DE1180095B - Slag-forming cover powder for the arc block head heating of cast steel - Google Patents
Slag-forming cover powder for the arc block head heating of cast steelInfo
- Publication number
- DE1180095B DE1180095B DEK37571A DEK0037571A DE1180095B DE 1180095 B DE1180095 B DE 1180095B DE K37571 A DEK37571 A DE K37571A DE K0037571 A DEK0037571 A DE K0037571A DE 1180095 B DE1180095 B DE 1180095B
- Authority
- DE
- Germany
- Prior art keywords
- slag
- powder
- cast steel
- block head
- forming cover
- 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
Links
- 239000000843 powder Substances 0.000 title claims description 16
- 238000010438 heat treatment Methods 0.000 title claims description 10
- 229910001208 Crucible steel Inorganic materials 0.000 title claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 6
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000292 calcium oxide Substances 0.000 claims description 2
- 150000004820 halides Chemical class 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 239000002893 slag Substances 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
- B23K35/361—Alumina or aluminates
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Oxide Ceramics (AREA)
Description
Schlackenbildendes Abdeckpulver für die Lichtbogen-Blockkopfbeheizung von gegossenem Stahl Die vorliegende Erfindung bezieht sich auf ein schlackenbildendes Abdeckpulver für die Lichtbogen-Blockkopfbeheizung von gegossenem Stahl.Slag-forming cover powder for arc block head heating of Cast Steel The present invention relates to a slag forming Covering powder for the arc block head heating of cast steel.
Derartige schlackenbildende Abdeckpulver, die in der Praxis auch häufig »Hot-Top-Pulver« genannt werden, dienen dazu, den Wärmeverlust des flüssigen Blockoberteils zu vermindern.Such slag-forming covering powder, which is also common in practice "Hot-top powders" are used to reduce the heat loss from the liquid block top to diminish.
Es sind bereits schlackenbildende Abdeckpulver für die Lichtbogen-Blockkopfbeheizung von gegossenem Stahl bekannt, die unter anderem Kieselsäure, Aluminiumoxyd, Kalziumoxyd, Magnesiumoxyd und Kalziumfluorid aufweisen. Es hat sich jedoch gezeigt, daß diese schlackenbildenden Abdeckpulver schwerwiegende Nachteile haben, weil der Wirkungsgrad der Beheizung relativ gering ist, so daß die mit solchen Schlacken durchgeführten Lichtbogen-Beheizungsverfahren nicht wirtschaftlich sind und bis zu 50 °/o der erzeugten Wärme verlorengeht, anstatt für die Beheizung des Stahles zur Verfügung zu stehen.There are already slag-forming cover powders for the arc block head heating known from cast steel, which among other things contain silica, aluminum oxide, calcium oxide, Include magnesium oxide and calcium fluoride. However, it has been shown that this Slag-forming cover powders have serious disadvantages because of their efficiency the heating is relatively low, so that carried out with such slags Arc heating processes are not economical and produce up to 50% Heat is lost instead of being available for heating the steel.
Die vorliegende Erfindung vermeidet diese Nachteile dadurch, daß das Pulver frei von Bestandteilen, insbesondere Halogeniden ist, welche im flüssigen Zustand eine elektrische Leitfähigkeit bedingen.The present invention avoids these disadvantages in that the Powder is free of components, especially halides, which are in the liquid Condition an electrical conductivity.
Die Erfindung beruht auf der Erkenntnis, daß die Ionenleitfähigkeit der Schlacke im flüssigen Zustand möglichst klein gehalten werden muß, um zu verhindern, daß die Schlacke die Rolle eines Heizleiters übernimmt, in welchem die elektrische Energie in Wärme umgesetzt wird. Die in der Schlacke erzeugte Wärme wird besonders intensiv nach oben abgestrahlt und ist eine der Ursachen für die starke Herabsetzung des Wirkungsgrades bei den bekannten Abdeckschlacken.The invention is based on the knowledge that the ionic conductivity the slag in the liquid state must be kept as small as possible in order to prevent that the slag takes on the role of a heat conductor in which the electrical Energy is converted into heat. The heat generated in the slag becomes special intensely radiated upwards and is one of the reasons for the strong degradation the efficiency of the known covering slags.
Wegen der vorhandenen Ionenleitfähigkeit der bekannten Schlacken setzt der Lichtbogen außerdem nicht direkt auf dem Stahlbad an wie bei der erfindungsgemäßen Schlacke, sondern weist--.einen Brennpunkt auf, der innerhalb der Schlacke liegt, wodurch zusätzlich eine Verschlechterung der Wärmeübertragung auf das Stahlbad bewirkt wird. Das erfindungsgemäße Abdeckpulver hingegen erzeugt eine als . Isolator wirkende Schlacke, welche lediglich die Aufgabe der Wärmedämmung übernimmt, ohne selber als Leiter für die elektrischen Vorgänge zu dienen, welche sich im wesentlichen so abspielen, als ob die Schlacke nicht vorhanden wäre.Because of the existing ionic conductivity of the known slag sets In addition, the arc does not act directly on the steel bath as in the case of the one according to the invention Slag, but has -. A focal point that lies within the slag, which additionally causes a deterioration in the heat transfer to the steel bath will. The covering powder according to the invention, on the other hand, produces an as. Acting isolator Slag, which only takes on the task of thermal insulation, without itself as To serve as conductors for the electrical processes, which essentially take place in this way, as if the slag wasn't there.
Gemäß einem bevorzugten Ausführungsbeispiel der Erfindung weist das
schlackenbildende Abdeckpulver folgende Zusammensetzung auf
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEK37571A DE1180095B (en) | 1959-04-24 | 1959-04-24 | Slag-forming cover powder for the arc block head heating of cast steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEK37571A DE1180095B (en) | 1959-04-24 | 1959-04-24 | Slag-forming cover powder for the arc block head heating of cast steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1180095B true DE1180095B (en) | 1964-10-22 |
Family
ID=7221061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEK37571A Pending DE1180095B (en) | 1959-04-24 | 1959-04-24 | Slag-forming cover powder for the arc block head heating of cast steel |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1180095B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19840125A1 (en) * | 1998-09-03 | 2000-03-09 | Abb Patent Gmbh | Connection of electrical conductors and method for connecting electrical conductors |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT182832B (en) * | 1954-01-14 | 1955-08-10 | Kellogg M W Co | Process to avoid cavities and segregation when casting killed steel |
-
1959
- 1959-04-24 DE DEK37571A patent/DE1180095B/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT182832B (en) * | 1954-01-14 | 1955-08-10 | Kellogg M W Co | Process to avoid cavities and segregation when casting killed steel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19840125A1 (en) * | 1998-09-03 | 2000-03-09 | Abb Patent Gmbh | Connection of electrical conductors and method for connecting electrical conductors |
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