Stemming components. Stemming a monolithic refractories, its composition can be divided into two parts: the refractory aggregate and binding agents. It refers corundum refractory aggregate, mullite, flint and other refractory materials and coke, mica and other modified material. These materials according to a certain size and weight of the composition of the matrix, under reconcile binder stemming make a certain plasticity at strengthening powder additive so stemming the organizational structure of a certain density, in order to improve the strength and high temperature stemming performance. Blast furnace oral damage stemming mechanism: the impact of a number of iron. Blast furnace number of small, supply of new water cannons mud, stemming in sintered iron mouth completely, the new water cannons mud offer conducive taphole maintenance. Times more iron, the iron short interval, stemming not completely sintered iron mouth, low structural strength, stemming iron slag chemical attack and mechanical deterioration erosion, tidal iron mouth, new water cannons mud, shallow iron mouth often, new water cannons mud Price, iron slag can not see the mouth, often running crowd, only to let in fresh air, or pull the wind out of iron, affect the safety of the production of blast furnace. The pursuit of a long iron, iron reduction is the direction for the large number of blast furnaces.