| ReturnTo Theme-Group-Choice | Onelevelup |
| 4K002 | Manufacture of carbon steels or cast steels | |
| C21C5/00;5/28-5/50@Z | AA | AA00 MANUFACTURED STEELS |
AA01 | AA02 | AA03 | AA04 | AA05 | AA10 | ||||
| . Carbon steels | . Alloy steels | . . Cr steels | . . Ni-Cr steels | . . Cr-Mo steels | . Others | |||||||
| AB | AB00 RAW MATERIALS |
AB01 | AB02 | AB04 | AB06 | AB07 | AB10 | |||||
| . Principal raw materials | . . Pretreated hot irons | . Auxiliary raw materials | . Raw material processing | . Shape and structure of raw material | . Others | |||||||
| AC | AC00 BLOW SMELTING |
AC01 | AC02 | AC03 | AC04 | AC05 | AC06 | AC07 | AC08 | AC09 | AC10 | |
| . Preparation for blow smelting | . . Furnace heat maintenance | . . Raw material preheating | . . . Preheating by waste gas | . Top blowing | . Bottom blowing | . Top and bottom blowing | . Timing adjustment for addition of raw materials | . Double slag method | . Others | |||
| AD | AD00 BLOW SMELTING GAS |
AD01 | AD02 | AD03 | AD05 | AD10 | ||||||
| . Blow smelting gas regulation | . . Oxygen gas regulation | . . Protective gas regulation | . Mixed blowing into blow smelting gas | . Others | ||||||||
| AE | AE00 SLAGS |
AE01 | AE02 | AE03 | AE05 | AE06 | AE07 | AE10 | ||||
| . Slag regulation | . . Basicity | . Forming or slopping | . Effective uses of waste | . . Chemical treatments | . . Mechanical/physical treatments | . Others | ||||||
| AF | AF00 CONTROL |
AF01 | AF02 | AF03 | AF04 | AF05 | AF06 | AF07 | AF08 | AF09 | AF10 | |
| . Static control | . Dynamic control | . Waste gas analysis | . Steel-melting temperature measurement | . Steel-melting component measurement | . Furnace weight measurement | . Acoustic measurement | . Vibration measurement | . Flame brightness measurement | . Others | |||
| BA | BA00 WASTE GASES |
BA01 | BA02 | BA03 | BA04 | BA05 | BA06 | BA07 | BA08 | BA09 | BA10 | |
| . Waste gas recovery | . . Skirt section sealing | . Recovery when furnace is tilted | . . Waste gas flow rate control | . . Hood internal pressure measurement | . Waste heat recovery | . . Cooling water circulation | . Sensible heat recovery | . Dust collection | . Others | |||
| BB | BB00 FURNACE UNITS |
BB01 | BB02 | BB03 | BB10 | |||||||
| . Furnace unit shape and construction | . Furnace walls | . . Furnace wall cooling | . Others | |||||||||
| BC | BC00 REFRACTORY LININGS |
BC01 | BC02 | BC03 | BC04 | BC10 | ||||||
| . Brick-layed structure | . Sprayed-on structure | . Component composition | . Dry heating | . Others | ||||||||
| BD | BD00 STEEL DISCHARGING |
BD01 | BD02 | BD03 | BD04 | BD10 | ||||||
| . Steel discharging doors | . Steel discharging door repair | . Steel discharging door opening/closing | . . Separation of molten steel and slag | . Others | ||||||||
| BE | BE00 CHARGING |
BE01 | BE02 | BE03 | BE05 | BE06 | BE10 | |||||
| . Charging doors | . . Charging door cooling | . Removal of adhered metal | . Raw material transport and charging | . . Input sheets | . Others | |||||||
| BF | BF00 LANCES |
BF01 | BF02 | BF03 | BF04 | BF05 | BF06 | BF07 | BF10 | |||
| . Lance shape and structure | . . Prevention of metal adherence | . . Nozzle holes | . Lance-associated means | . . Vertical adjustment of lance | . . Rotational adjustment of lance | . Immersion lances | . Others | |||||
| BG | BG00 BOTTOM TUYERES |
BG01 | BG02 | BG03 | BG04 | BG10 | ||||||
| . Tuyere shape and structure | . . Porous | . Replacement and repair | . . Tuyere periphery repair | . Others | ||||||||
| BH | BH00 FURNACE TILTING |
BH01 | BH02 | BH03 | BH05 | BH10 | ||||||
| . Tilt control | . Bearings | . Furnace unit support | . Furnace rotation and rocking | . Others | ||||||||
| CA | CA00 OTHERS |
CA01 | CA02 | CA03 | ||||||||
| . Detection and measurement means | . . Sub-lances | . . Probes |