A Practical Hand-Book for Miners, Metallurgists, and Assayers: Comprising the Most Recent Improvements in the Disintegration, Amalgamation, Smelting, and Parting of the Precious Ores Containing Gold, Silver, Copper, Tin, Quicksilver, Etc., Etc., with
A Practical Hand-Book for Miners, Metallurgists, and Assayers: Comprising the Most Recent Improvements in the Disintegration, Amalgamation, Smelting, and Parting of the Precious Ores Containing Gold, Silver, Copper, Tin, Quicksilver, Etc., Etc., with
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. 1867 Excerpt: ...some other metals. This mixture is subsequently heated in a distillatory furnace, and is thus freed from the adhering mercury, whilst the non-volatile constituents of the alloy are obtained in the solid form. Mr. Kilstel remarks: " The amalgamation in barrels is not adapted to ore containing gold. Unroasted ore has ...
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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. 1867 Excerpt: ...some other metals. This mixture is subsequently heated in a distillatory furnace, and is thus freed from the adhering mercury, whilst the non-volatile constituents of the alloy are obtained in the solid form. Mr. Kilstel remarks: " The amalgamation in barrels is not adapted to ore containing gold. Unroasted ore has been tried with chemicals unsuccessfully. The construction of the barrels does not differ much in the different works of Nevada Territory. They have a cylindrical shape, the diameter and depth being nearly equal. The staves are three or four inches thick. There are two sizes in use. The smallest, capable of receiving from one thousand to thirteen hundred pounds of ore, are thirty-two inches each way; the larger, receiving a ton of ore, measure from forty-four to forty-eight inches in the clear. AMALGAMATION IN DR. VEATCII'S STEAM-TUBS. The principle of this amalgamation, which is performed at the Central Works, (Virginia City, ) is, in regard to chemical procedure, the same as that of the barrel amal gamation. Chlorides and sulphates are decomposed by wrought-iron or copper plates. But while the barrels discharge the quicksilver after each amalgamation of a new charge, in order to save it from destruction by decomposition, the steam-tubs retain it for many charges, according to the richness of the ore. The quicksilver therefore takes an active part in decomposing the chlorides, forming calomel. In this combination the quicksilver is always lost. The steam has no chemical action, but it may influence the amalgamation by its temperature. In regard to the mechanical part of amalgamation, these tubs differ entirely from the barrel arrangement. They are wooden tubs about four feet deep and four feet in diameter. The bottom is made of castriron wit...
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