Performance Comparison of Different Blast Furnace Hearth Designs using a Novel Structural Refractory Assessment Methodology

摘要

The blast furnace hearth refractory system is exposed to complex chemical attack, erosion and thermal and mechanical loads. This includes thermally-induced stresses, internal pressure, hydrostatic gravity loading from the hot metal, and surcharge loads due to coke and other burden above the hearth. The hearth is a region of primary concern since excessive refractory failure and degradation limits the furnace campaign life and leads to premature and costly repairs. A robust hearth refractory lining design is needed to avoid or minimize furnace downtime and maximize the campaign life.