SU528854A3 - Gas cleaning method - Google Patents

Gas cleaning method

Info

Publication number
SU528854A3
SU528854A3 SU1886541A SU1886541A SU528854A3 SU 528854 A3 SU528854 A3 SU 528854A3 SU 1886541 A SU1886541 A SU 1886541A SU 1886541 A SU1886541 A SU 1886541A SU 528854 A3 SU528854 A3 SU 528854A3
Authority
SU
USSR - Soviet Union
Prior art keywords
alumina
particle size
less
fluorine
cleaning method
Prior art date
Application number
SU1886541A
Other languages
Russian (ru)
Inventor
Хамфрей Минчин Вильям
Джозеф Гернон Гари
Original Assignee
Алкан Рисерч Энл Дивелопмент Лимитед (Фирма)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Алкан Рисерч Энл Дивелопмент Лимитед (Фирма) filed Critical Алкан Рисерч Энл Дивелопмент Лимитед (Фирма)
Application granted granted Critical
Publication of SU528854A3 publication Critical patent/SU528854A3/en

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Classifications

    • 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)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Treating Waste Gases (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Description

Изобретение относитс  к области очистки газов, в частности к способам очистки отход  щх газов электролитического нроизводства алюмини  от фтора, металлической пыли и органических примесей.The invention relates to the field of gas purification, in particular to methods for cleaning waste gas from the electrolytic production of aluminum from fluorine, metal dust and organic impurities.

Известен способ очистки газов от фтора путем его обработки тонкодисперсной ок11сью алюмини , отделени  твердой фазы от газового потока известными способами, термообработкой окиси алюмини  и возврато.м ее в электролизер.A known method of purifying gases from fluorine by treating it with fine aluminum oxide, separating the solid phase from the gas stream by known methods, heat treating aluminum oxide and returning it to the electrolyzer.

При применении тонкодисперсной окиси алюмини  с размерами частиц 40-5 мкм и меньше происходит загр знение ее примес ми железа, а также примес ми углерода и органическими веществами, которые затем окисл ют в процессе термической обработки.When using finely dispersed alumina with particle sizes of 40-5 µm and less, it is contaminated with iron impurities, as well as carbon impurities and organic substances, which are then oxidized during heat treatment.

В результате происход т большие потери окиси алюмини .As a result, large losses of alumina occur.

С целью упрощени  процесса к снижени  потерь окиси алюмини  в предлагаемом способе используют окись алюмини  с размерами частиц 5-100 мкм при содержании частиц с размером меньще 40 мкм 3-10% и отдел ют сначала окись алюмини  с размерами частиц выше 40 мюм, направл   их в электролизер, а затем частицы с размером меньше 40 мкм и подвергают их термообработке известным способом.In order to simplify the process of reducing the loss of alumina in the proposed method, alumina with a particle size of 5-100 µm is used when the content of particles with a size less than 40 µm is 3-10% and alumina is first separated with a particle size above 40 mum, directed them to the electrolyzer, and then the particles with a size of less than 40 microns and heat-treat them in a known manner.

Пример. В отход щие газы из электролизера (содержание фтора 31 кг/ч) подают 8 т/ ч порошкообразной окиси алюмини  с размерами частиц 100-50 мкм и около 10% частиц менее 40 мкм. Газ выдерживают с окисью алюмини  в теченне 3 с np)j ПОС. Затем в цикло нном сепараторе отдел ют фракцию (97%) окиси алюмини , котора  содержит до 90% фтора, 0,2% растворилгых в бензоле смол и 50% железа.Example. 8 t / h of powdered alumina with a particle size of 100-50 microns and about 10% of particles less than 40 microns are fed into the exhaust gases from the electrolyzer (fluorine content 31 kg / h). The gas is held with aluminum oxide for 3 np) j PIC. Then, the fraction (97%) of alumina, which contains up to 90% of fluorine, 0.2% of benzene-soluble resins and 50% of iron, is separated in the cyclone separator.

Грубую ф|раКЦ1ио направл ют в электро.тизер .The coarse frame is directed to the electrolyzer.

Тонкую очистку осуществл ют в системе рукавных фильтров.Fine cleaning is carried out in a bag filter system.

Выделенна  то)1ка  фракци  окиси алюмини  (3%), содержаща  до 10-15 /о фтора, 50% железа, и 0.8-1,6% растворимой в бензоле смолы, прокаливают в нагревательной камере при ПОО-600°С и возв ащают па очистку газов.The isolated 1k fraction of alumina (3%) containing up to 10-15 / o fluorine, 50% iron, and 0.8-1.6% benzene-soluble resin, is calcined in a heating chamber at VOO-600 ° C and returned PA gas cleaning.

Claims (1)

Формула изобретени Invention Formula Способ очистки газов, образующихс  при электролитическом производство алюмини , от фтора, металлической пыли и органических примесей путем обработки газов окисью алюмини  с последующим отделением ее известными способами и термообработкой, отличающийс  тем, что, с целью упрощени  ироцесса и снижени  потерь окиси алюмини . 3 окись алюмини  используют с размерами частиц 5-100 мкм, при содержании частиц с размером меньше 40 MIKM 3-10% « отде.т ют сначала окись алюмини  с размерами частиц 4 выше 40 мкм, направл   их в электролизер, а затем частицы С размером меньше 40 мкм и подвергают их термообработке известным способом.The method of purification of gases formed during the electrolytic production of aluminum from fluorine, metal dust and organic impurities by treating the gases with alumina and then separating it with known methods and heat treatment, characterized in that in order to simplify the process and reduce the loss of alumina. 3 Alumina is used with a particle size of 5-100 μm, with a particle size of less than 40 MIKM 3-10%, the aluminum oxide with a particle size of 4 above 40 μm is selected first, sent them to the electrolyzer, and then the particles With a size of less than 40 microns and heat-treat them in a known manner.
SU1886541A 1972-02-18 1973-02-16 Gas cleaning method SU528854A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB774572A GB1416344A (en) 1972-02-18 1972-02-18 Method of recovering fluorine from aluminium reduction cell waste gases

Publications (1)

Publication Number Publication Date
SU528854A3 true SU528854A3 (en) 1976-09-15

Family

ID=9838916

Family Applications (1)

Application Number Title Priority Date Filing Date
SU1886541A SU528854A3 (en) 1972-02-18 1973-02-16 Gas cleaning method

Country Status (9)

Country Link
JP (1) JPS4893593A (en)
CA (1) CA992725A (en)
CH (1) CH562332A5 (en)
DE (1) DE2307275B2 (en)
ES (1) ES411751A1 (en)
FR (1) FR2172366A1 (en)
GB (1) GB1416344A (en)
IT (1) IT978653B (en)
SU (1) SU528854A3 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7506339A (en) * 1974-06-06 1975-12-09 Hosokawa Micromeretics Lab Lim METHOD AND DEVICE FOR DRY REMOVAL OF AIR-CARRIED EFFLUENT IN THE ALUMINUM PREPARATION.
JPS56108532A (en) * 1980-02-04 1981-08-28 Hitachi Ltd Iodine adsorbing material and preparation thereof
NO147791C (en) * 1981-02-05 1983-06-15 Norsk Viftefabrikk As PROCEDURE FOR THE SEPARATION OF FINE DUST CONTAINING POLLUTANTS FROM ALUMINUM OXYDE USED AS ADSORBENT IN A DRY CLEANING SYSTEM
DE3235558A1 (en) * 1982-09-25 1984-03-29 Metallgesellschaft Ag, 6000 Frankfurt METHOD FOR SEPARATING POLLUTANTS FROM EXHAUST GAS
US5658544A (en) * 1990-08-03 1997-08-19 Comalco Aluminium Limited Gas-solid contacting method
CN1036506C (en) * 1993-08-21 1997-11-26 石文杰 Silica-gel removing and fluorine recovering method and apparatus
CA2173859A1 (en) * 1993-11-16 1995-05-26 Grant A. Wellwood Countercurrent gas-solid contacting
SE503678C2 (en) * 1994-11-23 1996-07-29 Flaekt Ab Methods and apparatus for separating substances from a gaseous medium by dry adsorption
NO310933B1 (en) * 1997-06-25 2001-09-17 Flaekt Ab Treatment plant
NO314023B1 (en) * 1998-09-17 2003-01-20 Flaekt Ab Method and apparatus for increasing the efficiency of dry treatment plants
FR2848875B1 (en) * 2002-12-18 2005-02-11 Pechiney Aluminium METHOD AND DEVICE FOR TREATING ELECTROLYTIC CELL EFFLUENTS FOR ALUMINUM PRODUCTION

Also Published As

Publication number Publication date
FR2172366A1 (en) 1973-09-28
CA992725A (en) 1976-07-13
DE2307275B2 (en) 1976-06-24
CH562332A5 (en) 1975-05-30
GB1416344A (en) 1975-12-03
ES411751A1 (en) 1976-04-16
DE2307275A1 (en) 1973-08-23
JPS4893593A (en) 1973-12-04
IT978653B (en) 1974-09-20

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