. Appleton's dictionary of machines, mechanics, engine-work, and engineering. 405- either in the same furnace, or, as in most cases, in a separate or smelting-furnace. Such a furnace isrepresented in Figs. 2832, 2833, showing the plan and section of it; here A B is the hearth, C the fire-place, L the hopper, and K M a receiving-pot filled with water, in which the copper is granulated. Inthe second operation, or smelting, some copper is produced along with the matt or slag, which is sep-arated and treated in a peculiar way. The matt, which contains but little copper, is returned to the cal-cine
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. 405- either in the same furnace, or, as in most cases, in a separate or smelting-furnace. Such a furnace isrepresented in Figs. 2832, 2833, showing the plan and section of it; here A B is the hearth, C the fire-place, L the hopper, and K M a receiving-pot filled with water, in which the copper is granulated. Inthe second operation, or smelting, some copper is produced along with the matt or slag, which is sep-arated and treated in a peculiar way. The matt, which contains but little copper, is returned to the cal-cined ore, and smelted along with it. In this operation fluxes are added in case the ore does not con-tain sufficient flux for smelting. Iron forms the best flux, and for these reasons : copper pyrites, whichalways contain more or less iron pyrites, are the most profitable ores in the smelting operation. Otherfluxes are the metallic oxides of manganese, lead and tin, besides which, lime, fluor-spar, or other fluxesare used. 2824. r^^rnStnSSfe 3P=^ sgBiioaMl^g ij^^^^iBa
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
