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Keywords = furnace for painting combustion

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18 pages, 16904 KB  
Article
Analysis of Composition, Properties, and Usage Efficiency of Different Commercial Salt Fluxes for Aluminum Alloy Refining
by Boris Kulikov, Evgeniy Partyko, Aleksandr Kosovich, Pavel Yuryev, Yulbarskhon Mansurov, Nikita Stepanenko, Yuriy Baykovskiy, Dmitry Bozhko, Alexander Durnopyanov, Nikolay Dombrovskiy and Maxim Baranov
Metals 2025, 15(4), 448; https://doi.org/10.3390/met15040448 - 16 Apr 2025
Cited by 7 | Viewed by 3852
Abstract
One of the key problems in the billet and shaped casting of aluminum alloys is the presence of various undesirable inclusions and impurities in the melt, which can serve as stress concentrators in the finished product, as well as dissolved hydrogen, which contributes [...] Read more.
One of the key problems in the billet and shaped casting of aluminum alloys is the presence of various undesirable inclusions and impurities in the melt, which can serve as stress concentrators in the finished product, as well as dissolved hydrogen, which contributes to the formation of porosity. The interaction of aluminum with other gases produced by the combustion of fuel particles, oil, and paint materials brought into the furnace together with charge and scrap increases the amount of nitrides, oxides, carbides, and sulfides in the melt. Flux treatment is widely used as protection of aluminum alloys from oxidation and removal of impurities. The present paper reports the data of a comparative analysis of five widely used flux compositions based on sodium, potassium, and magnesium chlorides. The study covers the following aspects: chemical composition, moisture content, melting temperature and melting range, particle size distribution, and refining ability as measured by the change in Na, Ca, and H2 content after melt treatment. Full article
(This article belongs to the Section Metal Casting, Forming and Heat Treatment)
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8 pages, 1632 KB  
Article
Analysis of Combustion Process of Protective Coating Paints
by Andrzej Polanczyk, Malgorzata Majder-Lopatka, Anna Dmochowska and Zdzislaw Salamonowicz
Sustainability 2020, 12(10), 4008; https://doi.org/10.3390/su12104008 - 14 May 2020
Cited by 5 | Viewed by 4198
Abstract
Structural elements in buildings exposed to high temperature may lose their original stability. Application of steel structures has several advantages; however, deflection under exposure to high temperatures may be a potential obstacle. Therefore, the aim of the study was to determine how temperature [...] Read more.
Structural elements in buildings exposed to high temperature may lose their original stability. Application of steel structures has several advantages; however, deflection under exposure to high temperatures may be a potential obstacle. Therefore, the aim of the study was to determine how temperature affects decomposition of protective paints applied in the construction. A dedicated installation for the analysis of the combustion process of protective coating paints in a laboratory scale was prepared. The experimental device consisted of the following parts: top-loading furnace connected to the gas conditioner, the LAT MG-2 gas mixer, and portable gas analyzer GASMET DX-4010. The following type of the protective powder coating paints were analyzed: alkyd and polyurethane. The obtained results indicated that during thermal decomposition of paints, formaldehyde, benzene, heptane, and butanol were released, however in different concentrations. Moreover, decomposition temperature affected the type and amount of released gas mixture components. With increasing temperature, increased release of formaldehyde and benzene was noticed, while the concentration of butanol and heptane decreased. Finally, the product of thermal decomposition emitted in the highest concentration was formaldehyde, which can cause irritation and sensitization in humans. Full article
(This article belongs to the Special Issue Green Technologies in Air Treatment)
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