Bulletin . from these oreshave been calculated andplotted in figure 4, tomake the results compar-able with those in the various orestested vary widely in leadcontent, it is a strangecoincidence that in only afew ores will the use ofmore than 150 pounds ofsulphuric acid per ton ofore give a higher extrac-tion of lead than is obtainable with that amount of acid. In thoseexperiments, however, the mam consideration governing the amountof acid used was the possible extraction of the silver in the the data on the lead extractions are only of technicalinterest. TESTS OF
Bulletin . from these oreshave been calculated andplotted in figure 4, tomake the results compar-able with those in the various orestested vary widely in leadcontent, it is a strangecoincidence that in only afew ores will the use ofmore than 150 pounds ofsulphuric acid per ton ofore give a higher extrac-tion of lead than is obtainable with that amount of acid. In thoseexperiments, however, the mam consideration governing the amountof acid used was the possible extraction of the silver in the the data on the lead extractions are only of technicalinterest. TESTS OF TAILING FROM WTLBERT DUMP. Two of the samples that seemed to give the best acid efficiencieswere the Wilbert tailing and the Scranton ore. These were chosenfor further experimentation. It was necessary to know the mini-mum time required to extract the lead and the minimum amountof brine that woidd hold it in solution. It also seemed possiblethat the application of stronger acid solutions would dissolve the. 20 <?0 GO SO /OO /20 /40 /<SO /&O ^VO^O 1&4& &rr/B4cr£-&, ^oc//vos /?<r/? rosy Figure 4.—Corves showing relation of load extraction to con-sumption of acid in second series of leaching test 3 wi I h acidi-fied brine. /, tailing from Ontario dun: -fromBullionville dump; slimes from Eureka Hill dump; 4 to 7,Michigan-Utah ores; 8, Chief Consolidated ore; 9, slimesfrom Copper Queen dump; 10, Shattuckore; //, tailing fromDry Valley dump; tt, tailing from Daly West dump; IS,slimes from Bullion Beck dump; 14, Nevada United ore. 28 INNOVATIONS IX METALLURGY OF LEAD. lead faster than weaker acid solutions containing the same weight of acidin a greater volume of brine. All of these points were tested on a sam-ple of the Wilbert tailing, of the screen analysis given in Table 5 (p. 19).The charges consisted of 100 grams of ore, usually with 1,000 c. saturated brine unless otherwise stated. The material was placedin ordinary acid bottles, which were p
Size: 1317px × 1897px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
