NL8104481A - USE OF A MIXTURE OF CALCIUM SULPHITE HEMIHYDRATE AND CALCIUM SULPHATE DIHYDRATE FOR THE PREPARATION OF CEMENT. - Google Patents
USE OF A MIXTURE OF CALCIUM SULPHITE HEMIHYDRATE AND CALCIUM SULPHATE DIHYDRATE FOR THE PREPARATION OF CEMENT. Download PDFInfo
- Publication number
- NL8104481A NL8104481A NL8104481A NL8104481A NL8104481A NL 8104481 A NL8104481 A NL 8104481A NL 8104481 A NL8104481 A NL 8104481A NL 8104481 A NL8104481 A NL 8104481A NL 8104481 A NL8104481 A NL 8104481A
- Authority
- NL
- Netherlands
- Prior art keywords
- calcium
- hemihydrate
- dihydrate
- cement
- mixture
- Prior art date
Links
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 title claims description 18
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 title claims description 17
- 235000010261 calcium sulphite Nutrition 0.000 title claims description 17
- 239000000203 mixture Substances 0.000 title claims description 12
- 239000004568 cement Substances 0.000 title claims description 9
- 238000002360 preparation method Methods 0.000 title claims description 9
- 239000004295 calcium sulphite Substances 0.000 title claims description 7
- 239000003546 flue gas Substances 0.000 claims description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- TZOQQVWLTSEPJN-UHFFFAOYSA-J dicalcium disulfite hydrate Chemical compound O.[Ca++].[Ca++].[O-]S([O-])=O.[O-]S([O-])=O TZOQQVWLTSEPJN-UHFFFAOYSA-J 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 239000002803 fossil fuel Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000002562 thickening agent Substances 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 150000004683 dihydrates Chemical class 0.000 claims 1
- 238000006477 desulfuration reaction Methods 0.000 description 6
- 230000023556 desulfurization Effects 0.000 description 6
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 239000011505 plaster Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- SJWPYUMDDKMOLP-UHFFFAOYSA-J O.O.S(=O)(=O)([O-])[O-].[Ca+2].O.[Ca+2].S(=O)(=O)([O-])[O-].O.O Chemical compound O.O.S(=O)(=O)([O-])[O-].[Ca+2].O.[Ca+2].S(=O)(=O)([O-])[O-].O.O SJWPYUMDDKMOLP-UHFFFAOYSA-J 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- -1 hemihydrate Chemical compound 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
- C04B7/42—Active ingredients added before, or during, the burning process
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
- C04B22/143—Calcium-sulfate
- C04B22/145—Gypsum from the desulfuration of flue gases
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
éP ^ > % _______ __________ . ... _____ » VO 2419 téP ^>% _______ __________. ... _____ »VO 2419 t
Titel: Toepassing van een mengsel uit calciumsulfiet-hemihydraat en calciumsulfaat-dihydraat voor de bereiding van cement.Title: Use of a mixture of calcium sulfite hemihydrate and calcium sulfate dihydrate for the preparation of cement.
44
De uitvinding heeft betrekking op de toepassing van een mengsel uit calciumsulfiet-hemihydraat en calciumsulfaat-dihydraat, dat in een samenstelling van 1-99% calciumsulfiet-hemihydraat, bij voorkeur 1-30% calciumsulfiet-hemihydraat en 1-99% calciumsulfaat-dihydraat, bij voor-5 keur 60-99% calciumsulfaat-dihydraat werd gewonnen in een rookgasont-.zwavelingsproces, waarbij het uit de verbranding van fossiele brandstoffen gevormde rookgas in een wasser met een calciumhoudende suspensie wordt behandeld en daarbij o.a. calciumsulfiet-hemihydraat ontstaat, dat door toevoeging luchtzuurstof voor een deel tot calciumsulfaat-10 dihydraat wordt geoxydeerd, een deelstroom van de aldus gevormde, o.a. calciumsulfiet-hemihydraat/calciumsulfaat-dihydraat bevattende suspensie aan de wasserkringloop onttrokken aan indikkers toegevoerd en daar verre-; gaand ontwaterd wordt, en daarna de vaste stof met een beperkte resterende hoeveelheid vocht uit de kringloop verwijderd en bij voorkeur de 15 vloeistof weer aan de wasser toegevoerd wordt, voor de bereiding van cement.The invention relates to the use of a mixture of calcium sulphite hemihydrate and calcium sulphate dihydrate, which in a composition of 1-99% calcium sulphite hemihydrate, preferably 1-30% calcium sulphite hemihydrate and 1-99% calcium sulphate dihydrate, Preferably 60-99% calcium sulfate dihydrate was recovered in a flue gas desulphurisation process, in which the flue gas formed from the combustion of fossil fuels is treated in a scrubber with a calcium-containing slurry, thereby producing, inter alia, calcium sulfite hemihydrate, which is addition of air oxygen is partly oxidized to calcium sulphate-dihydrate, a partial stream of the suspension thus formed, including calcium sulphite-hemihydrate / calcium sulphate-dihydrate, to the scrubber cycle, fed from thickeners and fed there; is dewatered, then the solid is removed with a limited residual amount of moisture from the cycle, and preferably the liquid is returned to the scrubber for the preparation of cement.
Bij de bereiding van cement wordt gips als middel voor het vertragen van de verstarring toegevoegd. Deze toevoeging werd tot op heden in de vorm van natuurgips of natuur anhydriet bij gemalen aan de cement-20 klinker.In the preparation of cement, gypsum is added as a means of delaying the solidification. This addition has hitherto been ground in the form of natural gypsum or natural anhydrite on the cement-20 clinker.
Bij de behandeling van rookgassen, die bij de verbranding van fossiele brandstoffen ontstaan, dienen met het oog op de verscherping van de bepalingen voor het zuiver houden van de lucht maatregelen te worden getroffen die het zwavelgehalte van dergelijke rookgassen ver-25 lagen. De ontzwaveling van de rookgassen kan op bekende wijze in het kader van een natte-rookgasontzwaveling geschieden. Afhankelijk van de procesvoering van de natte-rookgasontzwaveling wordt een mengsel uit calciumsulfiet-hemihydraat en calciumsulfaat-dihydraat gewonnen, waarbij het calciumsulfiet-hemihydraat-gehalte in bepaalde gewichtshoeveel-30 heden met betrekking tot het totale vastestofgehalte kan worden geregeld.In the treatment of flue gases resulting from the combustion of fossil fuels, measures which reduce the sulfur content of such flue gases should be taken to tighten up the air purification provisions. The desulphurisation of the flue gases can take place in a known manner in the context of wet flue gas desulphurisation. Depending on the process of the wet flue gas desulfurization, a mixture of calcium sulfite hemihydrate and calcium sulfate dihydrate is recovered, the calcium sulfite hemihydrate content being controllable in certain amounts by weight with respect to the total solids content.
Voor de bereiding van bouwgipsen kunnen slechts produkten worden gebruikt, waarvan het calciumsulfiet-hemihydraatgehalte wezenlijk beneden 1% ligt. Om een produkt van deze soort uit de natte-rookgasontzwaveling te verkrijgen, is een bijzondere procesvoering met een bijbehorende 35 apparatuurinvestering vereist. Er wordt niet steeds naar gestreefd om uit 8104481Only products of which the calcium sulphite-hemihydrate content is substantially below 1% can be used for the production of construction plaster. In order to obtain a product of this kind from the wet-flue gas desulfurization, a special process with an associated equipment investment is required. The aim is not always to get out of 8104481
__,. "jC__ ,. "jC
-2- de natte-rookgasontzwaveling een produkt met hoog sulfaatgehalte te verkrijgen, maar een produkt dat naar andere toepassingsdoeleinden kan worden gevoerd.-2- wet flue gas desulfurization to obtain a product with a high sulfate content, but a product that can be used for other applications.
Zoals bij proeven is gebleken, kan het ealciumsulfiet-hemihydraat, 5 het calciumsulfaat-dihydraat, -hemihydraat, -anhydriet in zijn functie als middel voor het regelen van de' verstarring bij de cementbereiding vervangen.As has been shown in experiments, the calcium sulfite hemihydrate, calcium replaces the calcium sulfate dihydrate, hemihydrate, anhydrite in its function as a means of controlling the solidification in the cement preparation.
Doel van de. uitvinding is . derhalve om in plaats van het tot op heden toegepaste natuurgips of natuuranhydriet een mengsel uit calcium-10 sulfiet-hemihydraat en calciumsulfaat-dihydraat als middel voor het regelen van de verstarring bij de cementbereiding toe te passen.Purpose of the. invention. therefore to use a mixture of calcium sulfite hemihydrate and calcium sulfate dihydrate as a means of controlling the solidification in the cement preparation instead of the natural plaster or natural anhydrite used to date.
Dit doel wordt volgens de uitvinding gerealiseerd door de toepassing van een mengsel uit ealciumsulfiet-hemihydraat en calciumsulfaat-dihydraat in een samenstellling van 1-99% ealciumsulfiet-hemihydraat, 15 bij voorkeur 1-30% ealciumsulfiet-hemihydraat, en 1-99% calciumsulfaat-dihydraat, bij voorkeur 60-99% calciumsulfaat-dihydraat.This object is achieved according to the invention by using a mixture of calcium sulfite hemihydrate and calcium sulfate dihydrate in a composition of 1-99% calcium sulfite hemihydrate, preferably 1-30% calcium sulfite hemihydrate, and 1-99% calcium sulfate dihydrate, preferably 60-99% calcium sulfate dihydrate.
De voordelen die met de uitvinding worden bereikt, bestaan hierin, dat een bij de natte-rookgasontzwaveling gevormd produkt tegen gunstige kosten bij de cementbereiding kan worden toegepast. Doordat 20 het natte-rookgasontzwavelingsprocédé in zijn procesvoering kan worden gericht op het winnen van ealciumsulfiet-hemihydraat/calciumsulfaat-dihydraatmengsel en ook daardoor de.apparatuurinvesteringen worden verminderd, wordt de rookgasontzwaveling aanzienlijk gunstiger wat kosten betreft. Ook is door het gebruik van een dergelijk produkt als toevoe-25 ging (middel voor hèt regelen .van de verstarring) bij de cementbereiding een milieuvervuilende, afzetting niet vereist, waarbij in het bijzonder te vermelden is dat milieuvervuilende zouten in het ealciumsulfiet-hemihydraat/ calciumsulfaat-dihydraatmengsel gedeeltelijk achterblijven, terwijl bij andere werkwijzen deze zouten via afwater of afzetting moet 30 worden afgevoerd. Bovendien wordt door de toepassing van dit gedwongen afvalprodukt de afbraak van het in de natuur voorkomende ruwe gips verminderd.The advantages achieved with the invention consist in the fact that a product formed in the wet-flue gas desulfurization can be used at a favorable cost in the cement preparation. Since the wet flue gas desulfurization process can be directed in its process operation to recover calcium sulfite-hemihydrate / calcium sulfate dihydrate mixture and thereby also reduce equipment investments, flue gas desulfurization becomes considerably more favorable in cost. Also, the use of such a product as an additive (means for controlling the solidification) in cement preparation does not require an environmentally polluting deposit, particularly mentioning that environmentally polluting salts in the calcium sulfite hemihydrate calcium sulfate-dihydrate mixture is partially left behind, while in other processes these salts have to be drained through drainage or deposition. Moreover, the use of this forced waste product reduces the degradation of the naturally occurring raw gypsum.
81044818104481
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803037056 DE3037056A1 (en) | 1980-10-01 | 1980-10-01 | USE OF A MIXTURE OF CALCIUM SULFIT SEMI-HYDRATE AND CALCIUM SULFATE DIHYDRATE FOR THE PRODUCTION OF CEMENT |
| DE3037056 | 1980-10-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL8104481A true NL8104481A (en) | 1982-05-03 |
Family
ID=6113333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL8104481A NL8104481A (en) | 1980-10-01 | 1981-10-01 | USE OF A MIXTURE OF CALCIUM SULPHITE HEMIHYDRATE AND CALCIUM SULPHATE DIHYDRATE FOR THE PREPARATION OF CEMENT. |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPS5788053A (en) |
| BE (1) | BE890558A (en) |
| DD (1) | DD201667A5 (en) |
| DE (1) | DE3037056A1 (en) |
| DK (1) | DK431681A (en) |
| FR (1) | FR2491054A1 (en) |
| GB (1) | GB2084562B (en) |
| GR (1) | GR75013B (en) |
| IE (1) | IE51795B1 (en) |
| IT (1) | IT1138682B (en) |
| LU (1) | LU83658A1 (en) |
| NL (1) | NL8104481A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59195560A (en) * | 1983-04-21 | 1984-11-06 | 日本セメント株式会社 | Manufacture of concrete products |
| DE3821657A1 (en) * | 1988-06-27 | 1989-12-28 | Rheine Kalkwerke Gmbh | METHOD FOR PRODUCING A BINDER AND ITS USE |
| DE59005950D1 (en) * | 1989-11-20 | 1994-07-07 | Wsz Wolfener Schwefelsaeure Un | METHOD FOR PRODUCING CEMENT CLINKER AND RECOVERY OF SULFUR DIOXIDE. |
| JP4775045B2 (en) * | 2006-03-14 | 2011-09-21 | 宇部興産株式会社 | Reducing gypsum composition, method for producing the same, cement-based solidifying material, and solidifying method |
| JP7406994B2 (en) * | 2020-01-08 | 2023-12-28 | Ｕｂｅ三菱セメント株式会社 | Method for manufacturing cement composition |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3855391A (en) * | 1973-01-23 | 1974-12-17 | Dravo Corp | Sludge stabilization with gypsum |
| SU563376A1 (en) * | 1975-03-10 | 1977-06-30 | Харьковский Ордена Ленина Политехнический Институт Им. В.И.Ленина | Expanding binding material |
-
1980
- 1980-10-01 DE DE19803037056 patent/DE3037056A1/en not_active Ceased
-
1981
- 1981-09-29 DK DK431681A patent/DK431681A/en not_active Application Discontinuation
- 1981-09-29 GB GB8129302A patent/GB2084562B/en not_active Expired
- 1981-09-30 FR FR8118455A patent/FR2491054A1/en not_active Withdrawn
- 1981-09-30 LU LU83658A patent/LU83658A1/en unknown
- 1981-09-30 GR GR66169A patent/GR75013B/el unknown
- 1981-09-30 BE BE0/206114A patent/BE890558A/en not_active IP Right Cessation
- 1981-10-01 IE IE2280/81A patent/IE51795B1/en unknown
- 1981-10-01 DD DD81233790A patent/DD201667A5/en unknown
- 1981-10-01 NL NL8104481A patent/NL8104481A/en not_active Application Discontinuation
- 1981-10-01 JP JP56154891A patent/JPS5788053A/en active Pending
- 1981-10-01 IT IT24262/81A patent/IT1138682B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| LU83658A1 (en) | 1982-02-17 |
| IT8124262A0 (en) | 1981-10-01 |
| GB2084562A (en) | 1982-04-15 |
| DE3037056A1 (en) | 1982-04-22 |
| GR75013B (en) | 1984-07-12 |
| BE890558A (en) | 1982-01-18 |
| IE51795B1 (en) | 1987-04-01 |
| IT1138682B (en) | 1986-09-17 |
| FR2491054A1 (en) | 1982-04-02 |
| JPS5788053A (en) | 1982-06-01 |
| IE812280L (en) | 1982-04-01 |
| DD201667A5 (en) | 1983-08-03 |
| DK431681A (en) | 1982-04-02 |
| GB2084562B (en) | 1984-03-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A85 | Still pending on 85-01-01 | ||
| BV | The patent application has lapsed |