dryramming materialSynthetic magnesia with high iron and high calcium and fused magnesia are used as aggregates, synthetic magnesia and fused magnesia are used as fine powders, the critical particle size is 5~6mm, and C2F (2 calcium ferrite) in synthetic magnesia is used as The sintering aid, without adding any binder, is made of multi-stage ingredients. Through strong ramming construction, the density after construction is guaranteed, and it can be sintered into a solid whole at an appropriate temperature, and its life is longer than that of the previous knotting and masonry. The brick method should be improved several times. Under normal circumstances, the one-time life of dry ramming material can reach more than 300 furnaces, and it can be extended to 500 to 600 furnaces through hot repair, which not only reduces the number of furnace shutdowns, but also consumes a lot of refractory per ton of steel. reduce.