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Author: Thomas Arthur Rickard
Publisher:
ISBN:
Category : Gold
Languages : en
Pages : 298
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Book Description
Author: Thomas Arthur Rickard
Publisher:
ISBN:
Category : Gold
Languages : en
Pages : 298
Get Book Here
Book Description
Author: Thomas Arthur Rickard
Publisher:
ISBN:
Category : Gold
Languages : en
Pages : 290
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Book Description
Author: Thomas Arthur Rickard
Publisher: Franklin Classics Trade Press
ISBN: 9780344029301
Category :
Languages : en
Pages : 294
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Book Description
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: Thomas Arthur Rickard
Publisher: Theclassics.Us
ISBN: 9781230279237
Category :
Languages : en
Pages : 80
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Book Description
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 edition. Excerpt: ...it. The blanket washings are very poor. The North Cornish mill is not in the town of Ballarat, though in the mining district of that name, but at Daylesford. The plant consists of 50 stamps, and the rate of drop varies from 70 to 75 per minute, the height of the drop being 8 inches. The depth of discharge or issue is extremely irregular. When starting with new dies or false bottoms the top of the die is approximately level with the bottom of the grating and the depth of discharge is practically nil, but as the dies wear down (they are 4 inches deep) the issue in Near the famous Canadian lead, which yielded so many of the large nuggets. creases to a maximum of a little over 3 inches. The mill crushes 90 long tons per day, or 2,450 tons per month. The amalgamation is effected by methods similar to those described as in use at the Star of the East. Scarcely 11 per cent. of the amalgam obtained comes from the mortar boxes. Much the largest proportion is derived from the skimmings of the wells and in the blanket sands. The latter are treated by Eerdan pans, of which there are six. The tailings from the Berdans go to a Frue vanner for after-treatment. This is a comparatively new mill, the oldest portion being five and the newest two years old. The quantity of ore in sight in the mine is such as to have led to the consideration of a further addition to the number of stamps. The mine has paid large dividends for alongperiod.f Notwithstanding these facts the mill is miserably incomplete. Although very favorably situated and having all the fall required for an automatic arrangement of its parts, it is unprovided with rockbreakers or self-feeders. In the feeding of the 50 stamps there are employed upon each shift 5 men at 30 shillings per week, ..
Author: T. A. Rickard
Publisher:
ISBN: 9780282872199
Category : Technology & Engineering
Languages : en
Pages : 290
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Book Description
Excerpt from The Stamp Milling of Gold OresThe matter thus collected is rather a painstaking description of practice than a discussion of the chemistry and mechanics of the stamp-milling process. It Will, therefore, it is believed, be serviceable to those engaged in the actual work of the mill, no less than to the student in the laboratory or lecture room.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Georgius Agricola
Publisher: Courier Corporation
ISBN: 0486318397
Category : Science
Languages : en
Pages : 674
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Book Description
One of the most important scientific classics, and first to offer detailed technical drawings illustrating mining techniques, field research, and the earliest scientific methods. Translated by Herbert Hoover. 289 woodcuts.
Author: John Butler Johnson
Publisher:
ISBN:
Category : Engineering
Languages : en
Pages : 1060
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Book Description
Author: Thomas Kirke Rose
Publisher:
ISBN:
Category : Gold
Languages : en
Pages : 654
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Book Description
Author: James E. Fell, Jr.
Publisher: University Press of Colorado
ISBN: 0870819682
Category : History
Languages : en
Pages : 368
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Book Description
This comprehensive treatment of the smelting industry of Colorado, originally published in 1979, is now back in print with a new preface by the author. Packed with fascinating statistics and mining data, Ores to Metals details the people, technologies, and business decisions that have shaped the smelting industry in the Rockies. Although mining holds more of the glamour for those in and interested in the minerals industry, smelters have continuously played a critical role in the industry’s evolution since their introduction in Colorado in the 1860s. At that time, miners desperately needed new technology to recover gold and silver from ores resistant to milling. Beginning as small independent enterprises, progressing to larger integrated firms working in urban centers, and finally following a trend toward mergers, the entire industry was absorbed into one large holding company—the American Smelting and Refining Company. Over time, fortunes were won and lost, business success was converted to political success, and advances were made in science and metallurgy. Drawing on archival material, Fell expertly presents the triumphs and troubles of the entrepreneurs who built one of the great industries of the West.
Author: Clement le Neve Foster
Publisher:
ISBN:
Category : Mining engineering
Languages : en
Pages : 846
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Book Description
