 | Metallurgy - 1878 - 568 pages
...contain some manganese. This is the reason why such a comparatively small initial bath is required. The proportion of refining materials to the whole charge averages 78 per cent. As soon as a charge is melted another is added, and so on until the operator thinks the time has come to assure... | |
 | James Stephen Jeans - Steel - 1880 - 962 pages
...contain some manganese. This is the reason why such a comparatively small initial bath is required. The proportion of refining materials to the whole charge averages 78 per cent. As soon as a charge is melted another is added, and so on, until the operator thinks the time has come to assure... | |
 | United States. Gun Foundry Board - Ordnance - 1884 - 102 pages
...proportion of ordinary pig containing no manganese. The greater part of the bath should be made ot pig poor in carbon, particularly when highly carbonized...the final additions. These consist of a special pig (11 per cent, of the whole charge) containing 4£ per cent, of silicon and 3£ of manganese, and also... | |
 | United States. Navy Dept - Naval art and science - 1884 - 648 pages
...successively added in small quantities. These are preheated and dropped at the deepest part of the hearth iu front of the doors. Preheating is employed not only...the final additions. These consist of a special pig (11 per cent, of the whole charge) containing 4£ per cent, of silicon and 34 of manganese, and also... | |
 | James Larkin - Brass founding - 1892 - 460 pages
...direct blooms. Materials inferior to these would correspondingly lower the quality of the product. The proportion of refining materials to the whole charge averages 78 per cent. " Slag-tests. — Spiegeleisen is used for the initial bath, because the manganese it contains, being... | |
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These are preheated and dropped at the deepest part of the hearth in front of the doors. Preheating is employed not only to keep the furnace hot, but to save oxidation. The materials used at this period of the operation are chosen with reference to the... 