FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS

Introduced: September 1968

Classification Context

Section:: MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:: FURNACES; KILNS, OVENS OR RETORTS
Subclass:: FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS

Description

F27B encompasses general-purpose furnaces, kilns, ovens, and retorts without restriction to specific heat sources or industrial applications, along with open sintering and related apparatus for materials processing. This classification covers structural designs, construction materials, refractory linings, burner arrangements, heating chamber configurations, and auxiliary equipment common to multiple furnace types. It includes both batch and continuous heating systems used across industries such as ceramics, metallurgy, chemicals, and thermal processing, excluding specialized furnace types assigned to more specific subclasses (F27D for electric furnaces, F27H for melting furnaces). The scope extends to apparatus for sintering, calcination, roasting, and similar high-temperature operations where materials are exposed to direct or indirect heat treatment in open or semi-open configurations.

Scope Notes

Application references: Bakers' ovens; Machines or equipment for baking Furnaces specially adapted for glass manufacture Retorts or ovens for production of gas, coke, tar or similar materials by destructive distillation of carbonaceous materials Furnaces, kilns, ovens or retorts specially adapted for apparatus for cracking hydrocarbons Furnaces, kilns, ovens or retorts for production of gases containing carbon monoxide and hydrogen from solid carbonaceous materials by partial oxidation processes involving oxygen or steam Blast furnaces Stoves for heating the blast in blast furnaces Manufacture of steel in converters General devices for heat treatment of ferrous or non-ferrous metals or alloys Furnaces for electroslag or arc remelting of metals Apparatus or furnaces for melting or fritting enamels Ovens specially adapted for firing enamels

Related Keywords

CHARGING of furnacesFURNACES in generalfurnaces for PUDDLINGTAPPING equipment for furnaces

12 direct subcodes

Child Classifications

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F27B 1/00 Shaft or like vertical or substantially vertical furnaces
F27B 11/00 Bell-type furnaces
F27B 13/00 Furnaces with both stationary charge and progression of heating, e.g. of ring type or of the type in which a segmental kiln moves over a stationary charge
F27B 14/00 Crucible or pot furnaces; Tank furnaces
F27B 15/00 Fluidised-bed furnaces; Other furnaces using or treating finely-divided materials in dispersion
F27B 17/00 Furnaces of a kind not covered by any of groups
F27B 19/00 Combinations of different kinds of furnaces that are not all covered by any single one of main groups
F27B 21/00 Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
F27B 3/00 Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces
F27B 5/00 Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
F27B 7/00 Rotary-drum furnaces, i.e. horizontal or slightly inclined
F27B 9/00 Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity