Showing papers in "Minerals Engineering in 2004"

TL;DR: In this article, it has been demonstrated that the strength development of pastefill depends on the physical, chemical and mineralogical properties of the tailings, the water chemistry and the amount of water and finally, the binder type and proportion.

TL;DR: In this paper, two methods have been evaluated for the synthesis of zeolites using a UK fly ash as raw material, one consisting of a conventional hydrothermal technique in which fly ash is mixed with NaOH solution, and the other comprises a combination of alkaline fusion of fly ash with Naoh prior to a Hydrothermal treatment, where the fusion product was mixed with water.

TL;DR: In this article, the performance of fungal biomass immobilized within a loofa sponge (FBILS) to remove heavy metal ions such as Pb(II), Cu(II) and Zn(II)) from aqueous solution was tested as a new biosorbent system.

TL;DR: In this article, natural iron ores were tested as adsorbents for the removal of arsenic from contaminated water, and the experimental data fitted the first-order rate expression and Langmuir isotherm model.

TL;DR: In this article, the potential of in-situ permeable reactive barriers (PRBs) to remove heavy metal ions from synthetic solutions simulating acidic leachates under dynamic flow conditions was evaluated.

TL;DR: The attenuation mechanism employed by HAP can be attributed to bulk precipitation with almost 95% removal of U(VI) in a very short time, regardless of the applied conditions as mentioned in this paper.

TL;DR: In this paper, the authors reviewed the thermodynamics and speciation of the Au(0/I/III) system on the basis of published data on disproportionation of Au(I) and solubility of gold metal and Au(III) salts.

TL;DR: Germanium is extracted by means of complex processes from zinc residues in particular which also contain metal values such as cadmium, gallium, and indium as discussed by the authors, and the largest consumers of germanium are Japan and the USA.

TL;DR: The paper presents the application of the developed 3D finite element code to hydrocyclone modelling and indicates the versatility and the effectiveness of the new approaches.

TL;DR: In this article, a 2 in. hydrocyclone is shown to be significantly asymmetric without precession, through both computational fluid dynamics (CFD) and experimental observation, and the application of full three-dimensional modelling is demonstrated to be essential.

TL;DR: In this article, the application of natural zeolites from clinoptilolite group for mercury removal from industrial effluents from copper smelter and refinery was discussed.

TL;DR: The application of flotation for the separation of plastic mixtures derived from post-consumer waste is relatively new, the earliest publications on this subject date back to the late seventies as discussed by the authors.

TL;DR: Methods of characterizing and recovering the platinum group minerals are reviewed in this paper, where a classification of platinum group mines (PGMs) ore types is briefly introduced, followed by the introduction of some representative PGMs.

TL;DR: In this article, the influence of polymer structure type on the flocculation and dewatering behavior of smectite clay dispersions has been investigated, showing that polyethylene oxide (PEO) displays a higher affinity and greater adsorbed density than PAM, consistent with the zeta potential data.

TL;DR: In this paper, the potential application of microwaves for the heating of a nickeliferous limonitic laterite ore ((Fe,Ni)O(OH)·nH2O) was investigated.

TL;DR: In this paper, the authors describe tools available for the analysis and optimisation of cement clinker grinding circuits using the Bond-based methodology as well as Population Balance Models (PBM) and show that the throughput of a closed grinding circuit can be increased by pre-crushing the clinker using the Barmac crusher.

TL;DR: In this paper, the nickel biosorption capacity of a Streptomyces rimosus biomass treated with NaOH (0.1 M) was studied in the batch mode.

TL;DR: In this paper, the authors describe various ways of extracting collision data from the Discrete Element Method (DEM) model and translating it into breakage estimates, taking account of the different breakage mechanisms (impact and abrasion) and specific impact histories of the particles in order to assess the breakage rates for various size fractions in the mills.

TL;DR: In this article, the basic oxygen furnace (BOF) sludge samples received from Dofasco Inc., have been characterized by a variety of methods such as X-ray diffraction, chemical analysis, particle size and scanning electron microscope and energy dispersive x-ray analysis.

TL;DR: In this article, the authors present an experimental study into the recovery by true flotation and by entrainment, of colloidal silica and alumina particles with a size range from 40 to 160 nm in diameter.

TL;DR: In this article, the dependence of the electrical tribocharge on the relative humidity of the atmosphere in which the process takes place was analyzed, based on a theoretical model regarding the charge transfer between two dielectric surfaces.

TL;DR: In this paper, it is shown that dextrin is as effective depressant of pyrite as cyanide, by enveloping the dixanthogen resulting from adsorption of xanthate ions.

TL;DR: In this article, a comparison between the University of Cape Town (UCT) device (capillary) and the McGill University bubble sizing method (imaging) was conducted on single bubbles to establish the accuracy of the techniques by comparing with a reference method.

TL;DR: The Nageswararao and Plitt model has been extensively studied in the literature over the past 30 years as mentioned in this paper, with the benefit of 30 years of hindsight, this paper discusses the assumptions and approximations used in developing these models.

TL;DR: In this paper, the pollution potential of pyrite and arsenopyrite was examined through tailings from a European gold mine, and the main objective of the project was to study the geochemical behaviour of the tailings both before and after their inclusion into a cementitious matrix.

TL;DR: In this article, the effects of pH, adsorbent dosage, contact time, initial Cr(VI) concentration and temperature on the adsorption of bauxite were investigated.

TL;DR: In this article, a quaternary ammonium salt (DTAL) has been shown to be efficient in the flotation of aluminum-silicates such as pyrophyllite, illite, kaolinite and chlorite.

TL;DR: In this article, a review article summarizes the progress in fundamental understanding and process development of the reverse flotation of Chinese diasporic ores and discusses effective collectors for clay gangue minerals and depressants for diaspore.

TL;DR: In this paper, the recovery of copper from reverberatory furnace slag utilizing flotation has been studied and the effective factors such as particle size, pH, the amount and type of collector and additives, and flotation time were examined.

TL;DR: In this article, the authors present test results that were used to validate a model and scale-up procedure of the high pressure grinding roll (HPGR) which was developed at the JKMRC by Morrell et al.