ISBN: 9781236303479

RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 138 pages. Dimensions: 9.7in. x 7.4in. x 0.3in.This historic book may have numerous typos and missing text. Pur… Plus…

RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 138 pages. Dimensions: 9.7in. x 7.4in. x 0.3in.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. 1847 Excerpt: . . . taking care to stop short of such a heat as would cake or fuse the powder, and I keep the powder regularly stirred at intervals during the whole time. I now remove the powder from the calcining furnace to a fusing or metal furnace, taking the precaution to sprinkle it with water when drawn from the calcining furnace as is usually practised, and to every ton weight of this powder I add in the fusing furnaceabout one cwt. of anthracite coal also in powder, and l0 lbs. of sand, adding, ifI find it difficult to fuse, lime or fluor spar as a flux. When the whole is well fused, I skim off the slag, and tap the furnace into sand. The product thus run out, I have generally found to be fit for the refining furnace, and I subsequently refine it in the usual manner; but if, as in practice will sometimes happen, a small portion of the product should be regulus, this regulus, which is rich in copper, I roast, and afterwards refine. The slag skimmed off as above, contains copper, and may he employed as usual with charges in the ore furnace as a flux. I have thus described, as accurately as I am able, the method I prefer to carry out my improvements in smelting copper ores, butl wish it to be understood, that I do not confine myself to the details thereof, as the proportions of the ingredients, the mode in which, and the stage at which the iron and alkaline substances are added, and the duration of the processes may be varied. I have found potash and its carbonates to produce a similar effect to soda and its carbonates. But what I claim is, the application of iron with alkaline substances to the smelting of copper ores, and the decomposing and disintegrating, by means of water, the product obtained by such application. --In witness, and c. JAMEs N. -amsn. En. . . This item ships from La Vergne,TN., RareBooksClub<