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Method for Predicting the Strength of Pellets Produced from Dry Fine-Grained Materials

  • POWDER METALLURGY INDUSTRY AND MANAGERIAL ECONOMICS
  • Published:
Powder Metallurgy and Metal Ceramics Aims and scope

The mechanisms of phase interactions in granular media were studied to elaborate the results obtained previously at the Nekrasov Iron and Steel Institute of the National Academy of Sciences of Ukraine to establish analytical methods for predicting the strength acquired by compacts produced from fine-grained materials. This allowed the development of theoretical ideas on the adhesive bonds formed in pellets to propose local models of adhesive processes for two basic particle interaction schemes: ‘particle + particle’ and ‘particle + liquid phase + particle’. Types of adhesion processes occurring simultaneously, as well as their nature and combinations, were established for each local model. This provided grounds for selecting factors that governed the formation of adhesive bonds and indicators that determined the rate of their development. Experimental studies were conducted in laboratory facilities of the Nekrasov Iron and Steel Institute for assessing the nature and extent of influence exerted by the selected factors on the strength of compacts. The experimental results were used to establish analytical dependences to describe the strength as a function of integral indicators of adhesive bond formation, taking into account the pelletizing pressure. These dependencies underlay the proposed method for predicting the strength of pellets produced from fine-grained materials with zero moisture in the range of pelletizing pressures from 50 to 220 MPa. The proposed computational and analytical method allowed determining the strength of pellets with high accuracy. Thus, it can be successfully used to develop processes for the production of pellets and the development of compaction equipment. The proposed method may be developed further through the expansion of its capabilities by predicting the strength of compacts considering liquid bonding agents introduced into the starting charge.

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Authors and Affiliations

  1. Nekrasov Iron and Steel Institute, National Academy of Sciences of Ukraine, Dnipro, Ukraine

    S.V. Vashchenko, A.Yu. Khudyakov, K.V. Baiul & Yu.S. Semenov

Authors
  1. S.V. Vashchenko
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  2. A.Yu. Khudyakov
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  3. K.V. Baiul
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  4. Yu.S. Semenov
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Correspondence to S.V. Vashchenko.

Additional information

Translated from Poroshkova Metallurgiya, Vol. 60, Nos. 3–4 (538), pp. 148–159, 2021.

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Vashchenko, S., Khudyakov, A., Baiul, K. et al. Method for Predicting the Strength of Pellets Produced from Dry Fine-Grained Materials. Powder Metall Met Ceram 60, 247–256 (2021). https://doi.org/10.1007/s11106-021-00233-1

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  • DOI: https://doi.org/10.1007/s11106-021-00233-1

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