E/MJ : engineering and mining journal . HEADFRAME AT THE HOLMES MINE OP THE CLEVELAND-CLIFFS IRON CO., [SHPEMINl MICH. The headframe is ,0 ft. high over all, anil is the highest on th It will have three crushers in It and is designed to crush and handle hoth hard and so t Olwill be 77 ft. high and will cany the No. 8 gyratory crusher, i ? The head-frame will be enclosed cm Hie working Hours. Theshafi has Foui partments, and will bi equipped with two skips and a A KEYSTONE DRILL PROSPECTING IN CALIFORNIA 832 ENGINEERING AND MINING JOURNAL Vol. 102, No. 19 niniin iii:!uiii!iuiiiuiiiiii
E/MJ : engineering and mining journal . HEADFRAME AT THE HOLMES MINE OP THE CLEVELAND-CLIFFS IRON CO., [SHPEMINl MICH. The headframe is ,0 ft. high over all, anil is the highest on th It will have three crushers in It and is designed to crush and handle hoth hard and so t Olwill be 77 ft. high and will cany the No. 8 gyratory crusher, i ? The head-frame will be enclosed cm Hie working Hours. Theshafi has Foui partments, and will bi equipped with two skips and a A KEYSTONE DRILL PROSPECTING IN CALIFORNIA 832 ENGINEERING AND MINING JOURNAL Vol. 102, No. 19 niniin iii:!uiii!iuiiiuiiiiiiii!i[i:;i:i:::!i:)ii iiiiiiliiiiiiiinim ,imce smhk . In the Journal of Feb. 19, 1916, which came into myhands only a few days ago, I have found, on p. 357 in thelittle article, High Titanium Products from Ilmenite,obviously erroneous data which I take liberty to the citation from IT. S. Pat. No. 1,156,220 it is said:. . This mass is still further heated to about 600°C, during which heating the titanium is decomposed, theiron sulphate remaining unchanged . . The ironsulphate is then leached with water, . . The temperature of decomposition of iron sulphates Iknow very well from experience, having made in 1906to 1909 careful studies on the roasting of mixed ironand copper pyrites in a plant in the South Tyrol. Thetemperatures were controlled with a thermoelectricpyrometer with autographic record. The chief resultsof my studies—as far
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectmineralindustries
