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Keywords = marblewood dust

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9 pages, 2215 KiB  
Article
Evaluation of Marblewood Dust’s (Marmaroxylon racemosum) Effect on Ignition Risk
by Miroslava Vandličkova, Iveta Markova, Katarina Holla and Stanislava Gašpercová
Appl. Sci. 2021, 11(15), 6874; https://doi.org/10.3390/app11156874 - 26 Jul 2021
Cited by 10 | Viewed by 2293
Abstract
The paper deals with the selected characteristics, such as moisture, average bulk density, and fraction size, of tropical marblewood dust (Marmaroxylon racemosum) that influence its ignition risk. Research was focused on sieve analysis, granulometric analysis, measurement of moisture level in the [...] Read more.
The paper deals with the selected characteristics, such as moisture, average bulk density, and fraction size, of tropical marblewood dust (Marmaroxylon racemosum) that influence its ignition risk. Research was focused on sieve analysis, granulometric analysis, measurement of moisture level in the dust, and determination of the minimum ignition temperatures of airborne tropical dust and dust layers. Samples were prepared using a Makita 9556CR 1400W grinder and K36 sandpaper for the purpose of selecting the percentages of the various fractions (<63, 63, 71, 100, 200, 315, 500 μm). The samples were sized on an automatic vibratory sieve machine Retsch AS 200. More than 65% of the particles were determined to be under 100 μm. The focus was on microfractions of tropical wood dust (particles with a diameter of ≤100 µm) and on the impact assessment of particle size (particle size < 100 µm) on the minimum ignition temperatures of airborne tropical dust and dust layers. The minimum ignition temperature of airborne marblewood dust decreased with the particle size to the level of 400 °C (particle size 63 μm). Full article
(This article belongs to the Special Issue Application of Wood Composites II)
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15 pages, 22949 KiB  
Article
Tropical Wood Dusts—Granulometry, Morfology and Ignition Temperature
by Miroslava Vandličková, Iveta Marková, Linda Makovická Osvaldová, Stanislava Gašpercová, Jozef Svetlík and Jozef Vraniak
Appl. Sci. 2020, 10(21), 7608; https://doi.org/10.3390/app10217608 - 28 Oct 2020
Cited by 14 | Viewed by 3825
Abstract
The article considers the granulometric analysis of selected samples of tropical wood dust from cumaru (Dipteryx odorata), padauk (Pterocarpus soyauxii), ebony (Diospyros crassiflora), and marblewood (Marmaroxylon racemosum) using a Makita 9556CR 1400 W grinder and [...] Read more.
The article considers the granulometric analysis of selected samples of tropical wood dust from cumaru (Dipteryx odorata), padauk (Pterocarpus soyauxii), ebony (Diospyros crassiflora), and marblewood (Marmaroxylon racemosum) using a Makita 9556CR 1400 W grinder and K36 sandpaper, for the purpose of selecting the percentages of the various fractions (<63; 63; 71; 200; 315; 500 μm) of wood dust samples. Tropical wood dust samples were made using a hand orbital sander Makita 9556CR 1400 W, and sized using the automatic mesh vibratory sieve machine Retsch AS 200 control. Most dust particles (between 50–79%) from all wood samples were under 100 μm in size. This higher percentage is associated with the risk of inhaling the dust, causing damage to the respiratory system, and the risk of a dust-air explosive mixture. Results of granulometric fractions contribution of tropical woods sanding dust were similar. Ignition temperature was changed by particle sizes, and decreased with a decrease in particle sizes. We found that marblewood has the highest minimum ignition temperature (400–420 °C), and padauk has the lowest (370–390 °C). Full article
(This article belongs to the Special Issue Application of Wood Composites)
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