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 substancesInfo
- 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
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)
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)
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)
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 |
-
1953
- 1953-07-22 DE DEF12414A patent/DE945086C/en not_active Expired
Patent Citations (4)
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)
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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