An electrometallurgical method for the production of calcium
AuthorLukasko, James John
AdvisorSmith, Ross W.
Mining & Metallurgical Engineering
StatisticsView Usage Statistics
An alternative electrochemical process for the production of calcium metal was developed. Other calcium production means are costly, complex, and inefficient. The method entailed an electrowinning step followed by an electrorefining operation. Calcium chloride was fed to the electrowinning cell with a potassium chloride-calcium chloriae eutectic electrolyte. The calcium was electrowon at 650 degrees Celsius into a molten tin cathode to 7. 5 weight percent calcium with 95 percent current efficiency. The resulting tin-calcium alloy served as the anode for the electrorefining cell which employed a calcium chloride-calcium fluoride fused salt as the electrolyte. Calcium metal was electrorefined at 850 degrees Celsius with a current efficiency of 85 percent. The recovered calcium metal analyzed 99.8 percent calcium, which is purer than commercial grades.
Online access for this thesis was created in part with support from the Institute of Museum and Library Services (IMLS) administered by the Nevada State Library, Archives and Public Records through the Library Services and Technology Act (LSTA). To obtain a high quality image or document please contact the DeLaMare Library at https://unr.libanswers.com/ or call: 775-784-6945.
Showing items related by title, author, creator and subject.
Lukasko, James John (University of Nevada, Reno, 1991)An alternative electrochemical process for the production of lead-calcium alloys used in battery and electrowinning anodes was developed. Other methods for the production of the alloy, Pb3Ca, are costly, complex, and ...
Experimental and field studies of scheelite in tactite deposits of the Stormy Day mine, Pershing County, Nevada Wilson, Geoffrey Evans (University of Nevada, Reno, 1975)Field work consisted of mapping and describing the Stormy Day mine in the Hooker mining district of Pershing County, Nevada, and a twelve square mile area surrounding the mines. The Stormy Day mine is a small contact ...
Mucosal inflammation results in altered contractility, calcium mobilization, and CaMKII signaling in colon smooth muscles. Qureshi, Sadeea (2011)Ulcerative colitis is an inflammatory bowel disease that causes malnourishment, weight loss, and bloody diarrhea in patients. Inflammation of the gut is associated with colonic dysmotility that changes mucosal functions ...