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:
May. 12, 2026
Filed:
Nov. 19, 2021
Applicant:
Rockwool A/s, Hedehusene, DK;
Inventors:
Lars Elmekilde Hansen, Hedehusene, DK;
Haosheng Zhou, Hedehusene, DK;
Assignee:
Rockwool A/S, Hedehusene, DK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03B 5/235 (2006.01); C03B 5/12 (2006.01); C03B 37/04 (2006.01); C03C 13/06 (2006.01);
U.S. Cl.
CPC ...
C03B 5/2353 (2013.01); C03B 5/12 (2013.01); C03B 37/04 (2013.01); C03C 13/06 (2013.01); C03B 2211/30 (2013.01);
Abstract
The invention relates to a method of preparing a mineral melt in a cupola furnace that uses at least one plasma torch to provide heat energy to the furnace. The plasma torch uses nitrogen, carbon monoxide, carbon dioxide, or a mixture thereof as the carrier gas. The invention also relates to a cupola furnace for the preparation of the mineral melt, and the use of a plasma torch in a cupola furnace to reduce the amount of NOand/or hydrogen in the furnace off-gas.