AT55515B - Process for the production of cast iron by melting down briquetted iron filings. - Google Patents
Process for the production of cast iron by melting down briquetted iron filings.Info
- Publication number
- AT55515B AT55515B AT55515DA AT55515B AT 55515 B AT55515 B AT 55515B AT 55515D A AT55515D A AT 55515DA AT 55515 B AT55515 B AT 55515B
- Authority
- AT
- Austria
- Prior art keywords
- production
- iron
- cast iron
- briquetted
- melting down
- Prior art date
Links
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
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Manganuperoxyd oder Magnesia oder Schlemmkreide zugegeben wurde. Dabei dient das Wasserglas gleichzeitig als schlackenbildendes Mittel und wirkt infolge seines Alkaligehal1es rostschützend, was deshalb von Bedeutung ist, weil die zu verarbeitenden Späne nie rostfrei sind und die schädlichen Wirkungen des Oxydes bei einem Qualitätsgusseisen sehr scharf hervortreten,
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Das so erhaltene Gemisch wird nun in geeigneten Pressen zu Formstücken gepresst, die dann nach erfolgtem Trocknen im Kupolofen mit gewöhnlichem Roheisen vermischt eingeschmolzen werden.
Dabei kann die Menge der benützten Stahlbriketts bis 50% und noch mehr der Charge betragen; das erhaltene Gusseisen ist umso reiner bzw. enthält umso weniger Schwefel und Phosphor, je grössere Brikettmengen verwendet werden.
Bei Versuchen mit Stahlbriketts, denen in der beschriebenen Weise 1 . Holzkohlenpulver. einem Siliziumgehalt von 0'25% der Briketts entsprechende Menge von Ferrosilizium und t"o Kieselsäure (Sand) zugegeben wurde, ergibt sich, dass bei steigendem Zusatz von Stahlbriketten der Kohlenstoff- und Siliziumgehalt des Produktes wesentlich ansteigt, während der Gehalt an : hwefel, Phosphor und Mangan sinkt, Bei diesen Versuchen wurde stets das gleiche Roheisen verwendet.
Kokillengiisse aus Gusseisen, das aus 3000 Stahl enthaltender Charge erschmolzen wurde. waren) rn ganzen Querschnitt vollkommen grau und zeigten keine harte Kruste.
In manchen Fällen werden den Briketts auch andere Zuschläge, wie Ferromangan und dgI.. einverleibt, um so durch Bildung einer manganhaltigen Schlacke das Entschwefeln des Roheisens zu bewirken.
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Manganese peroxide or magnesia or chalk was added. At the same time, the water glass serves as a slag-forming agent and, due to its alkali content, has a rust-protecting effect, which is important because the chips to be processed are never rust-free and the harmful effects of the oxide come out very sharply with a quality cast iron.
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The mixture obtained in this way is then pressed into shaped pieces in suitable presses which, after drying, are then melted in a cupola, mixed with ordinary pig iron.
The amount of steel briquettes used can be up to 50% and even more of the batch; the resulting cast iron is the purer or contains less sulfur and phosphorus, the larger the amount of briquette used.
In tests with steel briquettes, which in the manner described 1. Charcoal powder. a silicon content of 0'25% of the briquettes corresponding amount of ferrosilicon and t "o silica (sand) was added, the result is that with increasing addition of steel briquettes the carbon and silicon content of the product increases significantly, while the content of: Phosphorus and manganese decrease. In these experiments the same pig iron was always used.
Chill casting made of cast iron, which was melted from a batch containing 3000 steel. were completely gray across the entire cross-section and showed no hard crust.
In some cases other additives, such as ferromanganese and the like, are also incorporated into the briquettes in order to effect desulphurisation of the pig iron by forming a manganese-containing slag.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT55515T | 1910-01-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT55515B true AT55515B (en) | 1912-09-25 |
Family
ID=3577015
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT55515D AT55515B (en) | 1910-01-20 | 1910-01-20 | Process for the production of cast iron by melting down briquetted iron filings. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT55515B (en) |
-
1910
- 1910-01-20 AT AT55515D patent/AT55515B/en active
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