Method for producing inorganic cementing material by using solid wastes such as fly ash, mineral powder and desulfurized gypsum
A solid waste, inorganic gel material technology, applied in cement production and other directions, can solve the problems of poor impermeability and corrosion resistance, low tensile and impact strength, human and biological hazards, etc. Good fire resistance and sound absorption
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[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below, obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0023] The present invention provides a technical solution: a production of inorganic cementitious materials by using solid waste such as fly ash, mineral powder, desulfurized gypsum, etc., comprising the following steps:
[0024] Step 1: A small amount of desulfurized gypsum is calcined in stages in a non-airtight kiln. The first calcination produces β-type desulfurized gypsum containing a small amount of water, and the second calcination obtains β-type desulfurized gypsum with relatively uniform fineness and concentrated par...
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