Effect of Quartzite Heat Treatment on Induction Furnace Lining Failure Mechanism

Zavertkin, A. S.

doi:10.1007/s11148-019-00310-4

Cited by 5 publications

(1 citation statement)

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“…There are various data in the literature on the temperature of transformation of α-quartz into cristobalite. It has been indicated that the transformation of quartz into cristobalite requires long exposure and an initial temperature of at least 1000 • C, and its transformation intensifies at 1250-1450 • C [35,36]. The initial transformation temperature also depends on the state of the silica, as the temperature can be relatively low (up to 900 • C) for silicic acid but much higher (up to 1200 • C) for rock crystal.…”

Section: Introductionmentioning

confidence: 99%

X-ray Diffraction Phase Analysis of Changes in the Lattice of Pervouralsk Quartzite upon Heating

et al. 2022

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At present, quartzite is widely used across many industries. The properties of quartzite significantly affect the technology used during the preparation of the raw materials as well as the technology used for manufacturing the final product, which may be intended for further operation at different temperatures. The purpose of the study was to create a scheme for the transformation of quartzite that would describe the changes in the parameters of its lattice parameter upon heating and would offer guidance regarding the drying technology and technology required to obtain tridymite. A Bruker D8 Advance diffractometer was used to study changes in the phase composition of quartzite at the temperatures of 200, 400, 600, 879, 1000, 1200, 1470, and 1550 °C. A detailed scheme of transformations of PKMVI-1 quartzite with a SiO2 content of at least 97.5% at normal pressure was proposed for crystalline modifications formed during its heating. As a result of this research, the changes in the parameters of the lattice parameter—such as the average interplanar distance davg, the volume of the unit cell Vavg, the density of the unit cell Davg, and the molecular weight Mavg—were established.

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Section: Introductionmentioning

confidence: 99%

X-ray Diffraction Phase Analysis of Changes in the Lattice of Pervouralsk Quartzite upon Heating

et al. 2022

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Assessment of potential tropical woody biomass for coal co-firing on slagging and fouling aspects

Suyatno¹,

Hariana²,

Prismantoko³

et al. 2023

Thermal Science and Engineering Progress

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Increasing the Efficiency of Foundry Production by Changing the Technology of Pretreatment with Quartzite

Cherepanov

Кукарцев

Kurashkin

et al. 2022

Metals

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The efficiency of the production of foundry products depends on the reliable operation of the melting furnace including, therefore, the durability of its lining. The most common material adopted for the production of an acid furnace crucible lining is quartzite, in which during the pretreatment (heating to 800 °C followed by holding), a tridymite phase appears that maintains a constant volume at 840–1470 °C for a long time and provides high lining durability of 300–350 melts, but only when using melting temperature regimes not exceeding 1500 °C. However, the absence of iron scrap leads to the smelting of synthetic iron from only one steel scrap using higher melting temperatures (1550–1570 °C), which sharply reduces the lifetime of the lining to 220 melts. This work is devoted to research aimed at establishing technology for the pretreatment with the original quartzite, which ensures the formation of a phase state that successfully withstands elevated temperatures for a long time. The studies were carried out using a Bruker D8 ADVANCE diffractometer and a Shimadzu XRF-1800 X-ray wave-dispersive spectrometer. The work consisted of drying samples of the original quartzite at temperatures of 200 and 800 °C with subsequent exposure to temperatures of 200, 400, 600, 870, 1000, 1200, 1470 and 1550 °C. As a result, the conditions for pretreatment of quartzite were established, during which during its further use, a cristobalite phase can be obtained, which makes it possible manufacture a high-temperature lining that ensures its high durability. The introduction of this technology will ensure the efficiency of the production of foundry products for enterprises operating induction crucible furnaces at industrial frequency.

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Effect of Quartzite Heat Treatment on Induction Furnace Lining Failure Mechanism

Cited by 5 publications

References 0 publications

X-ray Diffraction Phase Analysis of Changes in the Lattice of Pervouralsk Quartzite upon Heating

X-ray Diffraction Phase Analysis of Changes in the Lattice of Pervouralsk Quartzite upon Heating

Assessment of potential tropical woody biomass for coal co-firing on slagging and fouling aspects

Increasing the Efficiency of Foundry Production by Changing the Technology of Pretreatment with Quartzite

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