The invention discloses a method for preparing inorganic fibers by compounding of
slag and
coal gangue. According to the method provided by the invention, firstly, desulfurization
gypsum and CaO are used as activators, the
coal gangue and
fly ash are subjected to chemical / thermal composite excitation treatment, the
coal gangue and the
fly ash are excited by heat, so that the structure of glass networks of the
coal gangue and the
fly ash is destroyed, active SiO2 and Al2O3 are dissolved out, the dissolved-out active SiO2 and Al2O3 and CaO are subjected to a
solid phase reaction, a new substancewith hydraulic activity is generated, and the activity of a
pozzolanic reaction of the material is improved; and then the active material and
blast furnace slag are mixed and ground, melt
centrifugation drawing is performed, so that the inorganic fibers are prepared, the
slag and other raw materials are introduced in the manner of fibers, the fibers can be uniformly distributed into a hardened
slurry, and a grid structure can be formed, so that the problem of bleeding of concrete is improved, the compactness of the hardened
slurry is improved, and the
compressive strength and durability of the concrete are improved.