| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a blast furnace operation method which uses a charged material distribution model and a blast furnace mathematical model and reduces in-furnace pressure loss.SOLUTION: A blast furnace operation method comprises calculating a pile shape of a furnace-top charged material on the basis of pile angles and a furnace-top gas composition of a raw material layer determined by raw material charging conditions, blowing conditions and sensors, calculating the status of the inside of the furnace related to shape changes of an ore layer and a coke layer with falling load, shape changes of a cohesive zone and coke slits and a pressure distribution in the furnace by tracing the ore layer and the coke layer in the pile shapes by using equation (1) and modifying the raw material charging conditions or the blowing conditions according to results of the calculation of the in-furnace status. In equation (1), f is the volume abundance ratio; t is the time; u is the flow rate of solid; and R is the volume disappearance rate.</p> |
