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dc.contributor.authorKim, Seunghee
dc.contributor.authorSantamarina, Carlos
dc.date.accessioned2017-01-02T09:28:32Z
dc.date.available2017-01-02T09:28:32Z
dc.date.issued2016-08-11
dc.identifier.citationKim S, Carlos Santamarina J (2016) Rock Crushing Using Microwave Pre-Treatment. Geo-Chicago 2016. Available: http://dx.doi.org/10.1061/9780784480151.071.
dc.identifier.doi10.1061/9780784480151.071
dc.identifier.urihttp://hdl.handle.net/10754/622459
dc.description.abstractCrushing and grinding are primary contributors to a high energy demand in the mining industry, yet, both are surprisingly inefficient processes, often with efficiencies as low as 1%. We analyze size reductions during crushing and grinding operations and explore the potential of multiplying internal weaknesses in rock materials by non-mechanical means. In particular, when rock blocks (wet or even dry if polycrystalline) are exposed to microwaves, internal cracks can develop along grain boundaries via differential thermal expansion between grains and volumetric thermal expansion of water in pores. Brazilian tests conducted on granite and cement mortar specimens show that the tensile strength decreases proportional to the duration of microwave treatment. Thermal changes, excessive fluid pressure buildup and induced stresses are analyzed in the context of hydro-Thermo-mechanically coupled processes. Results confirm that both differential thermal expansion of mineral grains and volumetric thermal expansion of water can generate cracks upon microwave exposure. Optimal conditions are suggested to lower the combined consumption of electric and mechanical energy.
dc.publisherAmerican Society of Civil Engineers (ASCE)
dc.relation.urlhttp://ascelibrary.org/doi/10.1061/9780784480151.071
dc.titleRock Crushing Using Microwave Pre-Treatment
dc.typeConference Paper
dc.contributor.departmentAli I. Al-Naimi Petroleum Engineering Research Center (ANPERC)
dc.contributor.departmentEarth Science and Engineering Program
dc.contributor.departmentEnergy Resources and Petroleum Engineering
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalGeo-Chicago 2016
dc.conference.date2016-08-14 to 2016-08-18
dc.conference.name4th Geo-Chicago Conferen Sustainable Materials and Resource Conservation, Geo-Chicago 2016
dc.conference.locationChicago, IL, USA
dc.contributor.institutionWestern New England Univ., 1215 Wilbraham Rd, Springfield, MA, United States
kaust.personSantamarina, Carlos
dc.date.published-online2016-08-11
dc.date.published-print2016-08-08


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