Identifier: journalofele323271914paci (find matches)
Title: Journal of electricity, power, and gas
Year: 1899 (1890s)
Authors: Pacific Coast Electric Transmission Association
Subjects: Electrical engineering Electricity Gas manufacture and works
Publisher: San Francisco : Technical Pub. Co.
Contributing Library: San Francisco Public Library
Digitizing Sponsor: California State Library Califa/LSTA Grant

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
manufactured from pig iron, the productof the blast furnace, by oxidation of the superfluouscarbon and silicon in a Bessemer converter, by simplyblowing air through the molten bath. The product process. Small quantities—100 to 160 lb. usually—ofhigh grade and very expensive scrap, were melted upin clay and graphite crucibles, heated by oil, coke orgas. While the product of the crucible process canbe obtained in very good quality, the method has anumber of very great disadvantages. No refining can bedone. The raw material has to be of the same highquality as desired in the product. In making a bigcasting or ingot, the contents of several crucibles haveto be poured together, which causes great trouble intiming the pots to be ready at the same minute. Theanalysis of the steel will differ slightly in each pot,and in addition to all that the cost of fuel and cruci-bles make this process so expensive that the cost perton of molten metal varies from $65 to $85, and some-times even more.
Text Appearing After Image:
Stassano Electric Arc Furnace at Warman Steel Casting Plant, Los Angeles, Cal thus obtained invariably shows gas enclosures, theprocess is very difficult to handle, and faulty charges,are a frequent occurrence. Another way is the melting of pig iron and scrapin an open hearth furnace by means of gas producedfrom oil or coke. If this open hearth furnace is linedwith acid brick, it can do no refining, while if a basiclining is used the cost of production is increased, andin any event, the impurities contained in the meltingmedium—the gas—prevent to a certain extent the re-fining of the charge. Up to a few years ago, the only way to producea high quality of steel was by means of the crucible That is why the steel men the world over arewatching with keenest interest the developments ofthe electric process, which has proved in practice toremedy all these troubles. Among the hundreds of designs and methods forelectric furnaces invented and patented during thepast two decades, there are

Note About Images