| Patents for C21B 15 - Other processes for the manufacture of iron from iron compounds (585) |
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| 11/06/1986 | WO1986006361A1 Preparing metal compounds, alloys and metals by pyrolysis |
| 09/16/1986 | USRE32247 Process for the direct production of steel |
| 03/18/1986 | US4576635 Treating acicular metal oxyhydroxide with silicon compound, dehydrating, and reducing |
| 02/11/1986 | US4569691 Method of making ferroboron and ferroborosilicon alloys and the alloys made by this method |
| 12/11/1985 | EP0164174A1 Method of processing an iron-containing dust obtained in the preparation of iron or steel |
| 10/08/1985 | CA1194702A1 Process for recovering iron and zinc from steel- making dusts |
| 09/11/1985 | EP0154285A2 Process for producing ferromagnetic metal powder |
| 03/27/1985 | EP0135078A2 Rotary drum furnace and its use |
| 02/05/1985 | US4497655 Process for production of high-purity metallic iron |
| 11/06/1984 | CA1177250A1 Process for production of high-purity metallic iron |
| 06/12/1984 | US4454013 Method of separating iron and its alloy metals from fine-grained crude oxidic products |
| 05/08/1984 | US4447403 Method for autoclave oxidation of ion species aqueous solutions |
| 04/24/1984 | CA1165978A1 Process for production of high-purity iron oxide |
| 04/10/1984 | US4441923 Integrated process using non-stoichiometric sulfides or oxides of potassium for making less active metals and hydrocarbons |
| 02/28/1984 | US4434002 Process for production of high-purity metallic iron |
| 02/14/1984 | CA1162052A1 Highly orientable iron particles |
| 02/14/1984 | CA1162051A1 Reduction of iron oxide to conserve hydrogen |
| 11/08/1983 | US4414021 From an iron salt and formic or sulfuric acid, reduction with hydrogen |
| 10/04/1983 | CA1154572A1 Method and apparatus for enriching the iron carbonyl content of a recycle gas stream |
| 09/27/1983 | US4406695 Process for producing alloy steel product or iron powder by furnacing ground iron or molten iron on a molten lead bath |
| 08/02/1983 | US4396423 Carbiding iron |
| 03/08/1983 | CA1142325A1 Process for the removal of metals from carbon black |
| 12/28/1982 | US4366129 Process for producing alumina and ferric oxide from aluminium carriers with high iron and silicon content |
| 12/14/1982 | US4363652 Process for the production of high purity iron powder |
| 09/28/1982 | CA1132350A1 Reductants for reducing metals in acid media |
| 08/31/1982 | US4347291 Magnetic recording medium and preparation thereof |
| 08/17/1982 | CA1129654A1 Production of high purity iron powder |
| 06/15/1982 | CA1125520A1 Process for precipitating iron as jarosite with a low non-ferrous metal content |
| 03/16/1982 | US4320108 Process for the removal of metals from carbon black |
| 03/10/1982 | EP0046974A2 Process for the production of high-purity metallic iron |
| 03/10/1982 | EP0046973A1 Process for the production of high-purity iron oxide |
| 03/02/1982 | US4317804 Process for the selective removal of ferric ion from an aqueous solution containing ferric and other metal ions |
| 02/23/1982 | US4316738 Economical process for producing metal particles for magnetic recording |
| 01/12/1982 | US4310490 Apparatus for enriching the iron carbonyl content of a recycle gas stream |
| 01/12/1982 | US4310349 Sodium tripolyphosphate matrix |
| 12/15/1981 | US4305914 Dilution |
| 12/08/1981 | US4304595 Method of manufacturing crude iron from sulphidic iron-containing material |
| 12/01/1981 | CA1113225A1 Recovery of chlorine values |
| 11/24/1981 | CA1112880A1 Hydrometallurgical process for the treatment of oxides and ferrites which contain iron and other metals |
| 11/17/1981 | CA1112456A1 Method of manufacturing crude iron from sulphidic iron-containing material |
| 07/08/1981 | EP0031408A2 Method for separating metal from soot |
| 06/30/1981 | CA1103932A1 Manufacture of steel products from solid materials |
| 06/10/1981 | EP0030067A1 Process for the extraction of metal ions |
| 04/14/1981 | US4262037 Method of producing ferromagnetic metal powder |
| 04/07/1981 | US4260414 Process for recovering and utilizing useful substances from molten metal produced during reduction treatment of steel slag |
| 02/10/1981 | US4250157 Method and apparatus for enriching the iron carbonyl content of a recycle gas stream |
| 02/10/1981 | CA1095264A1 Thermo-activation process |
| 01/27/1981 | CA1094326A1 Process for the precipitation of iron as jarosite |
| 01/20/1981 | US4246025 Beneficiation process for oxidized iron ore |
| 01/13/1981 | US4244929 Recovery of chlorine values |
| 08/26/1980 | US4219354 Hydrometallurgical process for the treatment of oxides and ferrites which contain iron and other metals |
| 08/12/1980 | US4217152 Process for production of ferromagnetic powder |
| 07/01/1980 | CA1080486A1 Rehabilitation of zinc electrolytic metallurgy residues by recovery of contained metals |
| 05/06/1980 | US4201748 Process for thermal-activation of chalcopyrite-pyrite concentrates |
| 03/18/1980 | US4193970 Process for the precipitation of iron as jarosite |
| 03/11/1980 | US4192852 Process for precipitating iron as jarosite with a low non-ferrous metal content |
| 12/11/1979 | US4178176 From ilmenite by reductive roasting, leaching and oxidation |
| 12/11/1979 | US4178171 Manufacture of acicular ferromagnetic iron particles |
| 11/27/1979 | US4175952 Recovery of iron and titanium metal values |
| 11/20/1979 | US4174963 Recovery of titanium metal values |
| 11/20/1979 | CA1066483A1 Process for production of finely divided magnetite particles |
| 11/06/1979 | CA1065794A1 Method of reducing ores |
| 08/07/1979 | CA1059770A1 Hydrometallurgical treatment process for extracting constituent metal values from ferro-nickel |
| 07/03/1979 | CA1057537A1 Method of making iron powder |
| 05/22/1979 | US4155748 Manufacture of ferromagnetic metal particles consisting essentially of iron |
| 05/15/1979 | US4154608 Leaching, reduction with hydrogen |
| 03/13/1979 | CA1050278A1 Leaching limonitic ores |
| 02/08/1979 | WO1979000058A1 A method of manufacturing crude iron from sulphidic ironcontaining material |
| 02/08/1979 | WO1979000055A1 A method for the manufacture of an additive material for the production of crude iron |
| 12/19/1978 | US4130627 Process for recovering mineral values from fly ash |
| 12/05/1978 | CA1043593A1 Process for production of ferromagnetic powder |
| 05/16/1978 | US4089681 Iron ore reduction, working |
| 05/16/1978 | US4089675 Combination beneficiation ilmenite digestion liquor reduction process |
| 01/24/1978 | US4070437 Process for the recovery of metal chlorides from jarosite sludges resulting from the sulphuric acid processing of ores |
| 12/13/1977 | US4062924 Reductive leaching of limonitic ores with hydrogen sulfide |
| 12/06/1977 | US4061726 Manufacture of acicular γ-iron(III) oxide |
| 11/01/1977 | US4056386 Gaseous hydrogen, nitrogen monoxide, phosphine, phosphorus trifluoride, ammonia or iodine catalyst |
| 10/18/1977 | US4054638 Process for treating residues from the electrolytic processing of zinc, by recovery of the metals therein |
| 10/11/1977 | US4053301 Process for the direct production of steel |
| 09/13/1977 | US4047934 Heating, molten salt bath |
| 04/05/1977 | US4016054 Hydrometallurgical treatment process for extracting constituent metal values from ferro-nickel |
| 01/11/1977 | US4002466 Method of reducing ores |
| 11/02/1976 | US3989510 Manufacture of titanium chloride and metallic iron from titaniferous materials containing iron oxides |
| 08/24/1976 | US3976743 Treatment of zinc plant residue |
| 08/17/1976 | US3975186 Method of making iron powder |