モデル実験炉による高炉湯溜り部耐火物の割れ発生機構の解析

抄録

Thermal stress analysis was made to study crack initiation mechanism of refractories (carbon block) at hearth of blast furnace.
In the analysis, 'Gap-link Model' was proposed to consider the effect of joint-mortar, stamp and shell which construct the boundary of carbon blocks. Calculated results show good agreement with those obtained by experiment of 1/4 scale testing hearth model furnace.
The main results obtained by 'Gap-link analysis' are as follows.
1 In heating process, adjacent carbon blocks come into partial contact with each other.
2 Radial tensile stress occurs at the end of contact region, and this tensile stress is considered to cause cracking at side faces of carbon blocks of the hearth model furnace.