Study by X-Ray Methods of the Effect of Temperature on Crystal Lattice Interplanar Distances of Pervoural’sk Quartzite Used for Induction Furnace Lining

Кукарцев, В. В.; Abkaryan, A. K.

doi:10.1007/s11148-014-9622-2

Cited by 11 publications

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“…Therefore, scientists studied the changes in the lattice parameter of quartzite during heating, using modern, structural X-ray analysis. A sampling of these studies is presented in [6][7][8]. This research made it possible to establish new technological regimes for the preparation of quartzite lining that would improve its durability.…”

Section: Introductionmentioning

confidence: 99%

“…Complex substances, formed as a result of the combination of chemical elements, number in the hundreds of thousands. These complex substances have a variety of properties as a result of the differences in their chemical compositions and their mutual arrangements of atoms (i.e., their structures) [8]. Only diffraction methods (e.g., X-ray, neutron diffraction, and electron diffraction) have the ability to characterize crystalline phases [9].…”

Section: Introductionmentioning

confidence: 99%

“…For this study, a Bruker D8 Advance diffractometer with Bragg-Brentano focusing with a high-temperature HTK 16 camera was used. An X-ray tube with a copper anode was used, and the diffraction pattern was recorded with a VÅNTEC-1 high-speed position-sensitive detector with step 0.007 • , time for one measurement was 1 h [8].…”

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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%

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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“…Since the degree of regeneration of one quartz modification into another is primarily affected by firing used for moisture removal, studies were conducted in two stages. In the first stage quartzite was used from which moisture was removed by heating up to 800°C followed by holding for 2 h, as a result of which a shift occurred in the interplanar distance, and after performing the sintering regime a-tridymite appeared in quartzite [14]. Interplanar distance is shown in Fig.…”

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Effect of Melting Temperature Regimes on Change of Interplanar Distance in Quartzite

Кукарцев¹,

Kukartsev

2019

Refract Ind Ceram

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The reliability of an industrial frequency crucible (IFC) induction furnace, used in casting manufacture, depends on its lining life. For this reason quartzite as the cheapest acid lining material is the subject of considerable research work both in our country and overseas. The aim of the present research is development of manufacturing technology and operation of an acid lining that is used for melting alloys and with melt operating temperatures above 1450°C. The action of melt thermal regimes on the change in interplanar distances within the quartzite structure affecting furnace lining life is studied.

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“…However, an analysis made of quartzite calcining regimes showed that changes still take place in quartzite which is calcined at 800°C and then cooled to the ambient temperature [2]. There is no change in the dimensions of the cells of the crystalline lattice, but there is a shift in the interplanar angle and a change in the distances between planes.…”

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Study of the Phase Composition of Spent Quartzite Lining from a Crucible-Type Industrial Frequency Induction Furnace by X-ray methods

2015

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Results are presented from a study of the phase composition of spent quartzite lining from a crucible-type industrial frequency induction furnace. The study is performed by the methods of x-ray analysis. The lining that was examined contained quartzite, boric acid, and electrocorundum. Different regions of the lining were identified and their phase composition was determined along with the changes in the lattice parameters of the components of each region's phases.Keywords: crucible-type industrial frequency induction furnace (IFC), x-ray phase analysis (XRD), quartzite, layer of the lining.Crucible-type industrial-frequency induction furnaces (IFCs) first began to be frequently used to make cast iron in the USSR at the beginning of the 1970s. In accordance with the requirements of the designers of these furnaces, at the time the cast iron was made from a metallic charge that consisted of foundry iron, conversion iron, factory wastes, the liquid residue in the furnace (1/3 of its capacity), cast-iron scrap, and steel scrap. The scrap comprised 10 -15% of the charge. The temperature at which the melt was formed in the furnace was limited to 1450°C -higher temperatures were not needed for a metallic charge of this type. Also, the temperature just indicated was consistent with the recommendations of the furnaces' manufacturers.Such factories as GAZ, VAZ, and ZIL used Pervouralsk quartzite to make the lining of induction furnaces (models IChT6 -IChT10). The quartzite was first calcined at 800°C for 6 -8 h to dry it and make it more thermally stable. The quartzite was not allowed to have a moisture content greater than 0.3%, so that the design of the foundries of metallurgical plants provided for installation of the equipment needed to meet this requirement. The plans for future foundries were subsequently modified to include equipment which performs the calcining operation needed to dry quartzite. The concept of "synthetic cast iron" then gained currency, this being cast iron made from a metallic cold charge which has a steel scrap content of at least 30%. The production of such cast iron shortened the life of the lining, since it had to function at temperatures up to 1550°C.In Russia, it became impossible to make cast iron on a standard cold charge due to a dearth of scrap iron; the output of foundry iron and conversion iron declined and manufacturers' costs -including transportation costs -rose sharply. As a result, the content of steel scrap in the charge climbed to 70 -80% at many factories. There was a corresponding increase in temperature in the production process, and the durability of the lining began to decrease significantly.The life of the lining is improved by including electrocorundum in its composition. The use of electrocorundum makes the lining more resistant to wear by the melt during operation of the furnace on a cold charge and at high temperatures. The properties of the lining are also affected by the technology used to dry the quartzite. The practice of including quartzite in the lining was based...

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Study by X-Ray Methods of the Effect of Temperature on Crystal Lattice Interplanar Distances of Pervoural’sk Quartzite Used for Induction Furnace Lining

Cited by 11 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

Effect of Melting Temperature Regimes on Change of Interplanar Distance in Quartzite

Study of the Phase Composition of Spent Quartzite Lining from a Crucible-Type Industrial Frequency Induction Furnace by X-ray methods

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