The Civil engineer and architect's journal, scientific and railway gazette . in manufac-turing oxide of zinc. First, as regards the treatment of the ores of zinc:—This pro-cess has usually been effected by first converting them into thestate of oxide, by roasting or calcination, and afterwards reducin;,-and distilling the oxides, by mixing them with coal, and submittingthem to great heat, in close vessels or retorts. This mode of ope-ration is attended with great disadvantages, for, besides occasion-ing great consumption of fuel, and rapid destruction of the re-torts, the product obtained is b
The Civil engineer and architect's journal, scientific and railway gazette . in manufac-turing oxide of zinc. First, as regards the treatment of the ores of zinc:—This pro-cess has usually been effected by first converting them into thestate of oxide, by roasting or calcination, and afterwards reducin;,-and distilling the oxides, by mixing them with coal, and submittingthem to great heat, in close vessels or retorts. This mode of ope-ration is attended with great disadvantages, for, besides occasion-ing great consumption of fuel, and rapid destruction of the re-torts, the product obtained is by no means proportionate to therichness of the ore. By this improved process the employment of retorts is entirelydispensed with, and the fuel and labour are greatly economised;the operation is also completely independent of the skill of theworkman or attendant; and, lastly, the loss of metal incidentalto the ordinary method is prevented. Besides these advantages,the patentee observes, that ores of lead and zinc may both be ope-rated upon at once by his improved inrj!? Fig. I. The principal feature of the invention consists in the reductionof roasted blend-ore (native sulphuret of zinc), and of the car-bonates, oxides, or silicates of zinc, and also of the sulphurets andoxides of lead, by the action of the reducing gases of a blast fur- 3U THE CIVIL ENGINEER AND ARCHITECTS JOURNAL. [NoVEJIBEB, nace • bv wliicli the scoria or slag is fused, the reduced zinc vola-tilised, iind the vapours condensed, and conducted into a receiverof a ])ceuliar form, situated over the mouth of the furnace, andheated by tlie gases therefrom. Fig. I represents a vertical section of the furnace, taken in aline ith tlie tuyere holes ; fig. 2 is an elevation of the same, onthat side where the aperture for charging is situated, the con-densers being shown in section ; and fig. 3 is an elevation of thefurnace, on the side where the tuyere pipes are situated, a, is theaperture or channel for c
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Keywords: ., boo, bookcentury1800, booksubjectarchitecture, booksubjectscience
