Shaped body for feeding cupola furnaces

A shaped body for feeding cupola furnaces in the melting of cast iron composed of a silicon carrier as an alloying material, a slag-forming material and free carbon. The silicon carrier is in the form of SiC and/or FeSi. The slag-forming material is made of SiO2, Al2O3 and CaO. In order to avoid the...

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Bibliographische Detailangaben
Hauptverfasser:	SCHRAMM, KLAUS
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS FURNACES FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING KILNS LIGHTING MECHANICAL ENGINEERING METALLURGY METALLURGY OF IRON OPEN SINTERING OR LIKE APPARATUS OVENS PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL RETORTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS WEAPONS
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Beschreibung
Zusammenfassung:	A shaped body for feeding cupola furnaces in the melting of cast iron composed of a silicon carrier as an alloying material, a slag-forming material and free carbon. The silicon carrier is in the form of SiC and/or FeSi. The slag-forming material is made of SiO2, Al2O3 and CaO. In order to avoid the loss of silicon and have a silicon yield that may be safely controlled without the use of graphite when such bodies are used in unlined hot-blast cupola furnaces with steel scrap proportions in excess of 30% of the charge, the present invention uses free carbon in the form of calcined petroleum-, pitch-, or acicular coke or a combination thereof. Additionally, the ratio of SiO2 to free carbon is in the range of 2-4 and the basicity of the slag-forming material is in the range of 0.2-1.4. A method for using the shaped body in unlined hot-blast cupola furnaces to make cast iron is also disclosed.