| Patents for C22B 1 - Preliminary treatment of ores or scrap (10,434) |
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| 12/19/1991 | DE4019232A1 Removing oil from finely divided metal esp. from metal machining - by multistage washing with detergent soln. and rinsing in filter centrifuge |
| 12/19/1991 | DE4019200A1 Removing oil from metal residue esp. from metal machining - by washing with detergent soln. in mill contg. grinding elements and polymer surfactant |
| 12/19/1991 | DE4019155A1 Removing oil from metal residue esp. from metal machining - by washing with detergent soln. and rinsing in mill contg. grinding elements |
| 12/17/1991 | US5073107 Rotary drum furnace having burners which heat quartz sand bed |
| 12/03/1991 | CA1292621C Process and apparatus for preparing binderfree hot briquettes for smelting purposes |
| 11/27/1991 | EP0457790A1 Process for binding particulate waste, such as dust, metal scrap, fibres, paper waste or the like, to solids |
| 11/27/1991 | CN1056532A Cold-consolidation and agglomeration technology for loose powder material |
| 11/26/1991 | US5067659 Method of treating refuse scrap |
| 11/20/1991 | CN1014802B Recovery of copper, gold and silver by vulcanizing roasting at law temp.-ore dressing |
| 11/19/1991 | US5066327 Method for manufacturing cold bonded pellets |
| 11/19/1991 | US5066322 Metallic coolant for a metallurgical bath |
| 11/06/1991 | CN1055955A Recovery and utilization method of electric furnace powder dust |
| 10/31/1991 | WO1991016464A1 Treatment of particulate materials with reticulated cellulose |
| 10/30/1991 | CN1055768A Fluidized-bed roasting treatment method for aluminium electrolytic flue ash |
| 10/30/1991 | CN1055765A Pelletizing additive for sintered compound |
| 10/30/1991 | CN1055764A Aurosulfo ore waste slag sintering treatment method and sinter thereof |
| 10/30/1991 | CN1014530B Wet processed concentrate ore used iron smelting process in blast-furnace |
| 10/27/1991 | WO1991016463A1 Pelletisation process |
| 10/27/1991 | CA2075905A1 Pelletisation process |
| 10/23/1991 | EP0453151A1 Process for recovering valuable metals from a dust containing zinc |
| 10/22/1991 | US5059116 Apparatus and process for removing volatile coatings from scrap metal |
| 10/16/1991 | EP0451323A2 Method for preheating scrap iron by pyrolysis of resinous residues contained therein, with total recovery of their energy content and improvement of the steelmaking cycle |
| 10/10/1991 | CA2023414A1 Method of and apparatus for preheating and removing organic materials from scrap iron |
| 09/25/1991 | EP0240507B1 Chlorination of ores containing alkali or alkaline earth values |
| 09/24/1991 | US5051315 Compacting scrap metal in a tube for recycling |
| 09/24/1991 | US5051165 Quality of heavy mineral concentrates |
| 09/18/1991 | EP0446779A2 Process and installation for treating oil-containing mill scale and similar materials |
| 09/17/1991 | US5049363 Recovery of scandium, yttrium and lanthanides from titanium ore |
| 09/10/1991 | WO1991014006A1 Agglomeration process utilizing emulsion |
| 09/10/1991 | CA2075620A1 Agglomeration process utilizing emulsion |
| 09/04/1991 | CN1013805B Process of thermally threating lump or agglomerated materials on a moving grate |
| 09/03/1991 | CA1288247C Iron ore pelletisation |
| 08/14/1991 | EP0441739A1 Method of recycling coated metal waste material by shredding |
| 08/14/1991 | EP0441052A1 Method for recovering zinc from zinc-containing waste materials |
| 08/13/1991 | US5039336 Fluidized bed chlorination |
| 08/09/1991 | CA2035151A1 Process for the preparation by crushing of scrap comprising metal parts provided with a surface coating |
| 07/30/1991 | US5036170 Method for cleaning ferromagnetic chip from a lubricant-coolant and an apparatus for carrying out the method |
| 07/30/1991 | US5035742 Reduced chromium-ore bearing powder and method for producing the same |
| 07/30/1991 | US5035365 Thortveitite ore beneficiation process |
| 07/17/1991 | EP0437407A1 Method for sintering fine iron ore using dual ignition system |
| 07/17/1991 | CN1013206B Double-structure temp.-controlled sintering method |
| 07/11/1991 | DE3940328C1 Lime bonded coke mouldings mfr. for iron and steel prodn. - by mixing coke fines with mineral mortar and briquetting |
| 07/03/1991 | EP0435849A1 Process for upgrading scrap vehicles |
| 07/03/1991 | EP0435479A1 Metal recovery |
| 07/02/1991 | US5028034 Veritical shaft retort with tapered cross-section; pyrometallurgy; pelletization |
| 06/26/1991 | EP0434053A1 Process for treatment of nickel magnesium silicate ores |
| 06/26/1991 | EP0433423A1 Sintering process |
| 06/25/1991 | US5026240 Charging device |
| 06/23/1991 | CA2032554A1 Method for recovering zinc from zinc-containing waste materials |
| 06/21/1991 | CA2032279A1 Process for treatment of nickel magnesium silicate ores |
| 06/20/1991 | DE3940327C1 Cement-bonded coke mouldings - prepd. by mixing fine coke with mineral mortar and moulding moist mixt. in shaping machine |
| 06/11/1991 | US5023059 Recovery of metal values and hydrofluoric acid from tantalum and columbium waste sludge |
| 06/06/1991 | DE3939663A1 Oil contaminated metal turning drying-cleaning - using centrifuge and drier and pre-wetting turnings with heated oil |
| 06/04/1991 | CA2004475A1 Metal recovery |
| 05/30/1991 | WO1991007512A1 Acid digestion of caustic calcined magnesite |
| 05/29/1991 | EP0429031A2 Device for separating, in particular, oil contaminated waste comprising steel or sheet metal and paper |
| 05/29/1991 | CN1051759A Production of pellet with revert as core |
| 05/28/1991 | CA1284471C Separation process |
| 05/21/1991 | US5017219 Utilization of sponge metal fines |
| 05/16/1991 | DE3939018C1 Method of making furnace briquettes - has raw sand and carbon carrying material mixes before heating |
| 05/15/1991 | EP0427602A1 Binding agent and binding agent composition for agglomerating powdery materials, agglomerates thus obtained and process for their preparation |
| 05/15/1991 | EP0426731A1 Sintered high titanium agglomerates. |
| 05/08/1991 | CN1051263A System for reclaiming material from waste electric wire |
| 04/25/1991 | DE3942827C1 Prepn. of prods. from iron- and oil-contg. powders of steel industry - involves mixing powders, etc. with water and hydraulic cement |
| 04/23/1991 | US5009707 Method for manufacturing agglomerates of sintered pellets |
| 04/23/1991 | CA1283296C Mixed binder systems for agglomerates |
| 04/17/1991 | EP0423061A1 Ore dewatering process and compositions therefor |
| 04/17/1991 | EP0422309A1 Shaftfurnace for the reduction of iron ore with hydrogen to metallized iron powder for sintering |
| 04/17/1991 | CN1012355B Processing method for mineral materials containing copper oxide |
| 04/16/1991 | CA1282956C Process and apparatus for removal of deposits and linings from horizontal cylinders |
| 04/14/1991 | CA2027625A1 Ore dewatering process and compositions therefor |
| 04/10/1991 | EP0421979A1 Process for diminishing the sulfur emission in sintering processes |
| 04/10/1991 | EP0421978A1 Process for the thermal pretreatment of scrap |
| 04/04/1991 | WO1991004347A1 Compacting scrap metal in a tube for recycling |
| 04/04/1991 | WO1991004346A1 Recycling scrap metal |
| 04/04/1991 | CA2066584A1 Compacting scrap metal in a tube for recycling |
| 04/04/1991 | CA2066564A1 Recycling scrap metal |
| 04/03/1991 | CN1050410A Dry process for cold briquetting of metallurgical dust |
| 03/26/1991 | US5002607 Process for pelletizing particulate materials |
| 03/26/1991 | CA1281907C Metallurgical composites and processes |
| 03/21/1991 | WO1991003577A1 Dry cold process for making foundry dusts into briquettes |
| 03/19/1991 | US5000783 Modified native starch base binder for pelletizing mineral material |
| 03/12/1991 | CA2024885A1 Method and apparatus to enrich furnace gases with sulfur oxide |
| 03/06/1991 | EP0415146A1 Method for manufacturing agglomerates of sintered pellets |
| 03/01/1991 | CA2065314A1 Dry cold process for making foundry dusts into briquettes |
| 02/27/1991 | EP0229828B1 Process for removing volatiles from the surface of aluminium |
| 02/26/1991 | US4995912 Scrubbing agent/detergent formulation, reuse |
| 02/20/1991 | EP0413603A1 Agglomeration of particulate materials |
| 02/20/1991 | EP0413592A1 Agglomeration of particulate materials |
| 02/20/1991 | EP0413231A2 Process for the production of an inorganic sintered body |
| 02/14/1991 | DE3926195A1 Sintering together foundry sand waste material and limestone - comprises mixing and sintering at 1400-1500 deg. C |
| 02/13/1991 | CN1049188A Recovery of scandium, yttrium and lanthanides from titanium ore |
| 02/13/1991 | CN1011581B Production of elements and compounds by deserpentinization of ultramatic rock |
| 02/12/1991 | US4991824 Apparatus for beneficiating ores |
| 02/05/1991 | US4990264 Using alkoxylated C6-C11 alcohol or alkanoic acid |
| 02/04/1991 | CA2022600A1 Recovery of scandium, yttrium and lanthanides from titanium ore |
| 01/29/1991 | US4988391 Process, plant and/or apparatus for treating oil-contaminated debris or like materials |
| 01/23/1991 | EP0409015A2 Method for the production of raw material moulded bodies and raw material moulded bodies so produced |
| 01/23/1991 | CN1011339B Charging material preheater for preheating charging material of metallurgical smelting unit |
| 01/23/1991 | CN1011294B Process for dressing copper oxide ore |