DE263653C - - Google Patents

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Publication number
DE263653C
DE263653C DENDAT263653D DE263653DA DE263653C DE 263653 C DE263653 C DE 263653C DE NDAT263653 D DENDAT263653 D DE NDAT263653D DE 263653D A DE263653D A DE 263653DA DE 263653 C DE263653 C DE 263653C
Authority
DE
Germany
Prior art keywords
grinding
graphite crucible
graphite
pairs
rollers
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.)
Active
Application number
DENDAT263653D
Other languages
German (de)
Publication of DE263653C publication Critical patent/DE263653C/de
Active legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00Carbon; Compounds thereof

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Crushing And Grinding (AREA)

Description

BERLIN. GEDRUCKT IN DER REICHSDRUCKEREI.BERLIN. PRINTED IN THE REICHSDRUCKEREI.

Claims (2)

Patent-Ansprüche: 40 45Patent Claims: 40 45 1. Verfahren zur Wiedergewinnung des Graphits aus den Scherben unbrauchbar gewordener Graphittiegel, dadurch gekennzeichnet, daß die Graphittiegelscherben vier bis zwölf Stunden der Wirkung von Schwefel-, Salz-, Salpetersäure oder einer diesen in ihrer Wirkung gleichkommenden Säure ausgesetzt, alsdann in öfen oder Retorten bei Rotglut ausgeglüht und auf Brechwalzen mit daran sich anschließenden Siebwerken von den ihnen anhaftenden Schlackenteilen befreit werden, worauf ihre Vermahlung in den verschiedenen Feinheitsgraden auf einer großen Anzahl von mit gleicher Geschwindigkeit umlaufenden Walzenpaaren mit Zwischenschaltung von Sieben bewirkt wird.1. Method of recovering the graphite from the cullet is unusable graphite crucible, characterized in that the graphite crucible shards four to twelve hours of the action of sulfuric, hydrochloric, nitric acid or one exposed to these acids, which have the same effect, then in ovens or Retorts annealed in red heat and on crushing rollers with subsequent ones Sieving works are freed from the slag parts adhering to them, whereupon their grinding in the various Degrees of fineness on a large number of rotating at the same speed Roller pairs with the interposition of sieves is effected. 2. Zu dem Verfahren nach Anspruch 1 die Verwendung von Mahlwalzenpaaren, deren eine Walze keinerlei Antrieb erhält, sondern nur durch Mahlreibung mitgenommen wird, um auch die geringste Differenz in den Geschwindigkeiten der Walzen unter sich zu vermeiden.2. To the method according to claim 1, the use of pairs of grinding rollers, one roller of which does not receive any drive, but is only taken along by grinding friction will make even the slightest difference in the speeds of the Avoid rolling under them.
DENDAT263653D Active DE263653C (en)

Publications (1)

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DE263653C true DE263653C (en)

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DE (1) DE263653C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6720025B2 (en) 2002-07-01 2004-04-13 3M Innovative Properties Company Slot extrusion coating methods

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6720025B2 (en) 2002-07-01 2004-04-13 3M Innovative Properties Company Slot extrusion coating methods

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