| abstract |
The invention discloses a kind of blast furnace preparation methods of silicon nitride gunning refractory, belong to iron and steel smelting technology field.Graphene oxide, nanometer iron powder, dimethyl silicone polymer, emulsifier, sodium alginate solution mixing and ball milling are then added dropwise ammonium hydroxide and adjust pH to 10.1~10.3 by the present invention, and filtering is to get pretreatment additive；By powdered rice hulls, sepiolite, medical stone, biogas slurry, sucrose, sodium alginate solution mixed fermentation is filtered, dry, and charing obtains modified filter residue；By entringite, magnesia is mixed, sodium tripolyphosphate, aluminum-spinel, kyanite, zirconium oxide, bonding agent, electro-corundum, pretreatment additive, slag and modified filter residue mixing and ball milling are to get gunning refractory.Blast furnace provided by the invention has excellent mechanical property and slag resistance with silicon nitride gunning refractory. |