Experimental research on the strength distribution of brittle spheres under compression

• Autorzy: Zhou Qiang , Guo Qing , Pan Yongtai , Zhu Changyong , Wei Yinghua

Identyfikatory

DOI

10.37190/ppmp/132479

• Języki publikacji: EN

Abstrakty

EN

The strength of a particle is one of the most crucial characteristics within a comminution process due to the mechanical stresses experienced by each particle. In this study, the K9 glass spheres and ceramic spheres were subjected to a breakage test. The test includes the breakage of up to 240 particles under compression to obtain the distribution of the breakage probability depending on the crushing force and breakage energy. The breakage test was conducted for five particle size fractions from each individual material. Thus obtained 10 crushing force distributions and corresponding 10 breakage energy distributions were fitted with lognormal distribution function. The parameters in the lognormal were analyzed including the effect of the material and particle size. Following this, the relationship between the crushing force and breakage energy was analyzed based on the Hertzian elastic contacts model and Tomas’s elastic-plastic contact model, respectively. Additionally, particle strength in terms of crushing force and breakage energy were compared and found to be size dependent. Finally, a simple transformation algorithm of distributions is developed. According to this algorithm the crushing force distribution can be transformed into breakage energy distribution and vice versa. The findings facilitate a better understanding of the particle strength distribution under compression and will help to improve the comminution process design, control and optimization.

Słowa kluczowe

EN

particle strength; breakage energy; crushing force; lognormal function; breakage probability

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2021
• Tom: Vol. 57, iss. 2
• Strony: 58--69
• Opis fizyczny: Bibliogr. 29 poz., rys., tab., wykr.

Twórcy

autor

Zhou Qiang

• China University of Mining and Technology Beijing, School of Chemical and Environmental Engineering, Beijing, 100083, China

autor

Guo Qing

• China University of Mining and Technology Beijing, School of Chemical and Environmental Engineering, Beijing, 100083, China

autor

Pan Yongtai

• China University of Mining and Technology Beijing, School of Chemical and Environmental Engineering, Beijing, 100083, China

autor

Zhu Changyong

• Shenhua Ningxia Coal Industry Group CO., LTD Taixi CPP, Ningxia Shi Zuishan 753000, China

autor

Wei Yinghua

• Shenhua Ningxia Coal Industry Group CO., LTD Taixi CPP, Ningxia Shi Zuishan 753000, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).