Cleaning and liquid contact with solids – Processes – For metallic – siliceous – or calcareous basework – including...
Patent
1989-08-23
1990-08-28
Sneed, H. M. S.
Cleaning and liquid contact with solids
Processes
For metallic, siliceous, or calcareous basework, including...
134 10, 134 251, 134 28, 134 30, 164 5, 423340, C23G 102
Patent
active
049522469
ABSTRACT:
Green sand having a residuum of retained clay is reconditioned by screening and predrying it to about zero moisture; calcining the sand to burn off organic matter; cooling the sand; mechanically scrubbing the cooled sand to free mechanically bonded clay and a portion of the clay magnetically adhered to the sand; mixing an acid/water solution with the sand to react with the remaining magnetically adhered clay to permit such clay to break free from the sand; drying the sand to release the freed clay; and extracting the thus-released clay from the sand.
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Cohen Sharon T.
Dependable Foundry Equipment Company, Inc.
Sneed H. M. S.
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