Comminution in confined particle beds by single compressive load

Oettel, W.; Nguyen, Anh-Dan; Husemann, K.; Bernhardt, Claus

doi:10.1016/s0301-7516(00)00066-1

Cited by 8 publications

(1 citation statement)

References 3 publications

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“…To study the different energy efficiencies between different crushing or comminution methods, Oettel et al (2001) carried out quasi-static compressive experiments on particle bed comminution. Their results show that: (1) the maximum growth of the specific surface area attained in the fully confined particle bed.…”

Section: Energy Efficiency In Comminutionmentioning

confidence: 99%

Energy Requirement for Rock Breakage in Laboratory Experiments and Engineering Operations: A Review

Zhang

Ouchterlony

2021

Rock Mech Rock Eng

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Based on the review of a wide range of literature, this paper finds that: (1) the average specific surface energy of various single crystals is only 0.8 J/m2. (2) The average specific fracture energy of the rocks with a pre-crack under static cleavage tests is 4.6 J/m2. (3) The average specific fracture energy of the rocks with a pre-cut notch but with no pre-crack under static tensile fracture (mode I) tests is 4.6 J/m2. (4) The average specific fracture energies of regular rock specimens with neither pre-made crack nor pre-cut notch are 26.6, 13.9 and 25.7 J/m2 under uniaxial compression, tension and shear tests, respectively. (5) The average specific fracture energy of irregular single quartz particles under uniaxial compression is 13.8 J/m2. (6) The average specific fracture energy of particle beds under drop weight tests is 74.0 J/m2. (7) The average specific fracture energy of multi-particles in milling tests is 72.5 J/m2. (8) The average specific energy of rocks in percussive drilling is 399 J/m3, that in full-scale cutting is 131 J/m3, and that in rotary drilling is 157 J/m3. (9) The average energy efficiency of milling is only 1.10%. (10) The accurate measurements of specific fracture energy in blasting are too few to draw reliable conclusions. In the last part of the paper, the effects of inter-granular displacement, loading rate, confining pressure, surface area measurement, premade crack, attrition and thermal energy on the specific fracture energy of rock are discussed.

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Section: Energy Efficiency In Comminutionmentioning

confidence: 99%