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| 4K013 | Treatment of steel in its molten state | |
| C21C7/00 -7/10@Z | ||
| C21C7/00-7/10@Z | AA | AA00 MATERIALS TO BE TREATED |
AA01 | AA02 | AA04 | AA06 | AA07 | AA09 | ||||
| . High alloy steels | . . High chromium steels | . Steel for electromagnetic | . Free-cutting steels | . Clean steels | . Continuous castings | |||||||
| BA | BA00 PURPOSE OF TREATMENT |
BA01 | BA02 | BA03 | BA04 | BA05 | BA07 | BA08 | BA09 | |||
| . Removal of components | . . Decarburization | . . Dephosphorization | . . . Composite phosphorization prevention | . . Desulfurization | . . Degassing | . . . Deoxygenation | . . . Dehydrogenation | |||||
| BA11 | BA12 | BA14 | BA16 | BA17 | BA18 | |||||||
| . . . Denitrification | . . . . Composite nitrification prevention | . Control of included material | . Addition of components | . . Carburization | . . Nitriding | |||||||
| CA | CA00 GAS TREATMENTS AND APPARATUSES |
CA01 | CA02 | CA03 | CA04 | CA05 | CA07 | CA08 | CA09 | |||
| . Inert gases | . . Argon gas | . Oxidizing gases | . . O2 gas | . Reducing gases | . Mixed gas treatments | . Compound gas treatments | . . Argon-oxygen decarburization (AOD) method | |||||
| CA11 | CA12 | CA13 | CA15 | CA16 | CA17 | CA18 | CA19 | |||||
| . Bottom blowing methods | . Top blowing methods | . . Two-way vertical blow | . Lances | . . Shape and construction | . . . Refractories and supports | . . Materials | . . Retainment and replacement | |||||
| CA21 | CA23 | CA25 | ||||||||||
| . Nozzles | . Porous plugs | . Waste gas treatments and recovery | ||||||||||
| CB | CB00 ADDITION OF TREATING AGENTS |
CB01 | CB02 | CB03 | CB04 | CB05 | CB06 | CB07 | CB09 | |||
| . Addition of linear treating agents | . Addition by shooting | . Addition of a powdery treatment agent | . . Addition using a carrier gas | . Addition to dephosphorizing liquid | . Addition of liquid treatment agent | . Addition into a continuous casting bath | . Flux treatments | |||||
| CC | CC00 STIRRING PROCESSES AND APPARATUSES |
CC01 | CC02 | CC04 | CC06 | CC08 | CC09 | |||||
| . By gas | . . Bottom blowing | . . Top blowing | . Stirring by electromagnetic induction | . Mechanical stirring | . . Stirring using an impeller | |||||||
| CD | CD00 HEATING PROCESSES OR EQUIPMENT |
CD01 | CD02 | CD04 | CD07 | CD08 | ||||||
| . Electrical heating | . . Arc heating | . . Induction heating | . Addition of heating-up agent | . . Fuel blowing-in | ||||||||
| CE | CE00 VACUUM/DECOMPRESSION AND APPARATUSES |
CE01 | CE02 | CE03 | CE04 | CE05 | CE06 | CE07 | CE08 | CE09 | ||
| . RH method | . DH method | . Gas treatment included | . . O2 gas | . . Inert gases | . Treatment agent addition included | . . Including flux treatments | . Control | . Equipment | ||||
| CF | CF00 TREATMENTS AND DEVICES OTHER THAN CA TO CE |
CF01 | CF02 | CF03 | CF04 | CF06 | ||||||
| . Slag treatment | . . Component recovery from slug | . . Separation of slag and molten metal | . . . Exposing molten metal surface | . Filtering molten metal | ||||||||
| CF11 | CF12 | CF13 | CF14 | CF15 | CF18 | CF19 | ||||||
| . Other devices | . . Furnaces | . . Ladles | . . Charging devices | . . Drain devices | . . Furnace wall structures | . . Fire resistant materials | ||||||
| DA | DA00 COMPOUND TREATMENTS AND SUCCESSIVE TREATMENTS |
DA01 | DA02 | DA03 | DA05 | DA06 | DA08 | DA09 | DA10 | |||
| . Compound processing | . . Simultaneous | . . Over time | . . Gas treatment included | . . . Compound gas treatment included | . . Treatment agent addition included | . . . Compound treatment agent addition included | . . . Including flux treatments | |||||
| DA12 | DA13 | DA14 | DA17 | |||||||||
| . . Vacuum/depressurizing process included | . . Stirring process included | . . Heating process included | . Successive treatments | |||||||||
| EA | EA00 TREATING AGENTS AND ADDITIVES |
EA01 | EA02 | EA03 | EA04 | EA05 | EA07 | EA08 | EA09 | |||
| . Oxides | . . Iron oxide | . . CAO (Unslaked lime) | . . SiO2 | . . Al2O3 | . Halogenides | . . Fluorides | . . . CAF2 (Fluorite) | |||||
| EA11 | EA12 | EA13 | EA15 | EA16 | EA18 | EA19 | EA20 | |||||
| . Carbonates | . . CACO3 (lime stone) | . . NA2CO3 (Soda ash) | . Carbides | . . CAC2 | . Metals | . . Al | . . Mn | |||||
| EA23 | EA24 | EA25 | EA26 | EA27 | EA28 | EA29 | EA30 | |||||
| . . Alkaline metals | . . Alkaline earth metals | . . . CA | . . Rare earth metals | . Semi-metals | . . Si | . Non-metals | . . C | |||||
| EA31 | EA32 | EA36 | EA37 | EA39 | ||||||||
| . . B | . Ferroalloy | . Shape and structure | . Liquid treatment agents | . Treatment agent manufacturing process | ||||||||
| FA | FA00 CONTROL, MEASUREMENT, AND NUMERICAL LIMITATION |
FA01 | FA02 | FA03 | FA04 | FA05 | FA06 | |||||
| . Temperature | . Chemical composition | . Atmosphere | . Pressure and the degree of vacuum | . Chemical composition of slag | . . Slag basicity | |||||||
| FA11 | FA12 | FA13 | ||||||||||
| . Computer-aided control | . Continuous control | . Control at specific times |