MELTING FURNACE AND METHOD FOR OPERATING MELTING FURNACE

• Main Authors: INOUE, Shigenori, HOSHO, Fumiki
• Format: Patent
• Language: English; French; German
• Published: 07.08.2024
• Subjects: AIR SUPPLY; BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; CONSUMING WASTE PRODUCTS BY COMBUSTION; CREMATION FURNACES; DRAUGHT-INDUCING; HEATING; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING NON-COMBUSTIBLE LIQUID OR GAS; WEAPONS

Provided is a melting furnace that enables each process of volatilization, processing into slag, and metallization to be appropriately performed depending on a type of a metal when melting a treatment target containing multiple types of metals in the furnace. The melting furnace includes: a furnace chamber where a treatment target containing multiple types of metals is fed from an upstream side and subjected to melt treatment from a surface thereof by a heating mechanism provided on a furnace ceiling, thereby generating molten slag which flows down to a downstream side; and a slag port which discharges the flowed down molten slag, the melting furnace including: multi-stage nozzles arranged along the upstream side to the downstream side of the furnace chamber; and an atmosphere control mechanism which controls to vary a type and/or composition of gas supplied from each of the nozzles to adjust an atmosphere near a molten surface to either an oxidizing atmosphere or a reducing atmosphere in each of a plurality of areas from the upstream side to the downstream side, thereby melting a target metal among the multiple types of metals as molten metal which is separable from the molten slag, or capturing the target metal in the molten slag as a metal compound.