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| Number | Title | Issue Date |
| 7175691 | Method of producing stainless steel by re-using waste material of stainless steel producing process A method of producing stainless steel includes the steps of melting a raw material in an electric furnace to form molten steel, and then refining the molten steel by a refining furnace to produce stainless steel in a stainless steel producing process. In the method,... | 02/13/2007 |
| 6559082 | Insulating refractory material The invention concerns a crack-free insulating refractory material made from a composition comprising 20-80% by weight of a ceramic matrix, 5-40% by weight of insulating microspheres, 0.5-15% by weight of one more binders, 5-20% by weight of a metal or a ... | 05/06/2003 |
| 6136108 | Strontium master alloy composition having a reduced solidus temperature and method of manufacturing the same Master alloy with 20-80% strontium, preferably 0.01-2.0% of aluminum and/or copper, and the balance essentially zinc plus impurities, and a method for preparing same and a method for modifying the microstructure of nonferrous alloys with said master alloy... | 10/24/2000 |
| 6042660 | Strontium master alloy composition having a reduced solidus temperature and method of manufacturing the same Master alloy with 20-80% strontium, preferably 0.01-2.0% of aluminum and/or copper, and the balance essentially zinc plus impurities, and a method for preparing same and a method for modifying the microstructure of nonferrous alloys with said master alloy... | 03/28/2000 |
| 5871561 | Method of treating dusts containing oxides Dusts containing zinc and/or lead in the form of oxides and one or more reducing agents are mixed with each other before or after being introduced into a heat treatment furnace. The mixture is heated to a given temperature range under a substantial vacuum... | 02/16/1999 |
| 5685893 | Ore pelletization In an iron ore pelletization process in which particulate ore is mixed with particulate polymeric binder in the presence of moisture and the mixture is pelletised, the particulate binder is a blend of ionic synthetic water soluble polymer, such as a copol... | 11/11/1997 |
| 5464465 | Fiber bonded agglomerated ore materials Process for producing agglomerates, e.g., by pelletizing a particulate inorganic material for example an ore material, characterized by the addition to the agglomerated material of an organic fibrous material, especially a polyacrylonitrile fiber material... | 11/07/1995 |
| 4961777 | Pretreatment/agglomeration as a vehicle for refractory ore treatment An agglomerative heap leaching method for recovering gold, silver or other metals from low grade refractory ores. Hypochlorite compounds are incorporated directly into the ore agglomerates as they are formed. This provides ample time and opportunity for t... | 10/09/1990 |
| 4525207 | Process of producing briquettes to be charged to zinc-producing shaft furnaces Calcine which has been obtained by roasting in a fluidized bed and contains zinc oxide is briquetted at elevated temperatures. To produce briquettes having desirable properties for processing in a zinc-producing shaft furnace, the calcine is provided with... | 06/25/1985 |
| 4274878 | Sulphide pellet materials A substantially spherical pellet composed predominantly of lead sulphide which is coated with predominantly zinc sulphide material. The lead sulphide core is from 2-6 mm in diameter and the zinc sulphide coating has a thickness of from 1-3 mm. The weight ... | 06/23/1981 |
