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The film lifetime in MIBC and 0.1 M NaCl solutions was extracted from Wang and Yoon (2006). From the figure, the film stability is seen to enhance steadily with increasing MIBC concentration when the system contains 1 ppm PAX. This indicates that the higher MIBC concentration causes slower drainage.
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This article covers the importance, classification, characterisation and application of frothers in mineral flotation. Frothers are surfactants that adsorb at the …
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In this study, gangue only batch flotation tests were performed using fully liberated quartz in a 3.5 L conventional Agitair flotation cell, and the degree of entrainment was assessed at different frother concentrations using Dowfroth 250 and MIBC. Results show that the effect of frothers on the degree of entrainment was the consequence of ...
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2. Lime formulation, synthesis, and production2.1. Calcination. Quicklime (CaO) is produced from the calcination of limestone (CaCO 3), a sedimentary rock of mainly marine sediments containing calcium carbonates in a range of crystal forms.The chemistry and the physical properties of the originating limestone significantly affect the …
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Flotation is a highly efficient method for purifying low-ash coal particles from high-ash fine slimes. Herein, the dispersion effect of trisodium citrate dihydrate (TCD) on the reduction of slime coating on low-ash lean coal particle surface was studied using flotation tests, scanning electron microscope–energy Dispersive Spectroscopy …
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In this study, flotation tests in seawater were conducted to examine the effect of frother's dosage (MIBC) on the froth stability and flotation performance of low …
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Over the past few decades, the need to process more minerals while lowering capital costs has led to an increase in the size of flotation cells, e.g., 0.03 m 3 to 1000 m 3.
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This work aims to examine the effect of frother's dosage (MIBC) on the froth stability and flotation performance of low-grade phosphate ore in seawater. This research was motivated by the fact that phosphate flotation operations use a huge amount of …
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The reverse flotation tests revealed that dodecyl trimethyl ammonium bromide (DTAB), which is used as a collector for mineral matter and as a frother, generates froths …
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The use of alkaline pressure oxidation to pretreat refractory gold ore often results in insufficient gold recovery (<60%) in downstream thiosulfate leaching. To improve gold recovery, flotation was …
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The effects of AT and MIBC on cassiterite flotation have rarely been reported, which severely limits our understandings of the role of frother in cassiterite flotation.
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1. Introduction. Thin liquid films are basic units of s and emulsions that are found in a wide range of industrial applications such as food, medicine, firefighting and froth flotation (Karakashev and Ivanova, 2010, Pugh, 2016).One way to study thin films is by generating a single horizontal film and analysing it using the interferometric method …
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In this study, the effect of MIBC on C-matter flotation was investigated to understand the role of the frother in bubble and froth formation and on flotation kinetics. MIBC dosages between 30 and 150 g/t were used in combination with 500 g/t of kerosene as a collector. The results showed that the recovery and selectivity of C-matter were ...
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The molecular structure of the liquid–vapor interfaces of aqueous solutions of alkali metal halides and methyl isobutyl carbinol (MIBC, (CH 3) 2 CHCH 2 COCH 3) is determined by using molecular …
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The effect of coal rank (wettability) on flotation was extensively studied. Wheeler (1994) showed that while MIBC is an excellent flotation agent for easy-to-float bituminous coals, it looses quickly its effectiveness when used to float lower rank coals. In this latter case 2-ethyl hexanol was found to be much better.
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Figure 39, p.72: Effect of frother dose on yield, water recovery and ash content after 5 minutes of flotation, forward flotation of coal sample # 2 + fine silica. Figure 40, p.73: Effect of Diesel oil dosage on yield and ash content in clean product in the presence of 1. Ix 10"2g/L of MIBC, forward flotation of LS-20.
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The effect of a carboxylated polyacrylamide (PAM) of 11.9% of degree of anionicity on molybdenite flotation was previously reported. In this work the depressing effect of a polyacrylamide of 8.15% of degree of anionicity (LPAM) on molybdenite flotation under different conditions of mechanical degradation, pH, and concentration is …
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flotation reagents are used. Another application is separation of malachite and azurite ore using sulfidization flotation. Keywords. Flotation, surfactants, collectors, activators, depressants, metallurgy. 1. INTRODUCTION Froth flotation is a widely used metallurgical technique which is used in different fields like
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Flotation characteristics of molybdenite and talc are controlled by surface properties of their cleavage planes. Because the inherent hydrophobicity is common to the cleavage planes of both of these minerals, their separation by flotation is relatively more difficult compared to other mineral separation systems. Wettabilities of molybdenite and …
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The effect increased with ion valence and a correlation between gas holdup and ionic strength was demonstrated. Gas holdup for salt solutions with ionic strength ca. 0.4, as at the Raglan concentrator, is similar to that of ca. 10 ppm MIBC, which is a typical dosage for this common frother
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Conventional and ultrasonically assisted flotation tests of original and aged coal slimes were performed by using Montanol-531, a special coal flotation reagent, at variable dosages. The results of the batch flotation tests revealed that simultaneous ultrasonic treatment increased combustible recovery and lowered ash values of …
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In this study, the effect of MIBC on C-matter flotation was investigated to understand the role of the frother in bubble and froth formation and on flotation kinetics. MIBC dosages between 30 and ...
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On the other hand, the use of raw seawater can adversely affect the flotation of sulfides such as molybdenite (MoS 2 ) and increase lime consumption due to the buffering effect of seawater at high ...
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The effect of single frothers and their blends on bubble size, froth stability and unburned carbon (UC) flotation performance was studied. MIBC that produces smaller bubbles is efficient in ...
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In the concentration range used in flotation (10 −4 M, 10 ppm), MIBC offered limited resistance to coalescence with ... this study decoupled the effects of surface hydrophobicity and bubble characteristics modified by NaCl on chalcopyrite flotation and also considered the effect of NaCl on the true floatability by removing the effect of ...
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DOI: 10.1016/j.powtec.2019.12.058 Corpus ID: 212899018; Effect of diesel on the froth stability and its anti mechanism in fine coal flotation used MIBC as the frother @article{Xu2020EffectOD, title={Effect of diesel on the froth stability and its anti mechanism in fine coal flotation used MIBC as the frother}, author={Mengdi …
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For oxidized coal flotation, pine oil is shown to give the better recovery from a selection of common frother reagents among MIBC, pine oil and a polyglycol synthetic frother [17]. …
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The alcohols (such as MIBC) give relatively large change in gas hold-up with increasing frother concentration but little change in stable froth height in comparison to polyglycols …
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75 µm) . The conditioning time was 5 min and flotation time 10 min. The froth phase was studied by measuring the maximum froth layer thickness in a laboratory flotation cell so modified that it operates without discharge of concentrate. The LA-500 Agitair flotation cell with a volume of 2.7 dm3 was adapted for the
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The molecular structure of the liquid–vapor interfaces of aqueous solutions of alkali metal halides and methyl isobutyl carbinol (MIBC, (CH3)2CHCH2COCH3) is determined by using molecular dynamics simulations with polarizable force fields for the first time. The salts are chlorides, and iodides, some of which are found in raw and partially …
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Currently, the nonionic mixed surfactant is widely employed as the frother for fine coal flotation. In this study, we focused on examining the properties of a …
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In general, frother and collector are used as reagents to obtain an optimum condition in flotation processes. In this study, the effect of methyl isobutyl carbinol (MIBC) frother and potassium amyl xanthate (PAX) collector on the relative permittivity value using 2-electrode capacitance sensor was conducted.
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The flotation collectors have a great effect on the flotation process of oxidized coal. ... and aged coal slimes were performed by using Montanol-531, a special coal flotation reagent, at variable ...
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Highlights We study the effect of chain length of xanthate on the flotation performance of a nickel ore. Two methods were used to eliminate the adverse effect of serpentine slimes. When HIC is used, the xanthate with shortest hydrocarbon chain produces the best result. When Calgon is used, the xanthate with longest hydrocarbon …
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Section snippets Materials. The surfactant, Methyl isobutyl carbinol (MIBC), supplied by Alfa Aesar (99% C 6 H 14 O, Product No. A13435), was chosen for this study as it is widely used in flotation plants. Moreover, MIBC can improve the stability of bubbles and has little effect on the wettability of graphite surfaces (Miller et al., 1983).
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2.1. Effect of Collector Concentration on Flotation Recovery. Xanthates are the salts of xanthic acid (alkyl/aryl dithiocarbonic acid) and are formed through the replacement of two oxygen atoms in carbonic acid by sulfur and replacement of one hydrogen atom by an alkyl/aryl group. 22 They are commonly used as a standard …
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