Version: 2025.01
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CPC | COOPERATIVE PATENT CLASSIFICATION | |||
| C21C | PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS (refining metals in general C22B 9/00) [2020-05] WARNING
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C21C 1/00 | Refining of pig-iron; Cast iron [2013-01] |
C21C 1/02 | . | Dephosphorising or desulfurising [2013-01] |
C21C 1/025 | . . | {Agents used for dephosphorising or desulfurising} [2013-01] |
C21C 1/04 | . | Removing impurities other than carbon, phosphorus or sulfur [2013-01] |
C21C 1/06 | . | Constructional features of mixers for pig-iron [2013-01] |
C21C 1/08 | . | Manufacture of cast-iron [2013-01] |
C21C 1/10 | . | Making spheroidal graphite cast-iron [2013-01] |
C21C 1/105 | . . | {Nodularising additive agents} [2013-01] |
C21C 3/00 | Manufacture of wrought-iron or wrought-steel [2013-01] |
C21C 5/00 | Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel {or stainless steel} [2013-01] |
C21C 5/005 | . | {Manufacture of stainless steel} [2013-01] |
C21C 5/02 | . |
C21C 5/04 | . | Manufacture of hearth-furnace steel, e.g. Siemens-Martin steel {(C21C 5/005 takes precedence)} [2013-01] |
C21C 5/06 | . . | Processes yielding slags of special composition [2013-01] |
C21C 5/28 | . |
C21C 5/285 | . . | {Plants therefor} [2013-01] |
C21C 5/30 | . . | Regulating or controlling the blowing [2013-01] |
C21C 5/305 | . . . | {Afterburning} [2013-01] |
C21C 5/32 | . . . |
C21C 5/34 | . . . |
C21C 5/35 | . . . | Blowing from above and through the bath [2013-01] |
C21C 5/36 | . . | Processes yielding slags of special composition [2013-01] |
C21C 2005/363 | . . . | {Slag cements} [2013-01] |
C21C 2005/366 | . . . | {Foam slags} [2013-01] |
C21C 5/38 | . . | Removal of waste gases or dust [2013-01] |
C21C 5/42 | . . | Constructional features of converters [2013-01] |
C21C 5/44 | . . . | Refractory linings [2013-01] |
C21C 5/441 | . . . . | {Equipment used for making or repairing linings} [2013-01] |
C21C 5/443 | . . . . . | {Hot fettling; Flame gunning} [2013-01] |
C21C 5/445 | . . . . | {Lining or repairing the taphole} [2013-01] |
C21C 2005/446 | . . . . . | {Dry linings} [2013-01] |
C21C 2005/448 | . . . . | {Lining wear indicators} [2013-01] |
C21C 5/46 | . . . | Details or accessories [2013-01] |
C21C 5/4606 | . . . . | {Lances or injectors} [2013-01] |
C21C 5/4613 | . . . . . | {Refractory coated lances; Immersion lances} [2013-01] |
C21C 5/462 | . . . . . | {Means for handling, e.g. adjusting, changing, coupling} [2013-01] |
C21C 2005/4626 | . . . . . | {Means for cooling, e.g. by gases, fluids or liquids} [2013-01] |
C21C 5/4633 | . . . . | {Supporting means} [2013-01] |
C21C 5/464 | . . . . . | {Trunnion bearings} [2013-01] |
C21C 5/4646 | . . . . | {Cooling arrangements} [2013-01] |
C21C 5/4653 | . . . . | {Tapholes; Opening or plugging thereof} [2013-01] |
C21C 5/466 | . . . . | {Charging device for converters} [2013-01] |
C21C 2005/4666 | . . . . . | {for charging with organic contaminated scrap} [2013-01] |
C21C 5/4673 | . . . . | {Measuring and sampling devices} [2013-01] |
C21C 2005/468 | . . . . . | {Means for determining the weight of the converter} [2013-01] |
C21C 5/4686 | . . . . | {Vehicles for supporting and transporting a converter vessel} [2013-01] |
C21C 5/4693 | . . . . | {Skull removal; Cleaning of the converter mouth} [2013-01] |
C21C 5/48 | . . . . | Bottoms or tuyéres of converters [2013-01] |
C21C 5/50 | . . . . | Tilting mechanisms for converters [2013-01] |
C21C 5/52 | . | Manufacture of steel in electric furnaces ({C21C 5/005 takes precedence}; electric heating per se H05B) [2013-01] |
C21C 5/5205 | . . | {in a plasma heated furnace} [2013-01] |
C21C 5/5211 | . . | {in an alternating current [AC] electric arc furnace} [2013-01] |
C21C 5/5217 | . . . | {equipped with burners or devices for injecting gas, i.e. oxygen, or pulverulent materials into the furnace} [2013-01] |
C21C 2005/5223 | . . . | {with post-combustion} [2013-01] |
C21C 5/5229 | . . | {in a direct current [DC] electric arc furnace} [2013-01] |
C21C 2005/5235 | . . . | {with bottom electrodes} [2013-01] |
C21C 5/5241 | . . | {in an inductively heated furnace} [2013-01] |
C21C 5/5247 | . . . | {processing a moving metal stream while exposed to an electromagnetic field, e.g. in an electromagnetic counter current channel} [2013-01] |
C21C 5/5252 | . . | {in an electrically heated multi-chamber furnace, a combination of electric furnaces or an electric furnace arranged for associated working with a non electric furnace} [2013-01] |
C21C 2005/5258 | . . | {with crater formed by down-melting of scrap or charge through electrode or lance} [2013-01] |
C21C 5/5264 | . . | {Manufacture of alloyed steels including ferro-alloys} [2013-01] |
C21C 5/527 | . . | {Charging of the electric furnace} [2013-01] |
C21C 2005/5276 | . . . | {with liquid or solid rest, e.g. pool, "sumpf"} [2013-01] |
C21C 2005/5282 | . . . | {with organic contaminated scrap} [2013-01] |
C21C 2005/5288 | . . | {Measuring or sampling devices} [2013-01] |
C21C 5/5294 | . . | {General arrangement or layout of the electric melt shop} [2013-01] |
C21C 5/54 | . . | Processes yielding slags of special composition [2013-01] |
C21C 5/56 | . | Manufacture of steel by other methods (making liquid steel by direct processes C21B 13/00 {; C21C 5/005 takes precedence}) [2013-01] |
C21C 5/562 | . . | {starting from scrap} [2013-01] |
C21C 5/565 | . . . | {Preheating of scrap (apparatus for preheating scrap in general F27D 13/002)} [2013-01] |
C21C 5/567 | . . | {operating in a continuous way} [2013-01] |
C21C 7/00 | Treating molten ferrous alloys, e.g. steel, not covered by groups C21C 1/00 - C21C 5/00 (treating molten metals during moulding B22D 1/00, B22D 27/00; remelting ferrous metals C22B) [2016-05] |
C21C 7/0006 | . | {Adding metallic additives} [2013-01] |
C21C 2007/0012 | . . | {Lead} [2013-01] |
C21C 2007/0018 | . . | {Boron} [2013-01] |
C21C 7/0025 | . | {Adding carbon material} [2013-01] |
C21C 2007/0031 | . . | {being plastics, organic compounds, polymers} [2013-01] |
C21C 7/0037 | . | {by injecting powdered material} [2013-01] |
C21C 7/0043 | . . | {into the falling stream of molten metal} [2013-01] |
C21C 7/005 | . | {using exothermic reaction compositions} [2013-01] |
C21C 7/0056 | . | {using cored wires} [2013-01] |
C21C 2007/0062 | . . | {with introduction of alloying or treating agents under a compacted form different from a wire, e.g. briquette, pellet} [2013-01] |
C21C 7/0068 | . | {by introducing material into a current of streaming metal} [2013-01] |
C21C 7/0075 | . | {Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle} [2013-01] |
C21C 7/0081 | . | {Treating and handling under pressure} [2013-01] |
C21C 7/0087 | . | {Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal} [2013-01] |
C21C 2007/0093 | . | {Duplex process; Two stage processes} [2013-01] |
C21C 7/04 | . | Removing impurities by adding a treating agent [2013-01] |
C21C 7/06 | . . | Deoxidising, e.g. killing [2013-01] |
C21C 7/064 | . . | Dephosphorising; Desulfurising [2013-01] |
C21C 7/0645 | . . . | {Agents used for dephosphorising or desulfurising} [2013-01] |
C21C 7/068 | . . | Decarburising [2013-01] |
C21C 7/0685 | . . . | {of stainless steel} [2013-01] |
C21C 7/072 | . . |
C21C 7/076 | . . | Use of slags or fluxes as treating agents (C21C 7/06, C21C 7/064, C21C 7/068 take precedence) [2013-01] |
C21C 7/10 | . | Handling in a vacuum [2013-01] |
C21C 2100/00 | Exhaust gas [2013-01] |
C21C 2100/02 | . | Treatment of the exhaust gas [2013-01] |
C21C 2100/04 | . | Recirculation of the exhaust gas [2013-01] |
C21C 2100/06 | . | Energy from waste gas used in other processes [2013-01] |
C21C 2200/00 | Recycling of waste material [2013-01] |
C21C 2250/00 | Specific additives; Means for adding material different from burners or lances [2013-01] |
C21C 2250/02 | . | Hot oxygen [2013-01] |
C21C 2250/04 | . | Liquid gas [2013-01] |
C21C 2250/042 | . . | Liquid oxygen [2013-01] |
C21C 2250/06 | . | Hollow electrode [2013-01] |
C21C 2250/08 | . | Porous plug [2013-01] |
C21C 2300/00 | Process aspects [2013-01] |
C21C 2300/02 | . | Foam creation [2013-01] |
C21C 2300/04 | . | Avoiding foam formation [2013-01] |
C21C 2300/06 | . | Modeling of the process, e.g. for control purposes; CII [2013-01] |
C21C 2300/08 | . | Particular sequence of the process steps [2013-01] |