DE297244C - - Google Patents
Info
- Publication number
- DE297244C DE297244C DENDAT297244D DE297244DA DE297244C DE 297244 C DE297244 C DE 297244C DE NDAT297244 D DENDAT297244 D DE NDAT297244D DE 297244D A DE297244D A DE 297244DA DE 297244 C DE297244 C DE 297244C
- Authority
- DE
- Germany
- Prior art keywords
- carbon
- bath
- pig iron
- coating
- rich
- 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
Links
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000005255 carburizing Methods 0.000 claims description 4
- 239000011253 protective coating Substances 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 229910052799 carbon Inorganic materials 0.000 description 10
- 229910000805 Pig iron Inorganic materials 0.000 description 5
- 229910000499 pig iron Inorganic materials 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000571 coke Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 241000131971 Bradyrhizobiaceae Species 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L Calcium hydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N Sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 230000001681 protective Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0025—Adding carbon material
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
- JVi: 297244 KLASSE 18 b. GRUPPE- JVi: 297244 CLASS 18 b. GROUP
Man hat verschiedentlich versucht, den Kohlenstoffgehalt eines Metallbades zu erhöhen, indem man kohlenstoffreiche Zusätze, wie z, B. Koks, in den Schmelzofen oder in die Gieß-. 5 pfanne chargierte. So hat man solche kohlenstoffreiche Zusätze entweder fein verteilt oder in Säcken oder Päckchen mit dem Einsatz in den Ofen gebracht. In anderen Fällen, zum Zwecke der Aufkohlung eines Bades, hat man die kohlenstoffreichen Zusätze brikettiert und diese hierbei zum Teil auch mit Eisen vermischt und beschwert oder auch in Röhren gepackt oder auch Koks allein ohne besondere vorherige Behandlung chargiert. Diese Verfahren haben nicht in wünschenswertem Maße Erfolg gehabt, da die kohlenstoffreichen Zusätze zum großen Teil verbrennen oder auch mechanisch verlorengehen, ohne daß der Kohlenstoffgehalt des Bades in der beabsichtigten Höhe angereichert wird. Besonders trifft dies zu bei dem Verfahren, bei welchem man, wie vorhin erwähnt, Koks, der vorher keine Behandlung erfahren hatte, also durch keinerlei Schutzmittel vor dem Verbrennen geschützt war, zusetzte, so daß infolge des mehr oder weniger großen Verlustes an Kohlenstoff stets eine ungleichmäßige Aufnahme des letzteren durch das Bad eintrat, was sich beim Chargengang unangenehm fühlbar machte.Various attempts have been made to increase the carbon content of a metal bath by carbon-rich additives, such as coke, in the melting furnace or in the casting. 5 pan charged. So one has either finely divided such carbon-rich additives or put in sacks or packets with the insert in the oven. In other cases, for For the purpose of carburizing a bath, the carbon-rich additives have been briquetted and some of these are mixed with iron and weighed down or packed in tubes or even coke is charged alone without any special prior treatment. Have these procedures not had success to the desirable extent as the high carbon additives add to the great Part burn or be lost mechanically without affecting the carbon content of the Bath is enriched in the intended amount. This is particularly true for the procedure in which, as mentioned before, coke is used which has not previously received any treatment had, so was not protected from burning by any protective means, added, so that as a result of the greater or lesser loss of carbon there is always a non-uniform one The latter was taken up by the bath, which was uncomfortably felt during the batch process made.
Die Verbrennung des Kohlenstoffes wird vermieden, und dieser geht nahezu vollständig ins Bad, wenn gemäß der Erfindung ein Kohlungsmittel verwendet wird, das mit einem es vor dem Verbrennen schützenden Überzug versehenThe combustion of the carbon is avoided, and this goes almost completely into the Bad, if according to the invention a carbonic agent is used, which is before a protective coating against burning
ist. Als solcher Überzug kann z. B. Kalkmilch, Gipsbrei, Wasserglas oder Mischungen davon gewählt werden:is. As such a coating, for. B. milk of lime, gypsum paste, water glass or mixtures thereof to get voted:
Das Wesen des Überzuges besteht darin, daß nach dem Einbringen des mit ihm versehenen Kohlungsmittels der Überzug unter dem Einfluß der Wärme schmilzt bzw. verschlackt wird, so daß alsdann die Oberfläche des kohlenstoff-reichen Materials im Maße des Schmelzens bzw. Verschlackens des Überzugs nur ganz all-■mählich mit dem flüssigen Eisen in Berührung kommt und dieses den Kohlenstoff tatsächlich aufzunehmen vermag. . : The essence of the coating is that after the introduction of the carbonizing agent provided with it, the coating melts or slagged under the influence of heat, so that then the surface of the carbon-rich material is only completely covered to the extent of melting or slagging of the coating gradually comes into contact with the liquid iron and this is actually able to absorb the carbon. . :
Das Kohlungsmittel gemäß der Erfindung · kann in Stücken von beliebiger Größe zur Benutzung gelangen.The carbonant according to the invention can be used in pieces of any size reach.
Beim Martin-Schmelzen z. B. hat die Verwendung des neuen Kohlungsmittels eine Verringerung des Roheisensatzes und damit bei entsprechendem Preisunterschied zwischen Roheisen und Schrott größere Wirtschaftlichkeit zur Folge. Bei dem gleichen Prozeß kann die Verwendung des neuen Kohlungsmittels auch dann in Frage kommen, wenn man den Roheisensatz aus anderen als wirtschaftlichen Gründen verringern will, wenn also z. B. nur sehr manganreiches Roheisen zur Verfügung steht, so daß bei einem größeren Roheisensatz der Mangangehalt des Bades zu hoch werden würde.When Martin melting z. B. the use of the new carburizing agent has a reduction of the pig iron rate and thus with a corresponding price difference between pig iron and scrap result in greater profitability. In the same process, the Use of the new Kohlungsmittel also come into question, if one uses the pig iron rate wants to reduce for other than economic reasons, so if z. B. only a lot Manganese-rich pig iron is available, so that with a larger pig iron set the The manganese content of the bath would become too high.
Claims (1)
Publications (1)
Publication Number | Publication Date |
---|---|
DE297244C true DE297244C (en) |
Family
ID=551556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT297244D Active DE297244C (en) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE297244C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE890511C (en) * | 1938-05-08 | 1953-09-21 | Administration Sequestre Des R | Process for deoxidizing and degassing steel |
DE1085902B (en) * | 1954-11-03 | 1960-07-28 | Hoesch Ag | Carburant for deoxidation of molten steel blown in converters |
-
0
- DE DENDAT297244D patent/DE297244C/de active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE890511C (en) * | 1938-05-08 | 1953-09-21 | Administration Sequestre Des R | Process for deoxidizing and degassing steel |
DE1085902B (en) * | 1954-11-03 | 1960-07-28 | Hoesch Ag | Carburant for deoxidation of molten steel blown in converters |
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