Showing papers in "International Journal of Mineral Processing in 1976"

TL;DR: In this article, a review of theories which have been proposed to explain the slower flotation rate of ultrafines, the effects of slime coating, and the flotation of slimes with cationic collectors is presented.

TL;DR: In this paper, the selectivity of galena flotation from a synthetic mixture with sphalerite and quartz and from a typical Broken Hill ore has been determined, and it was found that the relative flotabilities of coarse galena and sphaleite of intermediate sizes resulted in significant improvements in lead-zinc selectivity.

TL;DR: The formation of highly surface-active ionomolecular complexes has been suggested recently to be a phenomenon that governs the pH-dependence of hematite flotation using oleate as discussed by the authors.

TL;DR: In this article, the residual saturation of filter cakes which have been drained by vacuum has been measured and the effects of varying particle size, shape and distribution, type of wetting fluid and cake size have been assessed.

TL;DR: It has been found that previous aeration in water or heating in air of ilmenite greatly improved the flotation recovery of this mineral with oleic acid as discussed by the authors, due to the lower solubility of the ferric compounds.

TL;DR: In this paper, a summary of the general theory of sampling is given, which is a study of the numerous errors liable to take place in the course of its realization, including weighting errors, contamination of the sample by foreign material, and alteration of the critical characteristic to be measured on the final sample.

TL;DR: In this article, the power consumption of a flotation cell is measured as a function of impeller speed, rate of aeration, and solids concentration, and the power number and air flow number are used to correlate the data.

TL;DR: In this paper, a statistical method of taking into account all the data simultaneously, using computer programs, is introduced where weighting factors are used to specify the degree of confidence applicable to individual measurements, and the estimation method has been developed for both the linear case involving mass-flow data and a non-linear case, where process measurements in terms of mass flow, pulp density and size/assay distribution are available.

TL;DR: In this article, a linear polyacrylamide was modified to give a linear polymer containing 69% amide, 23% carboxylic and 8% hydroxamic acid groups, which selectively flocculates cassiterite from mixtures with quartz in aqueous suspensions at a pH between 3.5 and 7.

TL;DR: The effect of feed inlet diameter on the hydrocyclone behaviour was studied by changing inlets on the previously studied cyclones by confirming the design variables which affect the hydro cyclone performance are the inlet and outlet dimensions.

TL;DR: In this article, it was shown that the magnetic force on a highly-magnetic particle in a slurry is a strong function of the particle shape and the concentration density of the magnetic particles in the suspension.

TL;DR: In this article, the authors investigated the reaction between natural and sulphidized chrysocolla and potassium amyl xanthate in solution and found that the particles composed of the reaction products are spontaneously released from the surface of chyrscocolla giving rise to a colloidal dispersion.

TL;DR: The average physical characteristics of limestone, quartz, calcite and glass which are found in the literature are used in the formulas of these three mathematical models as discussed by the authors, and the calculated values of the new surface energies from these models are compared with experimental and theoretical values.

TL;DR: In this paper, the fraction of tracer retained in a laboratory flotation machine is measured as a function of time, simulating semi-batch testing, and the effect of changing the parameter values on the model response is discussed.

TL;DR: In this paper, the behaviour of different types of slurries is discussed under two main headings: homogeneous and heterogeneous, and the Bowen scale-up procedure is recommended for slurries which flow in a homogeneous manner.

TL;DR: The use of fluidized beds is being applied to a wide field of different metal and alloy treatment processes as discussed by the authors, and the problems associated with conducting the different processes are discussed, as well as some design considerations and the scale-up problem.

TL;DR: In this article, the main devices necessary for control in the mineral processing industries are presented and the authors outline the problems encountered when modeling such systems, and the principal control modes currently used are proposed as examples (feedforward and feedback control).

TL;DR: In this paper, a mathematical equation has been derived from which the optimum length of flow cell of a gamma density gauge can be calculated, which has been experimentally verified by conducting experiments on two flow cells of different lengths.

TL;DR: Several alternatives are available for processing low-grade copper ores, such as in-situ, heap, vat and agitation leaching, and may involve the conventional cementation step or the newly developed solvent extraction system as mentioned in this paper.

TL;DR: A portable multi-stream on-line analyser (PMSOLA) was presented at the Julius Kruttschnitt Mineral Research Centre, Brisbane, Australia as discussed by the authors.

TL;DR: In this article, the rotary-vacuum-filter capacities for coal concentrate treatment were investigated using a combination of laboratory and pilot-scale experiments. But it is not suitable to base filter design totally on laboratory data and it is essential that a suitable model of the eventual commercial machine is carried out with a suitable simulator.

TL;DR: In this paper, a series of experiments have been performed on hematite/limestone and cassiterite/wolframite separations and the authors have found that the optimisation of the feeding system and removal of the ultrafines (−10 μm) from the feed have both been viable methods for achieving good dry magnetic separations of fine mineral mixtures.