The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 08, 1986
Filed:
May. 06, 1985
Klaus Schramm, Essen, DE;
Frank & Schulte GmbH, Essen, DE;
Abstract
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 SiO.sub.2, Al.sub.2 O.sub.3 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 SiO.sub.2 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.