A kind of phosphate inorganic binder sand with high fluidity and preparation method thereof

Abstract

The invention belongs to the field of casting and particularly relates to high-fluidity phosphate inorganic binder sand and a preparation method thereof. The high-fluidity phosphate inorganic binder sand comprises, by mass, 2500 parts of burnt sand, 100 parts of a phosphate inorganic binder, 8 parts of a metallic oxide curing agent and 5 parts of an addition agent. The addition agent comprises a solution prepared by one or more nonionic surface active agents such as alkyl glycoside, 1-61, 1-62, S-80 and MOA-9P, and silicon dioxide with the granularity at 400-1200 meshes and mixed with the solution; and the weight ratio of the nonionic surface active agents to the silicon dioxide is 1:5-1:3. According to the high-fluidity phosphate inorganic binder sand and the preparation method thereof, while the inherent advantages of cleanliness and environment protection, good collapsibility, high strength and the like of the phosphate binder sand are maintained, the fluidity of the phosphate binder sand is greatly improved, and requirements for novel green casting materials and a casting method in modern casting production are met.

Description

technical field [0001] The invention belongs to the field of casting, and in particular relates to a phosphate inorganic binder sand with high fluidity and a preparation method thereof. Background technique [0002] Casting is one of the basic processes of modern machinery manufacturing industry. As an important part of China's manufacturing industry, my country's foundry industry is also developing rapidly. However, in this industry, environmental pollution problems have always existed in large numbers. With everyone With the gradual improvement of environmental awareness, the development of green casting methods and materials is the key to the realization of green casting. However, at present, organic resin binders are still used in large quantities in the casting production process. Such binders generally contain toxic substances such as furan, benzene, and phenol, which are used in various production processes such as molding, core making, pouring, and old sand treatment....

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Problems solved by technology

But at present, in the foundry production of phosphate inorganic binder, because boric acid is added to the phosphate inorganic binder as a modifier, the viscosity of the binder increases, resulting in poor fluidity of the original phosphate inorganic binder sand. , so that the compactness of the phosphate inorganic binder sand is not enough during the molding process, resulting in low efficiency and poor casting quality in the production of castings, and it is difficult to adapt to the high-volume and high-efficiency manufacturing of precision casting molds and sand cores in modern foundry production. need

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