The sun., November 11, 1907, Page 7, Image 7
201089&ensp·&enspThe Library of Congress > Chronicling America > The sun. > November 11, 1907 > Page 7, Image 7. tirade rad galena and copper copperore coppeore ore or and the other la gold The last named namedhas namedhllll namedhas has been found to be eighteen inches Inch of a afour 1lour atour four foot drift of concentrating ore In a vein veinwho
A preliminary research on acid pressure
2011121&ensp·&enspCopper extractions of 85% were achieved while iron extraction was kept low at 18%. The ability to treat lowgrade copper sulphide ores is extremely important. A process that can handle the impurities and be cost effective will aid the development of these deposits.
The sun. [volume] (New York [N.Y.]) 18331916, October 18
201089&ensp·&enspmining development and prospecting Low Lowgrade Lowradf Lowgrade pects to encounter a large body bod of copper copperore cop r rlore lore ore at a depth of 300 feet In Its mine In the theCactus theCactua theCactu1 the extraction of ofbigh
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The oxidative leaching of lowgrade copper ore was investigated in the ammoniaammonium sulfate solution with ammonium persulfate.The effects of different parameters on the leaching of copper,including ammoniatoammonium ion ratio,total ammonia
Silver and gold: an account of the mining and
Those portions of the reports which discuss the geological, metallurgical, and mechanical problems involved in American mining have been widely studied, quoted, and discussed, and have done much, if I may credit the testimony which has reached me from many quarters, to increase the economy and success of the extraction and reduction of ores.
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AtoJs Online — Appendix to the Journals of the House of
20191121&ensp·&enspThe value of the ore is approximately ٠ per ton, extraction being by amalgamation and cyanide. Kelly and party (four men), who are working the old United Italy Claim above Lyell, have done a considerable amount of developmentwork during the year, and also won gold to the value of about 𧼐.
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