Patent ID: 7998400
Filing Date: 2011-08-16
Classification: C21C

Abstract:
1. Gas supply system ( 3 ) for a side blowing and/or bottom blowing metallurgical furnace with at least one tuyere ( 5 ), which is mounted in the side wall and/or in the bottom of the furnace, wherein gas is conveyed through a line ( 6 ) of the gas supply system to the tuyere ( 5 ) and through the tuyere to the interior of the metallurgical furnace and emerges there in the form of bubbles, wherein the gas supply system ( 3 ) has an inflow restrictor ( 7 ), which is assigned to the tuyere ( 5 ) or is positioned upstream of the tuyere ( 5 ) and is operative to actively reduce or interrupt reduces or interrupts the gas supply to the interior of the furnace at equal intervals of time, wherein the inflow restrictor ( 7 ) is operative to switch between an open position for unimpeded gas supply and an at least partially closed position for reduced or interrupted gas supply at a frequency of greater than 5 Hz.