Batch scale laboratory testwork was conducted to evaluate collector and depressant addition on flotation performance of a nickel sulphide ore. The objectives of the study were to 1. develop an understanding of the effects of collector and depressant dosage, and its interactive effects, on flotation performance and 2.
This will cause the particles with small portions of mineral exposed to be able to be collected. Add enough collector and you will float the Titanic back to surface. High dosage of collector can undo any careful use of depressant you had used. The extra surface area also means a better contact being made between the collector and the air.
effect on grade and recoveries as dosages of flotation reagents are altered. The fast floating fractions are usually recovered earlier on in the flotation circuit whilst the slower floating
Investigating Ways of Improving Recovery of Slow Floating PGM Minerals at Zimplats Munyaradzi Mugadza (689462) The Factors Affecting Flotation Performance (Hay 2005)..21 Figure 2.6 Clean, intermediately and SFR and (b) Recovery Time Relationships with Depressant Dosage for Cleaner Feed Flotation
with an increase in depressant dosage for all ionic strength conditions. Further to this, it can be seen that with increasing ionic strength (at pH 9), the recovery of solids and water was higher compared to lower ionic strengths. Interestingly, at pH 11 an opposite trend was observed regarding the effect of ionic strength on solids recovery.
Abstract The effect of particle size on flotation performance of hematite and quartz was investigated. Microflotation, X ray photoelectron spectroscopy analysis, reagent adsorption measurements, and collision and attachment probability calculation between particle and bubble were conducted in
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flotation process, particle size of the sample is of primordial importance. This is determined on the basis of either the mineralogy and/or a careful design of laboratory flotation tests. The effect of particle size on flotation performance has been widely studied [1 6]. It is well established that the flotation
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high depressant dosage, 900 g/t, was necessary in order that a high weight recovery and a low iron content in the reject fraction were achieved. The enhanced flotation performance at pH 10,5 is in agreement with the industrial practice. The flotation process kinetics may be represented by the classic first order model.
Oct 01, 20120183;32;The effect of frother type and dosage on flotation performance in the presence of high depressant concentrations The effect of frother type and dosage on flotation performance in the presence of high depressant
In recent years, researchers have increasingly paid more attention to the effect of particle size on the flotation process. P233;rez Garibay et al. (2014) studied the effect on sphalerite flotation of the feed and bubble size distributions, superficial air velocity and collector dosage. Results showed that the recovery highly depended on these
Four of the most accessible levers for the control of flotation performance which are available to a plant metallurgist are frother and depressant dosage, air flow rate and froth height.
Depression is a brain disorder that can lead to much emotional anguish. Changes in how your brain functions also can have a big effect on your body. Is it any wonder, then, that depression
Depressant dosage has little effect on chromite recovery. Froth height, however, has more of an effect of chromite grade at low depressant dosages than at high depressant dosages. In the case of chromite grade, depressant dosage now plays a role in that the chromite grade increases as the depressant dosage increases.
The effect on flotation performance of various parameters such as pH, collector dosage, % solids and depressant dosage at different levels was investigated. Therefore, the main objective of the study was to optimize the process parameters for the flotation of base metals from a nickel copper sulphide ore. 2. Materials and Methods 2. 1.
depressant for zinc and selective flotation of lead minerals. The dosage of the depressant was varied from 0.215 kg/t. to 1.7 kg/t. The flotation results are graphically shown in Fig. 5. It is evident from the data shown in Fig. 5 that an increase in dosage of depressant from 0.215 kg/t. to
The effects of pH, dosages of collector, dispersant, depressant, solid concentration and impeller rotation on the performance of the reverse flotation of haematite were studied by Kumar, (2010). It was found that increase in pH and depressant dosage increases % yield and grade of the concentrate.
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Depressants also reduce the mass of solids reporting to the froth and can thus destabilise the froth. This effect on the froth can be mitigated by using higher frother dosages or water of higher ionic strength. Reducing chromite recovery is of critical importance since high levels may negatively affect the downstream smelting process.
effect of high cyanide dosage is the increased amount of copper sulphate required to activate the sphalerite in the zinc flotation circuit. Thus, an understanding of the mechanism by which cyanide controls the flotation of sphalerite is required before optimising the depressant dosage in the lead flotation circuit. 3.2.
The interactive effect of depressant type and dosage with frother dosage in the flotation of a PGE ore. Depression of stabilising gangue minerals such as talc decreases the froth stability and may also affect the recovery of valuables. Frothers are added to flotation systems to create stable froths.
The effect of clay binder dosage on flotation yield with five clay binders .. 57 Figure 4.15. The effect of clay binder dosage on flotation recovery with five clay binders
b) In case of direct flotation, required dosage of depressant for silicate minerals (sodium silicate in solution form) was added to the above and conditioned for three minutes. Later, sodium oleate as a collector was added to the system and further conditioned for three minutes. c) Collector of required dosage was added and conditioned for three
4.5.4 Overview of the effect of the recycle on column flotation for Series A, B and C 80 4.6 The effect of depressant dosage 80 4.6.1 The effect of depressant dosage on mass recovery of mechanical and column cell 80 4.6.2 The effect of depressant dosage on grade recovery of
When people overdose on a CNS depressant, their breathing often slows or stops. This can decrease the amount of oxygen that reaches the brain, a condition called hypoxia. Hypoxia can have short and long term mental effects and effects on the nervous system, including coma and permanent brain damage.
The use of high dosages of polysaccharide depressants in order to depress the undesired naturally floatable gangue (NFG) present in ores beneficiated from the Bushveld Complex, South Africa, results in a significant decrease in the stability of flotation froths.