Showing papers in "Minerals Engineering in 1991"

TL;DR: In this article, surface-sensitive techniques, such as XPS (ESCA), scanning Auger microscopy and analytical scanning electron microscopy, have been used to study the surface layers on metal sulphides as single minerals, mixed minerals, synthetic ores and real ores from eight Australian concentrator operations.

TL;DR: In this article, a review of the technologies used for processing steemaking flue-dust is presented, and four categories of dust have been identified and used in the discussion, namely carbon steelmaking dusts with a high, low, and intermediate non-ferrous metal content, and dust obtained from stainless steelmaking.

TL;DR: There has been considerable interest in recent years in the development of automatic systems for the measurement of mineral composition and texture to help solve mineral processing problems as mentioned in this paper, which rely on three major operations: automatic identification of the minerals, the creation of an image representing the mineral sample and, finally, the analysis and measurement of the resulting image.

TL;DR: In this article, the present status of electrochemical studies in understanding sulphide mineral flotation is reviewed and an analysis of flotation in the absence and presence of collector is presented.

TL;DR: In this article, the authors reviewed the mineralogy of carbonaceous gold ores, the characteristics of the carbonaceous matter associated with gold and the mechanism of aurocyanide adsorption by carbonaceous material and activated carbon.

TL;DR: In this article, the interaction of oleate with salt-type mineral surfaces has been summarized based on adsorption, infrared and zeta-potential measurements, and it was shown that the monolayer coverage correspond to a condensed state of OO with a molecular coverage area of 33 A 2 (liquid-crystal state).

TL;DR: The history of sorting in the minerals industry is reviewed and the factors which led to sorting's minor role in the industry are discussed, and prognosis, both pessimistic and optimistic, are presented.

TL;DR: A review of the existing techniques and operations that are being used for the treatment of refractory gold ores, with particular emphasis on the techniques that are well established, such as Roasting and Pressure Oxidation, together with the developing technology of Biological Oxidation can be found in this article.

TL;DR: In this paper, the state of the art in processing and extraction of gold is reviewed and two different extraction schemes on treating refractory ores, namely pretreatment followed by gold leaching and direct leaching, are discussed.

TL;DR: In this article, Ammtec has been involved in numerous refractory gold projects and has presented some of the results from these process development programmes, as well as a careful metallurgical evaluation program based on good sampling, process mineralogy and testing various processing options; eg UFM, biological oxidation, pressure oxidation, roasting, etc.

TL;DR: The Jameson flotation cell was developed jointly by Mount Isa Mines Limited and Professor G.J. Jameson of the University of Newcastle as mentioned in this paper, and has been used in a number of cleaning applications within Mount Isa mines Limited, and other mines within Australia.

TL;DR: This article reviewed the results from some key investigations and presented the effect of grinding media types on flotation of specific minerals, and introduced some possible mechanisms and presents the effect on specific minerals.

TL;DR: In this article, the floatability and surface properties of naturally hydrophobic solids, including mainly graphite, are discussed from a surface-chemical viewpoint, and general aspects of graphite flotation are briefly explained.

TL;DR: A pattern of development has emerged for flotation control systems as mentioned in this paper, where stabilizing control must precede optimization, and the focus has shifted to a range of increasingly sophisticated approaches to achieve stabilization by the use of various model based control strategies.

TL;DR: In this article, the primary fluid flow profile and the secondary circulation on spiral troughs are summarised and revised equations for calculating the flow velocities are presented, and a suitable correlation technique is proposed and applied to preliminary results from a fundamental study of the behaviour of individual size fractions of glass spheres and quartz sand.

TL;DR: In this article, the status of column scale-up concerns is assessed, with particular emphasis on recent measurements of froth zone performance, and some performance comparisons between column and column/mechanical cell cleaning circuits are made.

TL;DR: In this paper, the subject of inter-facing plant grinding and flotation operations is addressed and the authors make use of mineral distribution by size in the grinding circuit product combined with size-recovery performance of the flotation circuit.

TL;DR: In this article, the results of extended trials carried out with the Mine Scale Multi-Gravity Separator (MGS) treating tin, chromite, celestite and magnetite fines are presented.

TL;DR: In this article, the wear in the vortex finders of the heavy medium separation (HMS) cyclones of Argyle Diamond Mines (ADM) has been investigated using both numerical simulation and experimental measurements.

TL;DR: In this paper, the authors studied the effect of diaminopropanes and n-dodecylamine collectors on the flotation of quartz as a function of pH.

TL;DR: In this paper, the optimization of the bacterial oxidation of an extremely refractory arsenical gold sulphide concentrate, from Olympias, Greece, is examined, in order to determine the effect of the variation of the particle size of the concentrate during bacterial leaching tests on the degree of pyrite and arsenopyrite oxidation for a pulp density range varying between 5 and 30% w/v.

TL;DR: In this paper, the effects of several variables on the performance of a shaking table have been investigated on a laboratory-scale Wilfley table using a synthetic mixture to represent a typical industrial metallic ore.

TL;DR: A review of the methods that have been researched to enhance mineral liberation by directing comminution energy to grain boundaries in order to promote intergranular rather than transgranular fracture can be found in this paper.

TL;DR: The use of microorganisms in flocculation or flotation of minerals, remediation of organics potentially discharged from mineral engineering operations, removal of heavy metal ions from dilute aqueous streams, degradation of cyanide, the recovery of bitumen from heavy oil reservoirs and tar sands and the solubilization of lignites and low rank coals.

TL;DR: In this paper, the effect of feed size, closed side setting and rock strength on the power consumption and product size of a cone crusher was examined and the predictive equations were presented as a series of three dimensional graphs.

TL;DR: The literature involving the practice aspects of electronic sorting in the 70s and 80s is reviewed in this paper, where the areas covered are radiometric sorting, X-ray sorting, optical sorting, sorting based on elec...

TL;DR: In this article, the use of industrial minerals as in-situ amendments have been developed to control and ameliorate the conditions in metalliferous spoil, which can result in an enormous decrease in this contamination, however the release of toxic elements into solution prevents the establishment of vegetation.

TL;DR: In this paper, it was shown that the collector bond is not sulphur-to-metal, but rather sulphur to sulphur, and the amount of collector adsorbed is such that at the optimum flotation conditions, bubble contact angle values are zero, or minimal.

TL;DR: In this paper, a closed circuit test with a 140mm diameter dense medium cyclone operated at less than 1.3 Relative Density (RD) using fine magnetite medium and density tracers has established the following effects of increasing the underflow to overflow diameter (U/O) ratio above approximately 0.82.

TL;DR: The flotation of pyrite is of great importance to the gold mining industry in South Africa and Australia as mentioned in this paper, with particular attention being given to the differences in the physical and chemical operating parameters, different circuits used on existing plants and the application of new cell technologies and flotation reagents.