GB1375476A - - Google Patents
Info
- Publication number
- GB1375476A GB1375476A GB3414372A GB3414372A GB1375476A GB 1375476 A GB1375476 A GB 1375476A GB 3414372 A GB3414372 A GB 3414372A GB 3414372 A GB3414372 A GB 3414372A GB 1375476 A GB1375476 A GB 1375476A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fumes
- alumina
- fluoride
- filter
- july
- 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
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/22—Collecting emitted gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/48—Halides, with or without other cations besides aluminium
- C01F7/50—Fluorides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Electrochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Treating Waste Gases (AREA)
- Electrolytic Production Of Metals (AREA)
- Jib Cranes (AREA)
Abstract
1375476 Dry - scrubbing fluoride fumes ARDAL OG SUNNDAL VERK AS 21 July 1972 [22 July 1971] 34143/72 Headings B1L and BIT [Also in Division Cl] Flouride- and sulphur-containing fumes from aluminium electrolytic cells are filtered and dry-scrubbed for selective removal of fluoride. Alumina is added to the fumes for reaction with fluorides present and is then removed by filtration in one or more filter units, the alumina being added not more than one metre upstream of the filter units or in each filter unit itself such as to give a contact time which means that fluoride is selectively absorbed. The alumina used contains a low content of alpha crystals and is reactive to fluoride. In the embodiment of Fig. 2 a number of bag filters 7 are mounted in a housing with fumes inlet 6 and filter fumes outlet 10. Alumina is dispensed from tubes 8 and falls in counter-current to the fumes. An outlet 9 is provided for the alumina.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO280271A NO126628B (en) | 1971-07-22 | 1971-07-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1375476A true GB1375476A (en) | 1974-11-27 |
Family
ID=19879155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3414372A Expired GB1375476A (en) | 1971-07-22 | 1972-07-21 |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS49107958A (en) |
| AU (1) | AU4472472A (en) |
| BR (1) | BR7204898D0 (en) |
| CA (1) | CA965223A (en) |
| DE (1) | DE2236030A1 (en) |
| FR (1) | FR2146505B3 (en) |
| GB (1) | GB1375476A (en) |
| IS (1) | IS2090A7 (en) |
| IT (1) | IT961645B (en) |
| NL (1) | NL7210074A (en) |
| NO (1) | NO126628B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4176019A (en) * | 1977-03-10 | 1979-11-27 | Ardal Og Sunndal Verk A.S. | Process and apparatus for treatment of waste gases |
| CN102485963A (en) * | 2010-12-02 | 2012-06-06 | 沈阳铝镁设计研究院有限公司 | Structure for controlling wind pressure balance of aluminium electrolysis-based purification flue gas pipeline |
| CN111549358A (en) * | 2020-06-20 | 2020-08-18 | 百色皓海碳素有限公司 | Hot gas recovery device for prebaked anode aluminum electrolytic cell |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE467952B (en) * | 1990-04-27 | 1992-10-12 | Flaekt Ab | SET AND DEVICE TO INCREASE THE EXTENSION OF USE FOR A DRY SORBENT |
| IS3896A (en) * | 1991-08-07 | 1993-02-08 | Comalco Aluminium Limited | Purification of gaseous fluorides from industrial emissions |
| TW279242B (en) * | 1994-11-29 | 1996-06-21 | Asahi Denka Kogyo Kk | The wasted-gas processing method & device for CVD apparatus |
-
1971
- 1971-07-22 NO NO280271A patent/NO126628B/no unknown
-
1972
- 1972-07-17 IS IS2090A patent/IS2090A7/en unknown
- 1972-07-19 AU AU44724/72A patent/AU4472472A/en not_active Expired
- 1972-07-20 NL NL7210074A patent/NL7210074A/xx unknown
- 1972-07-21 BR BR489872A patent/BR7204898D0/en unknown
- 1972-07-21 FR FR7226501A patent/FR2146505B3/fr not_active Expired
- 1972-07-21 CA CA147,698A patent/CA965223A/en not_active Expired
- 1972-07-21 JP JP47072623A patent/JPS49107958A/ja active Pending
- 1972-07-21 GB GB3414372A patent/GB1375476A/en not_active Expired
- 1972-07-21 IT IT5168772A patent/IT961645B/en active
- 1972-07-22 DE DE19722236030 patent/DE2236030A1/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4176019A (en) * | 1977-03-10 | 1979-11-27 | Ardal Og Sunndal Verk A.S. | Process and apparatus for treatment of waste gases |
| CN102485963A (en) * | 2010-12-02 | 2012-06-06 | 沈阳铝镁设计研究院有限公司 | Structure for controlling wind pressure balance of aluminium electrolysis-based purification flue gas pipeline |
| CN111549358A (en) * | 2020-06-20 | 2020-08-18 | 百色皓海碳素有限公司 | Hot gas recovery device for prebaked anode aluminum electrolytic cell |
Also Published As
| Publication number | Publication date |
|---|---|
| NO126628B (en) | 1973-03-05 |
| JPS49107958A (en) | 1974-10-14 |
| FR2146505B3 (en) | 1975-09-05 |
| NL7210074A (en) | 1973-01-24 |
| BR7204898D0 (en) | 1973-05-15 |
| DE2236030A1 (en) | 1973-02-01 |
| IT961645B (en) | 1973-12-10 |
| IS2090A7 (en) | 1972-08-23 |
| AU4472472A (en) | 1974-02-07 |
| CA965223A (en) | 1975-04-01 |
| FR2146505A1 (en) | 1973-03-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 414F | Notice of opposition given (sect. 14/1949) | ||
| 414E | Application relinquished (sect. 14/1949) | ||
| CSNS | Application of which complete specification have been accepted and published, but patent is not sealed |