Transactions . )paratus employed for this is shown intransverse section in the accompanying sketch. It consisted of acentral rectangular retort. A, in which the ore was placed, and tworectangular chambers, CC, on either side of the retort, in whichgas was burned for the purpose of heating the ore in the retort. 446 A DIRECT PROCESS OF COPPER SMELTING. to tlie temperature of rapid deoxidation. The gas used for the re-duction was forced in at D at the top of the retort, found its waydownwards through the column of ore, and escaped from the bottom. of the retort, through the apertures, BB, mto th
Transactions . )paratus employed for this is shown intransverse section in the accompanying sketch. It consisted of acentral rectangular retort. A, in which the ore was placed, and tworectangular chambers, CC, on either side of the retort, in whichgas was burned for the purpose of heating the ore in the retort. 446 A DIRECT PROCESS OF COPPER SMELTING. to tlie temperature of rapid deoxidation. The gas used for the re-duction was forced in at D at the top of the retort, found its waydownwards through the column of ore, and escaped from the bottom. of the retort, through the apertures, BB, mto the combustion-cham-bers, CC. In the latter any CO which had not been oxidized toCO^ in passing through the retort, A, was burned. In addition tothis a further sup{)ly of gas was admitted into the chambers, C C,direct from the gasog^nes. As soon as the copper oxide had been thoroughly reduced thesupply of gas Mas stopped, both in the retort, A, and in the cham-bers, C C, and the charge was either dropped at once through thebottom of the retort into themelting furnace, or was allowed to coolin a non-oxidizing atmosphere. For i-egular working, a continuouslyworking furnace, with a cooling apparatus at the bottom, like Blairssponge furnace, would have been preferable. The gas injected into the column of ore contained from 6 to 13per cent, of The means of supplying the CO, was very consisted simply in keeping a thin layer of fuel in the gasogene. A DIRECT PROCESS OF COPPER SMELTING. 447 and in stirring it only at rare intervals;
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
