粉煤灰微球窄组分作为复合材料基础的抗压耐酸性能

IF 0.5 Q4 CHEMISTRY, MULTIDISCIPLINARY

Journal of Siberian Federal University. Chemistry Pub Date : 2020-06-01 DOI:10.17516/1998-2836-0174

G. Akimochkina, E. S. Rogovenko, E. Fomenko

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引用次数: 0

摘要

研究了Ekibastuz和irshaborodinsky煤燃烧后粉煤灰中SiO2-Al2O3-FeO体系平均粒径为5、8和25 μm的微球窄馏分，以及粒径为4和10 μm的CaO-SiO2-Al2O3 - FeO体系的破碎试验和耐酸性能。结果表明，两种原料的灰分均具有较高的强度特征:在51.7 MPa压力下，dav = 25 μm的较大窄段微球不会被压缩载荷破坏，dav≤10 μm的分散窄段微球在68.9 MPa压力下不会被破坏。铝硅酸盐组成的微球窄馏分具有良好的耐酸性能;用15%盐酸在65°C下处理30分钟后，体重减轻10-15 wt. %

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Crush and Acid Resistance of Microsphere Narrow Fractions from Fly Ash as the Basis of Composite Materials

The crush test and acid resistance of microsphere narrow fractions with average diameter dav of 5, 8 and 25 μm of the SiO2–Al2O3–FeO system and with dav of 4 and 10 μm the CaO–SiO2–Al2O3– FeO system separated from fly ash from pulverized combustion of Ekibastuz and Irsha-Borodinsky coals were studied. It has been established that all investigated ash fractions of both raw materials are characterized by high strength: microspheres of a larger narrow fraction with dav = 25 μ m a re not destroyed by compressive loading at pressures up to 51.7 MPa, dispersed narrow fractions of microspheres with dav ≤ 10 μm – up to 68.9 MPa. Microsphere narrow fractions with aluminosilicate composition have satisfactory acid resistance; the weight loss after treatment with 15 % hydrochloric acid at 65 °C for 30 minutes was 10–15 wt. %

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来源期刊

Journal of Siberian Federal University. Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

1.10

自引率

0.00%

发文量