Strength Properties Control of Mixtures Based on Soluble Glass with Ethereos Solidifiers

Ponomarenko, Olga; Berlizeva, Tatyana; Grimzin, Igor; Yevtushenko, Nataliіa; Lysenko, Tatiana

doi:10.1007/978-3-030-50794-7_50

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…Conventional foundry binders are responsible for up to 70% of a foundry's volatile organic compound emissions [15]. e source of unsatisfactory environmental situation is also the spread of sand-resin mixtures [16][17][18]. New binder technologies are essential for both foundries and the environment.…”

Section: Introductionmentioning

confidence: 99%

Structural Construction of Binders Based on Orthophosphoric Acid and Refractory Materials

Liutyi

Liuta

Petryk

2021

Advances in Materials Science and Engineering

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The formation of phosphate binders in systems based on orthophosphoric acid and the most common refractory fillers in foundry technology (quartz dust, zircon ZrSiO4, and kyanite-sillimanite Al2SiO5) has not been previously studied. The phase composition of these inorganic binders was studied, and the formation of silicon SiP2O7 and zirconium ZrP2O7 pyrophosphates was confirmed. The study by differential thermogravimetric analysis in the temperature range of 20–1000°С established the fact that the formed binders are thermally stable and do not emit harmful gaseous substances. The obtained results of the studied binders make it possible to develop new environment-friendly core mixtures of thermal hardening.

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Section: Introductionmentioning

confidence: 99%

Structural Construction of Binders Based on Orthophosphoric Acid and Refractory Materials

Liutyi

Liuta

Petryk

2021

Advances in Materials Science and Engineering

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“…The development of new binders and improvement of already known inorganic ones is relevant from a scientifi c and practical point of view [6,7]. In recent years, interest has increased again in phosphate materials, the study on which began in the middle of the twentieth century.…”

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confidence: 99%

Synthesis of phosphosulphate substance and properties of its structured mixture with quartz sand

Liutyi¹,

Tyshkovets²,

Yamshinskij³

et al. 2022

Nauk. visn. nat. hirn. univ.

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Purpose. Creation of binder based on orthophosphoric acid and aluminum sulfate, study on its structure and physicochemical patterns of formation, determination of the properties of structured mixtures for the needs of foundry. Methodology. In the work, X-ray qualitative and quantitative analysis was performed on the Rigaku Ultima IV unit, and differential thermal analysis was performed on the STA 449 C Jupiter synchronous thermal analyzer. Orthophosphoric acid, technical thermal, of 85% concentration, 18-hydrous sulfate of aluminum Al2(SO4)3 18H2O and quartz sand of brand 3K5O3025 were used. The strength of core mixtures was determined on the US-700 unit on standard cylindrical samples with a diameter and height of 50mm. The roughness of the cast surfaces was determined on a profilometer model 107622 with computer processing of the obtained data and construction of profilograms. To determine the propensity of the core mixtures to form caking, a hexagon sample was used according to the method by M.Fedorov. Breakability was determined on standard cylindrical samples with a diameter and height of 50 mm according to the original method described in the text of the article. Findings. For the first time, the mechanism of formation of aluminum phosphates with binding properties during the interaction of aluminum hydrate crystal sulfate Al2(SO4)3 18H2O with orthophosphoric acid in the temperature range of 100200 has been investigated. The formation is proved of an intermediate phase during heating aluminum hydroxide Al(OH)3, which, in contrast to its sulfate, according to the results of thermodynamic analysis is able to interact with acid. Formation of aluminum in the system of ortho- and metaphosphates, which features binding properties and ensures high strength of samples based on quartz filler, has been established. The thermal transformations of the obtained binder, which consists of a combination of aluminum phosphates with its residual sulfate, are studied. Stages of gradual disintegration of crystal hydrates, formation of new aluminum phosphates and thermal decomposition of residual sulfate are recorded. The tendency to burn and knockout of the developed core mixtures was determined. Originality. For the first time, a description has been developed of the mechanism of formation of aluminum phosphates with binding properties during the interaction of its sulfate crystal hydrate Al2(SO4)3 18H2O with orthophosphoric acid in the temperature range of 100200. Practical value. A new inorganic binder from orthophosphoric acid and 18-aqueous aluminum sulfate has been obtained for foundry production. The scheme of its preparation involves preliminary mixing and heating of the specified reagents with the resulting formation of a dry powder material which consists of phosphates and residual aluminum sulfate, and therefore it is called phosphosulfate. The binding has a long shelf life and is introduced into the mixture in a ready-made form while the technology of its production is less energy-intensive and long-lasting compared to the preparation of traditional metal phosphate binding.

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Control of the Physical and Mechanical Properties of Mixtures Based on Liquid Glass with Various Fillers

Berlizieva

Ponomarenko

Grimzin³

et al. 2022

Lecture Notes in Mechanical Engineering

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Strength Properties Control of Mixtures Based on Soluble Glass with Ethereos Solidifiers

Cited by 4 publications

References 4 publications

Structural Construction of Binders Based on Orthophosphoric Acid and Refractory Materials

Structural Construction of Binders Based on Orthophosphoric Acid and Refractory Materials

Synthesis of phosphosulphate substance and properties of its structured mixture with quartz sand

Control of the Physical and Mechanical Properties of Mixtures Based on Liquid Glass with Various Fillers

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