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Abstract

The calcination product of limestone is a strategic industrial product. This work evaluates the suitability of AlKoraymat-AlZafarana limestones for calcination. These limestones are near to the electrical and gas stations of the Alkoraymat area, Egypt. Spot samples and channel samples were collected and tested for their petrographic, chemical and mineral composition using transmitted light microscopy, X-ray micro-tomography, scanning electron microscopy, X-ray fluorescence, X-ray diffraction, differential and thermo-gravimetric analyses. The representative channel samples were calcined in a muffle furnace at 1000°C for different decarbonation times and then analysed for the free lime determination by applying the Sugar method. About 5 million tons of chemically pure limestone are estimated at Alkoraymat. The average CaO content is 55% and the total impurity oxides (SiO₂, Al₂O₃ and Fe₂O₃) is 0·73%. The limestone microstructure is mainly grain-supported and dominated by Nummulites cemented by neomorphic–sparitic groundmass. The optimum calcination condition is 1000°C for 1 h for all channel samples. Some samples show higher calcination rate than the others due to their characteristic interparticle together with the intraparticle pores. The post-calcination distribution maps of the limestone purity and free lime indicate that these limestones could be quarried in the SE direction for calcination and lime production.

Keywords

LIMESTONE CALCINATION ALKORAYMAT EGYPT

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References

Abu-zeid

M. M.

, Sharaf El-Din

A. M.

, Serry

M. A.

and Soltan

A. M

. 2008. Relative importance and impact of the petrographic components of some Egyptian limestones on quicklime production, Proc. 3rd Int. Conf. on ‘The geology of the Tethys', 233–250, Aswan, South Valley University.

and Dogu

. 2001. Calcination kinetics of high purity limestone, J. hem. Eng., 83, 120–125.

ASTM Standard C25-06, 2006. Standard test methods for chemical analysis of limestone, quicklime and hydrated lime, ASTM International, West Conshohocken, PA, USA.

Baziotis

, Leontakianakos

, Proyer

, Lee

and Tsimas

. 2011. Physico-chemical properties of different carbonate rocks: are they high enough to control lime reactivity?, Int. J. Chem., 3, 187–193.

Bhattacharya

T. K.

, Ghosh

and Das

S. K

. 2001. Densification of reactive lime from limestone, Ceram. Int., 27, 455–459.

Boynton

W. V

. 1980. Chemistry and technology of lime and limestone, 2nd edn, New York, Wiley.

Cheng

and Specht

. 2006. Reaction rate coefficients in decomposition of lumpy limestone of different origin, Thermochim. Acta, 449, 8–15.

Commandré

J.-M.

, Salvador

and Nzihou

. 2007. Reactivity of laboratory and industrial limes, Trans. IChemE, Part A, Chem. Eng. Res. Des., 85, 473–480.

Dogu

and Dogu

. 1992. Kinetics of capture of sulphur dioxide and applications to flue gas desuffurization, in Chemical reactor technology for environmentally safe reactors and products, (ed. H. J. de Lassa et al), Dordrecht, Kluwer Academic Publishers.

10.

El-Sayed

. 2005. Solar supported steam production for power generation in Egypt, Energy Policy, 33, 1251–1259.

11.

ISO 5018:1983. Refractory materials-Determination of true density.

12.

ISO 10059–1:1992. Dense, shaped refractory products-Determination of compressive strength.

13.

Khraisha

Y. H.

and Dugwell

D. R

. 1992. Coal combustion and limestone calcination in a suspension reactor, Chem. Eng. Sci, 47, 993–1006.

14.

Koukis

and Sabatakakis

. 2002. Technical geology, 1st edn, 516, Athens, Papasotiriou.

15.

Koyuncu

. 1985. A kinetic study for the sorption of SO₂ on calcined limestones, Master's dissertation, METU, Ankara, Turkey.

16.

Mackenzie

R. C

. 1970. Differential thermal analysis, Vol. 1, 773, London and New York, Academic Press.

17.

Moffat

and Walmsley

M. R. W

. 2004. Improving energy efficiency of a lime kiln, Proc. Joint SCENZ/FEANZ/SMNZI Conf., Hamilton, Canada, July, 17–24.

18.

Moropoulou

, Bakolas

and Aggelakopoulou

. 2001. The effects of limestone characteristics and calcination temperature to the reactivity of quicklime, Cem. Conc. Res., 31, 633–639.

19.

Moustafa

A. M. A

. 1975. Some geological studies on the Eocene rocks in Qattamia area, Master's dissertation, Faculty of Science, Ain Shams University, Cairo, Egypt.

20.

Oates

J. A. H

. 1998. Lime and limestone, chemistry and technology, production and uses, 9–62, 117–250, Weinheim, Wiley-VCH.

21.

Potgieter

J. H.

, Potgieter

S. S.

and DeWaal

. 2003. An empirical study of factors influencing lime slaking. Part II: lime constituents and water composition, Water SA, 29, 157–160.

22.

Rilem

T. C

. 1980. Recommendations issued by 13-MR committee on mortars and renderings, Mater. Struct., 13, 55–66.

23.

Said

. 1962. The geology of Egypt, 317, Amsterdam, Elsevier Pub. Co.

24.

Schwarzkopf

. 1994. Lime burning technology - a manual for lime plant operators, 3rd edn, Danville, PA, Svedala Industries, Kennedy Van Saun.

25.

Shin

H. G.

, Kim

Y. N.

and Lee

H. S

. 2009. Effect of reactivity of quick lime on the properties of hydrated lime sorbent for SO₂ removal, J. Mater. Sci Technol, 25, 329–332.

26.

Soltan

A. M

. 2011. Petrographic modelling of Egyptian limestones for quicklime production, Arab. J. Geosci., 4, 803–815.

27.

Soltan

A. M

., Kahl

W.-A.

, Wendchau

and Hazem

2011a. Microstructure and reactivity of calcined mud supported lime-stones, Mineral Process. Extractive Metall., 120, DOT: 10.1179/ 1743285511Y.0000000024.

28.

Soltan

A. M

., Kahl

W.-A.

, Hazem

M. M.

, Wendschuh

and Fischer

R. X.

2011b. Thermal microstructural changes of grain-supported limestones, Miner. Petrol, DOT 10.1007/s00710-011-0151–0.

29.

Soltan

A. M

. and Sem+

M. A.

2011. Impact of limestone microstructure on the calcination activation energy, Adv Applied Ceram., No. 7, vol. 11, P. 409–416.

30.

United States Geological Survey (USGS) Minerals Resources Program (2009). 7, (11) 409–416.

Applicability of Egyptian limestones for calcination

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