GB1326715A - Tunnel furnace for the heat treatment of articles - Google Patents
Tunnel furnace for the heat treatment of articlesInfo
- Publication number
- GB1326715A GB1326715A GB154371A GB154371A GB1326715A GB 1326715 A GB1326715 A GB 1326715A GB 154371 A GB154371 A GB 154371A GB 154371 A GB154371 A GB 154371A GB 1326715 A GB1326715 A GB 1326715A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas
- nozzles
- hearths
- cushion
- hearth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/63—Continuous furnaces for strip or wire the strip being supported by a cushion of gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
- F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
- F27B9/2476—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor the conveyor being constituted by air cushion
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Tunnel Furnaces (AREA)
- Furnace Details (AREA)
Abstract
1326715 Tunnel kilns COMPAGNIE GENERALE D'ELECTRO-CERAMIQUE 12 Jan 1971 [14 Jan 1970] 1543/71 Heading F4B In a tunnel kiln for firing ceramic articles, which are supported on a cushion of gas issuing from one or more perforated or porous ceramic hearths 1a, 1b, a mixing chamber 4a, 4b is provided below the or each horizontal or slightly sloping hearth, into which chambers fuel gas from nozzles 5a, 5b, and a forced air supply from nozzles 17 are passed to form the supporting cushion of combustion gases. The mixing chambers may be divided into compartments. The flat or slightly curved hearths may be supported through columns 2 on a support structure, either as shown in the form of assembled blocks 11, or a monolithic structure (Fig. 1, not shown), or the hearth may be combined with the support structure in the form of a hollow box beam (Fig. 3, not shown), assembled beams making up the hearth length. The pressure of the gas supplies through the nozzles 5a, 5b to the mixing chambers 4a, 4b may be periodically oscillated so that an even gas flow over the whole chamber over a given time period is obtained. In an alternative embodiment (Fig. 2, not shown) the fuel gas and air inlet nozzles to the mixing chamber are coaxially arranged and may be aligned with the hearth perforations to minimize gas spread in the mixing chamber. The gas discharge perforations in the hearths may be of divergent or divergent-convergent form. Gases from above the hearths may be withdrawn through the duct between the walls 15a, 156, the injector action of the air jets from nozzles 17 recycling these gases from well 18 up through Venturi passages 12 in the blocks 11 into the mixing chamber 4a, 4b. In modifications (not shown) the supporting gases may be formed by combustion of liquid fuel, or gas to form a cushion may be heated by electrical resistors or inductors. Supplementary burners 10, or electrical resistors or inductors are provided. Flat articles are supported directly by the gas cushion, other articles by an intermediate support plate carried on the gas curtain.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7001288A FR2074651B1 (en) | 1970-01-14 | 1970-01-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1326715A true GB1326715A (en) | 1973-08-15 |
Family
ID=9049030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB154371A Expired GB1326715A (en) | 1970-01-14 | 1971-01-12 | Tunnel furnace for the heat treatment of articles |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE761211A (en) |
| DE (1) | DE2101440A1 (en) |
| FR (1) | FR2074651B1 (en) |
| GB (1) | GB1326715A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017132476A1 (en) * | 2016-01-29 | 2017-08-03 | Corning Incorporated | Thermally treated metallic materials and related methods |
| US20180209736A1 (en) * | 2017-01-23 | 2018-07-26 | Kiln Drying Systems & Components, Inc. | Vertically Integrated Dual Return Assembly |
| CN114702297A (en) * | 2022-04-26 | 2022-07-05 | 广东东唯新材料有限公司 | One-time firing process of curved ceramic rock plate |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668428B (en) * | 2018-12-29 | 2024-06-14 | 湖南金炉科技股份有限公司 | Heat treatment kiln |
-
1970
- 1970-01-14 FR FR7001288A patent/FR2074651B1/fr not_active Expired
-
1971
- 1971-01-05 BE BE761211A patent/BE761211A/en unknown
- 1971-01-12 GB GB154371A patent/GB1326715A/en not_active Expired
- 1971-01-13 DE DE19712101440 patent/DE2101440A1/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017132476A1 (en) * | 2016-01-29 | 2017-08-03 | Corning Incorporated | Thermally treated metallic materials and related methods |
| US20180209736A1 (en) * | 2017-01-23 | 2018-07-26 | Kiln Drying Systems & Components, Inc. | Vertically Integrated Dual Return Assembly |
| US10520253B2 (en) * | 2017-01-23 | 2019-12-31 | Kiln Drying Systems & Components, Llc | Vertically integrated dual return assembly |
| CN114702297A (en) * | 2022-04-26 | 2022-07-05 | 广东东唯新材料有限公司 | One-time firing process of curved ceramic rock plate |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2074651A1 (en) | 1971-10-08 |
| DE2101440A1 (en) | 1971-07-22 |
| BE761211A (en) | 1971-07-05 |
| FR2074651B1 (en) | 1976-03-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |