Metal founding – Process – Including recycling of process material
Patent
1994-06-27
1996-07-30
Lavinder, Jack W.
Metal founding
Process
Including recycling of process material
209 5, B03B 100
Patent
active
055402704
ABSTRACT:
Disclosed is a process for treatment of bulk materials which are loaded with impurities and pollutants. Preferably the process treats bulk material from the category of clay-bonded used foundry sand. Depending on the provenance of the sand, composition of the sand, and the type of binders employed, this sand is subjected to a regeneration process including dry mechanical pretreatment and wet attrition treatment to produce regenerated sand and fine grain-containing waste water. The fine grain-containing waste water is subjected to a multiple-stage waste water treatment based on agglomeration processes after adjustment of the pH level of the waste water.
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Encyclopedia of Chemical Technology vol 10 pp. 489-516 (1980).
Grote Johannes
Skidmore Terry D.
Thiem Ulrich
Herrick Randolph S.
Lavinder Jack W.
NOELL Abfall-Und Energietechnik GmbH
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