Showing papers in "Minerals Engineering in 1988"

TL;DR: In this article, a tentative model is presented to predict column carrying capacity (Ca) as a function of particle size (d80) and particle density (ϱ p : C a = 0.068 (d 80 × ϱ p ).

TL;DR: Chromite is an important strategic mineral and its deposition, mineralogical properties, and beneficiation are briefly reviewed in this paper, where the authors discuss its application in mining and mining.

TL;DR: The role of copper sulphate in the flotation of pyrite has been studied in this paper, and the results showed that in correct dosages it was able to increase both grades and recoveries.

TL;DR: In this article, a reverse flotation method was proposed to reduce entrainment in coal flotation by simultaneous flotation of the ash and depression of the coal using cationic amine surfactants.

TL;DR: In this paper, the interaction of an oxidised starch with natural haematite has been investigated through adsorption studies, X-ray photoelectron and FTIR spectroscopic techniques.

TL;DR: In this article, the results of investigations on the extraction of molybdenum from a low grade Indian molybenite concentrate using lime roasting were presented, and the results showed that the recovery of 99% was achieved when a charge containing slaked lime to concentrate ratio of 0.875 was roasted at 550°C for 1 hour and the calcine was leached twice each with 2N H 2 SO 4 at 80-90 °C for 2 hours.

TL;DR: In this article, the slime fraction of the run-of-mine ore of a lead-zinc concentrator has been studied and compared to the fundamental properties of the primary grinding circuit product and used to explain differences in flotation response during standard bench scale flotation tests.

TL;DR: In this article, pyrochlore recovery with a secondary amine type reagent is much lower in recycle water than in the other waters, which suggests that the precipitation of Ca ++ (as Ca oxalate) present in recycle waters leads to improved recovery.

TL;DR: In this article, the authors present plant-site evaluations of six feeds comprising very fine particles (80% passing sizes 8-23 μm). Five of the streams contained mainly sulphides, and one contained oxide minerals (Niobec, Canada).

TL;DR: In this paper, a 100mm dia × 2300mm high flotation column using coal fines from the coking coal washeries at Sudamdih, Patherdih, Kathara and Moonidih (India) has been shown that the performance of the column is superior to that of conventional cells with respect to the grade and recovery of the product.

TL;DR: In this article, the reduction rate of reagent grade SnO2 and Fe2O3 with solid carbon was investigated in the temperature range 973 to 1273 K, using a thermogravimetric method.

TL;DR: In this article, an electrochemical mechanism was proposed to explain the mineral-grinding media interaction and its effect on flotation, and the influence of the presence of collector during galvanic interaction as well as the effect of relaxation for fresh and galvanically interacted chalcopyrite samples were also studied.

TL;DR: In this paper, the authors developed a kinetic model for mineral liberation by grinding, which was extended to include two minerals with an arbitrary number of locked particle fractions, and demonstrated for the ball mill grinding of a copper ore in batch laboratory and continuous pilot plant mills.

TL;DR: In this paper, it was shown that the dissolution rate of cobalt is governed by a mixed kinetic control; i.e., diffusion through the alumina layer plus reaction at the interface are rate determining factors.

TL;DR: In this article, three samples of particle composites of known composition were measured in polished section using QEM ∗ SEM, an automated scanning electron microscope, and the results confirmed that a bias is associated with the measurements of the distribution of particle composition.

TL;DR: In this article, coal and graphite formed bulky agglomerates which were held together by heptane bridges, whereas the other materials formed aggregates which collected around and between oil droplets.

TL;DR: In this article, the surface mechanisms of loss of mass for coarse particles in wet autogenous grinding were investigated in batch experiments using tumbling mills of 0.75 and 1.75 m diameter.

TL;DR: An improved laboratory froth flotation cell has been designed which eliminates many of the inadequacies of previous cells, and also allows the study of froth effects in flotation as mentioned in this paper.

TL;DR: In this article, a dynamic model was fitted to the results of adsorption tests on these samples, using solutions of KAg(CN)2, and it was found that temperature, rather than the duration of regeneration, influenced the activity of the carbon.

TL;DR: In this article, different size fractions of coarse magnetite were floated in water in a monobubble Hallimond tube with an increasing dosage of sodium oleate (Na01), diethyl dixanthate ((EtX) 2 ), and hexadecane.

TL;DR: In this paper, the results of tests using vibration high-gradient magnetic separation for upgrading of china clays were described, and the results showed that the magnetic separation can be used to improve the performance of the clays.

TL;DR: In this article, it was shown that the pH of minimum solubility of carbonate minerals is not equivalent to the isoionic point of the mineral suspension, and that the minimum solution equilibrium of a carbonate mineral occurs at pH values higher than 10.4.

TL;DR: In this article, three methods were investigated for the extraction of cobalt, copper and gold from Kure pyrite concentrate: dead roasting, chloridizing and sulfating.