CZ286987B6 - Process for preparing expansion component of aluminous cements based on compound 3CaO.3Ali2Oi3.CaSOi4 from ammonia alum - Google Patents
Process for preparing expansion component of aluminous cements based on compound 3CaO.3Ali2Oi3.CaSOi4 from ammonia alum Download PDFInfo
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- CZ286987B6 CZ286987B6 CZ1997975A CZ97597A CZ286987B6 CZ 286987 B6 CZ286987 B6 CZ 286987B6 CZ 1997975 A CZ1997975 A CZ 1997975A CZ 97597 A CZ97597 A CZ 97597A CZ 286987 B6 CZ286987 B6 CZ 286987B6
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- CZ
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- Prior art keywords
- ground
- alum
- 3cao
- expansion component
- casoi4
- Prior art date
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- 239000004568 cement Substances 0.000 title claims abstract description 11
- 150000001875 compounds Chemical class 0.000 title abstract description 9
- 238000004519 manufacturing process Methods 0.000 title abstract description 3
- WZUKKIPWIPZMAS-UHFFFAOYSA-K Ammonium alum Chemical compound [NH4+].O.O.O.O.O.O.O.O.O.O.O.O.[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O WZUKKIPWIPZMAS-UHFFFAOYSA-K 0.000 title abstract 3
- 239000000292 calcium oxide Substances 0.000 claims abstract description 9
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 7
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical class [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract 3
- 229940037003 alum Drugs 0.000 claims description 7
- 235000011124 aluminium ammonium sulphate Nutrition 0.000 claims description 5
- LCQXXBOSCBRNNT-UHFFFAOYSA-K ammonium aluminium sulfate Chemical compound [NH4+].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O LCQXXBOSCBRNNT-UHFFFAOYSA-K 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000005469 granulation Methods 0.000 claims 1
- 230000003179 granulation Effects 0.000 claims 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract 1
- 229910052925 anhydrite Inorganic materials 0.000 description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 3
- 229910052770 Uranium Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 238000012958 reprocessing Methods 0.000 description 2
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011405 expansive cement Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- -1 uranium Chemical class 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
Způsob přípravy expanzní složky rozpínavých cementů na bázi sloučeniny 3CaO.3Al2O3.CaSO4 z kamence hlinitoamonnéhoProcess for the preparation of the expansion component of expandable cements based on the compound 3CaO.3Al 2 O 3 .CaSO4 from ammonium alum
Oblast technikyTechnical field
Vynález se týká způsobu přepracování kamence hlinitoamonného NH4A1(SO4)2.12H2O na expanzní složku rozpínavých cementů, obsahující zejména sloučeninu 3CaO.3Al2O3.CaSO4.This invention relates to the reprocessing of alum hlinitoamonného NH4A1 (SO 4) 2 .12H2O folder for expansion of the expanding cement, comprising in particular a compound 3CaO.3Al 2 O 3 .CaSO fourth
Dosavadní stav technikyBACKGROUND OF THE INVENTION
Dosavadní způsoby přípravy sloučeniny 3CaO.3Al2O3.CaSO4, využitelné jako expanzní složka rozpínavých cementů, vycházejí převážně z tepelného zpracování směsi hlinitých sloučenin na bázi oxidu hlinitého, vápence a/nebo sádrovce. Využití kamence hlinitoamonného pro výrobu této sloučeniny nebylo dosud realizováno ani zvažováno s ohledem na nedostatečný zdroj kamence hlinitoamonného.Existing methods for preparing compounds 3CaO.3Al 2 O 3 .CaSO 4 usable as an expansion element expanding cements are based primarily on the heat treatment of the mixture of aluminum compounds on alumina, limestone and / or gypsum. The use of ammonium alum for the production of this compound has not been realized or considered due to the insufficient source of ammonium alum.
Podstata vynálezuSUMMARY OF THE INVENTION
Sloučeninu 3CaO.3Al2O3.CaSC>4 lze získat přepracováním kamence hlinitoamonného postupem podle vynálezu tak, že se kamenec hlinitoamonný smísí s uhličitanem a/nebo oxidem vápenatým vmolámím poměru CaO:Al2O3 rovném 3:3 až 5:3, optimálně 4:3. Vzniklá surovinová směs se semele, zhomogenizuje, případně podrobí granulaci a potom se tepelně zpracuje v rotační peci při teplotách v rozmezí od 1150°C do 1350 °C. Při tepelném zpracování vzniká reakcemi v pevné fázi převážně sloučenina 3CaO.3Al2O3.CaSO4, s jistým podílem CaSO4, případně s menším obsahem CaO. Výsledný produkt, tj. expanzní složka rozpínavých cementů, se získá semletím tepelně zpracované směsi na měrný povrch vyšší než 300 m2/kg.Compound 3CaO.3Al 2 O 3 .CaSC> 4 can be obtained by reprocessing hlinitoamonného alum according to the invention so that the alum hlinitoamonný mixed with carbonate and / or calcium oxide vmolámím ratio CaO: Al 2 O 3 equal to about 3: 3-5: 3, optimally 4: 3. The resulting feedstock mixture is ground, homogenized, optionally granulated and then heat-treated in a rotary kiln at temperatures ranging from 1150 ° C to 1350 ° C. During the heat treatment through reactions in the solid phase of predominately 3CaO.3Al .CaSO4 2 O 3, with a certain proportion of CaSO4, or with a lower content of CaO. The resulting product, i.e. the expansion component of expandable cements, is obtained by grinding the heat treated mixture to a specific surface area greater than 300 m 2 / kg.
Příklad provedení vynálezuDETAILED DESCRIPTION OF THE INVENTION
Surový kamenec hlinitoamonný, produkovaný například sanační technologií odsolování roztoků chemické těžby uranu, se semele a smíchá s mletým vápencem obsahujícím více než 90% CaCO3 vmolámím poměru CaO:Al2O3 - 4:3. Důkladně zhomogenizovaná surovinová směs se granuluje a tepelně zpracuje v rotační peci při teplotě 1230 °C. Rozemletím tepelně zpracovaného produktu, jehož hlavní fází je sloučenina 3CaO.3Al2O3.CaSO4, na měrný povrch 350 m2.kg'1 se připraví expanzní složka rozpínavých cementů.The crude alum ammonium produced, for example, by the desalination technology of uranium chemical extraction solutions, is ground and mixed with ground limestone containing more than 90% CaCO 3 in a molar CaO: Al 2 O 3 - 4: 3 ratio. The thoroughly homogenized feedstock mixture is granulated and heat treated in a rotary kiln at a temperature of 1230 ° C. Grinding the heat-treated product whose main phase is a compound 3CaO.3Al .CaSO 2 O 3 4 to the specific surface 350 m 2 .kg -1 Prepared expansion component expansive cements.
Průmyslová využitelnostIndustrial applicability
Vynález lze využít k přípravě expanzní složky rozpínavých cementů z kamence hlinitoamonného. Vynález je výhodné využít zejména pro přepracování kamence hlinitoamonného, vznikajícího jako odpadový produkt, např. při sanaci technologických roztoků hydrochemické těžby kovů, např. uranu, na průmyslově využitelný produkt. Výsledným produktem postupu podle vynálezu je expanzní složka rozpínavých cementů, ze které lze smícháním v množství 15 až 30 % s portlandským cementem, zpravidla s přísadou sádrovce CaSO4.2H2O v množství do 10 % oxidu vápenatého v množství dle potřeby do 5 % připravit rozpínavý cement optimálních vlastností. Rozsah expanze připravovaného rozpínavého cementu lze regulovat množstvím přídavku expanzní složky na bázi sloučeniny 3CaO.3Al2O3.CaSO4.The invention can be used to prepare an expansion component of expandable cements from alum ammonium alum. The invention is particularly advantageous for the conversion of alumina alum produced as a waste product, for example in the rehabilitation of technological solutions of hydrochemical mining of metals, such as uranium, into an industrially usable product. The resulting product of the present process is the expansion of the expanding cement component from which to mixing in an amount of 15 to 30% of Portland cement with added gypsum usually CaSO4.2H 2 O in an amount up to 10% calcium oxide in an amount as needed to prepare a 5% expandable cement of optimal properties. The extent of expansion of the prepared expandable cement can be controlled by the amount of addition of the expansion component based on the compound 3CaO.3Al 2 O 3 .CaSO 4 .
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CZ1997975A CZ286987B6 (en) | 1997-04-01 | 1997-04-01 | Process for preparing expansion component of aluminous cements based on compound 3CaO.3Ali2Oi3.CaSOi4 from ammonia alum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CZ1997975A CZ286987B6 (en) | 1997-04-01 | 1997-04-01 | Process for preparing expansion component of aluminous cements based on compound 3CaO.3Ali2Oi3.CaSOi4 from ammonia alum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CZ97597A3 CZ97597A3 (en) | 1998-10-14 |
| CZ286987B6 true CZ286987B6 (en) | 2000-08-16 |
Family
ID=5462545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CZ1997975A CZ286987B6 (en) | 1997-04-01 | 1997-04-01 | Process for preparing expansion component of aluminous cements based on compound 3CaO.3Ali2Oi3.CaSOi4 from ammonia alum |
Country Status (1)
| Country | Link |
|---|---|
| CZ (1) | CZ286987B6 (en) |
-
1997
- 1997-04-01 CZ CZ1997975A patent/CZ286987B6/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CZ97597A3 (en) | 1998-10-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| IF00 | In force as of 2000-06-30 in czech republic | ||
| MM4A | Patent lapsed due to non-payment of fee |
Effective date: 20030401 |