Casting molding sand binder taking petroleum asphalt as main material

Abstract

The invention discloses a casting molding sand binder taking petroleum asphalt as a main material. The molding sand binder is characterized by being prepared through respectively using petroleum asphalt and vegetable residues as main raw materials and adding a certain volume of auxiliaries, such as a solvent and acid or base. A synthesis process of the molding sand binder comprises the steps of heating the petroleum asphalt and the solvent to the temperature of 150 DEG C, stirring and carrying out heat preservation for 4 hours. According to the molding sand binder, the molding sand binder is cheap, is sufficient in source, extremely simple in process and good in casting property and does not contain toxic and irritative substances, and various technical indexes of a casting process are all similar to those of the traditional tung oil; particularly, the molding sand binder adopts moraine-rich petroleum asphalt as a main raw material, so that the doped amount of Datong magnesium powder can be greatly reduced, the surface smoothness of cast parts can be greatly improved, and thus, the molding sand binder is an ideal novel binder.

Description

[0001] technical field [0002] The invention belongs to the technical field of casting, and in particular relates to a casting sand binder. [0003] Background technique [0004] The binders currently used in the foundry industry can generally be divided into three types, namely vegetable oil, synthetic fat and synthetic resin binders. Vegetable oil binder technology is the most mature, with a long history of use, and various process performance indicators are also relatively superior, but the main raw materials of the binder are tung oil and linseed oil, which are indeed valuable raw materials for the defense industry and chemical industry, and are not suitable for large quantities. It is used in the foundry industry, and it is not economically reasonable. The main raw materials of synthetic grease binders are by-products of chemical and light industries such as soap making, papermaking and petroleum processing, but the casting process performance of existing syntheti...

AI Technical Summary

Problems solved by technology

Vegetable oil binder technology is the most mature, with a long history of use, and various process performance indicators are also relatively superior, but the main raw materials of the binder are tung oil and linseed oil, which are indeed valuable raw materials for the defense industry and chemical industry, and are not suitable for large quantities. It is used in the foundry industry, and it is not economically reasonable. The main raw materials of synthetic grease binders are by-products of chemical and light industries such as soap making, papermaking and petroleum processing, but the casting process performance of existing synthetic grease binders is poor. , the strength is low, it is difficult to ensure the quality of castings, and the source of raw materials is also in short supply; while the synthetic address binder is expensive, and the production volume is difficult to meet the large demand of the foundry industry