DE1053190B - Method and device for roasting sulfidic materials - Google Patents

Method and device for roasting sulfidic materials

Info

Publication number
DE1053190B
DE1053190B DEM28308A DEM0028308A DE1053190B DE 1053190 B DE1053190 B DE 1053190B DE M28308 A DEM28308 A DE M28308A DE M0028308 A DEM0028308 A DE M0028308A DE 1053190 B DE1053190 B DE 1053190B
Authority
DE
Germany
Prior art keywords
roasting
air
cooling air
oven
agitator arms
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.)
Pending
Application number
DEM28308A
Other languages
German (de)
Inventor
Dr Guenter Friese
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.)
GEA Group AG
Original Assignee
Metallgesellschaft 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 Metallgesellschaft AG filed Critical Metallgesellschaft AG
Priority to DEM28308A priority Critical patent/DE1053190B/en
Publication of DE1053190B publication Critical patent/DE1053190B/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/26—Arrangements of heat-exchange apparatus
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/02—Roasting processes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Baking, Grill, Roasting (AREA)

Description

Verfahren und Vorrichtung zum Rösten sulfidischer Materialien In der Hauptpatentanmeldung M 27071 VI/40 a ist ein Verfahren zur Abröstung schwefelhaltiger Materialien im Etagenofen beschrieben, das im wesentlichen darin besteht, die Röstwärme aus dem Ofen selbst abzuführen und vorzugsweise für die Dampferzeugung nutzbar zu machen. Die im Innern des Etagenofens befindlichen wärmeaufnehmenden Organe sind als frei im Innern des Ofens liegende Verdampferrohre ausgebildet und werden von einem flüssigen Kühlmedium durchströmt, welches durch Aufnahme wenigstens eines Teiles der Röstwärme zum Verdampfen gebracht wird.Method and device for roasting sulfidic materials In the Main patent application M 27071 VI / 40 a is a process for roasting sulfur-containing Materials described in the deck oven, which essentially consists in the roasting heat to be discharged from the furnace itself and preferably usable for steam generation do. The heat-absorbing organs located inside the multiple-hearth furnace are designed as evaporator tubes lying freely inside the furnace and are of a liquid cooling medium flows through, which by receiving at least one Part of the roasting heat is made to evaporate.

Erfindungsgemäß werden die nutzbar gemachte Wärmemenge und der Durchsatz durch den Etagenofen dadurch weiter gesteigert, daß die erwärmte Kühlluft, die bei der an sich bekannten Kühlung der Rührarme mittels hindurchgeleiteter Luft anfällt, mittels geeigneter Leitungen und Gasfördereinrichtungen als Röstluft verwendet wird.According to the invention, the amount of heat made usable and the throughput further increased by the multi-deck oven that the heated cooling air that at the known cooling of the agitator arms occurs by means of air passed through, is used as roasting air by means of suitable pipes and gas conveying devices.

Vorzugsweise wird dabei die Kühlluft im Gegensatz zur bisher üblichen Verfahrensweise entgegen ihrem natürlichen Auftrieb durch die Hohlwelle von ohen nach unten zwangsweise hindurebgeführt. Durch diese Umkehrung des Weges der Kühlluft wird aus den obersten, heißesten Etagen Wärme in die unteren Etagen geführt und der Nachteil des Etagenofens, daß nur auf den obersten Etagen die Reaktion mit genügender Geschwindigkeit vor sich geht und auf den untersten Etagen wegen der dort herrschenden niedrigen Temperatur verlangsamt ist, weitgehend ausgeglichen.The cooling air is preferably used in contrast to the previously customary Procedure against their natural buoyancy through the hollow shaft of ohen forced downwards. By reversing the path of the cooling air heat is conducted from the top, hottest floors to the lower floors and the disadvantage of the deck oven that the reaction with sufficient only on the top floors Speed is going on and on the lowest floors because of the prevailing there low temperature is slowed down, largely balanced.

Um die Wärmezufuhr auf dem untersten Boden möglichst gleichmäßig zu gestalten, ist es gemäß einer weiteren Ausführung der Erfindung zweckmäßig, den untersten Boden als Rost auszubilden, durch welchen die vorgewärmte Röstluft in der Weise eingeführt wird, daß sie das auf dem Rost befindliche bereits -weitgehend abgeröstete Gut durchströmen muß.In order to increase the heat supply on the lowest floor as evenly as possible shape, it is useful according to a further embodiment of the invention, the train the lowest floor as a grate, through which the preheated roasting air in is introduced in such a way that it is already largely on the grate must flow through the roasted good.

Eine weitere Ausgestaltung der Erfindung sieht vor, die als Röstluft zu verwendende erwärmte Kühlluft der Rührarme nicht erst aus dem Ofen heraus auszuführen, sondern durch die Rührarme, vorzugsweise durch Austrittsöffnungen, die an den Unterkanten der Rührzähne angebracht sind, direkt in oder auf die Röstgutschicht zu blasen. Das Auf- bzw. Einblasen auf oder in die Schicht der untersten Etage bietet den Vorteil, Wärmeverluste vollständig zu vermeiden und die Abröstgeschwindigkeit in diesen untersten Etagen weiter zu steigern.Another embodiment of the invention provides that as roasting air Do not first run the heated cooling air of the agitator arms to be used out of the furnace, but through the agitator arms, preferably through outlet openings on the lower edges the stirring teeth are attached to blow directly into or on the layer of roasted food. Inflating or blowing in on or into the layer of the lowest floor offers the advantage of To avoid heat losses completely and to reduce the roasting speed in these lowest Floors to increase further.

Claims (2)

PATENTANSPRÜCHE: 1. Verfahren nach Patentanmeldung M 27071 VI/40 a, dadurch gekennzeichnet, daß die bei der an sich bekannten Kühlung der Rührarme mittels hindurchgeleiteter Luft anfallende erwärmte Kühlluft als Röstluft verwendet wird. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Kühlluft von oben nach unten durch die Hohlwelle geleitet wird. 3. Verfahren nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die als Röstluft verwendete Kühlluft durch die Rührarme selbst in oder auf die Röstgutschicht, vorzugsweise der untersten Etage, geblasen wird. 4. Vorrichtung zur Durchführung des Verfahrens nach den Ansprüchen 1 bis 3, bestehend aus einem Etagenofen mit Hohlwelle und hohlen Rührarmen, dadurch gekennzeichnet, daß sie mindestens eine Rohrleitung und eine Gasfördereinrichtung zur Rückführung der erwärmten Kühlluft als Röstluft besitzt. 5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die unterste Etage des Ofens von einem Rost gebildet wird, durch welchen die ganze oder ein Teil der zur Röstung erforderlichen Luft in den Ofen eingeführt werden kann. 6. Vorrichtung zur Durchführung des Verfahrens nach den Ansprüchen 1 bis 3, bestehend aus einem Etagenofen mit Hohlwelle und hohlen Rührarmen, dadurch gekennzeichnet, daß die Rührarme Austrittsöffnungen für die durch sie geführte Kühlluft besitzen. . _ 7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß auch die Austrittsöffnungen für die Kühlluft an der Unterkante der Rührzähne befestigt sind. In Betracht gezogene Druckschriften: Deutsche Patentschriften Nr. 635 028, 871516-; österreichische Patentschrift Nr. 76 017; V. Todel, Lehrbuch der Metallhüttenkunde, Bd. PATENT CLAIMS: 1. Method according to patent application M 27071 VI / 40 a, characterized in that the heated cooling air produced during the known cooling of the agitator arms by means of air passed through is used as roasting air. 2. The method according to claim 1, characterized in that the cooling air is passed from top to bottom through the hollow shaft. 3. The method according to claims 1 and 2, characterized in that the cooling air used as roasting air is blown through the agitator arms itself in or on the roasting material layer, preferably the lowest level. 4. Apparatus for performing the method according to claims 1 to 3, consisting of a deck oven with a hollow shaft and hollow stirring arms, characterized in that it has at least one pipe and a gas conveyor for returning the heated cooling air as roasting air. 5. Apparatus according to claim 4, characterized in that the lowest tier of the oven is formed by a grate through which all or part of the air required for roasting can be introduced into the oven. 6. Apparatus for performing the method according to claims 1 to 3, consisting of a deck oven with a hollow shaft and hollow agitator arms, characterized in that the agitator arms have outlet openings for the cooling air guided through them. . _ 7. Apparatus according to claim 6, characterized in that the outlet openings for the cooling air are also attached to the lower edge of the stirring teeth. Considered publications: German Patent Specifications No. 635 028, 871516-; Austrian Patent No. 76 017; V. Todel, Textbook of Metallurgy, Vol. 2, Leipzig, 1953, S. 425.2, Leipzig, 1953, p. 425.
DEM28308A 1955-09-23 1955-09-23 Method and device for roasting sulfidic materials Pending DE1053190B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM28308A DE1053190B (en) 1955-09-23 1955-09-23 Method and device for roasting sulfidic materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM28308A DE1053190B (en) 1955-09-23 1955-09-23 Method and device for roasting sulfidic materials

Publications (1)

Publication Number Publication Date
DE1053190B true DE1053190B (en) 1959-03-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEM28308A Pending DE1053190B (en) 1955-09-23 1955-09-23 Method and device for roasting sulfidic materials

Country Status (1)

Country Link
DE (1) DE1053190B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT76017B (en) * 1913-12-17 1919-04-10 Hermann Berstoff Maschb Anstal Device for coating materials with a volatile hydrocarbon-containing mass.
DE635028C (en) * 1932-10-19 1936-09-10 Mueller Wilhelm Roestofen
DE871516C (en) * 1943-01-16 1953-03-23 Alfons Dr Zieren Agitator for mechanical roasting stoves

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT76017B (en) * 1913-12-17 1919-04-10 Hermann Berstoff Maschb Anstal Device for coating materials with a volatile hydrocarbon-containing mass.
DE635028C (en) * 1932-10-19 1936-09-10 Mueller Wilhelm Roestofen
DE871516C (en) * 1943-01-16 1953-03-23 Alfons Dr Zieren Agitator for mechanical roasting stoves

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