Leaching Gold And Silver Ores - The Plattner And Kiss Processes - A Practical Treatise

Leaching gold and silver ores : The Plattner and Kiss processes. A practical treatise - 1841 - Prefzce .......-....................................................... 6 Introduction .......................................................... 5 . Roasting ........................................-.................... 16 Oxidizing roast ................................................. 16 Deadroast ..................................................... 16 Chloridizing roast .............................................. 17 Apparatus ............,............................................. 21 Roasting furnaces .................................. , . ......... 21 Reverberatory furnace ................................ . . ...... 22 Furnace tools ................................................. 30 Crosbysfurnace ............................................... 30 Leachiugvat ................................................... 31 Suction pipe .................................................. 32 Vent pipe .................................................... 33 Sieve ......................................................... 34 Precipitating vat ................................................ 35 Troughs ...................................................... 36 TVell ......................................................... 36 Pumps ......................................................... 36 Filters ..........,............................. ................ 36 Press ......................................................... 37 Chlorine Generator .............................................. 37 Wash-bottle .................................................. 39 Special Directions for working-A . Concentrated pyrites containing gold ........................ 41 Roasting .................................................. 43 Chargingthe vat ........................................... 48 Chlorinatim .............................................. 49 Making chlorine ............................................ 51 . Leachingthe gold .......................................... 53 Precipitating the gold ..................................... 57 Iron sulphate solution ....................................... 59 Collecting the gold ......................................... G0 Washing the gold ......................... , ................ il Drying the gold ........................................... 62 Meltingthegold .......................................... 62 . B . Concentrated pyrites containing gold and silver ............... 65 Roasting ................................................... 65 Leaching the silver ......................................... 67 Precipitation of silver ....................................... 70 Collecting the precipitate ................................ , ... 73 Roasting the precipitate .. , ................................. 73 Meltingthesilver .......................................... 73 C . Concentrations containing silver, but little or no gold .......... 75 Roasting .................................................. 75 Washing the ore ........................................... 77 D . Concentrations rich in gold and silver, and containing lead, c .. 70 E . Unconcentratedores ................ . . . . . . . . . . . . l . . . . . . . . . . . S0 F . Ores containing coarse gold .................................. S2 Calcium polysulphide ....................................... S3 Calcium hyposulphite ....................................... S8 Workingtest ............................................... 86 Changeinweight ..........................  more