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process of making stones from waste sand of foundry

Jan 01, 2018018332After each foundry operation, the moulds are opened up, large parts in the foundry sand are sieved and removed, and new sand is added to the system in the amount the sand that is removed. After a certain number of cycles, foundry sand becomes unusable for the moulds, which is discarded from the foundry as waste foundry sand WFS.

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