Characterization of Egyptian dolomitic magnesite deposits for the refractories industry

Serry, M. A.; El-Kholi, M. B.; El-Maghraby, M. S.; Telle, Rainer

doi:10.1016/s0272-8842(02)00012-3

Cited by 16 publications

(7 citation statements)

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“…At the same time, basic refractories can also be used in various fields as excellent robust material, resistant to heat and electricity, as well as good heat conductor [12]. To date, several research projects have been devoted to the recovery of materials in the field of ceramics, in particular the development and characterization of basic refractory ceramics due to their high refractory quality and their resistance to erosion and corrosion of metals and oxides [13][14][15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Effects of Lizardite Addition on Technological Properties of Forsterite-Monticellite Rich White Ceramics Prepared From Natural Magnesite and Dolomite

Manni

Harrati

Haddar

et al. 2020

Preprint

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Lizardite rich peridotite has never been used to prepare ceramic specimens, especially in Morocco. For this raison, potential use of naturally abundant lazirditic material from the Rif domain (NW morocco), as a supply for ceramic industry, has been evaluated. The effects of lizardite addition to magnesite and dolomite mixtures on the thermomechanical properties of the calcined ceramics were also detailed. To achieve this target, natural lizardite, magnesite and dolomite samples were collected in ultrabasic Beni Bousra massif. Those raw samples were used for the synthesis of a forsterite-monticellite rich ceramics. Both raw and sintered samples were characterized by x-ray diffraction (XRD), scanning electron microscope (SEM) and fourier transform infrared (FTIR). Main physical and mechanical properties were assessed and correlated to their respective microstructural changes. The obtained results showed that both magnesite and dolomite were mainly composed of MgCO3 and CaCO3. In contrast, lizardite sample showed high amounts of silica, magnesia and iron oxide. Technological tests indicated that the prepared mixtures had increased flexural strengths. An increased amount of lizardite in the initial mixtures enhanced mechanical properties of the prepared ceramic specimens. The same data showed that lizardite has led to a decrease in linear shrinkage during calcination and subsequently, the production of ceramics with the required technological properties. Thus, the preparation of lizardite-based ceramics from the raw material deposits of the Rif area, Morocco, is technically feasible, economically justifiable and socially desirable due to the contribution to the economic growth of the raw materials sector, especially ceramic industry.

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Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Effects of Lizardite Addition on Technological Properties of Forsterite-Monticellite Rich White Ceramics Prepared From Natural Magnesite and Dolomite

Manni

Harrati

Haddar

et al. 2020

Preprint

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“…Consequently, the present work aims to develop fireclay refractory bricks from naturally occurring raw materials from Uganda. Similar product development studies have been done elsewhere [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 87%

Fireclay Refractories from Ugandan Kaolinitic Minerals

Kirabira

Wijk

Jönsson

et al. 2006

steel research international

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In the present work, two deposits, one of kaolin and the other of ball clay, located in Uganda were investigated for the possibility of manufacturing fireclay refractories. Kaolin from the Mutaka deposit was used as the main source of alumina while ball clay from Mukono was the main plasticizer and binder material. The formulated green body was consolidated by wet pressing and fired at 1350°C in a tunnel kiln. Characterization of the sintered articles was done by X‐ray diffraction, scanning electron microscopy, and chemical composition (ICP‐AES). In addition, technological properties related to thermal conductivity, thermal shock, alkali resistance, water absorption, porosity, shrinkage, permanent linear change, linear thermal expansion, refractoriness under load, and cold crushing strength were determined. The properties of the articles manufactured from these naturally occurring raw minerals reveal that they compare favorably with those of parallel types. Thus, the raw materials can be exploited for industrial production.

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“…Magnesium oxide (MgO), magnesium chloride hexahydrate (MgCl 2 .6H 2 O), and tap water are the starting materials for preparation of MOC. Magnesia was prepared from Egyptian magnesite ore by calcination at a firing temperature of 650°C for 2 h. Magnesite exist in the Gabal Sul Hamed area in Eastern Desert of Egypt 15 while magnesium chloride hexahydrate is extra pure AR 99 %, SRL India. Chemical composition of the magnesite ore is presented in Table 1.…”

Section: Methodsmentioning

confidence: 99%

“…Their properties were determined with respect to amount particle size of SiC powder. 15 SiC particle embedded enhanced bulk density, compressive strength and abrasion resistance of neat (MOC) paste. 20 wt.…”

Section: Introductionmentioning

confidence: 99%

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Influence of preparation parameters on the properties of SiC abrasive stones and their applications

Hanna

Ajiba

Mansour

2023

Int J Ceramic Engine & Sci

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The preparation of highly efficient and low cost abrasive stones has gained considerable interest in the last few years from the industrial and academic research societies. Meanwhile, composition of such abrasive stones material has played a significant role on its physicochemical, mechanical properties and cost. In this work, series of magnesium oxychloride cement samples were prepared by adding MgCl2 solutions to magnesia, where H2O/MgCl2 was 13:1, 15:1, and 17:1, while MgO/ MgCl2 molar ratio was fixed at 7:1 for all samples. During mixing, two grades of SiC were added separately in proportions of 20, 25, and 30 mass percentage. A comprehensive characterization including bulk density, compressive strength, abrasion resistance, and polishing performance were carried out to the prepared composites samples. This was followed by studying their mineral composition and the possible use in grinding and polishing processes of marble slabs. Interestingly, the obtained characterization results demonstrated that among the different prepared composite materials, 25 mass percent SiC‐containing samples showed the best physicochemical and mechanical properties. Notably, the degree of fineness of SiC has affected the overall properties of SiC composite. When very fine SiC type was used and the water content was reduced, consequently, the samples bulk density and abrasion resistance increased. Phase 5 (5Mg(OH)2.MgCl2.8H2O) and silicon carbide, as the main phases with a minor amount of magnesia, were detected in the samples. From the economic point of view, the obtained result in our study is promising for its high performance‐low cost for grinding and polishing of marble slabs in the industrial fabrication.

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Characterization of Egyptian dolomitic magnesite deposits for the refractories industry

Cited by 16 publications

References 1 publication

WITHDRAWN: Effects of Lizardite Addition on Technological Properties of Forsterite-Monticellite Rich White Ceramics Prepared From Natural Magnesite and Dolomite

WITHDRAWN: Effects of Lizardite Addition on Technological Properties of Forsterite-Monticellite Rich White Ceramics Prepared From Natural Magnesite and Dolomite

Fireclay Refractories from Ugandan Kaolinitic Minerals

Influence of preparation parameters on the properties of SiC abrasive stones and their applications

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