Anhydrous phenolic resin binder for magnesia-calcium brick and preparation method of anhydrous phenolic resin binding agent

The invention relates to an anhydrous phenolic resin binder for magnesia-calcium bricks. The anhydrous phenolic resin binder comprises the following raw materials in parts by mass: 250-300 parts of phenol, 100-130 parts of a phenol derivative, 30-50 parts of bisphenol A, 300-400 parts of a formaldehyde aqueous solution, 150-200 parts of an epoxy reactive diluent, 180-220 parts of an ester solvent, 40-60 parts of polyol, 20-30 parts of methanol, 2-3 parts of an acid catalyst and 1-1.3 parts of an acid promoter. According to the invention, the phenol derivative and bisphenol A, especially a mixture containing p-cresol, m-cresol and long-chain alkyl substituted phenol, are added as the phenol derivative to improve the toughness, water resistance, oxidation resistance and heat resistance of the phenolic resin. An epoxy resin diluent is used for improving the compression strength of the anhydrous resin for the magnesia-calcium brick; and the resin is moisturized by using the ester solvent and the polyhydric alcoho