All: Many years ago, a shop teacher at an Indianapolis High School knew I was a caver. He offered me 3 very large cans of Carbide. At one time they used the carbide for their welders. The carbide was filled with "dust" even though the cans were not opened. I obtained several gallon size paint cans of the fine grade carbide by screening the original cans. The Central Indiana Grotto used the carbide for several years. The fine grade reacted faster, but otherwise worked fine. The cans were very old even in the 1960's. I'm not sure how old the carbide was, as the school used tanks for some time. The school was an arsenal in the civil war era before being converted to a high school. The shop building basement was used to keep horses. And the administration building on campus had very thick walls. Bill Tozer
In a message dated 8/23/2012 8:47:50 P.M. Mountain Daylight Time, mmin...@caver.net writes: Calcium carbide is mainly used for production of acetylene for welding where it is not available in tanks.
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