Results 91 to 100 of about 2,770 (227)
Distribution, analysis, and recovery of fine gold from alluvial deposits [PDF]
, 1973 The United States Bureau of Mines, in its Heavy Metals Program, desired to have research performed to determine the size-frequency distribution and possible economic value of gold particles in the fine size ranges of Alaskan placer deposits.
Cook, D.J., Rao, P.D.
core
The development of regrind–flotation pre-treatment of the CIL feed in copper–gold plants [PDF]
, 2014 This study focused on the development of a new method, regrind-flotation pre-treatment, to improve the performance of the CIL (Carbon-in-Leach) circuit at copper-gold concentrators.
Bradshaw, Dee +3 more
core +1 more source
Recovery of pyrite from copper tailings by flotation
Journal of Materials Research and Technology, 2019 Tailings that are generated in the copper concentrate production contain great amount of sulfide mineral, in particular pyrite. Pyrite in contact with water and oxygen might oxidize spontaneously and originates a serious environmental problem.
Mario Santander, Luis Valderrama
doaj +1 more source
Frother-Assisted Flotation of Different Origin Pyrites
Inżynieria Mineralna, 2019 Hallimond tube flotation of different origins pyrites (coal-derived, Rio Tinto and Huanzala) and copper –bearing shale, having dif - ferent hydrophobicities determined by contact angle, were investigated in water and aqueous solutions of butyl diethylene glycol ether.
Kamil MILEWSKI, Jan DRZYMALA
openaire +1 more source
The effect of hard coal density on its flotation performance [PDF]
, 2005 Hard coal flotation depends on many factors, one of which is the density of the grains floated. The heavier the grain, the greater the gravitational force that counteracts the force of adhesion between the grain and an air bubble, and the lower the ...
Ewa Małysa
core
Current applications of micro - organisms in the leaching of copper and gold from chalcopyrite low grade ores [PDF]
, 2004 The conventional flotation technologies cannot provide fair results when applaid to very low grade ores or to "refractory" ores. This class includes intimate and nonuniform mineral associations, with partialy oxidized minerals and high secondary mineral ...
Krstev, Boris
core
Estimation of Bubble Size and Gas Dispersion Property in Column Flotation
SeparationsThis study investigates bubble size measurements, bubble characteristics, and the relationship between key operating variables and gas dispersion properties in column flotation.
HyunSoo Kim, Chul-Hyun Park
doaj +1 more source
A Preliminary Study of the Benefication of Montana Kyanite [PDF]
, 1948 This investigation is a preliminary study of the beneficiation of Montana kyanite, and while preliminary in degree the information gained may serve as a guide for the eventual exploitation of this Montana ...
McCarthy, Donald Paul
core +1 more source
Enhanced lifetime of methane bubble streams within the deep ocean [PDF]
, 2002 We have made direct comparisons of the dissolution and rise rates of methane and argon bubbles experimentally released in the ocean at depths from 440 to 830 m. The bubbles were injected from the ROV Ventana into a box open at the top and the bottom, and
Clift +24 more
core +1 more source
Results in EngineeringCoal is South Africa’s main energy source, with increasing demand for high-quality products requiring upgrading of low-grade coal fines through flotation.
Nomsa P. Baloyi, Joseph M Nseke
doaj +1 more source