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Showing 1 to 20 of 29 for “"Froth Stability"”.
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Effect of particle properties on froth stability
The froth flotation process has found substantial usage in the mineral processing industry for over a century and as long as minerals continue to exist in the earth's crust, the demand for upgrading and recovery of these natural yet valuable resources will continue to exist. It relies on the …
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Scale-up behavior of the froth stability measurement
Froth flotation is a widely used physio-chemical separation method in the minerals processing industry. Two distinct phases are present, namely: the pulp and froth phase. Flotation research has heavily focussed on the pulp performance; however only recently it was found that the froth performance …
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The effect of copper sulphate on froth stability
Froth flotation is a mineral beneficiation process implemented in the recovery of valuable minerals from unwanted gangue material. Copper sulphate is used as an activator in the flotation of base metal sulphides (BMS) as it promotes interaction of collector molecules with the mineral surfaces. It …
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Investigation of the effect of particle size on froth stability
… air bubbles rising from the pulp phase into the froth phase and subsequently collected to the launder. The stability of the froth phase which is be defined as the ability of bubbles to resist coalescing and bursting (Triffet & Cilliers, 2004), has been shown to have a significant effect on the …
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Considering the effect of pulp chemistry during flotation on froth stability
… pulp phase chemistry has a strong effect on the froth phase and therefore it is necessary to investigate how the manipulation of pulp chemistry factors can improve flotation performance. Research into the manipulation of this chemistry is well underway and factors including the pulp potential …
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The use of machine vision to describe and evaluate froth phase behaviour and performance in mineral flotation systems
Within froth flotation, it is widely acknowledged that froth stability affects flotation performance. As a result, it is expected that through the effective management of froth stability, it would be possible to both control and optimise a flotation cell and bank. However, for this to be possible, …
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Investigating the effect of frother type on froth structure, froth recovery and entrainment
… exist and one such important process is froth flotation. The flotation process involves the transportation of valuable minerals of a hydrophobic nature into the froth and to the concentrate launder. This hydrophobicity may be natural or imparted by a collector. Froth structure is …
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Recirculated Process Water in the Flotation of Sulfides
… of the flotation performance of sulfide ore. Froth stability is the ability of the foam to resist bubble coalescence and bubble bursting and is an integral property of the pulp with implications for flotation recovery and selectivity. This study investigates the impact of a change in water …
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The implications of froth structure and surface appearance for flotation performance
… separation efficiency and, in particular, the froth zone in flotation. The novel contribution of the work is in terms of demonstrating the importance of solids in governing the froth stability and hence the froth structure. Further, it has been propsed that the two most important factors that …
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The effect of electrolytes on the flotation of pyrite
… of any ions is necessary to stabilize the froth and thus produce a reasonable recovery of pyrite. In the absence of ions a "dry froth" is formed which results in a decreased mass pull and thus a low pyrite recovery. The predominant effect of an .increased concentration of univalent ions was …
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Developing a relationship between ore feed grade and flotation performance
… the impact of varying ore feed grade(s) on froth stability, gangue recovery and flotation performance using different water qualities. Ionic strength of plant water is defined as water quality in this study. As a means to better understand the impact of varying ore feed grade and water …
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Investigating electrolyte-reagent-mineral interactions in response to water quality challenges in the flotation of a PGM ore
Froth flotation is a physicochemical process that enables the separation of valuable minerals and unwanted gangue minerals contained in an ore. It utilises the differences in surface properties of the minerals to be separated. Among other factors affecting flotation, water is a major factor as it …
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Investigation of the effect of different frother blends on the flotation of selected PGM bearing ores
… minerals present in the ore by reducing the stability of the froth. In order to counterbalance the negative effects of depressant addition, frothers are normally added. The optimum frother provides a balance between the pulp kinetics and the froth recovery (through the effect of the frother …
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A comprehensive study of the electrochemistry and floatability of pyrite in coal flotation
… hydraulic entrainment of pyrite particles into froth product, and incomplete liberation of pyrite from coal that results in composite coal-pyrite particles, i.e., middlings. The present study was undertaken to address problems associated with these recovery mechanisms of pyrite and develop …
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The interactive effect of depressant type and dosage with frother dosage in the flotation of a PGE ore
… hydrophobic talc minerals cause over stable froths. The drainage of liquid and entrained particles is reduced thus the recovery of other gangue minerals by entrainment increases and grade decreases. In the rougher float depressants are added to produce a manageable froth and improve the grade …
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An investigation into the effect of potential modifiers on the flotation of a copper sulphide ore
… Eh values for each modifier. Batch flotation and froth stability tests were carried out at the ore’s natural pH whilst varying Eh. The dynamic stability factor (Σ) was used to quantify froth stability. Electrochemical techniques have been considered as an appropriate approach in the study of …
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The role of hydrocarbon oils in coal flotation : an investigation in to some pulp phase sub-processes
… of aromatic and aliphatic oils; MIBC was the frother. Oil dispersions were analyzed using a Coulter Counter. All the oils were sufficiently dispersed for effective flotation, with aromatic oils being better dispersed. MIBC usually hindered oil dispersion. The kinetics and extent of oil …
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A study of floatation froth behavior
… a better understanding of the role of the froth phase in coal flotation, froth stability measurements have been conducted using a continuous flotation cell. The results indicate that the mass flow rate of coal or mineral matter reporting to the product is linearly related to the flow rate …
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Investigation of the effect of hydrocarbon spillages and their interaction with alteration minerals on the flotation of UG2 PGE ore
… in which the key interests were on column froth stability, rheology, and oil adsorption tests. These were performed to understand the mechanism(s) leading to the reduced flotation performance. Quantitative evaluation of minerals by scanning electron microscopy (QEMSCAN) was utilized to …
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Investigation of the surface properties of gangue minerals in PGM bearing ores
… Group Minerals (PGM) and associated sulphides by froth flotation from the Bushveld Igneous Complex is complicated by the presence of naturally floatable gangue minerals such as talc. Although talc is present in small quantities it has a disproportionate effect on concentrate grade by enhancing …
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