Elaboration of a high mechanical performance refractory from halloysite and recycled alumina

Haddar, Abdelilah El; Manni, Ahmed; Azdimousa, Ali; Hassani, Iz-Eddine El Amrani El; Bellil, Abdelilah; Sadik, Chaouki; Fagel, Nathalie; Ouahabi, Meriam El

doi:10.1016/j.bsecv.2019.08.002

Cited by 17 publications

(10 citation statements)

References 26 publications

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“…Due to the growing concern about the economy and the recovery of the basic ceramic industry in Morocco, it is becoming imperative and crucial to look for new raw materials containing magnesium. However, the main focus of discussion only to use three essential minerals forming the rocks: Magnesite, dolomite and lizardite situated in the Rif of Morocco, and which has other secondary materials: perlite, halloysite, diatomite, bentonite and red clays [24][25].…”

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WITHDRAWN: Effects of Lizardite Addition on Technological Properties of Forsterite-Monticellite Rich White Ceramics Prepared From Natural Magnesite and Dolomite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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“…Moroccan halloysite-rich clay with a high content of aluminum was the major raw material for the production of new silico-aluminous refractory products after firing at 1300 and 1500 °C by Haddar et al [ 54 ]. Due to the high shrinkage of halloysite, it was mixed with local diatomite, marl and silica sand, improving the cracking phenomena during the sintering.…”

Section: Summarizing Papers and Discussionmentioning

confidence: 99%

“…The increased halloysite content affected the final mullite content increase, starting to be formed at ~950–1170 °C. Higher amounts of clay raw material with low percentages of halloysite could be used in the prepared initial mixtures compared to halloysite-rich clays with higher contents of halloysite, in order to produce acceptable ceramics (e.g., [ 46 , 54 ]). Moreover, among different clay raw materials, those with higher contents of halloysite exhibited higher plasticity as well drying shrinkage (e.g., [ 37 ]) due to predominant tubular morphology of halloysite with its small particle size and water content.…”

Section: Summarizing Papers and Discussionmentioning

confidence: 99%

“…Among studies in which clay raw material's quantitative mineralogical results were provided, the halloysite amount varied over a wide range (7-90 wt%), with most of cases detected up to 40 wt% and only a few <20 wt%. Despite of these differentiations, the majority of these studies focused on the same direction of mullite-based ceramic production and less other refractories after firing in most cases up to~1350 • C. The increased halloysite content affected the final mullite content increase, starting to be formed at~950-1170 • C. Higher amounts of clay raw material with low percentages of halloysite could be used in the prepared initial mixtures compared to halloysite-rich clays with higher contents of halloysite, in order to produce acceptable ceramics (e.g., [46,54]). Moreover, among different clay raw materials, those with higher contents of halloysite exhibited higher plasticity as well drying shrinkage (e.g., [37]) due to predominant tubular morphology of halloysite with its small particle size and water content.…”

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Halloysite in Different Ceramic Products: A Review

Lampropoulou

Papoulis

2021

Materials

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The increased demands of our rapidly developing way of life lead to the broadening of the ceramic market among other effects. Due to the advanced ceramic properties of halloysite and its abundance, combined with its good synergistic effect with other materials, it has been investigated for multifarious possible applications to produce traditional and advanced ceramics as well as ceramic composites. In this review, a substantial number of studies by several investigators into halloysite-based ceramics were are summarized. The possibilities and limitations of different halloysite-based ceramic materials for future applications are also discussed in this manuscript and new fields of research are proposed. The summarization of published results indicates a constant scientific interest in halloysite-based traditional ceramics and new potential uses in the future. Additionally, investigations on different novel ceramic composites with low cost halloysite nanotubes (HNTS) have rapidly increased, covering different scientific and technological areas. On the other hand, research into advanced ceramics (SiAlONS) has been pursued due to its highly cost effective technology treatments on a large scale.

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“…Concern about environmental issues around the world has grown in recent decades, especially in the academic community and research has strongly focused on the development of sustainable methods aimed at recycling inorganic waste [14][15][16][17][18][19][20][21][22][23][24] . Many studies have emphasized interest in the development of compositions suitable for the production of refractories coatings used in ovens.…”

Section: Introductionmentioning

confidence: 99%

Refractory Ceramics of Clay and Alumina Waste

et al. 2021

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Refractory ceramics were produced from clays and alumina waste. Specimens were shaped by uniaxial pressing, subjected to thermal analysis by dilatometry and heat-treated in a conventional furnace at 1300 and 1400ºC, applying a heating rate of 5ºC/min and a dwell time of 2 and 3 hours at the maximum temperature. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and physicomechanical properties. The dilatometric analysis before heat treatment indicated that the formulation containing the largest amount of fluxing oxides presented the highest linear shrinkage. The XRD analysis revealed that mullite was the major phase and needle shaped crystals typical of mullite obtained from clay minerals were observed by SEM. The increase in firing temperature and dwell time at the maximum temperature improved the physicomechanical properties of the specimens. The thermal expansion coefficient (TEC) in the range of 25 to 1000ºC varied from 6.2 to 6.9 x 10 -6°C-1 .

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Elaboration of a high mechanical performance refractory from halloysite and recycled alumina

Cited by 17 publications

References 26 publications

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

Halloysite in Different Ceramic Products: A Review

Refractory Ceramics of Clay and Alumina Waste

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