Chemical engineering . ound in the course of eighteen months orso. Platinum is unchanged at 8is. 6d. per ounce. The onlyhope for a fall in the price lies in the ending of the Russo-Japanese war, which will permit of the development of otherplatinum mines. Copper has remained fairly steady, weaken-ing slightly towards the end of the month. Cleveland pig ironhas fallen to 48s. od. Block tin is still falling, being nowquoted at £131 to £132 per ton. as against £ to £135at the beginning of the month. Ingot and sheet lead haveeach fallen 5s. od. per ton. being now quoted at £ and£
Chemical engineering . ound in the course of eighteen months orso. Platinum is unchanged at 8is. 6d. per ounce. The onlyhope for a fall in the price lies in the ending of the Russo-Japanese war, which will permit of the development of otherplatinum mines. Copper has remained fairly steady, weaken-ing slightly towards the end of the month. Cleveland pig ironhas fallen to 48s. od. Block tin is still falling, being nowquoted at £131 to £132 per ton. as against £ to £135at the beginning of the month. Ingot and sheet lead haveeach fallen 5s. od. per ton. being now quoted at £ and£ , respectively. London, February 4. ANALYSIS OF CURRENT HLECTROCHHMICAL PATENTS. By George P. Schoix, Ph. D. Electric \ces and Furnace of Separating Metals .from their Ores.—J. M. AGerard, Paris. France. Patent 780,651, Jan. 24, 1905. Ap-plication filed Jan. 27, process relates especially to the production of steel di-rectly from the ore, and is carried out in the furnace Fig. FIG. I.—electric steel FURNA< ! The structure comprises a shaft furnace as well as a reverber-atory, and in the former the ores are reduced to iron sponge,while in the latter the sponge, which has been melted in thelower part of the reduction furnace, is refined. .\ gas pro-ducer is also a part of the apparatus. The iron ore, mixedwith a suitable quaiuity of reducing agent and flux, if thelatter is required, is charged into the hopper T, from which itpasses into the furnace H by means of a bell C. At the place where the furnace bosh joins the hearth, a pair of electrodesL L are located, which serve the purpose of nieltiug the re-duced material and the gangue. .\ discharge channel D, lo-cated at the top of the conduit M serves for drawing off theslag. The molten metal falls into this conduit M, which con-nects the reducing part of the apparatus with the reverbera-tory part. An opening O in the bosh of the apparatus servesfor the discharge of the furnace at t
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmetallu, bookyear1902
