. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. 28. 434 ARGALL ROASTER AND COOLER. 435 or bands, is a constant source of expense, besides causing the one setto pull against the other, greatly increasing the power required for account of the small diameter of the tubes, and their slow, steadymotion, the flue dust is reduced to a minimum; while the high terminalheat only possible in this form of a mechanical roaster thoroughly breaksup the sulphides, and gives the much-desired dead roast so essentialto successful ch
. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. 28. 434 ARGALL ROASTER AND COOLER. 435 or bands, is a constant source of expense, besides causing the one setto pull against the other, greatly increasing the power required for account of the small diameter of the tubes, and their slow, steadymotion, the flue dust is reduced to a minimum; while the high terminalheat only possible in this form of a mechanical roaster thoroughly breaksup the sulphides, and gives the much-desired dead roast so essentialto successful chlorination and cyaniding. The following are the generaldetails of this machine :— Roasting furnace complete ironwork only .... 63,600 lb. Fire tile lining required ....... 14 tons. Approximate firebrick required ...... 5>ooo »> ,, red brick ,, 20,000 ,, If the foundations piers of the roaster and firebox are built of stone,then 10,000 red brick will suffice. The capacity for 24 hours treatingCripple Creek ores and reducing the sulphur from 2 per cent, to oio percent, is from 45 to 50 tons, while the horse-p
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