The Foam Book
Aqueous Foam Technology References 
The Aqueous Foam Technology Book

SULFUR MINING

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Introduction Academic.html Aircraft Deicing Asbestos Removal Blasting Explosions CFI CoalMining Drain Time Dust Control Emission Control Foam Compression Foam Equipment Foam Slurry FrostProtection Government Herbicide Foam Military Defense Law Mine Fires Oil Recovery Pest Control Foam Sanitary Landfills Special Cleaning Sulfur Mining Wafer Cleaning References Appendix Consultative Services Contact Information Papers by Author Patents by Inventor Patents by Number

SULFUR MINING

Folk, S.H., U.S. Patent 4,413,859, November 8, 1983.
Mining Sulphur with Foam Barrier

Comment - a clever use of foam, but the chosen composition was not up to the task.  Frasch sulfur mining has been restricted to only a single company, Freeport McMoRan, but recent corporate conversions make development of this technology difficult.

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UPDATED, 01/06/10 10:29 AM
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