Method for cold reclamation of foundry sand containing clay

Details Method for cold reclamation of foundry sand containing clay Method for cold reclamation of foundry sand containing clay

1998-03-09

1999-11-30

Batten, Jr., J. Reed

Metal founding

Process

Including recycling of process material

241 23, 241DIG10, 241DIG37, B22C 500, B22C 508

Patent

active

059924993

ABSTRACT:
Method and apparatus for reclaiming sand from a foundry sand containing, inter alia, a clay binder by cooling the foundry sand to a temperature at or below -40.degree. C. (-40.degree. F.) followed by separation of the sand from the binder while the sand is maintained at a temperature at or below 0.degree. C. (32.degree. F.). Foundry sands with clay binders have a water content to 1% to 15% by weight prior to being cooled.

REFERENCES:
patent: 4334574 (1982-06-01), Rennie et al.
patent: 5219123 (1993-06-01), Jacob
"If It's Black, Why Do They Call It Sand" by D. F. Hoyt, AFS Transactions 1995, vol. 103, pp. 353-360 (#95-100).
"Scanning Electron Microscope and Sand-Binder Studies: A 25-Year Review" by R. H. Toeniskoetter, AFS Transactions 1995, vol. 103, pp. 477-486 (#95-144).
"Sand Reclamation Project: Saginaw Malleable Iron Plant, GM Powertrain Group" by D. J. Couture, R. L. Havercroft and L. L. Stahl, AFS Transaction 1995, pp. 783-790 (#95-141).
"Evaluation of Reclaimed Green Sand for Use in Various Core Processes" by S. E. Clark, C. W. Thoman, R. H. Sheppard, R. Williams and M. B. Krysiak, AFS Transactions 1994 vol. 102, pp. 1-12 (#94-02).
"Thermal Reclamation The Evidence Against It" by D. S. Leidel, AFS Transactions 1994, vol. 102, pp. 443-453 (#94-10).
"Sand Binder Systems" Ashland Chemical Company, Foundry Management Technology (1996).

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