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Selective comminution of two-component mineral mixtures

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Conclusions

  1. 1.

    The main criterion which determines the effectiveness of selective comminution is the ratio between the energy of the grinding bodies and the energy required to break particles of the weak component of maximum size, and particles of the strong component of the minimum size. The maximum effectiveness of selective comminution is achieved in cases of operating with energy combinations (3), (11), and (13).

  2. 2.

    With selective comminution of a two-component mineral mixture in accord with energy combinations (3), (11), and (13) the relative comminution rate of the strong component increases uniformly, but it decreases for the weak component. Grindability of the strong component decreases in relation to individual grinding of it, but for the weak component it increases in relation to its individual grinding.

  3. 3.

    In order to describe comminution kinetics for mineral mixtures it is necessary to develop an equation which specifies the decreasing-increasing nature of the relative grindability of the residue, and an approximate calculation can be made using known equations which specify either a decreasing or an increasing nature for grindability of the residue.

  4. 4.

    The average size of the strong component particles affects the grindability of the weak component. With an increase in average size of strong component particles with a change-over from energy combinations (3) and (11) to combination (13) the comminution rate for the weak component increases.

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Literature Cited

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Authors
  1. A. L. Stepanov
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  2. S. F. Shinkorenko
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  3. A. V. Frolov
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  4. P. A. Kochetkov
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Additional information

IGKhS, Lyubertsy. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 3, pp. 35–41, May–June, 1991.

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Stepanov, A.L., Shinkorenko, S.F., Frolov, A.V. et al. Selective comminution of two-component mineral mixtures. Soviet Mining Science 27, 202–207 (1991). https://doi.org/10.1007/BF02500897

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  • DOI: https://doi.org/10.1007/BF02500897

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