The grouting technology is a very important maintenance method of the blast furnace stack. In China,the grouting process is completed by experience,so the furnace shell is always burnt and the mud material sometimes permeates into hot metal through the furnace lining,leading to accidents. In this paper,a stress calculation model of the furnace lining in the grouting process is set up with ANSYS software based on the finite element method and the theory of elastic mechanics. By using this model,the stress di...