| Patents for C21B 3 - General features in the manufacture of pig-iron (3,260) |
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| 01/30/1992 | DE4032518C1 Spray head for granulating liq. blast furnace slag - has flat nozzle with slot matching width of slag stream and adjustable in height |
| 01/21/1992 | US5082483 Enclosures for slag pelletization apparatus and method of operation thereof |
| 01/08/1992 | EP0464967A1 Process and apparatus for treating molten and hot slag |
| 01/08/1992 | CN1057599A Comprehensive utilization technology for open-hearth furnace cinder |
| 01/04/1992 | CA2046150A1 Method and device for the preparation of hot, liquid slags |
| 11/06/1991 | CN1014602B Process of self-decomposition for vessel slag afterheat |
| 10/15/1991 | US5057189 Pyrolysis of tires; recovering char, steel, fuel gas and oil |
| 08/22/1991 | WO1991012210A1 Cotreatment of sewage and steelworks wastes |
| 07/31/1991 | EP0438838A2 Process for manufacturing a cement and a granulate from converter steel slag, and granulator device |
| 07/25/1991 | WO1991010872A1 Collecting pit for receiving molten metal |
| 07/18/1991 | DE4037525A1 Appts. to remove water from slag sand - has funnel below sand hopper with overflow edge for rising water level |
| 06/27/1991 | WO1991008836A1 A method and an apparatus for crushing slags resulting from steel production |
| 06/11/1991 | US5022635 Removeable cover for a hot metal transfer car |
| 05/28/1991 | US5019160 Adding Boron-Containing Compound, Silicate-Containing Mineral, And Aluminum Or Magnesium |
| 05/22/1991 | CN1012646B Catalysising crystallizing and growing method of columbite from kind of slag |
| 05/08/1991 | CN1012579B Comprehensive utilization of cr dregs by detoxicated melting cr dregs |
| 05/07/1991 | US5013532 Method for recycling electric arc furnace dust |
| 05/02/1991 | WO1991005879A1 Smelting of nickel laterite and other iron containing nickel oxide materials |
| 05/01/1991 | CN1012472B Plant to convert a metallic charge into semifinished products and connected smelting and casting method |
| 02/26/1991 | US4995894 Enclosures for slag pelletization apparatus and method of operation |
| 02/19/1991 | CA1280287C Apparatus and method for fragmenting slag |
| 02/14/1991 | DE3926195A1 Sintering together foundry sand waste material and limestone - comprises mixing and sintering at 1400-1500 deg. C |
| 02/10/1991 | WO1991002095A1 Arrangement for introducing waste material into a molten slag |
| 02/10/1991 | CA2037905A1 Arrangement for introducing waste material into a molten slag |
| 01/30/1991 | CN1048810A Gravity filter bed with moving band for slag and water separation |
| 01/10/1991 | DE3922095A1 Prodn. of liq. steel - from liq. iron oxide formed by treating metallic foam with high oil content etc., by mixing with pig iron |
| 01/09/1991 | CN1048374A Process and equipment for treating slag of revolving furnace |
| 12/18/1990 | US4978107 Apparatus for producing foamed blast furnace slag |
| 11/22/1990 | EP0207995B1 Installation for granulation of metallurgic melt |
| 11/20/1990 | US4971615 Method and means for producing mineral wool |
| 11/06/1990 | CA1275943C "filterbett" filter bed |
| 10/04/1990 | DE3930852C1 Disposal of filter dusts from foundry processes - by injecting into slag ladle using blowing lances |
| 09/18/1990 | US4957544 Lining durability; corrosion resistance |
| 08/15/1990 | CN1009207B Process and apparatus for manufacturing slag sand (granular solids) with blast furnace slag |
| 08/14/1990 | US4948477 For the production of oxygen using hydrogen reducible lunar minerals, ilmenite and agglutinates |
| 07/25/1990 | CN1044129A Catalysising. crystallizing and growing of columbite from a kind of slag |
| 05/15/1990 | CA1268947A1 Method and apparatus for manufacturing heat-resistant and/or fire-resistant fibre materials |
| 04/25/1990 | EP0365515A2 Device for making foundry pumice |
| 03/20/1990 | US4909837 Process and apparatus for granulating molten slag |
| 03/20/1990 | US4909821 Perforated rotary drum; blades; water tank |
| 03/07/1990 | CN1040224A Method for production of cement, potassium fertilizer, and cr contg, cast iron using detoxicated melting cr dregs |
| 02/06/1990 | US4898227 Plant to convert a metallic charge into semifinished products |
| 01/30/1990 | US4897201 Composition and a process for promoting dewatering of granulated slag |
| 01/11/1990 | DE3919155A1 Process for granulating molten slag |
| 12/07/1989 | DE3817845A1 Process for the pollution-free immobilization of dust, which contains water-soluble compounds polluting the environment, from steelworks dedusting installations |
| 11/21/1989 | US4882303 Modified steel slag and method of manufacturing the same |
| 11/08/1989 | EP0340644A1 Process for the removal and recycling of waste materials |
| 11/02/1989 | DE3841835C1 Process for the manufacture of re-usable products from metallic sludges containing large amounts of adhering oil or other impurities |
| 10/17/1989 | US4874428 Fluidizing a lime-silica slag |
| 09/20/1989 | EP0333242A1 Process and apparatus for granulating molten slag |
| 08/08/1989 | US4854946 Method for treating blast furnace gas and apparatus for carrying out that method |
| 06/13/1989 | US4839151 Recovery process |
| 05/02/1989 | US4826233 Vehicular body for hauling hot slag and other materials having a removable metal lining |
| 04/04/1989 | US4818290 Method for utilizing slag from ferroalloy production |
| 01/10/1989 | US4797154 Plant to convert a metallic charge into semifinished products, and connected smelting and casting method |
| 12/28/1988 | EP0296616A1 Process for the detoxification of steel plant wastes |
| 12/22/1988 | DE3718484A1 Feuerungsanlage Furnace |
| 12/21/1988 | CN88211276U Wind power granulating device for steel dross |
| 12/20/1988 | CA1247148A1 Method for utilizing slag from ferroalloy production |
| 10/25/1988 | US4780135 Process for the detoxification of steel plant wastes |
| 10/18/1988 | US4778523 Process for using steelmaking slag |
| 09/15/1988 | DE3724764C1 Appliance for transporting liquid metallurgical slag |
| 08/11/1988 | DE3703093A1 Organic/mineral fertilizer capable of being scattered (spread) |
| 08/09/1988 | US4762554 Process to eliminate hazardous components from the electric arc furnace flue dust and recovering of metals |
| 08/04/1988 | DE3701571A1 Digestion of raw phosphates even in a fusion gasifier, with addition of scrap and steelworks slag |
| 08/02/1988 | CA1239798A1 Process for recovering valuable metals from an iron dust containing a higher content of zinc |
| 07/27/1988 | EP0275863A1 Method and apparatus for reclaiming metal values from electric arc furnace flue dust and sludge and rendering residual solids recyclable or non-hazardous |
| 07/19/1988 | US4758268 Method and apparatus for reclaiming metal values from electric arc furnace flue dust and sludge and rendering residual solids recyclable or non-hazardous |
| 07/19/1988 | US4758260 Process and device for producing granulated slag sand from blast furnace slag |
| 06/09/1988 | DE3640472A1 Process for producing crude iron by smelting of calcined pyrite and/or metallurgical dust |
| 05/17/1988 | CA1236810A1 Slag disposal method |
| 05/11/1988 | CN87106488A Plant to convert a metallic charge into semifinished products and connected smelting and casting method |
| 04/26/1988 | US4740300 For separation of water from granulated blast furnace slag, through layers of gravel |
| 04/13/1988 | EP0263559A1 Process for working-up soda slags in the desulfurization of pig iron |
| 04/06/1988 | EP0262706A1 Plant to convert a metallic charge into semifinished products, and connected smelting and casting method |
| 03/02/1988 | EP0257903A2 Apparatus and method for fragmenting slag |
| 02/16/1988 | US4725307 Agglomerating decomposing hydrous silicate; recovering vaporized lead and zinc; solidifying, crushing, separating |
| 02/11/1988 | DE3626772A1 Process and apparatus for producing road building materials and heat recovery from metallurgical slags |
| 02/02/1988 | US4722483 Apparatus and method for fragmenting slag |
| 01/05/1988 | US4717125 Metallurgical ladle with improved tilting lug |
| 11/11/1987 | CN86103047A Process of self-decomposition for vessel slag afterheat |
| 11/04/1987 | CN86102603A Process and apparatus for manufacturing slag sand (granular solids) with blast furnace slag |
| 10/22/1987 | DE3711353A1 Process for treating metal-containing materials |
| 10/06/1987 | US4698219 Multistage carbonation of calcium oxide and calcium sulfide |
| 10/01/1987 | DE3610257A1 Method for the continuous foaming of slag melts and for the continuous granulation of slag and metal melts |
| 09/01/1987 | CA1226137A1 Air-pulverizing apparatus for high-temperature molten slag |
| 08/19/1987 | EP0232472A2 Transport vehicle |
| 08/06/1987 | DE3603879A1 Process for the preparation of disposable filter dusts |
| 07/30/1987 | DE3626104A1 Process for hazard-free cooling of molten slags |
| 07/07/1987 | US4678419 Arrangement for the production of vitrified slag |
| 07/07/1987 | US4678167 Tundish car in a continuous casting assembly |
| 06/19/1987 | DE3544287A1 Process for obtaining iron from roasted pyrites (burnt ore) and similar materials, and apparatus for performing this process |
| 06/09/1987 | US4671752 Air-pulverizing apparatus for high-temperature molten slag |
| 05/19/1987 | US4666591 Recovering iron-rich concentrates; magnetic sorting |
| 05/14/1987 | DE3637397A1 Process for disposing of residues from steel works dust precipitators |
| 05/12/1987 | CA1221534A1 Method and arrangement for recovering the sensible heat of slag |
| 04/07/1987 | US4655831 Method of stabilizing a steel making slag |
| 03/24/1987 | US4652310 Adding reforming agent, cooling, adding lime, plaster, cement |
| 03/17/1987 | US4650510 From molten slags from metal refining |
| 03/17/1987 | CA1219116A1 Process for desulfurising gases by means of molten mineral baths in the course of carbonaceous materials gasification |