CPC Definition - Subclass F27D

Last Updated Version: 2016.11
DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE (combustion apparatus F23)
Definition statement

This place covers:

Details, accessories of furnaces, kilns or ovens in general, not for specific furnaces, kilns or ovens

Relationships with other classification places

The details or accessories for specific furnaces, kilns or ovens are classified in F27B subgroups

Special rules of classification

Indexing Codes should be used as additional information or in case an CPC symbol is given and more detailed Indexing Codes are existing, these more detailed Indexing Codes should also be given.

Casings; Linings; Walls; Roofs (refractory materials C04B; firebridges for combustion chambers F23M 3/00)
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Linings for casting-melt holding vessels

B22D 41/02

Clay-wares and shaped ceramic products

C04B 33/00, C04B 35/00

Walls, e.g. partitions, for buildings

E04B 2/12

Protection of pipes or pipe fittings; thermal insulation in general

F16L 58/00, F16L 59/00

Shape of bricks or blocks used in combustion chambers

F23M 5/02

{Linings or walls comprising heat shields, e.g. heat shieldsd (shields protecting the charge F27D 5/00)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Shields protecting the charge

F27D 5/00

Crowns; Roofs
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Crowns and roofs in combustion chambers

F23M 5/06

Monolithic linings; Supports therefor
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Supports for linings

F27D 1/14

Heat-exchange apparatus

F28D 1/00 - F28D 21/00

Supports for linings (F27D 1/10 takes precedence)
References
Limiting references

This place does not cover:

Supports for monolithic linings

F27D 1/10

Making or repairing linings {increasing the durability of linings or breaking away linings}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Equipment used for making or repairing linings, e.g. by flame gunning

C21C 5/441, C21C 5/443

Charging; Discharging; Manipulation of charge (moving charge through a furnace F27B 9/14)
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Charging of the electric furnace

C21C 5/527

Moving charge through furnace

F27B 9/14

{of metallic workpieces}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Charging, discharging and manipulation of charges in heat treatment furnaces, e.g. with rolls

C21D 9/0012, C21D 9/0018

{transport or conveyor rolls for furnaces; roller rails (conveyor rolls in general B65G)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Rollers in rolling mills

B21B 39/00

Rolls in continuous casting

B22D 11/1287

Conveyor rolls in general

B65G 39/02, B65G 13/00, B65G 13/02, B65G 13/04

Roller conveyors for transporting glass sheets

C03B 35/16

Screw feeders; Screw dischargers
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Screw conveyors in general processes

B01J 8/0045

Screw conveyors in general

B65G 65/46, B65G 33/18, B65G 53/48

Tapping equipment; Equipment for removing {or retaining} slag
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Closure equipment in casting melt-holding vessels

B22D 41/14, B22D 41/16, B22D 41/22, B22D 41/44

Tap-holes and repairing top-holes in steel making converters

C21C 5/4653, C21C 5/445

{Taphole forming equipment, e.g. boring machines, piercing tools}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Opening or sealing the tap-hole of blast furnaces

C21B 7/12

Introducing a fluid jet or current into the charge {(porous elements for gas flushing of molten metals B22D 1/005)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Injection assemblies for treating melt in ladles or runners before casting

B22D 1/005

Injection of gases into liquid metals in ladles

B22D 1/005

Devices for accelerating or decelerating flow of the materials

B65G 53/58

Tuyeres for blast furnaces

C21B 7/16

Bottoms or tuyeres for converters

C21C 5/48

Burners or injectors for injecting pulverulent materials into the furnace

C21C 5/5217

Treating molten ferrous alloy by injecting powdered material

C21C 7/0037

Charging particulate material using a fluid carrier
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Lances or injectors for steel production in converters

C21C 5/4606

Burners or injectors for injecting gas

C21C 5/5217

Supports, screens, or the like for the charge within the furnace (travelling or movable supports F27D 3/12)
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Travelling or movable supports

F27D 3/12

Setting, e.g. drying, dehydrating or firing ceramic articles

B28B 11/243

Supports, baskets, containers or covers for heat treatment

C21D 9/0025

Details of grates for burning waste materials

F23H 17/00 - F23H 17/12

Elements for supporting goods to be dried

F26B 25/185

{Treatment baskets for ceramic articles (for metallic articles C21D 9/0025)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Treatment baskets for metallic articles

C21D 9/0025

{Shields for the charge (shields for the lining F27D 1/0033)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Shields for the lining

F27D 1/0033

Forming, maintaining, or circulating atmospheres in heating chambers
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

General devices for heat treatment with forced gas circulation; under reduced pressure or vacuum

C21C1/74, C21D 1/767, C21D 1/773

Arrangement of elements for electric heating in or on furnaces (electric heating per se H05B)
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Electric heating in general

H05B 3/00, H05B 7/00

Ohmic resistance heating
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Ohmic resistance heating in general and specially adapted for furnaces

H05B 3/00, H05B 3/62, H05B 3/64

Disposition of electrodes (automatic control of temperature G05D 23/00; electric discharge apparatus H01T; arrangements for feeding or guiding electrodes H05B 7/10; automatic control of power by positioning of electrodes H05B 7/144)
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Control of temperature

G05D

Arrangements of feeding or guiding electrodes

H05B 7/10

Automatic control of power by positioning of electrodes

H05B 7/144

{Preheating scrap (preheating of scrap for steel making C21C 5/565)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Preheating of scrap for steel production

C21C 5/565

{comprising a cooling grate}
Definition statement

This place covers:

Cooling of discharged material comprising a cooling grate.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Conveyors in general comprising a cyclically-moving

B65G 25/00

Heat-exchange apparatus, whereby particulate material forming a bed, e.g. fluidised, on vibratory sieves

F28C 3/16

{Extraction of waste gases, collection of fumes and hoods used therefor (in general B08B 15/00)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Preventing escape of dirt or fumes from the area where they are produced

B08B 15/00

Removal of waste gases or dust coming from steel making converters

C21C 5/38 - C21C 5/40

{of waste gases emanating from an electric arc furnace}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Working up flue dust

C22B 7/02

Arrangements of controlling devices
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Arrangement of controlling devices in shaft furnaces

F27B 1/26

Arrangement of controlling devices in hearth type furnaces

F27B 3/28

Arrangement of controlling devices in muffle furnaces

F27B 5/18

Arrangement of controlling devices in rotary drum furnaces

F27B 7/42

Arrangement of controlling devices in tunnel furnaces

F27B 9/40

Arrangement of controlling devices in ring type furnaces

F27B 13/14

Arrangement of controlling devices in crucible or pot furnaces

F27B 14/20

Arrangement of controlling devices in fluidized bed furnaces

F27B 15/18

Arrangements of monitoring devices; Arrangements of safety devices
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Test rods or other checking devices in blast furnaces

C21B 7/24

Measuring and sampling devices in steel making converters

C21C 5/4673, C21C 2005/5288

Arrangement of monitoring devices in shaft furnaces

F27B 1/28

Arrangement of monitoring devices in hearth type furnaces

F27B 3/28

Arrangement of monitoring devices in muffle furnaces

F27B 5/18

Arrangement of monitoring devices in rotary drum furnaces

F27B 7/42

Arrangement of monitoring devices in tunnel furnaces

F27B 9/40

Arrangement of monitoring devices in ring type furnaces

F27B 13/14

Arrangement of monitoring devices in crucible or pot furnaces

F27B 14/20

Arrangement of monitoring devices in fluidized bed furnaces

F27B 15/18

Measuring temperature and heat quantity in general

G01K 1/00 - G01K 19/00

{comprising breaking tools, e.g. hammers, drills, scrapers (breaking away linings F27D 1/1694; boring machines for forming tapholes F27D 3/1527)}
Definition statement

This place covers:

Devices for removing incrustations, e.g. slag, metal deposits, dust,

comprising breaking tools like hammers, drills, scrapers;

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Breaking away linings

F27D 1/1694

Boring machines for forming tap-holes

F27D 3/1527

Stirring devices for molten material (F27D 3/14 takes precedence)
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Mixers in general

B01F 13/00, B01F 13/08, B01F 13/0809

Refining metals including stirring

C22B 9/05, C22B 9/055, C22B 21/06, C22B 21/064, C22B 21/066

Electrodynamics pumps

H02K 44/02, H02K 44/04, H02K 44/06

Subject matter not provided for in other groups of this subclass
Definition statement

This place covers:

Details or accessories not covered by any preceding group

{Electric heating elements or system}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Electric heating in general

H05B 1/00 - H05B 7/225

{using burners (manufacture of steel in an electric arc furnace equipped with burners C21C 5/5217)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Burners for combustion of gas in general

F27D14/00 - F27D14/84

Burners used for glass melting

C03B 5/2353

Manufacture of steel in electric arc furnaces equipped with burners

C21C 5/5217

Burners in combustion in general

F23D 17/00 - F23D 17/007