On loosening of refractory clays in roasting

Karklit, A. K.; Kaplan, F. S.

doi:10.1007/bf02693834

Cited by 2 publications

(6 citation statements)

References 2 publications

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“…The range was higher than in raw materials used in ceramic tile production [7]. The sintering range in the raw composites was wider with a higher quantity of kaolinite, which was contrary to the previous ndings [38]. The sintering range in this data set showed correlations to the content of SiO 2 and loss on ignition, and not the K 2 O content as reported previously [28,47].…”

Section: Behavior Related To the Ring Processcontrasting

confidence: 60%

“…Above 1100 °C, samples showed expansion from 0.07 (CR12) to 0.72% (CR11) with peaks at around 1105 (CR12) and 1125 °C (CR3), due to the crystallization of cristobalite [28,36,37]. The dilatation at high temperatures can also be inuenced by the content of uxes, especially alkali oxides [38].…”

Section: Dilatometrymentioning

confidence: 99%

“…The total shrinkage was mainly related to the content of kaolinite in the composites. Since the composites CR5 and CR16 experienced bloating during ring, they are not considered suitable to be used as refractory materials if red following a fast regime [26,28,38].…”

Section: Dilatometrymentioning

confidence: 99%

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Raw kaolinitic–illitic clays as high-mechanical-performance hydraulically pressed refractories

Vasić

Radovanović

Pezo

et al. 2022

J Therm Anal Calorim

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The usage possibility of 19 composites of raw refractory clays from Serbia containing approximately 53.29% of SiO 2 and 26.73% of Al 2 O 3 is presented. The sum of uxing oxides was 57.74%, while these materials contained 32% of quartz, 29% of kaolinite and 26% of illite-mica. Dilatometry tests revealed a sudden shrinkage with the peak at approximately 1115 °C, owing to the formation of mullite. The refractoriness was in the range of 1581-1718 °C, which classies the composites from low-to high-duty refractories. Based on correlation analysis, the refractoriness mostly depended on the content of alumina. The lightness of the red test pieces was lower after ring when compared to the dry samples, and it decreased with the ring temperature from reddish to grayish. The study presents a novel attempt to dene all the necessary properties of raw refractory clays and products red at the 1100-1300 °C range on a laboratory level. Most of these clays can be used as natural refractory materials for ceramic and glass furnace lining. The organic matter in some of the samples inuences negatively the fast-ring process.

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Section: Behavior Related To the Ring Processcontrasting

confidence: 60%

Section: Dilatometrymentioning

confidence: 99%

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Raw kaolinitic–illitic clays as high-mechanical-performance hydraulically pressed refractories

Vasić

Radovanović

Pezo

et al. 2022

J Therm Anal Calorim

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“…(1) Oxidation of carbonaceous impurities contained in the kaolinite in the temperature range 370-420 ° C [3] (the first exothermal effect in the DTA curve in Fig. 1).…”

Section: Resultsmentioning

confidence: 99%

“…The kaolinite is a chemically inert It is known that kaoline clays are prone to loosening (expansion) at temperatures above 1300 ° C if they contain a specific amount of alkali components (Na 2 O + K 2 O ≥ 1.05 wt %) and iron oxide (Fe 2 O 3 ≥ 2.3 wt %) [3]. An insignificant content of impurities in our kaolinite makes it possible to minimize its loosening upon sintering and to avoid the expansion of samples and the formation of cracks.…”

Section: Synthesis Of Ceramic Materialsmentioning

confidence: 99%