Cooperative Patent Classification

Indent Level

Version: 2016.11
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) [2013-01]
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
.
Crucible furnace process {(C21C 5/005 takes precedence)} [2013-01]
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
.
Manufacture of steel in the converter {(C21C 5/005 takes precedence)} [2013-01]
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
. . .
Blowing from above (C21C 5/35 takes precedence) [2013-01]
C21C 5/34
. . .
Blowing through the bath (C21C 5/35 takes precedence) [2013-01]
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 5/40
. . .
Offtakes or separating apparatus for converter 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
. .
Treatment with gases (C21C 7/06, C21C 7/064, C21C 7/068 take precedence) [2013-01]
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]