DE638800C - Method and device for firing plaster of paris - Google Patents
Method and device for firing plaster of parisInfo
- Publication number
- DE638800C DE638800C DEK140464D DEK0140464D DE638800C DE 638800 C DE638800 C DE 638800C DE K140464 D DEK140464 D DE K140464D DE K0140464 D DEK0140464 D DE K0140464D DE 638800 C DE638800 C DE 638800C
- Authority
- DE
- Germany
- Prior art keywords
- mill
- plaster
- paris
- semolina
- firing
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/02—Methods and apparatus for dehydrating gypsum
- C04B11/028—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Bei der Herstellung von Gips wird das Rohgut vielfach während des Mahlens bis auf höchstens i8o° erhitzt. Stuckgips muß aber einen gewissen Teil von überbranntem Gips enthalten, damit er nicht gar zu schnell abbindet. Nach, der Erfindung wird dieser überbrannte Gips in der Weise gewonnen, daß in einem einzigen Arbeitsgang aus dem Gemahlenen die gröberen Teile ausgeschieden und ganz oder teilweise höher, bis auf etwa Soo°, erhitzt werden, worauf sie zur nochmaligen Mahlung dem Frischgut wieder beigemengt werden. >In the production of plaster of paris, the raw material is often up during the grinding heated to a maximum of 180 °. Plaster of paris must but contain a certain amount of burnt plaster so that it doesn't go too fast sets. According to the invention, this plaster of paris is obtained in such a way that The coarser parts are separated from the ground in a single operation and completely or partially higher, up to about Soo °, are heated, whereupon they are used again Grinding can be added back to the fresh material. >
Das Überbrennen gröberer Körner hat sich als vorteilhafter erwiesen als dasjenige feinen Mehles, weil der die Mühle durchströmende Wind das Mehl leicht zum Teil mitreißt, so daß es schwierig ist, die in 'das Frischgut gelangende Menge an überbranntem Gips rich.-tig zu bemessen. Grieße werden nicht so leicht mit fortgerissen, und es kann daher stets damit gerechnet werden, daß die durch die zum Überbrennen dienende Vorrichtung geführten Grieße auch, vollständig· in das herzustellende Erzeugnis gelangen.The overburning of coarser grains has proven to be more advantageous than that of fine ones Flour, because the wind flowing through the mill easily carries some of the flour with it, like this that it is difficult to correctly measure the amount of plaster of paris that has got into the fresh material to measure. Semolina is not carried away so easily, and so it can always be carried out with it be expected that the passed through the device used for overburning Also semolina, completely · get into the product to be manufactured.
Die Erfindung betrifft ferner eine Vorrichtung zur Durchführung des vorbeschriebenen Verfahrens mit einer von warmer Luft durchspülten Trommelmühle für das Rohgut, einem an die Mühle angeschlossenen Sichter zur Abscheidung der Grieße aus dem Mehl und einem von heißen Gasen von unten nach oben durchspülten Zickzackschacht, durch den die Grieße, bevor sie nochmals der Mühle zugeführt werden, ganz oder zum Teil abwärts rieseln.The invention also relates to a device for performing the above Process with a drum mill flushed with warm air for the raw material, a Sifter connected to the mill for separating the semolina from the flour and a zigzag shaft flushed from bottom to top by hot gases through which the semolina, before being fed back into the mill, all or part of it downwards trickle.
Die Zeichnung stellt ein Ausführungsbeispiel einer solchen Vorrichtung dar.The drawing shows an embodiment of such a device.
Das Frischgut wird durch die Leitung 1 in die Mühle 2 aufgegeben, in welche mittels der Leitung 3 ein Strom heißer Luft eingeführt wird. Das Gemahlene wird von der abziehenden Luft durch die Leitung 4 in den Sichter 5 ausgetragen und gelangt nach AbScheidung der Grieße in den Staubfang 6, in *·> dem es gesammelt wird.The fresh goods are conveyed through line 1 abandoned in the mill 2, in which by means of the line 3 a stream of hot air is introduced will. The ground is discharged by the air that is drawn off through the line 4 into the classifier 5 and arrives after separation the semolina in the dust catcher 6, in * ·> which it is collected.
Die im Sichter 5 ausgeschiedenen Grieße rieseln durch, die Leitung 7 abwärts und werden mittels der Verteilklappe 8 entweder unmittelbar durch die Leitung 9 der Frischgutaufgäbe 1 wieder zugeführt oder durch die Leitung 10 in den Schacht 11 geleitet.The grits separated in the classifier 5 trickle through, the line 7 downwards and become by means of the distribution flap 8 either directly through the line 9 of the Frischgutaufgäbe 1 supplied again or passed through the line 10 into the shaft 11.
Der Schacht 11 ist mit Einbauten 12 versehen, so daß die Grieße in einem Zickzackweg abwärts rieseln. Durch die Zuleitung 13 wird Heißluft von unten her in den Schacht eingeblasen, um ihn durch die Ableitung 14 zu verlassen.The shaft 11 is provided with fixtures 12, so that the semolina trickles downwards in a zigzag path. Through the feed line 13 hot air is blown into the shaft from below in order to pass it through the discharge line 14 to leave.
Die zur Anwendung gelangenden Temperaturen können beispielsweise so gestaffelt sein, daß in der Mühle 2 eine Temperatur von höchstens i8o° herrscht, während in dem Schacht 11 eine solche bis zu 8oo° aufrechterhalten wird.The temperatures used can be staggered, for example, that in the mill 2 there is a temperature of not more than 180 °, while in the Shaft 11 maintains this up to 8oo ° will.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK140464D DE638800C (en) | Method and device for firing plaster of paris |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK140464D DE638800C (en) | Method and device for firing plaster of paris |
Publications (1)
Publication Number | Publication Date |
---|---|
DE638800C true DE638800C (en) | 1936-11-23 |
Family
ID=7249674
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEK140464D Expired DE638800C (en) | Method and device for firing plaster of paris |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE638800C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2679316A (en) * | 1949-03-17 | 1954-05-25 | Jaruza A G Chur Soc | Apparatus for drying and separating dust from crushed or comminuted materials |
DE967512C (en) * | 1950-03-01 | 1957-11-14 | Anna Minna Agnes Karnstedt Geb | Process for the production of an anhydrite-based binder for building materials |
DE3537049A1 (en) * | 1985-10-17 | 1987-04-23 | Krupp Polysius Ag | METHOD AND SYSTEM FOR THE PRODUCTION OF SS-HALBHYDRATE PLASTER |
-
0
- DE DEK140464D patent/DE638800C/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2679316A (en) * | 1949-03-17 | 1954-05-25 | Jaruza A G Chur Soc | Apparatus for drying and separating dust from crushed or comminuted materials |
DE967512C (en) * | 1950-03-01 | 1957-11-14 | Anna Minna Agnes Karnstedt Geb | Process for the production of an anhydrite-based binder for building materials |
DE3537049A1 (en) * | 1985-10-17 | 1987-04-23 | Krupp Polysius Ag | METHOD AND SYSTEM FOR THE PRODUCTION OF SS-HALBHYDRATE PLASTER |
FR2588854A1 (en) * | 1985-10-17 | 1987-04-24 | Krupp Polysius Ag | Beta calcium sulphate hemi:hydrate prodn. by grinding and calcination |
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