Smältugn i synnerhet en likströmsljusbågsugn för behandling av finfördelat material samt förfarande för tillförsel av finfördelat material i nämnda smältugn

• Main Authors: R M HEIKKILAE, L L LILJA, M E HONKANIEMI, N H HAKULIN, H J KROGERUS
• Format: Patent
• Language: Swedish
• Published: 07.02.1994
• Edition: 5
• Subjects: BLASTING; CHEMISTRY; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FURNACES; FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; HEATING; KILNS; LIGHTING; MANUFACTURE OF IRON OR STEEL; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; OPEN SINTERING OR LIKE APPARATUS; OVENS; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; RETORTS; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; WEAPONS

The invention relates to a smelting furnace, particularly a D.C. arc furnace, suited for the treatment of finely-divided material, which comprises at least three electrodes suspended through the roof in order to create the electric arc. The process material is fed in through at least one feed gate (30) arranged inside the circle orbit formed by the electrodes (4, 16, 26) suspended through the furnace roof, which feed gate (30) is provided with auxiliary members in order to create an even supply of the material into the furnace. In order to discharge the gases created in the process, there is provided at least one outlet (20) outside the circle orbit formed by the electrodes (4, 16, 26). The invention also relates to a method for feeding finely divided material into the smelting furnace. According to this method, the material is fed through the feed gate (30) in suspension, either vertically or tangentially.