| Patents for C22B 1 - Preliminary treatment of ores or scrap (10,434) |
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| 01/15/1991 | US4985216 Reduction roasting of metal ores |
| 01/09/1991 | CN1011143B Metallurgical composites and processes |
| 01/08/1991 | WO1991000930A1 Sintering process |
| 01/08/1991 | CA2035901A1 Sintering process |
| 01/02/1991 | EP0405257A1 Process for the production of a sintering device |
| 12/27/1990 | EP0404051A1 Method for manufacturing cold bonded pellets |
| 12/26/1990 | CN1048065A Prodn. of unti-looseness agent for iron-smelting by making use of boron mud |
| 12/25/1990 | US4979986 Enhanced gold cyanide extraction |
| 12/24/1990 | CA2019213A1 Sintering device and process for the manufacture thereof |
| 12/13/1990 | WO1990015162A1 Pre-heating and pre-reduction of metal oxide ore using high temperature off-gases |
| 12/13/1990 | CA2047188A1 Pre-heating and pre-reduction of metal oxide ore using high temperature off-gases |
| 12/12/1990 | CN1047701A Pre-heating and pre-reduction of metal oxide ore using high temperature off-gases |
| 12/11/1990 | US4976781 Mineral recovery process |
| 12/05/1990 | EP0400925A2 Process and apparatus for melting contaminated metalliferous scrap material |
| 12/04/1990 | US4975226 Process for making green briquettes for forming Si or SiC |
| 12/04/1990 | US4975182 Waterflow differential electrical charging process for ores |
| 11/29/1990 | WO1990014318A1 Method and installation for roasting (a) mineral material(s) |
| 11/28/1990 | EP0399585A1 Process for the manufature of solid aggregates from compact mineral slurries |
| 11/17/1990 | CA2016640A1 Process for recovery of gold from refractory ores |
| 11/15/1990 | DE3915740A1 High temp. processing unit for e.g. annealing or melting - has reactor with oven chamber having tangentially arranged feed openings in sidewalls and controllable bucket wheel discharge |
| 11/04/1990 | WO1990013679A1 A novel process for the treatment of zinc sulphide containing ores and/or concentrates |
| 11/04/1990 | CA2055427A1 Process for the treatment of zinc sulphide containing ores and/or concentrates |
| 10/23/1990 | US4964577 Cutting, screening, separation, vibration |
| 10/16/1990 | US4963185 Olivine and iron oxide pellets from oxidative bonding |
| 10/16/1990 | US4963182 Continuous feed shaft retort process for recovery of non-ferrous metals from process dust |
| 10/16/1990 | US4962858 Cleaning sluice boxes |
| 10/03/1990 | CN2063126U Apparatus for desorption of charcoat containing gold |
| 09/26/1990 | CN1009757B Apparatus and method for feeding sintering raw mix |
| 09/26/1990 | CN1009738B Process and apparatus for preparing binderfree hot briquettes for smelting purpose |
| 09/26/1990 | CN1009737B Process of drying sulfide ore by direct contact with hot drying gases |
| 09/19/1990 | EP0387479A1 Continuous feed shaft retort process and apparatus for recovery on non-ferrous metals |
| 09/04/1990 | US4954166 Production of sponge metal from sponge metal fines |
| 08/29/1990 | CN1044957A Surface-boring sintering method and boring device |
| 08/23/1990 | WO1990009248A1 Process for expelling gas from waste materials |
| 08/23/1990 | DE3918156C1 Recovery of copper when bus=bar is scrapped - by placing jaw round copper conductor to strip, using hydraulic system |
| 08/23/1990 | DE3905025A1 Process for producing high-grade bauxite sinter having grain fractions up to 6 mm and above with simultaneous utilisation of the thermal energy of waste oils, even waste oils which can only be destroyed without hazard by high temperatures - up to 2000@C; wherein if only hazard-free destruction of such waste oil is to be operated, the bauxites are able to be replaced by material having high melting points, for example tungsten, as substitutes |
| 08/22/1990 | EP0383229A1 Preparation of iron-containing sludge for further processing |
| 08/22/1990 | EP0383228A1 Method of degassing wastes |
| 08/22/1990 | EP0383227A1 Process for binding particulate waste such as dusts, metal waste, fibres, paper waste or the like |
| 08/22/1990 | EP0383079A2 Method for manufacturing agglomerates of sintered pellets |
| 08/22/1990 | CN1044828A Method for manufacturing agglomerates of sintered pellets |
| 08/16/1990 | WO1990009246A1 Air concentrator |
| 08/16/1990 | DE3904244A1 Process for binding chemical waste in dust form, such as filter dusts or the like, to form solids |
| 08/14/1990 | WO1990009424A1 Process for binding particulate waste, such as dust, metal scrap, fibres, paper waste or the like, to solids |
| 08/14/1990 | US4948477 For the production of oxygen using hydrogen reducible lunar minerals, ilmenite and agglutinates |
| 08/14/1990 | US4948430 Ore pellets containing carboxymethylhydroxyethylcellulose and sodium carbonate |
| 08/14/1990 | CA2045407A1 Process for binding particulate waste, such as dust, metal scrap, fibres, paper waste or the like, to solids |
| 08/07/1990 | US4946658 Addition of pyritic materials to feed mix for desulfurization of phosphogypsum |
| 07/25/1990 | EP0378877A1 Process for reducing the SOx-emissions in the waste gas of sinter plants |
| 07/18/1990 | CN1008794B Concentration and nodulizing technology of sintered pyrite slag |
| 07/11/1990 | CN1043752A Process for extracting scandium from ore |
| 07/10/1990 | US4940487 Process for utilizing of zinc-containing metallurgical dusts and sludges |
| 07/10/1990 | US4940187 Systematic equipments for recycling raw materials from waste wires |
| 07/04/1990 | EP0376713A2 Process and compositions for pelletising particulate materials |
| 07/03/1990 | CA1271030A1 Method and apparatus for drying metal chips |
| 06/28/1990 | DE3905198C1 Process for forming an alloy compact, and alloy compact |
| 06/27/1990 | EP0252912B1 Immobilised extractants |
| 06/20/1990 | EP0373673A2 Apparatus and process for removing volatile coatings from scrap metal |
| 06/19/1990 | US4934665 Apparatus for preparing binderfree hot briquettes for smelting purposes |
| 06/05/1990 | US4931190 Flocculating agent combinations for mineral slime filtration systems |
| 06/05/1990 | EP0305502A4 Process for the production of group ivb transition metal-alkali metal-fluoride salts and purification thereof. |
| 05/27/1990 | CA2003200A1 Flocculating agent combinations for mineral slime filtration systems |
| 05/22/1990 | CA1269355A1 System for recovery of salvageable ferrous and non- ferrous metal components from incinerated waste materials |
| 05/16/1990 | CN1042188A Double-structure temp.-controlled sintering method |
| 05/09/1990 | CN1041888A Waterflow differential electrical charging process for ores |
| 05/08/1990 | US4923507 Process for opening ores |
| 05/08/1990 | US4923177 Continuous preheat scrap charging system and method |
| 05/08/1990 | CA1268634A1 Recovery of base metal values from base metal- and iron-bearing sulfide materials |
| 05/03/1990 | WO1990004656A1 Refining of ilmenite by removal of excess chromite |
| 05/02/1990 | EP0366114A1 Agglomerating process of sinter mix and apparatus therefor |
| 05/02/1990 | EP0365680A1 A method for producing a reduced chromium-ore bearing powder. |
| 04/25/1990 | CN1041539A Apparatus for pelletizing material |
| 04/24/1990 | US4919715 With pure oxygen using a two stage fluidized bed |
| 04/24/1990 | US4919711 Consisting of water soluble alkali metal salts of cmc and carboxymethyl hydroxyethyl cellulose, sodium tripolyphosphate; agglomerating, drying, and firing |
| 04/24/1990 | CA2001371A1 Separation of chromite from metalliferous ores |
| 04/19/1990 | WO1990003846A1 Waterflow differential electrical charging process for ores |
| 04/17/1990 | US4917723 Method for agglomeration of iron bearing materials |
| 04/17/1990 | CA1267783A1 Dross cooling |
| 03/22/1990 | DE3831838A1 Process for the utilisation of steel works filter dust and similar material |
| 03/21/1990 | EP0359230A1 Apparatus for pelletizing material |
| 03/14/1990 | EP0199818B1 Agglomerate and a process for producing the same |
| 03/13/1990 | US4908167 Heating mixture of first component and binder, pyrolyzing and degassing, where binder contains partially liquefied bituminous material, pressing, coking |
| 03/06/1990 | US4906290 Microwave irradiation of composites |
| 02/21/1990 | CN1039847A Technology and equipment of fluidization roasting before mineral-smelting |
| 02/14/1990 | EP0354613A1 Process for cleaning exhaust gases from a sintering installation |
| 02/08/1990 | WO1990001073A1 Sintered high titanium agglomerates |
| 02/08/1990 | WO1990001072A1 Titanium agglomerates |
| 02/07/1990 | EP0353541A2 A method of recycling steel belted tires |
| 02/07/1990 | CN1006721B Cold-concreted pellets used directly for steel-and-iron-smelting |
| 02/06/1990 | US4898611 Heap leaching |
| 01/31/1990 | CN1006642B Iion-smelting process of comprehensive using leach slag with v, cr |
| 01/25/1990 | WO1990000628A1 Pellets from highly enriched iron ore and a method for manufacturing the same |
| 01/10/1990 | EP0349931A2 Process for the separation and recovery of materials from scrap cables |
| 01/09/1990 | US4892715 Pretreatment of uranium ore by oxidation, leaching with acidic solution |
| 12/26/1989 | US4889694 Recovery of zinc values from zinc and iron-bearing sulfide materials |
| 12/26/1989 | US4889556 Method of recycling steel belted tires |
| 12/26/1989 | US4889555 Heating in inert atmosphere, pressing, cooling, recycling fines |
| 12/14/1989 | DE3916676A1 Method and installation for processing scrap |
| 12/07/1989 | DE3818075A1 Process for preventing emissions from hot zinc ashes |
| 12/05/1989 | CA1263641A1 Immobilised extractants |