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Filters: Department: "Metallurgical Engineering" School Or College: "College of Mines & Earth Sciences" Collection: "ir_uspace"
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CreatorTitleDescriptionSubjectDate
1 Miller, Jan D.; Deo, Milind; Lin, Chen-LuhDistribution of multiphase fluids in porous media: comparison between lattice Boltzmann modeling and micro-x-ray tomographyA parallel implementation of the three-dimensional Shan-and-Chen multicomponent, multiphase lattice Boltzmann method (LBM) was used to simulate the equilibrium distributions of two immiscible fluids in porous media. The simulations were successfully validated against cone-beam x-ray microtomographi...Multiphase fluid flow; Porous media; X-ray microtomography2008-02
2 Miller, Jan D.Evaluation of a CT-based coal washability analysis system under simulated on-line conditionsThe appropriate software and hardware necessary to adapt an X-ray CTanalyzerfor the determination of coal washability was developed and successfully tested for well-characterized samples under laboratory conditions. Evaluation of the CT-based analyzer under simulated on-line conditions is also prese...Coal washability; Computer simulation; X-ray CT analysis2002
3 Miller, Jan D.; Lin, Chen-LuhScientific visualization in mineral and material processingScientific visualization is an ideal methodology for investigating complex phenomena that are characterized by large amounts of data. Furthermore, it is invaluable in the study of processes that evolve in time. Scientific visualization relies heavily on computer graphics, image processing and video...Air sparged hydrocyclone flotation; Ball mill grinding; Tomography; Computer graphics1993
4 Miller, Jan D.Reaction kinetics of bismuth dissolution from lead cake by sulfuric acid leachingLead cake, a zinc smelter flue dust residue, consists primarily of lead sulfate. Characteristic properties of lead cake were determined in order to aid the understanding of reaction mechanisms involved in bismuth removal from lead cake by sulfuric acid digestion. Sp gr (specific gravity) measuremen...Lead cake; Smelter flue; Lead sulphate; Bismuth; Sulfuric acid1978
5 Miller, Jan D.Direct three-dimensional liberation analysis by cone beam x-ray microtomographyLiberation of valuable minerals during size reduction is an important aspect of mineral processing technology. In practice, most quantitative information on liberation is based on the application of stereological theorems for the analysis of image data from two-dimensional polished sections. On th...Mineral processing; Cone beam x-ray; Microtomography1997
6 Miller, Jan D.; Lin, Chen-LuhOn-line washability analysis for the control of coarse coal cleaning circuitsIn view of the success of recent laboratory studies using X-ray computed tomography (CT) to determine coal washability and with the availability of high-speed CT systems, it now seems possible to design an on-stream washability system for the control of coarse coal-cleaning circuits. Design features...On-stream washability; CT analyzer; Coal washability1995
7 Miller, Jan D.Zinc-dust cementation of silver from alkaline cyanide solutions - analysis of plant dataThe direct recovery of precious metals from alkaline cyanide solution is frequently accomplished by the well-established Merrill-Crowe process involving zinc-dust cementation. This is particularly true for silver. Plant data from two operations are presented and analyzed in terms of intrinsic reacti...Zinc-dust; Silver; Alkaline cyanide; Merrill-Crowe1988
8 Miller, Jan D.High resolution X-ray microtomography based micro finite element analysis of mechanical properties of cellular materialThe macroscopic mechanical (elastic) properties of closed foams (ROHACELL) estimated from micro finite element analysis are reported in this paper. The complex 3D geometries of ROHACELL foams with different densities were analyzed using high resolution X-ray microtomography (HRXMT). The microstructu...2013-01-01
9 Miller, Jan D.Applications of X-ray computed tomography in particulate systemsX-ray computed tomography (CT) is an ideal technique for investigating the internal structure of multiphase materials in a noninvasive and nondestructive manner. CT technology used in conjunction with specialized algorithms and advanced computer facilities can be used to provide quantitative informa...Algorithms; Beam; Intensity1992
10 Miller, Jan D.; Lin, Chen-LuhFine coal washability-liberation analysis by cone-beam X-Ray microtomographyA new method based on cone-beam x-ray microtomography is described for direct determination of the three-dimensional liberation spectrum of multiphase particles 100 microns in size or less. Such a technique may provide the basis for more detailed and accurate washability analysis in fine coal chara...Spectrum; Sink-float; Density1996
11 Miller, Jan D.; Lin, Chen-LuhDevelopment of a PC, image-based, on-line particle size analyzerA PC, image-based, on-line instrument for measuring coarse particle size on a conveyor belt is under development. The hardware and software required to implement such a system are discussed, including the interface for the special image-acquisition hardware. The system concept is given with exampl...1993
12 Miller, Jan D.Cone beam X-ray microtomography - a new facility for three-dimensional analysis of multiphase materialsAs the techniques and resolution for three-dimensional spatial analysis have advanced in the last decade, it is now possible to map in detail the micro structure of multiphase materials in three-dimensional digital space. In this regard, three-dimensional X-ray microtomography offers a unique imagin...Cone beam X-ray microtomography; Three-dimensional analysis; Material characterization2002
13 Miller, Jan D.Three dimensional analysis of particulates in mineral processing systems by cone beam X-ray microtomographyIn general, X-ray-computed tomographic (CT) techniques are capable of providing three-dimensional images of the internal structure of opaque materials in a nondestructive manner. The unique cone beam geometry allows acquisition of all two-dimensional projections with only one rotation of the sample,...Cone beam CT; X-ray microtomography; Liberation analysis; Particle shape; Heap leaching; Exposure analysis; Coal washability2004
14 Rajamani, RajOnline SAG mill pulse measurement and optimization semi-annual technical progress reportThe grinding efficiency of semi autogenous milling or ball milling depends on the tumbling motion of the total charge within the mill. Utilization of this tumbling motion for efficient breakage of particles depends on the conditions inside the mill. However, any kind of monitoring device to measure...2006
15 Miller, Jan D.; Herbst, John A.Factors affecting droplet size distributions produced in dispersed phase mixersDroplet size distributions were determined by stabilizing in gelatin and measurement of the distributions by means of computerized image analysis. Several variables that affect droplet sizes were studied and the resulting size distributions were modeled via a population balance equation. Key paramet...Gelatin; Phases; Agitating1981
16 Miller, Jan D.; Lin, Chen-Luh3D analysis of particulates in mineral processing systems by cone beam X-ray microtomographyIn general, x-ray computed tomographic (CT) techniques are able to provide 3D images of the internal structure of opaque materials in a nondestructive manner. The unique cone beam geometry allows acquisition of all 2D projections with only one rotation of the sample thus providing for fast data acqu...X-ray microtomography; Liberation; Heap leaching; Exposure analysis; Coal washability2003
17 Chandran, RaviMicrostructure and thermal conductivity of thermal barrier coatings processed by plasma spray and physical vapor deposition techniquesThe temperature dependence of the thermal conductivity of multilayer coatings made by a plasma spray technique as well as some coatings made by physical vapor deposition (PVD) was investigated. The multilayer coatings consisted of a varying number of layers of AI2O3 and Zr02 stabilized by 8%Y203. Pl...Thermal barrier coatings; Multilayer coatings; Plasma spray technique1996
18 Miller, Jan D.Experimental evaluation of a mineral exposure model for crushed copper oresCopper mineral inclusions dispersed in crushed ore particles have a certain size distribution (grain-size distribution). For efficient heap leaching processes, the crushing plant should be designed and operated to crush the ore to an appropriate particle-size distribution so that copper mineral grai...Grains; Particles; Distribution2006
19 Miller, Jan D.A new cone beam X-ray microtomography facility for 3D analysis of multiphase materialsThree-dimensional x-ray microtomography offers a unique imaging capability. Spatial resolution on the order of ten microns can be achieved with the use of microfocus x-ray generators. Recently, a state-of-the-art, flexible cone beam x-ray microtomography system has been installed at the University o...2001-01-01
20 Miller, Jan D.Evaluation of plantwide control strategies for coal preparation plantsThe quality of cleaned products from coal preparation plants is often variable due to natural fluctuations in the washability characteristics of the plant feed. To combat this problem, many modern plants have installed on-line analyzers that provide feedback for the real-time control of product q...Circuit; Yield; Optimization2000
21 Miller, Jan D.; Herbst, John A.; Lin, Chen-LuhDevelopment of a multicomponent-multisize liberation modelThis paper is concerned with the development of a kinetic model for mineral liberation by grinding. Existing population balance size reduction models are extended to include two minerals with an arbitrary number of locked particle fractions. The validity of this approach to liberation modelling is d...Population balance; size reduction; liberation; grinding model1985
22 Miller, Jan D.Surface characterization and new tools for researchIn the selective separation of mineral phases by flotation, surface chemistry is the principal determinant of the average contact angle for a specific mineral phase in flotation pulp. The average contact angle is, in turn, the principal determinant of the bubble-particle attachment efficiency in th...Flotation; Minerals; Surface chemistry; Contact angle2007
23 Miller, Jan D.; Wan, Rong YuEnhanced ferric sulphate leaching of copper from CuFeS2 and C particulate aggregatesSignificantly faster leaching kinetics for ferric sulphate are achieved for particulate aggregates of CuFeS2 and C than for CuFeS2 itself. The effect of carbon particles upon the rate of dissolution of chalcopyrite has been increased by a factor of 4 (after 10 hours' leaching), depending upon the ...Reaction; Chalcopyrite; Electrochemical1984
24 Miller, Jan D.; Lin, Chen-LuhParticle size distribution for copper heap leaching operations as established from 3D mineral exposure analysis by X-ray microCTThe particle size distribution (PSD) for copper heap leaching is an important consideration in the design and operation of any copper heap leaching facility. High-resolution 3D X-ray microtomography (XMT) can be used for the direct determination of the percentage of exposed valuable mineral grains i...Particle size distribution; Leaching; X-ray microtomography2003
25 Miller, Jan D.Evaluation of a PC image-based on-line coarse particle size analyzerA PC image-based, on-line coarse particle size analysis system is being developed for the control of crushing and grinding circuits. Initial results had indicated that the system is accurate when tested with irregularly shaped particles which are stationary and do not overlap with each other. Now th...Sampling; Measurements; Analysis1993
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