Melting Furnace and Method for Melting a Metal Material

Patent metadata

Field	Value
Publication number	US-2026071819-A1
Application number	US-202319103917-A
Country	US
Kind code	A1
Filing date	Aug 7, 2023
Priority date	Aug 19, 2022
Publication date	Mar 12, 2026
Grant date	—

Abstract

A melting furnace for melting a metallic material includes a receiving region for receiving the metallic material, a gas-burning device where the gas-burning device is disposed in the receiving region and where metallic material disposed in the receiving region is heatable and meltable by burning a gas by the gas-burning device, a heat-retention region, and an electrically operable heating device where a melt in the heat-retention region is able to be kept warm by the electrically operable heating device.

First claim

1 .- 11 . (canceled)

12 . A melting furnace for melting a metallic material, comprising:
a receiving region for receiving the metallic material; a gas-burning device, wherein the gas-burning device is disposed in the receiving region and wherein metallic material disposed in the receiving region is heatable and meltable by burning a gas by the gas-burning device; a heat-retention region; and an electrically operable heating device, wherein a melt in the heat-retention region is able to be kept warm by the electrically operable heating device.

13 . The melting furnace according to claim 12 , wherein the heat-retention region is at least partially overlapped upward and/or downward in a vertical direction by the electrically operable heating device.

14 . The melting furnace according to claim 12 , wherein the heating device is disposed on or in a base of the melting furnace and wherein the base downwardly delimits the heat-retention region in a vertical direction.

15 . The melting furnace according to claim 12 , wherein the heating device is disposed on or in a cover of the melting furnace and wherein the cover upwardly delimits the heat-retention region in a vertical direction.

16 . The melting furnace according to claim 12 , wherein the melting furnace is free from a gas burner for a direct heating of the heat-retention region.

17 . The melting furnace according to claim 12 , wherein the heating device comprises at least one resistance heating element for heating the heat-retention region.

18 . The melting furnace according to claim 12 , wherein the receiving region and the heat-retention region are embodied as a unit which cannot be separated without destruction.

19 . A method for melting a metallic material by a melting furnace, comprising the steps of:
receiving the metallic material in a solid aggregate state of the metallic material in a receiving region; heating, and thereby melting, the metallic material in the receiving region by a gas-burning device which is disposed in the receiving region by burning a gas; receiving a melt which results from the melting of the metallic material and is formed by the metallic material in a heat-retention region; and keeping the melt warm in the heat-retention region by an electrically operable heating device.

20 . The method according to claim 19 , wherein the melting furnace is operated in a heat-retention operation in which the melt is kept warm by the electrically operable heating device and wherein in the heat-retention operation the gas-burning device does not burn the gas.

21 . The method according to claim 20 , wherein during the heat-retention operation, active suction removal of the gas from the heat-retention region or from the receiving region does not occur.

22 . The method according to claim 19 , wherein the melting furnace is operated in a melting operation in which the gas-burning device is operated in a burning operation in which the gas-burning device burns the gas and, as a result, heats and melts the metallic material in the receiving region, while active suction removal of the gas from the receiving region and/or from the heat-retention region is effected by a suction-removal device of the melting furnace.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Buchauer Franz
• Schilling Markus

Classifications

• F27B1/08

  heated otherwise than by solid fuel mixed with charge · CPC title

• C22B21/0092

  Remelting scrap, skimmings or any secondary source aluminium · CPC title

• C22B21/0084

  melting and handling molten aluminium (C22B21/02, C22B21/04 and C22B21/06 take precedence) · CPC title

• F27B3/20

  Arrangements of heating devices · CPC title

• F27B3/18

  Arrangements of devices for charging · CPC title