| ReturnTo Theme-Group-Choice | Onelevelup |
| 4K012 | Manufacture of iron | |
| C21B3/00 -5/06;11/00-15/04 | ||
| C21B3/06 | AA | AA00 MOLTEN OR LIQUID SLAG TREATMENTS |
AA01 | AA02 | AA03 | AA04 | AA05 | |||||
| . Chemical treatments | . Granulation | . Air granulation | . Measurement | . Machinery and equipment | ||||||||
| C21B3/08 | AB | AB00 SLAG COOLING |
AB01 | AB02 | AB03 | AB04 | AB06 | AB07 | AB08 | |||
| . Water granulation | . . Water injection | . . Stirring | . . Water separation | . Air granulation | . Measurement | . Machinery and equipment | ||||||
| C21B3/10 | AC | AC00 SLAG POTS AND SLAG CARS |
AC01 | AC02 | AC03 | AC04 | AC05 | |||||
| . Slag pots | . Slag cars | . Shapes | . Construction | . . Fireproof construction | ||||||||
| C21B5/00,301 | BA | BA00 RAW MATERIALS MIXING, PREPARATION, AND CHARGING |
BA01 | BA02 | BA03 | BA04 | BA06 | BA07 | BA08 | |||
| . Raw materials | . . Sintered steel and pellets | . Auxiliary raw materials | . Reducing agents | . Preparatory treatment and manufacture | . Mixing and preparation | . Charging | ||||||
| C21B5/00,310 | BB | BB00 BLAST FURNACE CONTROL |
BB01 | BB02 | BB03 | BB05 | BB06 | BB07 | BB08 | BB09 | ||
| . Furnace heat | . Charges characteristics | . . Dropping | . Furnace bottom status | . . Molten pig components | . . . Si | . . Furnace bottom temperature | . . . Molten pig temperature | |||||
| C21B5/00,311-5/00,313 | BC | BC00 CHARGED AND DEPOSITED STATUS CONTROL |
BC01 | BC02 | BC03 | BC04 | BC05 | BC06 | BC07 | BC08 | BC09 | BC10 |
| . Charging control | . . Form of charging | . . . Coke | . . . Ores | . Deposited status control | . . Coke beds | . . Ore beds | . . Mixture beds | . . Bed thickness and bed thickness ratio | . Surface shape control | |||
| C21B5/00,316-5/00,318 | BD | BD00 DRAFT CONTROL |
BD01 | BD02 | BD03 | BD04 | BD05 | BD06 | BD07 | BD08 | BD09 | |
| . Amount of air blowing-in | . Air blowing-in | . Air blowing-in temperature | . Oxygen enriched | . Moisture | . Auxiliary raw materials blowing-in | . . Iron oxide | . . Slag-making agents | . . Powder mixtures | ||||
| C21B5/00,319-5/00,320 | BE | BE00 FUEL BLOWING-IN CONTROL |
BE01 | BE02 | BE03 | BE04 | BE05 | BE06 | BE07 | BE08 | BE09 | |
| . Solid fuels | . Liquid fuels | . Fuel mixture | . Feeding | . Blowing-in | . . Amount of blowing-in | . . Rate of blowing-in | . . Blowing-in position | . . Components | ||||
| C21B5/00,321 | BF | BF00 REDUCING GAS BLOWING-IN CONTROL |
BF01 | BF02 | BF03 | BF04 | BF05 | BF06 | BF07 | BF08 | BF09 | |
| . Components | . . Hydrocarbons | . . Carbon monoxide | . . Hydrogen | . Manufacture | . Feeding | . Blowing-in | . . Amount of blowing-in | . . Rate of blowing-in | ||||
| C21B11/00;11/10 | CA | CA00 PIG IRON MANUFACTURE NOT USING A BLAST FURNACE |
CA01 | CA02 | CA03 | CA04 | CA05 | CA06 | CA07 | CA08 | CA09 | CA10 |
| . Reducing gases | . . Circulation and reuse | . Preparatory reduction | . Fusion reduction | . . Raw materials charging | . . Gas blowing-in | . . Reduction conditions | . Furnace and ancillary equipment | . . Electric furnaces | . . Converter-type furnaces | |||
| C21B11/02 | CB | CB00 PIG IRON MANUFACTURE USING A LOW SHAFT FURNACE |
CB01 | CB02 | CB03 | CB04 | CB05 | CB06 | CB07 | CB08 | ||
| . Reducing gas reuse | . Raw materials charging | . Preparatory reduction | . Fusion reduction | . . Reducing agent blowing-in | . . . Blowing-in between raw materials | . . Reducing agent filling | . . Plasma heating | |||||
| C21B13/00 | DA | DA00 SPONGY IRON OR LIQUID STEEL MANUFACTURE |
DA01 | DA02 | DA03 | DA04 | DA05 | DA06 | DA08 | DA09 | DA10 | |
| . Reducing gases | . . Components and characteristics | . . Manufacture | . . Circulation | . Sponge iron and reduced iron | . Molten steel | . Pre-treatments | . Post-treatments | . . Briquetting | ||||
| C21B13/00,101 | DB | DB00 SPONGY IRON OR LIQUID STEEL MANUFACTURE USING A FLUID BED |
DB01 | DB02 | DB03 | DB04 | DB06 | DB07 | DB09 | DB10 | ||
| . Charging | . Discharging | . Fluid layer/beds | . . Multistage or multiple layer/beds | . Reducing gases | . . Circulation | . Solid reducing agents | . . Blowing-in | |||||
| C21B13/02 | DC | DC00 SPONGY IRON OR LIQUID STEEL MANUFACTURE USING A SHAFT FURNACE |
DC01 | DC02 | DC03 | DC04 | DC05 | DC06 | DC07 | DC08 | DC09 | DC10 |
| . Charging | . Discharging | . Fluid layer beds | . Multistage or multiple layer beds | . Reducing gases | . . Circulation | . Solid reducing agents | . . Blowing-in and charging | . Furnaces | . . Ancillary equipment | |||
| C21B13/08 | DD | DD00 SPONGY IRON OR LIQUID STEEL MANUFACTURE USING A ROTARY KILN |
DD01 | DD02 | DD03 | DD04 | DD05 | DD06 | DD07 | DD08 | DD09 | DD10 |
| . Charging | . Discharging | . Fluid layer beds | . Multistage or multiple layer beds | . Reducing gases | . Solid reducing agents | . . Blowing-in and charging | . Heating and fuels | . Furnaces | . . Ancillary equipment | |||
| C21B13/10 | DE | DE00 SPONGY IRON OR LIQUID STEEL MANUFACTURE USING A HEARTH-TYPE FURNACE |
DE01 | DE02 | DE03 | DE04 | DE06 | DE08 | DE09 | |||
| . Charging | . Discharging | . Fluid layer beds | . Multistage or multiple layer beds | . Reduction | . Furnace and ancillary equipment | . . Enclosed-vessel-type furnaces | ||||||
| C21B13/14 | DF | DF00 SPONGY IRON OR LIQUID STEEL MANUFACTURE USING A MULTI-STAGE METHOD |
DF01 | DF02 | DF03 | DF04 | DF05 | DF06 | DF07 | DF08 | DF09 | DF10 |
| . Preparatory reduction | . Fusion reduction | . . Reduction conditions | . Furnace dcombination and ancillary equipment | . . Fluid beds | . . Shaft furnaces | . . Rotary kilns | . . Electric furnaces | . Sponge iron and reduced iron | . Molten steel | |||
| C21B15/00 | EA | EA00 OTHER METHODS OF MAKING IRON |
EA01 | EA02 | EA03 | EA04 | EA05 | EA06 | EA07 | EA08 | EA09 | |
| . Waste raw materials | . Preparatory treatments | . Dry methods | . . Fusion reduction | . Wet methods | . . Electrolysis | . . Acid leaching | . . Organic solvent extraction | . Dry/wet method combinations |