Annual report of the State Mineralogist for the year ending ... . \^i\vWwW^^Aw\J^vkvviUm>UmJ r; i; i ; i; r-c* &e o A. Hearth bottom. B. Iron plate. C. Lead pot. D. Iron beams. E. Forestone. H. Gutter. in the charge has been reduced, the material is scraped out and the slagsseparated from the oxysulphides formed by the operation. The latterare charged once more, with the addition of some lime, fuel, and a fewshovelfuls of ore. The process is thus practically continuous. To betterdivide the blast and prevent a concentration of heat on one point, a brickof peat is placed in front
Annual report of the State Mineralogist for the year ending ... . \^i\vWwW^^Aw\J^vkvviUm>UmJ r; i; i ; i; r-c* &e o A. Hearth bottom. B. Iron plate. C. Lead pot. D. Iron beams. E. Forestone. H. Gutter. in the charge has been reduced, the material is scraped out and the slagsseparated from the oxysulphides formed by the operation. The latterare charged once more, with the addition of some lime, fuel, and a fewshovelfuls of ore. The process is thus practically continuous. To betterdivide the blast and prevent a concentration of heat on one point, a brickof peat is placed in front of the nozzle. The reduced metallic lead grad-ually fills the sump and flows into a lead pot outside, from which it maybe ladled into molds. At the beginning of the operation a thick blacksmoke arises, which soon gives place to a strong current of lead fumes,which is conducted through more or less extensive flues into a rainchamber for the purpose of condensing and recovering it. THE AMERICAN HEARTH PROCESS.
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Keywords: ., bookcentury1800, booksubjectgeology, booksubjectminesandmineralr
