen mit einem kristalimen Überzugsstoff in einer mit einem Heizmantel versehenen Mischschnecke unter Aufschmelzen des Überzugsstoffes während des Mischvorganges, gekennzeichnet durch die Verwendug einer mehrspindeligen Mischschnecke mit auf jeder der gleichsinnig umlaufenden Achsen wendeltreppenartig gegeneinander versetzt angeordneten runden Exzenterscheiben, die sich am Gehäuse und gegenseitig vollständig abstreifer. Claim: Method for coating the individual particles of powdery, preferably agglomerated or agglomeration-prone substances by mixing with a crystalline coating material in one with a heating mantle provided mixing screw with melting of the coating material during the mixing process, characterized by the use of a multi-spindle mixing screw with on each of the axes rotating in the same direction are arranged offset from one another like a spiral staircase round eccentric discs that completely wipe each other on the housing and each other. Angezogene Druckschriften: Britische Patentschriften Nr. 637 212, 654272; deutsche Patentschriften Nr. 813 154, 838 596. Referenced Documents: British Patent Specification No. 637 212, 654272; German patents No. 813 154, 838 596.
DEF12414A 1953-07-22 1953-07-22 Process for coating the individual particles of powdery, preferably agglomerated or agglomerating substances Expired DE945086C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEF12414A DE945086C (en) 1953-07-22 1953-07-22 Process for coating the individual particles of powdery, preferably agglomerated or agglomerating substances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF12414A DE945086C (en) 1953-07-22 1953-07-22 Process for coating the individual particles of powdery, preferably agglomerated or agglomerating substances

Publications (1)

Publication Number Publication Date
DE945086C true DE945086C (en) 1956-06-28

Family

ID=7087002

Family Applications (1)

Application Number Title Priority Date Filing Date
DEF12414A Expired DE945086C (en) 1953-07-22 1953-07-22 Process for coating the individual particles of powdery, preferably agglomerated or agglomerating substances

Country Status (1)

Country Link
DE (1) DE945086C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1111154B (en) * 1960-03-16 1961-07-20 Bayer Ag Device for evaporating volatile components from plastic, elastic or viscous substances
WO1993011085A1 (en) * 1991-11-25 1993-06-10 Carl Schenck Ag Fiber gypsum board and method of manufacturing same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB637212A (en) * 1948-02-26 1950-05-17 Beecham Res Lab Improved process for increasing the bulk density of powdered substances
GB654272A (en) * 1943-07-19 1951-06-13 Monsanto Chemicals Improvements in or relating to the pelleting of finely divided solid substances
DE813154C (en) * 1949-09-29 1951-09-06 Bayer Ag Mixing and kneading device
DE838596C (en) * 1948-10-02 1952-05-12 Ruhrchemie Ag Process and device for the treatment of chemical products

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB654272A (en) * 1943-07-19 1951-06-13 Monsanto Chemicals Improvements in or relating to the pelleting of finely divided solid substances
GB637212A (en) * 1948-02-26 1950-05-17 Beecham Res Lab Improved process for increasing the bulk density of powdered substances
DE838596C (en) * 1948-10-02 1952-05-12 Ruhrchemie Ag Process and device for the treatment of chemical products
DE813154C (en) * 1949-09-29 1951-09-06 Bayer Ag Mixing and kneading device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1111154B (en) * 1960-03-16 1961-07-20 Bayer Ag Device for evaporating volatile components from plastic, elastic or viscous substances
WO1993011085A1 (en) * 1991-11-25 1993-06-10 Carl Schenck Ag Fiber gypsum board and method of manufacturing same

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