SU58341A1 - Calcium compounds regeneration method - Google Patents
Calcium compounds regeneration methodInfo
- Publication number
- SU58341A1 SU58341A1 SU17116A SU30238A SU58341A1 SU 58341 A1 SU58341 A1 SU 58341A1 SU 17116 A SU17116 A SU 17116A SU 30238 A SU30238 A SU 30238A SU 58341 A1 SU58341 A1 SU 58341A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- nepheline
- calcium
- limestone
- calcium compounds
- regeneration method
- Prior art date
Links
- 229940043430 calcium compound Drugs 0.000 title claims description 3
- 150000001674 calcium compounds Chemical class 0.000 title claims description 3
- 238000011069 regeneration method Methods 0.000 title description 2
- 238000000034 method Methods 0.000 claims description 16
- 239000010434 nepheline Substances 0.000 claims description 15
- 229910052664 nepheline Inorganic materials 0.000 claims description 15
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 8
- 239000010802 sludge Substances 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 claims description 6
- 235000010261 calcium sulphite Nutrition 0.000 claims description 6
- 235000019738 Limestone Nutrition 0.000 claims description 5
- LVGQIQHJMRUCRM-UHFFFAOYSA-L calcium bisulfite Chemical compound [Ca+2].OS([O-])=O.OS([O-])=O LVGQIQHJMRUCRM-UHFFFAOYSA-L 0.000 claims description 5
- 235000010260 calcium hydrogen sulphite Nutrition 0.000 claims description 5
- 239000006028 limestone Substances 0.000 claims description 5
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- 239000007900 aqueous suspension Substances 0.000 claims description 2
- 239000006229 carbon black Substances 0.000 claims description 2
- 230000001172 regenerating effect Effects 0.000 claims description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims 1
- 235000011941 Tilia x europaea Nutrition 0.000 claims 1
- 239000004571 lime Substances 0.000 claims 1
- 239000002002 slurry Substances 0.000 claims 1
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229940072033 potash Drugs 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 235000015320 potassium carbonate Nutrition 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 235000010205 Cola acuminata Nutrition 0.000 description 1
- 244000228088 Cola acuminata Species 0.000 description 1
- 235000015438 Cola nitida Nutrition 0.000 description 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
- 150000008041 alkali metal carbonates Chemical class 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
Изобретение касаетс способа регенерации кальциевых соединений из шламмов, получаемых при переработке нефелина на глинозем и щелочи . Така регенераци имеет значение при производст1ве глинозема из нефелина в услови х недостатка известн ков , например, на Кольском полуострове.The invention relates to a method for regenerating calcium compounds from sludge obtained from the processing of nepheline into alumina and alkali. Such regeneration is important when producing alumina from nepheline in conditions of a lack of limestone, for example, on the Kola Peninsula.
Предлагаемый, согласно насто щему изобретению, способ заключаетс в следующем.The method according to the present invention is as follows.
Нефелиновый шламм в водной суспензии на холоду подвергаетс воздействию газов, содержащих SOs, при этом наход щиес в щламме силикаты кальци разлагаютс с образованием сульфита кальци , переход щего в раствор, при избытке SO,, в виде бисульфита кальци . В остатке наход тс кремнезем и некоторые примеси щламма.Nepheline sludge in an aqueous suspension is exposed to cold under the influence of gases containing SOs, while the calcium silicates in the sludge decompose to form calcium sulfite, which goes into solution, with an excess of SO, in the form of calcium bisulfite. Silica and some impurities of schlamm are in the residue.
Реакци происходит по уравнению:The reaction takes place according to the equation:
2СаО SiO, 4- 4SO2 + 2НгО - - 2Са(43Оз)2 + 25Ю2.2CaO SiO, 4-4SO2 + 2НгО - - 2Са (43Оз) 2 + 25Ю2.
Раствор бисульфита кальци отдел етс от кремнеземистого остатка фильтрацией и подвергаетс нагреванию , при котором выдел етс SOaThe calcium bisulfite solution is separated from the silica residue by filtration and subjected to heat, at which SOa is released.
и в осадок выпадает сульфит кальци . Жидкость, отфильтрованна от осадка сульфита кальци , идет на смещение с новой порцией нефелинового щламма дл его разложени SOa содержащим газом. Полученный сульфит кальци после подсушки примен етс , взамен известн ка, дл спекани с нефелиновым концентратом; щихта составл етс в мол рСаО о 1 ном отнощении -ь, 2,1, как этоand calcium sulfite precipitates. The liquid filtered from the calcium sulfite precipitate is displaced with a new batch of nepheline sludge to decompose it with SOa-containing gas. The obtained calcium sulfite, after drying, is used, instead of limestone, for sintering with nepheline concentrate; The contents are molar pCaO of 1 ratio, 2.1, as
прин то дл известково-нефелинового процесса, и подвергаетс нагреванию до 1250-1300°. При термическом процессе выдел етс SO, (за счет вытеснени его из сульфита кальци составными част ми нефелина ) и образуетс йзвестково-нефелиновый спек, перерабатываемый известными приемами на глинозем, соду и поташ. Сернистый газ, выдел ющийс из печей спекани , а также при указанном выще нагревании раствора бисульфита кальци , возвращаетс на разложение новой порции нефелинового шламма. Потери SO., в процессе восполн ютс , например, отход щими газами смежных производств , содержащими SO.,.accepted for the lime-nepheline process, and heated to 1250-1300 °. During the thermal process, SO is released, (due to its displacement from calcium sulfite by the constituent parts of nepheline) and formed as a gold-nepheline spec, processed by known techniques for alumina, soda and potash. The sulfur dioxide released from the sintering furnaces, as well as at the above mentioned heating of the calcium bisulfite solution, returns to decomposition of the new portion of nepheline sludge. The losses of SO. In the process are compensated for, for example, by flue gases from related industries containing SO.,.
Кремнеземистый шламм, получаемый при разложении нефелинового шламма сернистым газом, будучи отделен от раствора бисульфита кальци , вл етс превосходным материалом дл получени известным способом белой сажи, например, при помощи обработки его растворами карбонатов щелочных металлов, получаемых в производстве глинозема из нефелина, и последующего разложени полученных при этой обработке профильтрованных растворов силикатов щелочных металлов карбонизацией .Siliceous sludge, obtained by decomposing nepheline sludge with sulfur dioxide, when separated from calcium bisulfite solution, is an excellent material for producing white carbon black by a known method, for example, by treating it with alkali metal carbonate solutions obtained in the production of alumina from nepheline, and subsequent decomposition obtained by this treatment of filtered solutions of alkali metal silicates by carbonization.
В результате всего процесса мы имеем следующие продукты: глинозем , соду, поташ и белую сажу, т. е. полное использование нефелина при затрате в качестве реагентов: 1) отбросных газов, содержащих SOa, причем последний вл етс оборотным реагентом и 2) некоторого небольшого количества известн ка на восполнение потерь кальци в процессе.As a result of the whole process, we have the following products: alumina, soda, potash and white soot, i.e. full use of nepheline when used as reagents: 1) waste gases containing SOa, the latter being a working reagent and 2) some small amounts of limestone to compensate for calcium losses in the process.
Способ имеет то преимущество, что SO2, выдел ющийс в термическом процессе разложени сульфитнонефелиновой шихты, вл етс оборотным реагентом и не требует переработки его в серную кислоту, как это имеет место в известных аналогичных процессах.The method has the advantage that the SO2 released in the thermal decomposition process of the sulfite-nepheline charge is a working reagent and does not require its processing into sulfuric acid, as is the case in known similar processes.
Предмет изобретени .The subject matter of the invention.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU17116A SU58341A1 (en) | 1940-02-27 | 1940-02-27 | Calcium compounds regeneration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU17116A SU58341A1 (en) | 1940-02-27 | 1940-02-27 | Calcium compounds regeneration method |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU107137A Addition SU31910A1 (en) | 1932-04-10 | 1932-04-10 | Bar for chain cutting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU58341A1 true SU58341A1 (en) | 1940-11-30 |
Family
ID=48240687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU17116A SU58341A1 (en) | 1940-02-27 | 1940-02-27 | Calcium compounds regeneration method |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU58341A1 (en) |
-
1940
- 1940-02-27 SU SU17116A patent/SU58341A1/en active
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