FR2491054A1 - PROCESS FOR USING A MIXTURE OF CALCIUM SULPHITE HALF HYDRATE AND CALCIUM SULFATE DI HYDRATE IN THE MANUFACTURE OF CEMENT - Google Patents
PROCESS FOR USING A MIXTURE OF CALCIUM SULPHITE HALF HYDRATE AND CALCIUM SULFATE DI HYDRATE IN THE MANUFACTURE OF CEMENT Download PDFInfo
- Publication number
- FR2491054A1 FR2491054A1 FR8118455A FR8118455A FR2491054A1 FR 2491054 A1 FR2491054 A1 FR 2491054A1 FR 8118455 A FR8118455 A FR 8118455A FR 8118455 A FR8118455 A FR 8118455A FR 2491054 A1 FR2491054 A1 FR 2491054A1
- Authority
- FR
- France
- Prior art keywords
- calcium
- hydrate
- cement
- mixture
- manufacture
- 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.)
- Withdrawn
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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)
Abstract
L'INVENTION CONCERNE UN PROCEDE D'UTILISATION, COMME REGULATEUR DE SOLIDIFICATION DANS LA FABRICATION DU CIMENT, UN MELANGE DE DEMI-HYDRATE DE SULFITE DE CALCIUM (EN PROPORTION DE 1 A 99 ET DE PREFERENCE DE 1 A 30), ET DE DI-HYDRATE DE SULFATE DE CALCIUM (EN PROPORTION DE 1 A 99 ET DE PREFERENCE DE 60 A 99) OBTENU DANS LA DESULFURATION DES GAZ DE FUMEE. LE PROCEDE ABAISSE LE COUT DE LA FABRICATION DU CIMENT ET REDUIT LA FORMATION DE PRODUITS NOCIFS POUR L'ENVIRONNEMENT.THE INVENTION RELATES TO A PROCESS FOR USING, AS A SOLIDIFICATION REGULATOR IN THE MANUFACTURING OF CEMENT, A MIXTURE OF HALF-HYDRATE OF CALCIUM SULPHITE (IN PROPORTION FROM 1 TO 99 AND PREFERABLY FROM 1 TO 30), AND OF DI- CALCIUM SULPHATE HYDRATE (IN PROPORTION FROM 1 TO 99 AND PREFERABLY FROM 60 TO 99) OBTAINED IN THE DESULFURATION OF FUME GASES. THE PROCESS REDUCES THE COST OF CEMENT MANUFACTURING AND REDUCES THE FORMATION OF HARMFUL PRODUCTS FOR THE ENVIRONMENT.
Description
249 1054249 1054
La présente invention concerne l'emploi, dans la fa- The present invention relates to the use, in the fa-
brication du ciment, d'un mélange de demi-hydrate de sulfite de calcium et de di-hydrate de sulfate de brication of cement, a mixture of calcium sulphite half hydrate and sodium sulphate di hydrate
calcium obtenu, en proportion de 1 à 99 % (et de pré- calcium obtained, in proportion from 1 to 99% (and pre-
férence de 1 à 30 %) de demi-hydrate de sulfite de calcium et de 1 à 99 % (et de préférence de 60 à 99 %) de di-hydrate de sulfate de calcium, dans un procédé de désulfuration de gaz de fumée dans lequel le gaz de fumée, produit par la combustion de combustibles fossiles, est traité, avec une suspension contenant du calcium, dans un appareil laveur o se formera, entre autres, du demi-hydrate de sulfite de calcium qui sera partiellement oxydé par addition d'oxygène ference of 1 to 30%) of calcium sulphite half hydrate and of 1 to 99% (and preferably 60 to 99%) of calcium sulphate di-hydrate, in a process for desulfurization of flue gas in which the smoke gas, produced by the combustion of fossil fuels, is treated, with a suspension containing calcium, in a washing machine where will form, inter alia, half-hydrate of calcium sulfite which will be partially oxidized by addition of 'oxygen
de l'air pour donner du di-hydrate de sulfate de cal- air to give cal sulphate di-hydrate
cium, un courant partiel de la suspension ainsi formée, contenant, entre autres, du di-hydrate de sulfate de calcium, étant retiré du circuit de l'appareil laveur cium, a partial stream of the suspension thus formed, containing, inter alia, calcium sulphate di-hydrate, being withdrawn from the circuit of the washing apparatus
et amené à des épaississeurs.o il sera considérable- and brought to thickeners. o it will be considerable-
ment déshydraté, la matière solide, d'humidité rési- dehydrated, solid matter, moisture resis-
duelle réduite, étant ensuite extraite du circuit et la matière liquide étant, de préférence, ramenée à l'appareil laveur Dans la fabrication du ciment, on ajoute du gypse à titre de retardateur de solidification. Jusqu'à ce reduced dual, then being extracted from the circuit and the liquid material preferably being brought back to the washing machine In the manufacture of cement, gypsum is added as a solidification retarder. Until
jour, ce produit d'addition était mélangé, par broy- day, this adduct was mixed by grinding
age, au clinker de ciment sous forme de gypse naturel ou d'anhydrite naturel Dans le traitement des gaz de fumée produits par la combustion de combustibles fossiles on doit, en raison age, with cement clinker in the form of natural gypsum or natural anhydrite In the treatment of flue gases produced by the combustion of fossil fuels one must, due
du durcissement des prescriptions relatives à la pol- the tightening of regulations relating to pol-
lution de l'air, prendre des dispositions pour abais- air lution, arrange to lower
2 4 9 1 0 5 42 4 9 1 0 5 4
ser la teneur en soufre de ces gaz de fumée. La désul- ser the sulfur content of these smoke gases. The desul-
furation des gaz de fumée peut s'effectuer, de façon flue gas cleaning can be carried out
connue, dans le cadre d'une désulfuration par voie hu- known, in the context of a desulphurization by the
mide des gaz de fumée Selon le déroulement du pro- smoke flue gas Depending on the progress of the pro-
cessus de désulfuration par voie humide des gaz de cessation of wet desulfurization of
fumée, on obtient un mélange de demi-hydrate de sul- smoke, a mixture of sulphide half hydrate is obtained
fite de calcium et de di-hydrate de sulfate de cal- calcium and calcium sulphate di-hydrate
cium, la teneur en demi-hydrate de sulfite de calcium pouvant être réglée à des parties en poids déterminées cium, the content of calcium sulfite half hydrate can be adjusted to specific parts by weight
par rapport à la teneur totale en matières solides. based on the total solids content.
Pour la fabrication du plâtre de construction, on ne For the production of construction plaster,
peut employer que des produits dont la teneur en demi- can only use products with half
hydrate de sulfite de calcium est nettement inférieure à 1 %. Pour obtenir un tel produit à partir d'une désulfuration par voie humide de gaz de fumée, il est calcium sulfite hydrate is significantly less than 1%. To obtain such a product from a wet desulphurization of flue gases, it is
indispensable d'employer un procédé particulier utili- essential to use a particular process
sant un appareillage conformément compliqué. On ne cherche pas toujours à obtenir de la désulfuration par voie humide des gaz de fumée un produit à forte teneur en sulfate mais un produit approprié à d'autres usages sant compliant equipment. It is not always sought to obtain from the desulfurization by wet process of the smoke gases a product with a high sulphate content but a product suitable for other uses.
Comme des essais l'ont révélé, le demi-hydrate de sul- As tests have revealed, sulphide half hydrate
fite de calcium peut remplacer le di-hydrate, le demi- calcium can replace the di-hydrate, the half
hydrate,- ou l'anhydrite de sulfate de calcium dans les fonctions de régulateur de solidification dans la hydrate, - or calcium sulfate anhydrite in the solidification regulator functions in the
fabrication du ciment.cement manufacturing.
La présente invention a donc pour objet d'utiliser, comme régulateur de solidification dans la fabrication du ciment, un mélange de demi-hydrate de sulfite de calcium et de di-hydrate de sulfate de calcium au lieu du gypse naturel ou de l'anhydrite naturel, utilisés jusqu'ici. Pour atteindre cebut, la présente invention propose d'utiliser un mélange de demi-hydrate de sulfite de calcium et de di-hydrate de sulfate de calcium en composition de 1 à 99 % (et de préférence de 1 à 30 A) de demi-hydrate de sulfite de calcium, et de 1 à 99 % (et de préférence de 60 à 99 %) de di-hydrate de The object of the present invention is therefore to use, as a solidification regulator in the manufacture of cement, a mixture of calcium sulfite half hydrate and calcium sulfate di hydrate instead of natural gypsum or anhydrite natural, used so far. To achieve this goal, the present invention proposes to use a mixture of calcium sulfite half hydrate and calcium sulfate di hydrate in composition from 1 to 99% (and preferably from 1 to 30 A) of half hydrate of calcium sulfite, and from 1 to 99% (and preferably from 60 to 99%) of dihydrate of
sulfate de calcium.calcium sulfate.
L'avantage procuré par l'invention réside dans la pos- The advantage provided by the invention lies in the pos-
sibilité d'utiliser, dans des conditions économique- sibility to use, under economic conditions-
ment favorables, pour la production du ciment, un pro- favorable for the production of cement, a pro-
duit se formant au cours de la désulfuration par voie humide des gaz de fumée. Le coft de la désulfuration product formed during the wet desulphurization of the flue gases. The cost of desulfurization
par voie humide des gaz de fumée se trouve sensible- wet smoke gas is sensitive-
ment abaissé par le fait que la marche du processus de désulfuration par voie humide des-gaz de fumée peut *tre axée sur l'obtention d'un mélange de demi-hydrate de sulfite de calcium et de di-hydrate de sulfate de lowered by the fact that the process of the wet desulphurization process of the flue gases can be focused on obtaining a mixture of calcium sulphite half hydrate and sodium sulphate dihydrate
calcium ainsi que par la simplification de l'appareil- calcium as well as by simplifying the device-
lage. L'emploi d'un tel produit comme produit d'addi- age. The use of such a product as an additive
tion (régulateur de solidification) dans la fabrica- tion (solidification regulator) in the manufacturing
tion du ciment n'entratne pas la formation d'un dépôt tion of the cement does not cause the formation of a deposit
polluant l'environnement, car on doit tout particu- polluting the environment, because we must all
lièrement souligner que les sels nocifs pour l'envi- point out that the harmful salts for the environment
ronnement restent en partie dans le mélange de demi- part of it remains in the mixture of half
hydrate de sulfite de calcium et de di-hydrate de sulfate de calcium, tandis qu'avec d'autres procédés calcium sulphite hydrate and calcium sulphate di-hydrate, while with other processes
ces sels doivent être évacués, soit par les eaux d'é- these salts must be evacuated either by waste water
vacuation, soit par la formation de dép8ts. En outre, vacuation, either by the formation of dep8ts. In addition,
l'emploi de ces déchets inévitables diminue l'épuise- the use of this inevitable waste decreases the exhaustion
ment des gisements de gypse naturel brut. of raw natural gypsum deposits.
249 1054249 1054
Claims (1)
Applications Claiming Priority (1)
| 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 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2491054A1 true FR2491054A1 (en) | 1982-04-02 |
Family
ID=6113333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8118455A Withdrawn FR2491054A1 (en) | 1980-10-01 | 1981-09-30 | PROCESS FOR USING A MIXTURE OF CALCIUM SULPHITE HALF HYDRATE AND CALCIUM SULFATE DI HYDRATE IN THE MANUFACTURE 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 |
| WO1991007360A1 (en) * | 1989-11-20 | 1991-05-30 | Chemie Ag Bitterfeld-Wolfen | Process for the production of cement clinker and sulphur dioxide recovery |
| 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 |
Citations (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 BE BE0/206114A patent/BE890558A/en not_active IP Right Cessation
- 1981-09-30 FR FR8118455A patent/FR2491054A1/en not_active Withdrawn
- 1981-09-30 GR GR66169A patent/GR75013B/el unknown
- 1981-09-30 LU LU83658A patent/LU83658A1/en unknown
- 1981-10-01 IE IE2280/81A patent/IE51795B1/en unknown
- 1981-10-01 NL NL8104481A patent/NL8104481A/en not_active Application Discontinuation
- 1981-10-01 DD DD81233790A patent/DD201667A5/en unknown
- 1981-10-01 JP JP56154891A patent/JPS5788053A/en active Pending
- 1981-10-01 IT IT24262/81A patent/IT1138682B/en active
Patent Citations (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 |
Non-Patent Citations (1)
| Title |
|---|
| CHEMICAL ABSTRACT, vol.87, no.14, 3 octobre 1977, page 225, résumé no. 105934g, Columbus Ohio (US) & SU - A - 563 376 (KHARKOV POLYTECHNIC INSTITUTE) (30 juin 1977) * |
Also Published As
| Publication number | Publication date |
|---|---|
| DK431681A (en) | 1982-04-02 |
| DE3037056A1 (en) | 1982-04-22 |
| IE812280L (en) | 1982-04-01 |
| IT1138682B (en) | 1986-09-17 |
| NL8104481A (en) | 1982-05-03 |
| IE51795B1 (en) | 1987-04-01 |
| LU83658A1 (en) | 1982-02-17 |
| GB2084562B (en) | 1984-03-07 |
| JPS5788053A (en) | 1982-06-01 |
| DD201667A5 (en) | 1983-08-03 |
| IT8124262A0 (en) | 1981-10-01 |
| BE890558A (en) | 1982-01-18 |
| GR75013B (en) | 1984-07-12 |
| GB2084562A (en) | 1982-04-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |