GB122828A - Improvements in Electric Furnaces. - Google Patents
Improvements in Electric Furnaces.Info
- Publication number
- GB122828A GB122828A GB364/19A GB36419A GB122828A GB 122828 A GB122828 A GB 122828A GB 364/19 A GB364/19 A GB 364/19A GB 36419 A GB36419 A GB 36419A GB 122828 A GB122828 A GB 122828A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas
- electrode
- graphite
- furnace
- ring electrode
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/04—Pressure vessels, e.g. autoclaves
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
- C01B21/072—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with aluminium
- C01B21/0726—Preparation by carboreductive nitridation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—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
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
- F27D11/02—Ohmic resistance heating
- F27D11/04—Ohmic resistance heating with direct passage of current through the material being heated
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/60—Heating arrangements wherein the heating current flows through granular powdered or fluid material, e.g. for salt-bath furnace, electrolytic heating
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Details (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Ceramic Products (AREA)
- Discharge Heating (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
122,828. Armour Fertilizer Works, (Assignees of Shoeld, M.). Jan. 28, 1918, [Convention date]. Electrode furnaces.-In furnace suitable for making aluminium nitride, the solid material and gas travel continuously between an axial vertical electrode 23 and a ring electrode 26. The gas, such as nitrogen with or without a little carbon monoxide, may be supplied from pipes 34, 35 below the furnace, so as to pass in the opposite direction to the material. By the action of the cool material and the cool gas, the electric current is confined to a narrow zone. The ring electrode 26 may be constructed of graphite blocks, embedded in a less conductive carbon lining 11. This is surrounded successively by refractory bricks 12, fire-brick 13, other bricks 16, and a metal casing. The furnace chamber may be octagonal in cross-section. From diametrically opposite points of the ring electrode project graphite connecting-rods 27, 28 sealed at 32 by asbestos cement and encircled by conducting clamps 29 cooled by sprays 30. The axial electrode passes through a conducting water-cooled clamp 24 also sealed by asbestos cement. The material is charged into the flared upper end of the chamber by way of two diverging passages 19, 20, provided with gas exits 21 and poke holes 22. The material may be briquetted with a slight excess of carbon, to protect the electrodes and lining. A cooling coil 33 may be embedded in the upper part of the fire-brick. A gas-tight discharge device is provided. A priming of graphite is used at starting.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US86379XA | 1918-01-28 | 1918-01-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB122828A true GB122828A (en) | 1919-12-31 |
Family
ID=21732760
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB364/19A Expired GB122828A (en) | 1918-01-28 | 1919-01-06 | Improvements in Electric Furnaces. |
| GB365/19A Expired GB122829A (en) | 1918-01-28 | 1919-01-06 | A Process of Producing Aluminium Nitride. |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB365/19A Expired GB122829A (en) | 1918-01-28 | 1919-01-06 | A Process of Producing Aluminium Nitride. |
Country Status (4)
| Country | Link |
|---|---|
| CH (2) | CH86379A (en) |
| DE (2) | DE342636C (en) |
| FR (1) | FR497290A (en) |
| GB (2) | GB122828A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1327707A (en) * | 1956-07-31 | 1963-05-24 | Pechiney Prod Chimiques Sa | Aluminum nitride manufacturing process |
| DK0519806T3 (en) * | 1991-06-19 | 1997-09-22 | Atochem Elf Sa | Continuous process for the preparation of aluminum nitride by carbonitration of alumina |
-
1919
- 1919-01-06 GB GB364/19A patent/GB122828A/en not_active Expired
- 1919-01-06 GB GB365/19A patent/GB122829A/en not_active Expired
- 1919-03-11 CH CH86379D patent/CH86379A/en unknown
- 1919-03-11 CH CH86474D patent/CH86474A/en unknown
- 1919-03-18 FR FR497290A patent/FR497290A/en not_active Expired
-
1920
- 1920-03-03 DE DE1920342636D patent/DE342636C/en not_active Expired
- 1920-03-04 DE DE1920349436D patent/DE349436C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB122829A (en) | 1920-04-06 |
| CH86474A (en) | 1920-09-01 |
| DE349436C (en) | 1922-03-02 |
| CH86379A (en) | 1920-08-16 |
| FR497290A (en) | 1919-12-02 |
| DE342636C (en) | 1921-10-21 |
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