Design of Flotation Cells and Circuits
After almost 60 years of application in this country froth flotation is still by far the most important process for concentrating metallic ores as well as a number of nonmetallic ores including fluorspar, phosphate rock, and potash. Its use on iron ores and coal is increasing. In the metals groups the largest plants and the […]
Electrochemistry of Pyrite and its Significance in Sulphide Flotation
In spite of the importance of the presence of pyrite in the flotation of sulphide ores, not many studies have been made from the electrochemical point of view. It is generally recognized that the oxidation of sulphide minerals is one of the most important factors among those which affect the floatability of sulphide minerals. The […]
Stability of Lead Ethylxanthate in Aqueous Systems
In galena flotation, lead ethyl xanthate, Pb(EtX)2, is precipitated and is physically adsorbed in the form of multilayers on the chemically adsorbed first layer of Pb(EtX). The solid particles are coated with layers of Pb(EtX)2 in heterogeneous manner over surface areas possessing both anodic and cathodic character. It is anticipated that the mode of formation […]
Sphalerite Activation by Copper Sulphate-Cyanide Combination
The main constituent of the feed to the “Sulphide Section” (31 t/h), in the F. Sartori Plant (6000 t/d) of the Miniere di Monteponi(Sardinia), is the ore of the Campo Pisano – Funtanaperda Mine. Difficulties have always been experienced in the treatment of this ore, owing to the extremely fine Pyrite-Sphalerite intergrowth and to the […]
Solving Industrial Mineral Flotation Problems
Flotation was practiced by this and succeeding engineers to concentrate many of the non-metallic minerals available from Canadian resources. Experimentation, and some extensive experimentation. A number are still under investigation. A few have evolved into producing plants. The results obtained for some have been used to increase efficiencies in existing plants. Results for others have […]
Courier 300 On-Stream Analysis OSA
The Outokumpu Company’s Courier 300 System is a complete package that can be installed and handed over with the key. It includes the equipment needed for sampling and handling the slurries. It has been developed from the start to meet industrial demands. Obviously an on-line system must comply with far stricter standards than one designed […]
Surface Oxidation of Chalcocite
For sulfide minerals, the presence of dissolved oxygen in the water phase is an influencing factor for separation by flotation, Klassen and Mokrousov distinguish three stages of oxygen adsorption; namely, reversible adsorption, activated adsorption and, finally, surface oxidation. While contraversial, limited adsorption of oxygen is believed to improve the interfacial reactivity between collector and mineral. […]
Continuous Mechanical Froth Flotation Cell
The BSA and DRC models have been shown to offer excellent alternatives to the NDRC model, given previously in the literature (1) in predicting the dynamics of glass bead flotation. Since the TP model converged to unrealistic parameter values and gave the poorest data fit, the TP model is judged unacceptable for predicting continuous mechanical, […]
Adsorption Flotation Plagioclases
Sulfonate Collector Data on sulfonate adsorption by silicate minerals are very scarce in the literatures. The experiments were divided into two groups. The first group included the study of the flotation response of plagioclases as a function of pH and sulfonate concentration. This group also included the study of the effect of Ca(II) and Al (III) […]
Flotation Plant Simulation
Knowledge of the behaviour of flotation machines had developed and increased considerably over the last few years. Although much work remains to be done on the study of the fundamental processes that influence the collection of hydrophobic particles at an air-water interface, there is enough information to permit the building of realistic models of the […]