Method for preparing antisticking foundry sand

Abstract

The invention provides a method for preparing anti-stick casting sand, wherein the raw materials include montmorillonite powder, aluminum silicate cotton and ordinary molding sand, and the weight composition of each component is 5-10 parts of montmorillonite powder, 5-15 parts of aluminum silicate cotton , 70-100 parts of ordinary molding sand, preparation method: mix evenly according to the formula ratio. Compared with the prior art, the preparation method of the anti-stick casting sand of the present invention has the advantages of wide source of raw materials, simple processing technology, low cost, small burning volume, strong reusability, almost no gas generation, environmental protection, good anti-stick effect, It has the characteristics of superior process performance, etc., and has good economic benefits and promotion and use value.

Description

technical field [0001] The invention relates to a kind of foundry sand, in particular to a preparation method of anti-stick foundry sand. Background technique [0002] At present, the anti-sticking sand additives used at home and abroad mainly include the following four categories: (1) petroleum derivatives; (2) coal and coal processing products; (3) polymers; (4) various starches and woods. The materials used as additives for petroleum derivatives are mainly natural asphalt, artificial asphalt, oil residue, heavy oil, etc. Its advantages are: high content of bright carbon, good effect of anti-sticking sand, and the software can also prevent expansion such as sand inclusion at high temperature Such defects, but it will emit a bad smell when pouring, which will cause certain pollution to the environment, and it needs to be made into an emulsion or heated to a liquefied state when it is used, and the use process is more troublesome. Polystyrene is mainly used as an additive f...

AI Technical Summary

Problems solved by technology

Although pulverized coal is used as an additive with high bright carbon content and better anti-sticking effect, in order to achieve the effect of anti-sticking sand, a large amount of people is added, resulting in a decline in the performance of the molding sand process. At the same time, the working environment is poor, and the price of pulverized coal continues to increase. The supply of high-quality pulverized coal is tight and the use is restricted

[0003] In the patent literature, oil shale, starch and fruit shells are also used as molding sand additives. The shortcomings are shortage of raw materials, high cost, complicated process, and it is not easy to be widely used.