FURNACE PORT SUCTION AIR AMOUNT MEASURING METHOD IN CONVERTER WASTE GAS TREATING APPARATUS

摘要

PURPOSE:To accurately measure the fluctuating furnace port suction air amount by calculating the furnace port suction air amount from gas analysis data and waste gas flow rate, calculating skirt resistance from this air amount and in-furnace pressure and adding the correction corresponding to disturbances to this. CONSTITUTION:The data of a waste gas flow rate indicating recorder 14 and gas analyzer 15 are operated by an operator 16 to calculate the furnace port suction air amount. The effective skirt resistance is derived from this value and the infurnace pressure obtainable from the furnace pressure gauge 13 of that time, whereby the momentarily changing furnace port suction air amount is obtained. Beforehand, the correction amounts by disturbance elements are obtained empirically by disturbances such as the position of a skirt 4, the height of a lance 3, blowing oxygen flow rate, the time during slopping occurrence, etc. respectively. The correction is applied to the skirt resistance value by these data when disturbance elements occurred. Thereby, the furnace port suction air amount is measured relatively accurately at all times.