Showing papers in "International Journal of Mineral Processing in 1979"

TL;DR: In this article, a modified Hallimond tube cell was used for chalcopyrite flotation, in which the potential at the mineral-solution interface was controlled potentiostatically.

TL;DR: Combining boundary layer theory and experimental data for the pressure distribution and boundary layer thickness over the surface of a sphere, the following expression was obtained for the drag coefficient: C D = 1+ 9.06 R e 1 2 2 Using this formula as a basis, an expression was developed for relating the settling velocity of spherical particles to their diameter at any value of the Reynolds Number as mentioned in this paper.

TL;DR: In this paper, an exact expression for the fraction of particles of mesh size D that contain less than a prescribed fraction of any particular mineral was derived by using the distributions of linear intercept lengths of the minerals in the ore. No other statistical information regarding the mineral grain sizes is required.

TL;DR: In this paper, it was shown that the oxidation-reduction state of the flotation pulp can have a pronounced influence on mineral floatability, and that the floatability of chalcocite and cuprite is strongly pH dependent.

TL;DR: In this article, an equation for the settling velocity of a suspension of spheres was developed based on a previous work by the authors, and the final equation was tested against experimental results of numerous investigators giving a mean square deviation of 0.0010.

TL;DR: In this article, the uptake or adsorption of copper, nickel and cobalt by finely divided oxide solids in aqueous ammoniacal medium has been investigated experimentally in order to determine how adsorptive on leach residues can affect the recovery of leachable metals.

TL;DR: In this paper, a mathematical model for the induration of iron ore pellets on a moving grate has been described, both for the performance of an operating plant and for the firing of pellets in a laboratory pot grate furnace.

TL;DR: In this paper, a number of flotation circuits for the recovery of poorly floating coal were investigated by laboratory batch testing and the results showed that the circuits which would allow an equitable distribution of collector between the coarse and fine size fractions were superior.

TL;DR: In this article, a three stage flotation with a sulphide ion-selective electrode (ISE) was studied for lead-zinc-silver dump material and a decant wash was sometimes used between sulphide flotation and sulphidization.

TL;DR: In this article, the adsorption of PAA on TiO2 from aqueous solution has been studied at 25°C as a function of pH, and it was found that polymer adhesion decreases with increasing pH up to pH 3, and can be described by a Langmuir-type isotherm.

TL;DR: In this article, the process of dewatering incompressible filter cakes by vacuum pumps which cannot maintain vacuum (low capacity suction systems) has been examined experimentally, and a theoretical model is proposed for interpretation of the results.

TL;DR: In this paper, a technique is presented by which the cut size of a classifier can be estimated without size analyses of the coarse and fine products using the corrected solids recovery and the classifier feed size distribution.

TL;DR: In this paper, the adsorption of copper ions on synthetic sphalerites of various iron contents was measured using a radiotracer technique, and the correlation of Cu 2+ ions adsoreption with the pH of solution, the iron content of the solid and the degree of surface oxidation of synthetic Sphalerite was determined.

TL;DR: The effect of Cu(II) ions on the froth flotation of ZnS in the absence of any collector has been studied in a Fuerstenau microflotation cell as discussed by the authors.

TL;DR: In this paper, the authors show that apatites and calcite are floatable with dodecylamine chloride (DDACl) and the possible mode of DDACl adsorption is due to Coulombic and Van der Waals forces.

TL;DR: In this paper, the dynamic dewatering model is extended to systems where the total pressure loss across the cake is constant (that is de-watering is effected by a pump which is able to maintain the vacuum).

TL;DR: In this article, the effect of surface active reagents on the wet-grinding of ores has been investigated with the help of data obtained for flocculation and zeta potential of corresponding quartz/amine systems.

TL;DR: In this paper, the effect of three hydrophilic nonelectrolytes on the flotation of ZnS has been studied using a Fuerstenau microflotation cell.

TL;DR: In this paper, a recarbonization process for separating magnesium carbonate and calcium carbonate from dolomites/dolomitic limestones is described. But the results indicate that, under optimum conditions, both objectives can be fulfilled by the recarbonation process.

TL;DR: In this article, the application of the ML-method is demonstrated by estimating parameters in a ball mill-hydrocyclone grinding circuit from flow and density measurements, and the model with the estimated parameters is used to determine the time propagation of mill contents and size distribution.

TL;DR: In this article, the authors used a fluidized bed that contains inert particles to dry slurries of sodium chloride, limestone, clay, and a 50 - 50 wt.% mixture of clay and limestone.