Chemical engineering . he production ofahnninium from its oxide, but covers in general the idea ofliquifying refactory by dissolving them in a readilyfusible metallic oxide or mixture of such oxides, and then sub-jecting the liquid bath thus obtained to electrolysis in such amanner that only the metal desired is obtained, while theoxides acting as a solvent are not decomposed. In the case ofahnninium in particular,,the inventor takes oxide of lithiumand oxide of calcium in the proportion of four of the former•to one of the latter, which he fuses by the action of an alter-nating current
Chemical engineering . he production ofahnninium from its oxide, but covers in general the idea ofliquifying refactory by dissolving them in a readilyfusible metallic oxide or mixture of such oxides, and then sub-jecting the liquid bath thus obtained to electrolysis in such amanner that only the metal desired is obtained, while theoxides acting as a solvent are not decomposed. In the case ofahnninium in particular,,the inventor takes oxide of lithiumand oxide of calcium in the proportion of four of the former•to one of the latter, which he fuses by the action of an alter-nating current, so as not to decompose them. After the fusionof these oxides is complete, he adds oxide of aluminium tothe bath, which is stated to readily dissolve, and then subjectsthe bath to the action of a direct electric current for the pur-pose of producing metallic aluminium. The apparatus for car-rying out the electrolysis is shown in longitudinal vertical sec-tion in Fig. I. It consists of an iron box A, lined preferably. FIG. I.— APPARATUS. with carbon B, and covered by an insulating cover A, throughopenings in which pass the carbon electrodes G and T. Thelx)x forms the cathode, while the electrodes G serve as starting the apparatus an alternating current is passed be-tween the alternate carbon electrodes T, and the carbon liningof the box A, and arcs are produced by bringing the electrodesclose to the carbon lining. Lithium and calcium oxide in therequired proportion are then fed in and fused, the electrodesbeing gradually separated further and further, as the moltenmaterial accumulates in the vessel. Aluminium oxide is thenintroduced into the bath, and a direct electric current is passedbetween the carbon anodes G, and the carton walls of the ves-sel A. for the purpose of electrolyzing the aluminium com-pound. The metal accumulates on the txjttom and is with-drawn through tap hole K, by moving plug T. Instead ofusing the above solvent bath for the oxide o
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmetallu, bookyear1902
