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| Number | Title | Issue Date |
| 6458182 | Process for producing high-purity Mn materials A process for producing a high-purity Mn material comprising the steps of premelting crude Mn at 1250-1500° C. and vacuum distilling the melt at 1100-1500° C. The degree of vacuum during the vacuum distillation ranges from 5×10-6 torr to 10 ... | 10/01/2002 |
| 5735933 | Method for processing metallic waste A processing method by which metals may be recovered at a high purity from metal-containing waste materials. The method for processing metal-containing waste materials comprises crushing a metal-containing waste material to a particle size of 1-50 mesh, s... | 04/07/1998 |
| 5462579 | Method and apparatus for manufacturing medium or low carbon ferromanganese An object of the present invention is to provide method and apparatus for manufacturing medium or low carbon ferromanganese at reduced running costs. In order to achieve the above object, the present invention resides in charging molten high carbon ferrom... | 10/31/1995 |
| 5358548 | Condensation of metal vapors in a fluidized bed and apparatus Metal vapor, for example zinc fume in the offgas of a smelting furnace, is captured by bringing the stream into direct contact with a fluidized bed of solid particles having a particulate loading of greater than 10 kg/m3 and preferably greater ... | 10/25/1994 |
| 4752327 | Dephosphorization process for manganese alloys A method for dephosphorizing a manganese alloy by first desiliconizing the alloy to a level below 0.6%, and then dephosphorizing the low silicon alloy with barium carbonate or barium oxide in combination with an oxidizing agent. The lower the silicon cont... | 06/21/1988 |
| 4684403 | Dephosphorization process for manganese-containing alloys A method for dephosphorizing a manganese containing melt is disclosed. The method encompasses the addition of a magnesium compound to a manganese containing melt to form magnesium phosphides which are removed from the melt. The method is carried out under... | 08/04/1987 |
| 4416692 | Process for extracting gold, silver, platinum, lead, or manganese metals from ore A process for extracting metals having lead affinity from mineral ores. The process is in steps including, pulverizing the ore material, drying the ore, melting elemental lead in a melting chamber and maintaining the molten lead within a preselected tempe... | 11/22/1983 |
| 4354868 | Process for the desiliconization of manganese alloys The invention concerns a process of desiliconization of manganese alloys in the liquid state. By injecting carbon dioxide into the liquid alloy, which injection can be effected by an additional neutral gas, or oxidizing agent, the silicon is oxidized to S... | 10/19/1982 |
| 4274871 | Method of obtaining manganese alloys with a medium carbon content The invention concerns a method of obtaining manganese alloys with an average carbon content by reacting liquid, carbon-containing ferro-manganese in a fluid tight chamber. Oxygen, mixed with a heat regulating gas such as CO2, air, nitrogen, ar... | 06/23/1981 |
| 4161399 | Method for electroslag remelting of a manganese-copper-nickel alloy A manganese-copper-nickel alloy is remelted to form high quality ingots or slabs which are capable of undergoing hot-working in the "as cast" form by electroslag remelting the alloy under a flux composition prepared by fusing a mixture consisting essentia... | 07/17/1979 |
| 4139370 | Method of refining ferro-alloys A ferro-alloy, namely ferrochrome or ferromanganese, is refined by being heated to at least 100° C above its melting point to form a bath whereupon oxygen is blown into the melt, below the bath surface, within a protective gas envelope. The rate of oxyge... | 02/13/1979 |
| 4130417 | Process for refining high-carbon ferro-alloys A hign-carbon ferro-alloy, specifically ferrochrome or ferromanganese, is carburized in a converter in which oxygen or air is blown from below into the melt together with a surrounding protective gas. With the bath preheated to a temperature somewhat high... | 12/19/1978 |
