Method for preparing antisticking foundry sand

Abstract

The invention provides a preparation method of an anti-sticking casting sand, wherein raw materials contain montmorillonite powder, aluminum silicate fiber and common molding sands, wherein, the weight ratio of each component is 5 to 10 portions of montmorillonite powder, 5 to 15 portions of aluminum silicate fiber and 70 to 100 portions of common molding sands. The preparation method comprises a single step that the components are mixed up according to the ratio. Compared with the prior art, the preparation method of anti-sticking casting sand has the advantages of extensive source of raw materials, simple processing technology, low cost, little ignition loss, high reusability, almost no gas of coating, environmental friendliness, good anti-sticking effect, superior processing property, etc, and has high economic benefit and high popularization 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.