Aluminum dihydrogen phosphate and steel fiber reinforced refractory castable and preparation method

Abstract

The invention discloses an aluminum dihydrogen phosphate and steel fiber reinforced refractory castable and a preparation method. The aluminum dihydrogen phosphate and steel fiber reinforced refractory castable comprises a main refractory material, an additive and a binding agent; the raw material of the binding agent comprises an aluminum dihydrogen phosphate aqueous solution in mass concentration of 45-50%; thiourea and potassium iodide are dissolved in the aluminum dihydrogen phosphate aqueous solution in mass concentration of 45-50%; the weight of the aluminum dihydrogen phosphate aqueoussolution in mass concentration of 45-50% is 8-12% of total weight of the main refractory material. The aluminum dihydrogen phosphate and steel fiber reinforced refractory castable is adopted for preparing the products, such as a molten iron slagging plate with a carbon steel metal core wrapped with a refractory material; the generation of reaction gas of aluminum dihydrogen phosphate is avoided during the processes of castable preparation and casting molding; water resistance and strength under normal temperature of the casting body are promoted; excellent effects of greatly reducing the timeof casting molding and baking preparation, reducing baking energy consumption and prolonging service life are achieved.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to an aluminum dihydrogen phosphate bonded steel fiber reinforced refractory castable and a preparation method thereof. Background technique [0002] The literature "Jia Jiangyi, Li Luoli, Bai Jianwei, Effect of Aluminum Dihydrogen Phosphate on the Properties of Al2O3—SiO2 Castables, Ceramics, 2008, No5" pointed out that the binder is one of the main factors determining the properties of monolithic refractory materials. The normal temperature performance of the material also has different degrees of influence on the high temperature performance of the material. Due to the high melting point and condensation polymerization of phosphate, its theoretical bonding strength is as high as 110MPa, which is much higher than other bonding agents. It has good acid resistance, high strength, excellent wear resistance, high softening temperature under load, and a wide ra...

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Problems solved by technology

It can be seen that for the steel fiber reinforced castables combined with aluminum dihydrogen phosphate, although the steel fibers will not be corroded during the preparation process of the castables at room temperature, they will corrode the stirring devices and templates made of carbon steel, especially when directly mixed with carbon steel. How to prevent the corrosion of aluminum dihydrogen phosphate in the metal core structure and ensure the structural function of the metal core is related to the pros and cons of the overall function and performance of the casting complex. During the baking process of the cast body, with the heating up of baking and the evaporation of water, the corrosion environment of steel fiber and carbon steel changes sharply, and the corrosion rate rises sharply

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