Information Concerning Manganese Ore (Classic Reprint)
| Preis: | 10.95 EUR* (inkl. MWST zzgl. Versand - Preis kann jetzt höher sein!) |
| Versand: | 0.00 EUR Versandkostenfrei innerhalb von Deutschland |
| Partner: | buecher.de |
| Hersteller: | Forgotten Books (Commission, United States Tariff) |
| Stand: | 2015-08-04 03:50:33 |
Produktbeschreibung
Excerpt from Information Concerning Manganese Ore Manganese ore is the raw material for ferromanganese or spiegeleisen, products essential to the manufacture of steel. Minor amounts of the ore are required by chemical and other industries, but 96 percent of the consumption is for making steel. Prior to the European war the United States produced less than 1 percent of its manganese requirements. The remainder was imported mainly from India, Russia, and Brazil in the form of ore and from Great Britain in the form of ferromanganese. Under war conditions the first two countries were practically eliminated as sources of supply. Domestic production of high grade (i.e., 35 percent or more manganese) ore, used largely for making ferromanganese, increased from 4,063 tons in 1913 to about 294,000 tons in 1918. Production of low-grade (less than 35 percent manganese) ore, used partly for making spiegel and partly smelted direct in iron furnaces, increased from 85, 588 tons in 1913 to over 1,079,000 tons in 1918. The number of mines increased from 75 in 1917 to 325 in 1918. The industry was also considerably expanded in Brazil and in Cuba. The large supplies from these nearer countries together with the increased domestic output proved greater than even the enormously expanded needs of this country. The United State.-; became independent of British ferromanganese and of Indian and Russian ore. Manganese mining on a large scale in the United States, however, is an artificial industry. Under normal trade conditions, with a free movement of ore from foreign countries, it can not continue except on a very limited output. The domestic resources have been carefully estimated and found to be insufficient to supply domestic requirements for more than a very few years. The cost of mining is relatively high, but that is not the only determining factor. The domestic ore is relatively low grade, obtainable in only small lots 1 and variable in character. Any large dependence on domestic supplies involves the rapid depletion of our limited reserves and a loss in efficiency due to the use of lower-grade material by the consumers aside from the increased cost of domestic ore as compared with the cheaper and more desirable foreign product. The foreign resources are practically inexhaustible and are high grade. They are easily accessible and must eventually furnish the Ame ican supply, regardless of any temporary expedients that may lead to the continuance of domestic mining. During the war period a number of mines were opened up and equipped for the purpose of providing manganese as a necessity in the war program. Many of these properties failed to return the capital invested up to the time of signing the armistice. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This 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.
* Preis kann jetzt höher sein. Den aktuellen Stand und Informationen zu den Versandkosten finden sie auf der Homepage unseres Partners.
Folgende Produkte könnten dir ebenso gefallen
