PL105200B1 - METHOD OF MAKING ANCIENT CALCIUM SULPHATE FROM PHOSPHOGYPSE - Google Patents
METHOD OF MAKING ANCIENT CALCIUM SULPHATE FROM PHOSPHOGYPSE Download PDFInfo
- Publication number
- PL105200B1 PL105200B1 PL18214175A PL18214175A PL105200B1 PL 105200 B1 PL105200 B1 PL 105200B1 PL 18214175 A PL18214175 A PL 18214175A PL 18214175 A PL18214175 A PL 18214175A PL 105200 B1 PL105200 B1 PL 105200B1
- Authority
- PL
- Poland
- Prior art keywords
- phosphogypsum
- calcium sulphate
- hemihydrate
- phosphogypse
- water
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 title description 11
- 235000011132 calcium sulphate Nutrition 0.000 title description 5
- 239000001175 calcium sulphate Substances 0.000 title description 3
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 6
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 4
- 239000000292 calcium oxide Substances 0.000 claims description 3
- 235000012255 calcium oxide Nutrition 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 3
- 238000005119 centrifugation Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000011505 plaster Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 210000003109 clavicle Anatomy 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- -1 phospho Chemical class 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229910001392 phosphorus oxide Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- VSAISIQCTGDGPU-UHFFFAOYSA-N tetraphosphorus hexaoxide Chemical compound O1P(O2)OP3OP1OP2O3 VSAISIQCTGDGPU-UHFFFAOYSA-N 0.000 description 1
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
Przedmiotem wynalazku jest sposób wytwarzania pól¬ wodnego siarczanu wapnia z fosfogipsu stosowanego do wytwarzania wiazacych materialów budowlanych typu gipsowego.The present invention relates to a method for the production of fields aqueous calcium sulfate from phosphogypsum used for production of binding type building materials plaster.
Klasyczne próby wytwarzania z fosfogipsu pólwodnego siarczanu wapniowego, przydatnego jako spoiwo gipsowe, nie daja pozytywnych wyników. Wystepujace w fosfo¬ gipsie zanieczyszczenia, glównie rozpuszczalny pieciotlenek fosforu, powoduja niska jakosc pólwodnego siarczanu wapniowego jako spoiwa gipsowego. Sposób wytwarzania a-pólhydratu siarczanu wapnia z fosfogipsu wedlug tech¬ nologii firmy Gebruder Giulini wymaga wstepnego usu¬ wania zanieczyszczen przez przemywanie woda oraz sto¬ sowanie procesu autoklawizowania parowego.Classical trials of preparation from semi-water phosphogypsum calcium sulphate, useful as a gypsum binder, do not give positive results. Occurring in phospho plaster debris, mainly soluble pentoxide phosphorus, cause low sulfate hemihydrate quality calcium as a gypsum binder. Manufacturing method Calcium sulphate α-hemihydrate from phosphogypsum according to the tech The Gebruder Giulini technology requires an initial removal cleaning of pollutants by washing with water and water use of the steam autoclaving process.
Niedogodnoscia opisanego sposobu sa wysokie koszty przemywania fosfogipsu, duze zuzycie wody oraz zagrozenie naturalnego srodowiska. Z tych wzgledów technologia Giulinich niezostala rozpowszechniona.The disadvantages of the described method are the high costs washing of phosphogypsum, high water consumption and hazard natural environment. For these reasons, technology Giulinich was not widespread.
Natomiast inne technologie wytwarzania pólwodnego siarczanu wapnia z fosfogipsu wymagaja niskiej zawartosci zanieczyszczen w fosfogipsie, co w praktyce jest nieosiagalne i uniemozliwia ich stosowanie na skale przemyslowa.However, other technologies for semi-aquatic production Calcium sulfate with phosphogypsum require low content impurities in the phosphogypsum, which in practice is unattainable and prevents their use on an industrial scale.
Sposób wytwarzania pólwodnego siarczanu wapnia z fosfogipsu wedlug wynalazku polega na tym, ze fosfogips korzystnie wstepnie podgrzany miesza sie z wapnem pa¬ lonym, nastepnie wprowadza stezony kwas siarkowy i pro¬ wadzi proces dehydratacji dwuhydratu siarczanu wapnio¬ wego pod cisnieniem od 0,2 do 0,6 MN/m2, w temperaturze równowagi woda (para) — woda (ciecz), w kierunku otrzymania a-pólhydratu, a uzyskany produkt odwadnia sie przez wirowanie i suszenie w temperaturze powyzej 373 °K, wzglednie przerabia w stanie wilgotnym na materialy budowlane.Method for the production of calcium sulfate hemihydrate of phosphogypsum according to the invention is that of phosphogypsum preferably it is preheated and mixed with the lime lony, then introduces concentrated sulfuric acid and propellant the process of dehydration of calcium sulfate dihydrate is significant at a pressure of 0.2 to 0.6 MN / m2, at a temperature of water (steam) - water (liquid) equilibrium towards obtaining the α-hemihydrate, and the obtained product dehydrates by centrifugation and drying at a temperature above 373 ° K, relatively processed into materials when wet construction.
Zalety sposobu wedlug wynalazku polegaja na mozliwosci zastosowania fosfogipsu o duzej wilgotnosci i duzym stopniu zanieczyszczen w postaci rozpuszczalnego piecio¬ tlenku fosforu, na wysokiej jakosci produktu z uwagi na stosowany cisnieniowy sposób dehydratacji gipsu oraz na malym zapotrzebowaniu ciepla.The advantages of the method according to the invention lie in the possibility the use of high-humidity and high phosphogypsum the degree of impurity in the form of soluble five phosphorus oxide, a high quality product due to the pressure gypsum dehydration method used, and on low heat demand.
Chemiczna neutralizaqa kwasnych zanieczyszczen zna¬ cznie upraszcza ich usuwanie, a chemiczne ogrzewanie na skutek egzotermicznosci reakcji umozliwia szybkie nagrzanie duzej masy wsadu, skrócenie czasu rekrystalizacji gipsu, a w efekcie zwiekszenie wydajnosci, przy czym ogrzewanie chemiczne jest znacznie prostsze w stosunku do klasycznego ogrzewania para lub spalinami i obniza straty ciepla. Ponadto, proponowany sposób mozna zastosowac , w procesie ciaglym, co daje dodatkowe korzysci.Chemical neutralization of acidic contaminants by cumulatively simplifies their removal, and chemical heating due to the exothermic nature of the reaction, it enables a quick reaction heating a large mass of the charge, shortening the recrystallization time plaster, and as a result, increasing the efficiency, whereby chemical heating is much simpler compared to classical steam or flue gas heating and reduces losses warm. Moreover, the proposed method can be used , in a continuous process, which offers additional benefits.
Sposób wytwarzania pólwodnego siarczanu wapnia z fosfogipsu ilustruje nizej podany przyklad.Method for the production of calcium sulfate hemihydrate from phosphogypsum is shown in the following example.
Przyklad. Do goracego autoklawu o pojemnosci dm3, zaopatrzonego w mieszadlo, wprowadza sie 3 kg fosfogipsu uprzednio nagrzanego do temperatury 363 °K i wsypuje 200 g wapna palonego. Po zamknieciu autoklawu uruchamia sie mieszadlo. Wskutek zachodzacej reakcji hydratacji wapna palonego i reakcji zobojetnienia kwasnych zanieczyszczen zawartych w fosfogipsie temperatura mie¬ szaniu szybko wzrasta i z autoklawu uchodzi goracepowietrze z para wodna. Po zamknieciu zaworu wylotowego do auto¬ klawu wprowadza sie 100 cm3 stezonego kwasu siarkowego 105 200105 200 w ten sposób, aby cisnienie w autoklawie utrzymywalo sie na poziomie 0,3 MN/m2 w ciagu 15 minut. Nastepnie wypuszcza sie pare wodna, a po wyrównaniu cisnienia z otoczeniem otwiera autoklaw i opróznia. Uzyskany pro¬ dukt, glównie w postaci pólhydratu siarczanu wapniowego, suszy sie w temperaturze 393°K.Example. For a hot autoclave with a capacity of dm3, provided with a stirrer, 3 kg are introduced phosphogypsum previously heated to a temperature of 363 K and sprinkles 200 g of quicklime. After closing the autoclave the stirrer starts up. As a result of the reaction taking place quicklime hydration and acidification reactions of impurities contained in the phosphogypsum, the temperature of the rises quickly and hot air is escaping from the autoclave with steam. After closing the exhaust valve to the car 100 cm3 of concentrated sulfuric acid is introduced into the clavicle 105 200 105 200 in such a way that the pressure in the autoclave is maintained at the level of 0.3 MN / m2 within 15 minutes. Next water vapor is released, and after the pressure is equalized with the environment, opens the autoclave and empties. The resulting pro product, mainly in the form of calcium sulphate hemihydrate, dried at 393 ° K.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL18214175A PL105200B1 (en) | 1975-07-16 | 1975-07-16 | METHOD OF MAKING ANCIENT CALCIUM SULPHATE FROM PHOSPHOGYPSE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL18214175A PL105200B1 (en) | 1975-07-16 | 1975-07-16 | METHOD OF MAKING ANCIENT CALCIUM SULPHATE FROM PHOSPHOGYPSE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL105200B1 true PL105200B1 (en) | 1979-09-29 |
Family
ID=19972991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL18214175A PL105200B1 (en) | 1975-07-16 | 1975-07-16 | METHOD OF MAKING ANCIENT CALCIUM SULPHATE FROM PHOSPHOGYPSE |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL105200B1 (en) |
-
1975
- 1975-07-16 PL PL18214175A patent/PL105200B1/en unknown
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