Transactions . a (a crystalline mixture of tin and iron). Smelting150 kg., plus 20 kg. plomillo, yields 10 kg. tin and an undeter-mined quantity of plomillo, using 3 of charcoal to 1 of ore. A sample of concentrates from the Queensland mill, knownto run about 15 per cent, of metallic tin by wet analysis, andweighing 100 kg., was washed in a batea down to 50 kg. andsmelted in this furnace. It required 6 hours to run 50 kg. ofconcentrates, including remelting of slags, with a charcoal-consumption of 100 kg. The produce was kg. of tin kg. of impure tin, hardhead and dirty slags. Probab
Transactions . a (a crystalline mixture of tin and iron). Smelting150 kg., plus 20 kg. plomillo, yields 10 kg. tin and an undeter-mined quantity of plomillo, using 3 of charcoal to 1 of ore. A sample of concentrates from the Queensland mill, knownto run about 15 per cent, of metallic tin by wet analysis, andweighing 100 kg., was washed in a batea down to 50 kg. andsmelted in this furnace. It required 6 hours to run 50 kg. ofconcentrates, including remelting of slags, with a charcoal-consumption of 100 kg. The produce was kg. of tin kg. of impure tin, hardhead and dirty slags. Probably iffurther treated the recovery in clean tin would have been about6 kg., with a loss of 9 kg. on the original content of 15 furnace- and washing-losses were therefore about 60 percent, of the total tin in the ore. The cost of smelting 50 ore was $ (Mex.). This Mexican furnace is inferior in design to the Portuguese TIN-MINING AND SMELTING AT SANTA BARBARA, MEXICO. 231 WOODENSCREEN HANDBELLOWS. ? .j -1-2- TAPPING RODSHOD WITH IRON STCNE 5x9 TAP HOLE REFRACTORY LINING — — — ~~_<;- SECTIONAL ELEVATION.
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
