Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 416
undum is another electric furnace product whichhas a commercial value as an abrasive, also as a highly refractorymaterial. Alundum is the trade name given to fused aluminumoxide. It is made by first purifying bauxite and then fusing it in anelectric arc furnace. The furnace consists of a circular… … Fig. 36. Alundum MufflesCourtesy of The Norton Company quantity of the fused material has formed, the solidified material isremoved and broken up, crushed, and graded. From the finely crushed material, grinding wheels are formed,and it is also used in the construction of crucibles and muffles such…
Electrical engineering
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