G.—B.

Some Results of Tests made by the Elmore Ore-concentrating Process on various Ores, Slimes, Tailings, etc.

56

Description of Ore. Original Assay. Assay of Concentrates. Assay of Tailings. Percentage of Values recovered in Concentrates. Eatio of Concentration. Copper. Silver. Gold. Copper. Silver. Gold. Copper. Silver. Gold. Copper. Silver. Gold. Copper-ore Per Cent. 7-1 7-6 3-9 3-6 1-58 3-40 Oz.lP.T. 3-9 2-67 0-33 0-73 Oz. P.T. 0-61 0-27 0-64 0-24 0-19 1-27 3-05 0-91 0-613 Trace 0-516 0-232 0-2 0-35 0-327 1-147 Per Cent. 14-6 10-9 19'1 11-5 7-8 8-0 8-40 3-0 29-0 9-0 12-1 10-8 8-1 145 15-31 13-10 9 00 15-65 Oz. P.T. 8-0 3-6 2-7 2-5 Oz. P.T. 1-28 0-39 3-00 0-60 Per Cent. Trace Oz. P.T. Trace 6-07 Trace Oz. P.T. Trace 0-09 Trace Per Cent. 95 0 94-0 94-0 97-0 84-0 91 0 Per Cent. 91-0 90-0 98-0 980 Per Cent. 92-0 94-0 90-0 96-0 950 96-8 97-5 96-0 98-0 930 77-0 94-0 900 74-8 88-85 97-80 2 to 1' 5-2 „ 1 3J „ 1 5 „ 1 2* „ 1 5| „ 1 7 „ 1* 3-5 „ 1 10 „ 1 5-1 „ 1 2-4 „ 1* 2J „ 1 5 „ 1 3* „ 1 3 „ 1 7 „ 1 7 „ 1 ii ii i 12J „ 1 3J „ 1 12A „ 1 5" „ 1 6| „ 1 7* „ 1 12J „ 1 12| „ 1 Tailings from a water-concentrating plant Copper-ore Gold-ore (telluride) 1-74 0-10 0-24 5-0 0-51 6-1 18-3 3-79 6-13 6-11 Trace Trace Trace 0 05 019 Trace 93-0 i-5 Trace South African gold-ore Antimonial gold-ore (tailings) Copper-ore Silver-ore Magnetic oxide, with copper-pyrites Copper-ore 3-0 1-15 11-5 2-2 4-3 2-8 3-6 005 6-5 32-0 16-2 65-4 0-30 0-30 0-60 0-45 0-08 0-05 Trace 0-90 7-0 90-3 85-2 940 80-0 97-0 98-0 96-0 80-0 87-3 1-90 1-78 1-41 0-14 0-14 5-6 7-4 3-5 0-6 1-5 0-66 0-75 3-8 2-4 Trace Trace 98-0 99-0 95-0 90-0 900 Antimonial gold (tailings) „ (slimes) Magnetic oxide, with copper-pyrites Slimes from silver-mines Copper-ore Pulp from battery-table (silver-ore) Magnetic oxide, with copper-pyrites Copper-pyrites in quartz „ slate Transvaal banket West Australian gold-ore 3-6 4-4 3-20 1-80 2-80 16-2 23-5 153 220 2-0 3-5 0-33 0-62 0-08 015 0-04 4-1 60 6-17 Trace Trace 0-1 92-0 89-6 98-0 93-0 98-7 77-0 .76-5 0-20 1-30 2-55 3-25 3-627 13-060 0-067 1-000 0-039 0-025 70-67 21-90 Cinnabar (quicksilver) ore Mercury. 0-50 1-24 1-75 Mercury. 11-00 13-10 19-00 Mercury. 0-023 0075 0-200 Mercury. 96-0 95-2 90-0 21 „ 1 12 „ 1 16 „ 1 *M early.