This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 Excerpt: ...Pb. The loss by volatilization is greater with a charge low in Pb than with one that is high; the loss in Ag depends mainly on the loss of Pb. 151. Calculation of Charge by Algebraic Method.--The ore for which the charge is to be calculated is a carbonate containing some gaWa. Its composition is given in Table 68. A ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 Excerpt: ...Pb. The loss by volatilization is greater with a charge low in Pb than with one that is high; the loss in Ag depends mainly on the loss of Pb. 151. Calculation of Charge by Algebraic Method.--The ore for which the charge is to be calculated is a carbonate containing some gaWa. Its composition is given in Table 68. A few assumptions have to be made in the calculation in order to simplify the work. The S-content is supposed to be all sulphide-S. If part of this S were sulphate-S, a correction would have to be applied, as in the presence of both sulphide-and sulphate-S, or even of sulphate-S alone, from 15 to 40 and even 50 per cent. of the S passes off as SO2 and does not enter the matte. All the As is accounted for in the speiss, whereas ore blast furnaces in our days are usually run in such a manner as to avoid the formation of speiss, most of the As passing off with the gases, and some entering the lead bullion and matte. The Zn present is figured as entering the slag, in which it replaces an equivalent amount of CaO, though in reality perhaps only 80 per cent. does this; the rest being volatilized or entering the lead bullion, matte and flue-dust. No account is taken of the losses in Pb, Ag and Au. The three metals are assumed to be collected in the lead bullion, though as a matter of fact, one part is lost, and another goes into intermediary products, especially matte and flue-dust. It will be noted that the analysis shows no F. If this were present, a certain amount of Ca, equivalent to that required by F to form CaF2, would be rendered unavailable as basic flux. The actual deviations from assumed figures vary with the character of ore and slag, and the working of the furnace, so that the results of a computation usually do not correspond accurately wit...
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Add this copy of Metallurgy of Lead to cart. $27.44, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of Metallurgy of Lead to cart. $37.75, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of Metallurgy of Lead to cart. $61.90, new condition, Sold by Booksplease rated 3.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2022 by Legare Street Press.
