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Jiang H, Zhou Y, Zhang C. Interpretation of breakage characteristics of particle beds from confined compression tests. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2020.09.073] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
High-pressure grinding rolls (HPGR) have gained great popularity in the mining industry in the last 25 years or so. One of the first successful applications of the technology has been in iron ore pressing prior to pelletization. Piston-and-die tests can provide good insights on the material response in an HPGR. This work analyzed confined bed breakage of four iron ore concentrates under different conditions. Saturation in breakage of particles contained in the top size in the tests was observed to occur at specific energies of about 2 kWh/t, whereas full saturation in breakage, with no additional increase in specific surface area of the material, occurred at energies above about 6 kWh/t. An expression was proposed to characterize the propensity of a material to break under confined bed conditions. The phenomenology involved in confined bed breakage of such materials was then analyzed in light of the results.
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A pseudo-coupled DEM–non-linear PBM approach for simulating the evolution of particle size during dry milling. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2017.10.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Esnault V, Heitzmann D, Michrafy M, Oulahna D, Michrafy A. Numerical simulation of roll compaction of aerated powders. Chem Eng Sci 2013. [DOI: 10.1016/j.ces.2013.09.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Grof Z, Schoellhammer CM, Rajniak P, Štĕpánek F. Computational and experimental investigation of needle-shaped crystal breakage. Int J Pharm 2011; 407:12-20. [DOI: 10.1016/j.ijpharm.2010.12.031] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2010] [Accepted: 12/29/2010] [Indexed: 11/28/2022]
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The effects of feed size distribution on confined-bed comminution of quartz and calcite in piston-die press. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.minpro.2009.01.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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The characterization of structural changes in hematite ground in a confined particle bed using Rietveld analysis. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.minpro.2007.04.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Gutsche O, Fuerstenau D. Fracture kinetics of particle bed comminution — ramifications for fines production and mill optimization. POWDER TECHNOL 1999. [DOI: 10.1016/s0032-5910(99)00125-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Fuerstenau D, Lutch J, De A. The effect of ball size on the energy efficiency of hybrid high-pressure roll mill/ball mill grinding. POWDER TECHNOL 1999. [DOI: 10.1016/s0032-5910(99)00138-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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