The hydrometallurgy of copper . d Long Reverberatories.—An important modification of thelong reverberatory, especially for copper roasting, is shown in Figs. 10,11,and 12. Fig. 10 shows a longitudinal section; Fig. 11 the plan, andFig. 12 a transverse section through the front of the furnace at the pro-tecting arch and discharge openings in the hearth. One of the difiiculties in hand reverberatories in roasting ore for thehydrometallurgical processes is the liability to fuse the ore near the fire E. C. Vorhies, Scientific and Mining Press, March 26, 1904. 100 HYDROMETALLURGY OF COPPER end, whe
The hydrometallurgy of copper . d Long Reverberatories.—An important modification of thelong reverberatory, especially for copper roasting, is shown in Figs. 10,11,and 12. Fig. 10 shows a longitudinal section; Fig. 11 the plan, andFig. 12 a transverse section through the front of the furnace at the pro-tecting arch and discharge openings in the hearth. One of the difiiculties in hand reverberatories in roasting ore for thehydrometallurgical processes is the liability to fuse the ore near the fire E. C. Vorhies, Scientific and Mining Press, March 26, 1904. 100 HYDROMETALLURGY OF COPPER end, when the fire is urged sufficiently to ignite the charge at the chloridizing roasting a similar difficulty presents itself. In order toeliminate the sulphur sufficiently in hearth section No. 2, by oxidizingroasting, a temperature nearly as high as the ore will stand without fusingis desirable to expedite the process as much as possible. To accomplishthis the ore in section No. 3 may become unduly heated, even if it does. Fig. 13.—Modified hand reverberatory. Longitudinal section. not approach the sintering point. The temperature for chloridizingroasting should be the lowest at which the reactions take place, and thiscondition conflicts with that required for efficient roasting in the middleand rear end of the furnace. To overcome these difficulties, a protecting arch is thrown oversection No. 3, as shown in Figs. 10 and 12, which shields the ore from the
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