公开(公告)号：US20240018028A1

公开(公告)日：2024-01-18

申请号：US18253290

申请日：2021-11-19

Applicant: ROCKWOOL A/S

Inventor： Lars Elmekilde HANSEN ,  Haosheng ZHOU

IPC: C03B5/235 ,  C03B5/12 ,  C03B37/04 ,  C03C13/06

CPC classification number: C03B5/2353 ,  C03B5/12 ,  C03B37/04 ,  C03C13/06 ,  C03B2211/30

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 NOx and/or hydrogen in the furnace off-gas.