C21B3/00	7	General features in the manufacture of pig-iron (mixers for pig-iron C21C1/06)	C21B3/00	C21B3/00		39
C21B3/02	8	by applying additives, e.g. fluxing agents	C21B3/02	C21B3/02		208
C21B3/04	8	Recovery of by-products, e.g. slag	C21B3/04	C21B3/04		794
C21B3/06	9	Treatment of liquid slag	C21B3/06	C21B3/06		1948
C21B3/08	10	Cooling slag	C21B3/08	C21B3/08		2244
C21B3/10	10	Slag pots; Slag cars	C21B3/10	C21B3/10		560
C21B5/00	7	Making pig-iron in the blast furnace	C21B5/00	C21B5/00		1397
C21B5/001	8	{Injecting additional fuel or reducing agents}	C21B5/00	C21B5/00		924
C21B5/002	9	{Heated electrically (plasma)}	C21B5/00	C21B5/00		146
C21B5/003	9	{Injection of pulverulent coal}	C21B5/00	C21B5/00		1324
C21B5/004	10	{Injection of slurries}	C21B5/00	C21B5/00		103
C21B2005/005	9	{Selection or treatment of the reducing gases}	C21B5/00	C21B5/00		250
C21B5/006	8	{Automatically controlling the process}	C21B5/00	C21B5/00		1172
C21B5/007	8	{Conditions of the cokes or characterised by the cokes used}	C21B5/00	C21B5/00		531
C21B5/008	8	{Composition or distribution of the charge}	C21B5/00	C21B5/00		1677
C21B5/02	8	Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals	C21B5/02	C21B5/02		282
C21B5/023	9	{Injection of the additives into the melting part}	C21B5/02	C21B5/02		211
C21B5/026	10	{of plastic material}	C21B5/02	C21B5/02		98
C21B5/04	8	Making slag of special composition	C21B5/04	C21B5/04		265
C21B5/06	8	using top gas in the blast furnace process	C21B5/06	C21B5/06		791
C21B7/00	7	Blast furnaces	C21B7/00	C21B7/00		1142
C21B7/002	8	{Evacuating and treating of exhaust gases}	C21B7/00	C21B7/00		868
C21B7/005	9	{Bleeder valves or slides}	C21B7/00	C21B7/00		85
C21B7/007	8	{Controlling or regulating of the top pressure}	C21B7/00	C21B7/00		283
C21B7/02	8	Internal forms	C21B7/02	C21B7/02		158
C21B7/04	8	with special refractories	C21B7/04	C21B7/04		139
C21B7/06	9	Linings for furnaces	C21B7/06	C21B7/06		679
C21B7/08	8	Top armourings	C21B7/08	C21B7/08		133
C21B7/10	8	Cooling; Devices therefor	C21B7/10	C21B7/10		1580
C21B7/103	9	{Detection of leakages of the cooling liquid}	C21B7/10	C21B7/10		121
C21B7/106	9	{Cooling of the furnace bottom}	C21B7/10	C21B7/10		138
C21B7/12	8	Opening or sealing the tap holes	C21B7/12	C21B7/12		1078
C21B7/125	9	{Refractory plugging mass}	C21B7/12	C21B7/12		186
C21B7/14	8	Discharging devices, e.g. for slag	C21B7/14	C21B7/14		1041
C21B7/16	8	Tuy&#233;res	C21B7/16	C21B7/16		1437
C21B7/163	9	{Blowpipe assembly}	C21B7/16	C21B7/16		466
C21B7/166	9	{Tuyere replacement apparatus}	C21B7/16	C21B7/16		132
C21B7/18	8	Bell-and-hopper arrangements	C21B7/18	C21B7/18		1467
C21B7/20	9	with appliances for distributing the burden	C21B7/20	C21B7/20		1104
C21B7/205	10	{Details concerning the gear-box driving the charge distribution system}	C21B7/20	C21B7/20		36
C21B7/22	8	Dust arresters	C21B7/22	C21B7/22		549
C21B7/24	8	Test rods or other checking devices	C21B7/24	C21B7/24		2293
C21B9/00	7	Stoves for heating the blast in blast furnaces	C21B9/00	C21B9/00		760
C21B9/02	8	Brick hot-blast stoves	C21B9/02	C21B9/02		80
C21B9/04	9	with combustion shaft	C21B9/04	C21B9/04		88
C21B9/06	9	Linings	C21B9/06	C21B9/06		336
C21B9/08	8	Iron hot-blast stoves	C21B9/08	C21B9/08		22
C21B9/10	8	Other details, e.g. blast mains	C21B9/10	C21B9/10		783
C21B9/12	9	Hot-blast valves or slides for blast furnaces	C21B9/12	C21B9/12		474
C21B9/14	8	Preheating the combustion air	C21B9/14	C21B9/14		182
C21B9/16	8	Cooling or drying the hot-blast	C21B9/16	C21B9/16		182
C21B11/00	7	Making pig-iron other than in blast furnaces	C21B11/00	C21B11/00		459
C21B11/02	8	in low shaft furnaces {or shaft furnaces}	C21B11/02	C21B11/02		391
C21B11/06	8	in rotary kilns	C21B11/06	C21B11/06		98
C21B11/08	8	in hearth-type furnaces	C21B11/08	C21B11/08		94
C21B11/10	8	in electric furnaces	C21B11/10	C21B11/10		388
C21B13/00	7	Making spongy iron or liquid steel, by direct processes	C21B13/00	C21B13/00		991
C21B13/0006	8	{obtaining iron or steel in a molten state}	C21B13/00	C21B13/00		917
C21B13/0013	9	{introduction of iron oxide into a bath of molten iron containing a carbon reductant}	C21B13/00	C21B13/00		235
C21B13/002	10	{Reduction of iron ores by passing through a heated column of carbon}	C21B13/00	C21B13/00		459
C21B13/0026	9	{introduction of iron oxide in the flame of a burner or a hot gas stream}	C21B13/00	C21B13/00		204
C21B13/0033	8	{In fluidised bed furnaces or apparatus containing a dispersion of the material}	C21B13/00	C21B13/00		861
C21B13/004	8	{in a continuous way by reduction from ores}	C21B13/00	C21B13/00		178
C21B13/0046	8	{making metallised agglomerates or iron oxide}	C21B13/00	C21B13/00		556
C21B13/0053	9	{On a massing grate}	C21B13/00	C21B13/00		88
C21B13/006	8	{Starting from ores containing non ferrous metallic oxides}	C21B13/00	C21B13/00		601
C21B13/0066	8	{Preliminary conditioning of the solid carbonaceous reductant}	C21B13/00	C21B13/00		653
C21B13/0073	8	{Selection or treatment of the reducing gases}	C21B13/00	C21B13/00		2008
C21B13/008	8	{Use of special additives or fluxing agents}	C21B13/00	C21B13/00		621
C21B13/0086	8	{Conditioning, transformation of reduced iron ores}	C21B13/00	C21B13/00		633
C21B13/0093	9	{Protecting against oxidation}	C21B13/00	C21B13/00		110
C21B13/02	8	in shaft furnaces	C21B13/02	C21B13/02		1156
C21B13/023	9	{wherein iron or steel is obtained in a molten state}	C21B13/02	C21B13/02		216
C21B13/026	10	{heated electrically}	C21B13/02	C21B13/02		71
C21B13/029	9	{Introducing coolant gas in the shaft furnaces}	C21B13/02	C21B13/02		182
C21B13/04	8	in retorts	C21B13/04	C21B13/04		204
C21B13/06	8	in multi-storied furnaces	C21B13/06	C21B13/06		163
C21B13/08	8	in rotary furnaces	C21B13/08	C21B13/08		989
C21B13/085	9	{wherein iron or steel is obtained in a molten state}	C21B13/08	C21B13/08		183
C21B13/10	8	in hearth-type furnaces	C21B13/10	C21B13/10		440
C21B13/105	9	{Rotary hearth-type furnaces}	C21B13/10	C21B13/10		426
C21B13/12	8	in electric furnaces	C21B13/12	C21B13/12		853
C21B13/125	9	{By using plasma}	C21B13/12	C21B13/12		138
C21B13/14	8	Multi-stage processes {processes carried out in different vessels or furnaces}	C21B13/14	C21B13/14		1332
C21B13/143	9	{Injection of partially reduced ore into a molten bath}	C21B13/14	C21B13/14		405
C21B13/146	9	{Multi-step reduction without melting}	C21B13/14	C21B13/14		220
C21B15/00	7	Other processes for the manufacture of iron from iron compounds (by electrolysis C25C1/06)	C21B15/00	C21B15/00		324
C21B15/003	8	{By using nuclear energy}	C21B15/00	C21B15/00		12
C21B15/006	8	{By a chloride process}	C21B15/00	C21B15/00		91
C21B15/02	8	Metallothermic processes, e.g. thermit reduction	C21B15/02	C21B15/02		73
C21B15/04	8	from iron carbonyl	C21B15/04	C21B15/04		29
C21B2100/00	7	Handling of exhaust gases produced during the manufacture of iron or steel	CPCONLY	C21B2100/00		51
C21B2100/20	8	Increasing the gas reduction potential of recycled exhaust gases	CPCONLY	C21B2100/20		170
C21B2100/22	9	by reforming	CPCONLY	C21B2100/22		478
C21B2100/24	9	by shift reactions	CPCONLY	C21B2100/24		141
C21B2100/26	9	by adding additional fuel in recirculation pipes	CPCONLY	C21B2100/26		288
C21B2100/28	9	by separation	CPCONLY	C21B2100/28		66
C21B2100/282	10	of carbon dioxide	CPCONLY	C21B2100/282		501
C21B2100/284	10	of nitrogen	CPCONLY	C21B2100/284		55
C21B2100/40	8	Gas purification of exhaust gases to be recirculated or used in other metallurgical processes	CPCONLY	C21B2100/40		108
C21B2100/42	9	Sulphur removal	CPCONLY	C21B2100/42		295
C21B2100/44	9	Removing particles, e.g. by scrubbing, dedusting	CPCONLY	C21B2100/44		957
C21B2100/60	8	Process control or energy utilisation in the manufacture of iron or steel	CPCONLY	C21B2100/60		190
C21B2100/62	9	Energy conversion other than by heat exchange, e.g. by use of exhaust gas in energy production	CPCONLY	C21B2100/62		318
C21B2100/64	9	Controlling the physical properties of the gas, e.g. pressure or temperature	CPCONLY	C21B2100/64		526
C21B2100/66	9	Heat exchange	CPCONLY	C21B2100/66		743
C21B2100/80	8	Interaction of exhaust gases produced during the manufacture of iron or steel with other processes	CPCONLY	C21B2100/80		145
C21B2200/00	7	Recycling of non-gaseous waste material	CPCONLY	C21B2200/00		363
C21B2300/00	7	Process aspects	CPCONLY	C21B2300/00		16
C21B2300/02	8	Particular sequence of the process steps	CPCONLY	C21B2300/02		68
C21B2300/04	8	Modeling of the process, e.g. for control purposes; CII	CPCONLY	C21B2300/04		511
C21B2400/00	7	Treatment of slags originating from iron or steel processes	CPCONLY	C21B2400/00		5
C21B2400/02	8	Physical or chemical treatment of slags	CPCONLY	C21B2400/02		437
C21B2400/022	9	Methods of cooling or quenching molten slag	CPCONLY	C21B2400/022		263
C21B2400/024	10	with the direct use of steam or liquid coolants, e.g. water	CPCONLY	C21B2400/024		1523
C21B2400/026	10	using air, inert gases or removable conductive bodies	CPCONLY	C21B2400/026		967
C21B2400/028	10	with the permanent addition of cooled slag or other solids	CPCONLY	C21B2400/028		82
C21B2400/03	9	Removing sulfur	CPCONLY	C21B2400/03		24
C21B2400/032	9	Separating slag from liquid, e.g. from water, after quenching	CPCONLY	C21B2400/032		219
C21B2400/034	9	Stirring or agitating by pressurised fluids or by moving apparatus	CPCONLY	C21B2400/034		132
C21B2400/04	8	Specific shape of slag after cooling	CPCONLY	C21B2400/04		35
C21B2400/042	9	Sheets	CPCONLY	C21B2400/042		47
C21B2400/044	9	Briquettes or moulded bodies other than sheets	CPCONLY	C21B2400/044		96
C21B2400/05	8	Apparatus features	CPCONLY	C21B2400/05		222
C21B2400/052	9	including rotating parts	CPCONLY	C21B2400/052		495
C21B2400/054	10	Disc-shaped or conical parts for cooling, dispersing or atomising of molten slag rotating along vertical axis	CPCONLY	C21B2400/054		166
C21B2400/056	10	Drums whereby slag is poured on or in between	CPCONLY	C21B2400/056		376
C21B2400/058	10	Rotating beds on which slag is cooled	CPCONLY	C21B2400/058		18
C21B2400/06	9	Conveyors on which slag is cooled	CPCONLY	C21B2400/06		172
C21B2400/062	9	Jet nozzles or pressurised fluids for cooling, fragmenting or atomising slag	CPCONLY	C21B2400/062		771
C21B2400/064	9	Thermally-conductive removable bodies, e.g. balls	CPCONLY	C21B2400/064		56
C21B2400/066	9	Receptacle features where the slag is treated	CPCONLY	C21B2400/066		66
C21B2400/068	10	with a sealed or controlled environment	CPCONLY	C21B2400/068		187
C21B2400/07	10	open to atmosphere	CPCONLY	C21B2400/07		92
C21B2400/072	10	Tanks to collect the slag, e.g. water tank	CPCONLY	C21B2400/072		602
C21B2400/074	10	Tower structures for cooling, being confined but not sealed	CPCONLY	C21B2400/074		219
C21B2400/076	10	Fluidised bed for cooling	CPCONLY	C21B2400/076		89
C21B2400/08	8	with energy recovery	CPCONLY	C21B2400/08		837
