DE825670C - Process for the improvement of molded bodies made from burned coal - Google Patents
Process for the improvement of molded bodies made from burned coalInfo
- Publication number
- DE825670C DE825670C DEP46559A DEP0046559A DE825670C DE 825670 C DE825670 C DE 825670C DE P46559 A DEP46559 A DE P46559A DE P0046559 A DEP0046559 A DE P0046559A DE 825670 C DE825670 C DE 825670C
- Authority
- DE
- Germany
- Prior art keywords
- improvement
- molded bodies
- bodies made
- burned coal
- carbonyl
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
- C04B35/528—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components
- C04B35/532—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components containing a carbonisable binder
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
Description
Verfahren zur Verbesserung von Formkörpern aus gebrannter Kohle Formkörper aus Kohle finden @in der Industrie vielseitige Anwendung, sei es als Elektroden in der Elektrochemie oder als Baustoffe im Apparatebau. Sie werden im allgemeinen aus heiß verformten Mischungen von Kokspulver und einem pech- oder teerhaltigen Bindemittel, die durch anschließende Erhitzung unter Verkokung des Bindemittels verfestigt werden, gewonnen.Process for improving moldings made from burnt charcoal Moldings made of coal are used in many different ways in industry, be it as electrodes in electrochemistry or as building materials in apparatus engineering. You will in general from hot-formed mixtures of coke powder and a pitch or tar-containing one Binder made by subsequent heating with coking of the binder are solidified, won.
Die Eigenschaften der so erhaltenen sogenannten gebrannten amorphen Kohlen sind weitgehend von der Auswahl der Rohmaterialien und den Herstellungsbedingungen, z. B. Druck und Temperatur, bei denen die Verformung vorgenommen wird, abhängig. Zur Erzielung einer hohen mechanischen Festigkeit sowie einer möglichst geringen Reaktionsfähigkeit mit Luft oder Sauerstoff sind dichte, wenig poröse Erzeugnisse erwünscht. Es wurde gefunden, daß der Zusatz von Eisencarbonyl zu der Mischung von Kokspulver und Bindemittel, der sogenannten grünen Masse, sich in dieser Beziehung ganz besonders günstig auswirkt. Man geht zweckmäßig so vor, daß man das Eisencarbonyl, für sich oder in etwa der gleichen Menge eines geeigneten Maschinenöles aufgelöst, dem in der Mischmaschine befindlichen Kokspulver zugibt. Dieses kann hierbei bereits auf etwa 5o° C angewärmt sein. Ebenso kann das Ül-Carbonyl-Gemisch zur besseren Homogenisierung bzw. Lösung des Carbonyls auf 45° C, keinesfalls aber höher, angewärmt werden. Es wird nun sofort, bevor nennenswerte Verluste des Kohlenoxyds durch Verdampfung oder Zersetzung eintreten können, das als Bindemittel für die fertige grüne Masse dienende Pech in flüssiger Form zugegossen und in der üblichen Weise weitergemischt. Weniger zweckmäßig ist es, das Carbonyl dem Pech zuzusetzen, da hierdurch starkes Schäumen infolge der beginnenden Zersetzung des Carbonyls eintritt. Im Gegensatz zu anderen als Kondensationsmittel wirkenden Stoffen, wie Eisenchlorid, Aluminiumchlorid oder Benzotrichlorid, erhöht das Eisencarbonyl den Erweichungspunkt des Bindemittels nicht, so daß die Verformbarkeit der warmen Kohle-Pech-Mischung auf der Presse nicht erschwert wird. Im Gegenteil wird der Erweichungspunkt des Peches, verglichen mit dem des carbonylfreien, um wenige Grad C heruntergedrückt und die Geschmeidigkeit der grünen Masse erhöht.The properties of the so-called fired amorphous Coals are largely dependent on the choice of raw materials and manufacturing conditions, z. B. pressure and temperature at which the deformation is carried out, dependent. To achieve a high mechanical strength as well as the lowest possible Reactivity with air or oxygen are dense, less porous products he wishes. It has been found that the addition of iron carbonyl to the mixture of Coke powder and binder, the so-called green mass, differ in this regard has a particularly beneficial effect. It is advisable to proceed in such a way that the iron carbonyl, dissolved individually or in approximately the same amount of a suitable machine oil, added to the coke powder in the mixer. This can already be done here be warmed to about 50 ° C. Likewise, the oil carbonyl mixture can be used for better Homogenization or dissolution of the carbonyl to 45 ° C, but never higher, warmed will. It is now immediately before any appreciable loss of carbon dioxide by evaporation or decomposition can occur, acting as a binder for the finished green mass serving pitch poured in liquid form and in the usual way further mixed. It is less useful to add the carbonyl to the pitch, since as a result, strong foaming occurs as a result of the incipient decomposition of the carbonyl. In contrast to other substances that act as condensation agents, such as ferric chloride, Aluminum chloride or benzotrichloride, the iron carbonyl increases the softening point of the binder not, so that the deformability of the warm coal-pitch mixture is not made difficult in the press. On the contrary, the softening point of the Pitch, compared with that of the carbonyl-free one, was reduced by a few degrees C. and increases the suppleness of the green mass.
Nach dem Brennen erwiesen sich die mit Eisencarbonylzusatz hergestellten Kohlen als ganz besonders dicht und fest. Auch der Verkokungsrückstand des Bindemittels liegt sehr hoch. Es konnte aus Formstücken, die in grünem Zustand eine Dichte von 475 bis 1,77 aufwiesen, fertig gebrannte amorphe Kohle gewonnen werden, deren Dichte nur unwesentlich niedriger (etwa 1,73) lag. Die Sehwindung liegt hierbei in den üblichen Grenzen von etwa I bis 2%.After burning, the coals made with the addition of iron carbonyl turned out to be particularly dense and solid. The coking residue in the binder is also very high. It was possible to obtain completely burned amorphous coal from shaped pieces that had a density of 475 to 1.77 in the green state, the density of which was only slightly lower (about 1.73) . The curvature of vision is within the usual limits of about 1 to 2%.
Auch die in bekannter Weise aus den amorphen Kohlekörpern hergestellten Graphitkörper zeigen die gleich hohe Dichte.Also those produced in a known manner from the amorphous carbon bodies Graphite bodies show the same high density.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP46559A DE825670C (en) | 1949-06-22 | 1949-06-22 | Process for the improvement of molded bodies made from burned coal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP46559A DE825670C (en) | 1949-06-22 | 1949-06-22 | Process for the improvement of molded bodies made from burned coal |
Publications (1)
Publication Number | Publication Date |
---|---|
DE825670C true DE825670C (en) | 1951-12-20 |
Family
ID=7381795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEP46559A Expired DE825670C (en) | 1949-06-22 | 1949-06-22 | Process for the improvement of molded bodies made from burned coal |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE825670C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1018347B (en) * | 1956-02-07 | 1957-10-24 | Hoechst Ag | Process for the production of carbon and graphite molded bodies, such as electrodes |
DE1072914B (en) * | 1960-01-07 | Schunk &. Ebe G.m.b.H., Heuchelheim über Gießen | Process for introducing pure metals in extremely fine distribution into carbon bodies | |
EP0163597A1 (en) * | 1984-04-27 | 1985-12-04 | Schweizerische Aluminium Ag | Process for diminution of the tendency towards oxidation at increased temperatures of carbon powders or of shaped carbon articles fabricated by using the afore-mentioned carbon powder |
-
1949
- 1949-06-22 DE DEP46559A patent/DE825670C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1072914B (en) * | 1960-01-07 | Schunk &. Ebe G.m.b.H., Heuchelheim über Gießen | Process for introducing pure metals in extremely fine distribution into carbon bodies | |
DE1018347B (en) * | 1956-02-07 | 1957-10-24 | Hoechst Ag | Process for the production of carbon and graphite molded bodies, such as electrodes |
EP0163597A1 (en) * | 1984-04-27 | 1985-12-04 | Schweizerische Aluminium Ag | Process for diminution of the tendency towards oxidation at increased temperatures of carbon powders or of shaped carbon articles fabricated by using the afore-mentioned carbon powder |
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