Coarse seam paste: It is a low-temperature coarse seam paste made mainly from high-temperature electrically calcined smokeless coal, artificial graphite, natural graphite, and metallurgical coke, with a mixture of coal tar pitch, coal tar, and scallion oil mixed with additives as a binder, and processed by cold tamping technology. When used for laying blast furnace lining, it is filled with charcoal blocks, cooling equipment, and charcoal