Characterization of the Amazon river sand for the casting of parts in the naval industry / Caracterização da areia do rio Amazonas para fundição de peças na indústria naval

Raimundo Nonato Alves da Silva, José Costa de Mâcedo Neto, Solenise Pinto Rodrigues Kimura, Bruno Mello de Freitas, João Carlos Martins da Costa, Márcio da Silva Rabbi, Marcionilo Neri da Silva Júnior


Concern about the environment is rising exponentially, mainly due to the availability of resources such as energy and raw materials. However, to preserve the environment, the foundry industries should contribute significantly to reducing the impacts generated by these activities, due to the high consumption of energy and raw materials, generating environmental impacts associated mainly with the generation of waste. Therefore, there is a great need to look for new alternatives for more sustainable production. Currently, in the city of Manaus, we have some foundry companies that use the Amazon river sand as raw material. Sand collection is nearby the city where there is a large concentration of sedimentary material. This paper presents the physical and chemical characterization of river sand through laboratory tests and tests. The results show sand that does not require chemical resin due to its refractory characteristics, because it is very thin and abundant, presents an opportunity to use in the melting of low melting alloys such as aluminium (Al), copper (Cu), among others, thus providing a very low cost. In the practical test, there was no sand washing, e.g., it was used in natura, and they have fluxing materials such as iron (Fe2O3) and titanium (TiO2), materials that decrease the melting point of the material. In the sintering temperature tests, we have seen that the material has a low melting point compared to other types of feedstock having the same application (sand casting).





Sustainable, Sand Moulding, Amazon River, Casting, Characterization.

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