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| Number | Title | Issue Date |
| 6409793 | Method for processing steel slags containing chromium A method for processing steel slags and optionally iron carriers such as, e.g., electric furnace slags, converter slags, dusts derived from steel production, mill scale or secondary metallurgical residues, in which the molten steel slags or iron carriers ... | 06/25/2002 |
| 6395054 | Process for producing pozzolanes, synthetic blast furnace slags, belite or alite clinkers, or pig iron alloys from oxidic slags A process that produces pozzolanes, synthetic blast furnace slags, belite, or alite clinkers, as well as pig iron alloys, from oxidic liquid slag. The oxidic liquid slag is reduced above an iron bath in a reactor containing submerged tuyeres. Carbon is bl... | 05/28/2002 |
| 6364929 | Method for reprocessing steel slags and ferriferous materials The invention relates to a method for processing steel slags and iron carriers such as, e.g., electric furnace slags, converter slags, fine ores, dusts from the production of steel and millscale, for recovering pig iron and environmentally safe slags. A m... | 04/02/2002 |
| 6319434 | Method for granulating and grinding liquid slag and device for realizing the same In a process for granulating and disintegrating molten slags, in particular blast furnace slags, with water, a compressed water jet is directed into the slag and the slag is ejected as the jacket of the compressed water jet. The device for carrying out th... | 11/20/2001 |
| 6261340 | Method for transforming slag derived from non-iron metallurgy In a method of converting slags derived from nonferrous metallurgy, in particular primary and secondary Ni and Cu metallurgical slags, while recovering and/or enriching the nonferrous metals and forming synthetic puzzolans, the molten oxidic slags are red... | 07/17/2001 |
| 6251160 | Method of de-chroming and/or depleting the MgO content of steel slag In a process for dechroming, and/or depleting the MgO content of, steel slags, oxygen is introduced into the liquid steel slag to an extent sufficient for converting iron quantitatively to iron oxide and at least 5% by weight of the iron oxide contained i... | 06/26/2001 |
| 6245123 | Method of melting oxidic slags and combustion residues The process for melting oxidic slags and combustion residues having a minimum content of metallized portions such as, e.g., iron and/or carbon carriers, of 3% by weight is carried out in a shaft furnace directly heated by means of fossil fuels via burners... | 06/12/2001 |
| 6241797 | Process for reducing oxidic slags There is disclosed a process for reducing oxidic slags or combustion residues above a metal bath. The metal bath is formed of an iron alloy containing metals nobler than iron and whose redox potential is adjusted such FeO is reduced to Fe not at all or on... | 06/05/2001 |
| 6139621 | Process for producing sulfate cement or sulfate cement aggregates Sulfate cement or sulfate cement aggregates are produced herein by a process in which hydraulically active synthetic slags having slag basicities CaO/SiO2 of between 1.35 and 1.6, Al2 O3 contents of 10% by weight to 20% by... | 10/31/2000 |
| 6106587 | Process for separating tin as well as, if required, copper from scrap melts, in particular, tinplate melts or metallic melts In a process for separating tin as well as, if required, copper from scrap melts, in particular, tinplate melts or metallic melts as formed in the working up of waste or metal-oxide-containing combustion residues, the carbon content of the melt is adjuste... | 08/22/2000 |
| 6068677 | Method for processing waste or waste fractions, in particular car shredder light fractions The method for processing waste or waste fractions, such as, for example, household refuse, car shredder light fractions or the like, provides for pyrolysis, gasification and/or combustion, whereupon the residues are melted under reducing conditions. The ... | 05/30/2000 |
| 6059854 | Process for processing waste incineration residues A method for processing solid waste incineration residues is disclosed in which the residues are introduced a steelworks slag bath in a sufficient amount so that the residues constitute from 15-45% by weight of the combined weight of the solid waste incin... | 05/09/2000 |
| 6039787 | Process for reclaiming combustion residues In a process for working up combustion residues and slags from waste incineration plants or steel works slags, the slag is charged at a slag layer height of above 1.2 m into a converter (1), in which the molten slag is reacted with a metal bath (4) throug... | 03/21/2000 |
| 6036768 | Cement composition The cement composition of this invention includes 10 to 35% by weight of portland cement, 65 to 90% by weight of a synthetic pozzolan, and an activator for reducing the positive surface potential of the synthetic pozzolan. The synthetic pozzolan is obtain... | 03/14/2000 |
| 6010553 | Process for producing pig iron, nonferrous heavy metal alloys, FECR and synthetic blast furnace slags using metal-oxide-containing waste incineration residues or slags In a process for producing pig iron, nonferrous heavy metal alloys, ferrochromium carbure or carbon-free ferrochromium and synthetic blast furnace slags, using metal-oxide-containing waste incineration residues or slags, the charging materials of waste bu... | 01/04/2000 |
| 5993510 | Process for working up combustion residues A process is disclosed for working up combustion residues or slags from waste incineration plants or steel works slags in a converter by reacting the molten slag with a metal bath while injecting carbon and oxygen into the metal bath. The converter is sub... | 11/30/1999 |
| 5944870 | Method of manufacturing pig iron or steel and cement clinker from slags To produce pig iron or steel and cement clinker from slags it has been proposed to react iron-oxide containing liquid slags, such as, e.g., steelworks slag, with iron oxide carriers, such as, e.g., ores, cinders or the like and lime to a ferrite-containin... | 08/31/1999 |
| 5925165 | Process and apparatus for the 3-stage treatment of solid residues from refuse incineration plants In a method for processing solid residues from refuse incineration plants the slag is melted and heavy metals from the melt (16) are separated for reutilization. The slag is directly transferred from the refuse incineration plant into a first heating cham... | 07/20/1999 |
| 5882375 | Process for the production of hydraulic binders and/or alloys, such as for examples, ferrochromium or ferrovanadium In a process for the production of hydraulic binders, crude steel and/or alloys, such as, e.g., FeCr or FeV, from basic steel slags containing chromium and/or vanadium, the liquid steel slag is mixed with an additive selected from the group consisting of ... | 03/16/1999 |
| 5776226 | Method for working up refuse or metal-oxide-containing refuse incineration residues A method for working up refuse or metal-oxide-containing refuse incineration residues or metallurgical residues includes an at least partial oxidation in a meltdown oxidizing reactor followed by a two-stage reduction. The first reduction stage is effected... | 07/07/1998 |
| 5765489 | Process for the treatment of solid residue from refuse incineration plants, and apparatus for performing the process A process for the treatment of solid residue from a refuse incineration plant, involving: melting the solid residue in a first heating chamber under oxidizing conditions to provide a melt; reducing any heavy metal compounds present in the melt to elemental met... | 06/16/1998 |
| 5667147 | Process and device for granulating and crushing molten materials and grinding stocks A molten melt of slag and grinding material is introduced into a mixing chamber to which a cooling and mixing agent is injected, the agent being compressed air, water or an air/water mixture which serves to cool the melt and form vapor and solidified part... | 09/16/1997 |
| 5630369 | Reactor and a method of smelting combustion residues in the reactor The reactor (1) that is used to melt combustion residues incorporates a vertical partition wall (4) that incorporates return flow openings (7) and an overflow (6), wherein foamed slag is produced in the chamber (3) by the injection of gases through base n... | 05/20/1997 |
| 5516357 | Process for producing cement from metallurgical slag In a process for the preparation of cement from metallurgical slags, in which liquid slags from reduction processes and steelworks processes, e.g. blast furnace and converter slag, are mixed together and mixed with lime the procedure is such that in a fir... | 05/14/1996 |
| 5501721 | Process for producing pig iron and cement clinker In a process for the preparation of pig iron and cement clinker in a fusion gasifier (3) in which the charge is at least partly preheated and possibly deacidified and subjected to preliminary reduction or is used in the form of scrap, coal is blown into a... | 03/26/1996 |
