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首页> 外文期刊>International Journal of Metalcasting: Leading the Transfer of Research and Technology for the Global Metalcasting Industry >Comparing Sands From Different Reclamation Processes for Use in the Core Room of Cylinder Heads and Cylinder Blocks Production
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Comparing Sands From Different Reclamation Processes for Use in the Core Room of Cylinder Heads and Cylinder Blocks Production

机译：比较来自不同填海工艺的砂，用于气缸盖和气缸体的核心室生产

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摘要

The use of reclaimed sands in the cold-box core room is discussed, comparing three different reclamation processes. The first is called a thermal process that treats resin-bonded sand in a hot fluidized bed. The second is a wet process, removing bentonite and coal dust from green sand with water and attrition treatments. The third is a mechanical-thermal-mechanical process (pneumatic-hot fluidized bed-pneumatic), operating with a mixture of green sand and resin-bonded sand. The experimental study, in the laboratory and with foundry trials, shows that all processes result in some impurities in the sand that bring some changes in the core properties. Residues from core coatings, from bentonite and from decomposed seacoal, can lower the core strength and the bench life; at the same time, some of the residues can improve hot properties of the core, reducing veining tendency and core deformation. Therefore, some reclaimed sands can be used as special additives in the core room.
机译：讨论了在冷箱核心室中的再生砂，比较了三种不同的填海工艺。 首先称为热过程，其将树脂粘合的砂矿在热流化床中处理。 第二种是湿法，从绿色沙子中除去膨润土和煤尘，与水和磨损处理。 第三是机械热机械工艺（气动热流化床气动），用绿砂和树脂粘结砂的混合物操作。 在实验室和铸造试验中的实验研究表明，所有过程都会导致砂中的一些杂质，从而带来核心特性的一些变化。 来自煤矿和分解的海面的核心涂层残留物，可以降低核心强度和板凳; 同时，一些残留物可以改善核心的热特性，降低淋雾趋势和核心变形。 因此，一些再生砂可以用作核心房间的特殊添加剂。

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