Flotation Desulfurization of High-Sulfur Bauxite with Ethyl Thio Carbamate as Collector

2011 ◽  
Vol 239-242 ◽  
pp. 1515-1519 ◽  
Author(s):  
Xiao Min Wang ◽  
Ting An Zhang
Keyword(s):  
Particle Size ◽  
Sulfur Content ◽  
Ph Value ◽  
Experimental Results ◽  
Pulp Density ◽  
Flotation Kinetics ◽  
Flotation Process ◽  
Flotation Agent ◽  
Kinetics Of

The desulfurization of high-sulfur diasporic bauxite （from China） with flotation process and ethyl thio carbamate as collector was studied, and the effects of flotation time, pulp density, pH value and particle size of ores were examined. The experimental results indicate that the sulfur in bauxite was successfully decreased through flotation. The sulfur content of bauxite was lowed to 0.66% under the condition of pH value 4, the dose of flotation agent ethyl thio carbamate 0.5kg/t, frother 20g/t, flotation time 15 minutes, pulp density 10%, the particle size of ores ≦0.09 mm, and the reclamation of Al2O3is 90.16% as well. The flotation kinetics of flotation desulfurization was also studied.

Recovery of Silver from Zinc Acid-Leaching Residue by Flotation

2013 ◽  
Vol 392 ◽  
pp. 14-23
Author(s):  
Zhi Chao Yang ◽  
Ying Yong Ge ◽  
Yuan Long Zhang ◽  
Jun Li Zhao ◽  
Kun Zhu
Keyword(s):  
Ph Value ◽  
Influence Factors ◽  
Acid Leaching ◽  
Orthogonal Test ◽  
Pulp Density ◽  
Considerable Influence ◽  
Sodium Sulphide ◽  
Flotation Process ◽  
Flotation Recovery ◽  
Leaching Residue

Through flotation recovery of Silver (Ag) from Zinc acid-leaching residue (ZALR) was investigated in this study. The study adopted the single factor and orthogonal test reveal interactions among all considerable influence factors including sodium sulphide (SS) as regulator, ammonium butyl dithiophosphate (ABD) as major collector, GC as minor collector, interaction between ABD and GC, OC as flotation carrier, and pulp density. The experimental results show the flotation of the circuit composited of one rougher, one cleaner, one scavenger and middlings being back to the next rough flotation together is practical way and that the concentrate containing Ag 10890.0g/t, recovery77.43% can be obtained from the residue (Ag grade 340g/t). The optimum roughing flotation process is: the pH value of flotation pulp is 3.0~4.0, the pulp density is about 45wt.%, ABD dosage is 900g/t, GC dosage is 50g/t, OC dosage is 2000g/t, and BK201 dosage is 100g/t.

A novel multistage kinetic modeling of flotation for wastewater treatment

2013 ◽  
Vol 68 (4) ◽  
pp. 807-812 ◽  
Author(s):  
B. S. Ksenofontov ◽  
M. V. Ivanov
Keyword(s):  
Wastewater Treatment ◽  
Air Bubbles ◽  
Flotation Kinetics ◽  
Flotation Process ◽  
Multistage Model ◽  
New Model ◽  
Accurate Design ◽  
Flotation Treatment ◽  
Froth Layer ◽  
Kinetics Of

This study develops a new model for description of flotation kinetics. It defines flotation as a process that consists of several stages: separated air bubbles and particles, air bubbles and particles forming an aggregate, aggregate rising to the froth layer. This description significantly differs from known models, which are much simplified. The multistage model gives a novel in-depth description and considers different aspects of flotation, i.e. aggregate formation, which is critically important for flotation to take place. Experimental approval of the new model resulted in its accuracy. The model is to be used for a description of kinetics of all flotation processes in wastewater treatment. It helps in accurate design of flotation treatment plants and may be used for further research of the flotation process.

scholarly journals Treatment of produced water by induced air flotation: effect of both TWEEN 80 and ethanol concentrations on the recovery of PAHs

2018 ◽  
Vol 17 (2) ◽  
pp. 181-192
Author(s):  
Salima Chebbi ◽  
Atmane Allouche ◽  
Marian Schwarz ◽  
Souhila Rabhi ◽  
Hayet Belkacemi ◽  
...  
Keyword(s):  
Produced Water ◽  
Tween 80 ◽  
Binary Solvent ◽  
Air Flow Rate ◽  
Flotation Kinetics ◽  
Flotation Process ◽  
Oilfield Produced Water ◽  
Air Flotation ◽  
Kinetics Of ◽  
Collector Concentration

Abstract The present study investigates the application of induced air flotation (IAF) technique on PAHs (PAHs) removal performance from a real oilfield produced water of a separator cell. The quantification of total PAHs (PAHtot) was done using ultraviolet-visible spectrometry (UV-Vis) according to the naphthalene calibration curve. The UV-Vis spectra of naphthalene dissolved in a mixture of the binary solvent (water-ethanol) and the Tween 80 showed stability in the molecular orbital of C10H8. The use of small concentration of Tween 80 was revealed to be discrete in the quantification of PAHtot. The flotation process was improved at the critical micelle concentration of Tween 80 (CMC) of 2 % and the critical coalescence concentration of ethanol (CCC) of 0.5 mL/L for the PAHtot recovery of 49.76 % and the PAHtot content in the pulp of 50.24 %. At these concentrations, half of PAHtot was removed from produced water PW. Above the CMC and the CCC, the PAHtot recovery decreased and the PAHtot content in the pulp increased. It was found that there is a collector concentration at which the amount of water carrying from the pulp to the concentrate was increased and in parallel, the PAHtot recovery increased and the PAHtot content in the pulp decreased. Both of the CMC and the CCC have promoted the decrease on the conditioning time from 30 to 10 min and the flotation time from 20 to 6 min. Since the impeller speed and air flow rate were constant, the flotation of PAHs was limited. The flotation kinetics of PAHtot was described by the Higuchi model.

Effects of particle size and ferric hydroxo complex produced by different grinding media on the flotation kinetics of pyrite

2020 ◽  
Vol 360 ◽  
pp. 1028-1036 ◽  
Author(s):  
Xiaolong Zhang ◽  
Yuexin Han ◽  
Peng Gao ◽  
Yanjun Li ◽  
Yongsheng Sun
Keyword(s):  
Particle Size ◽  
Hydroxo Complex ◽  
Flotation Kinetics ◽  
Grinding Media ◽  
Kinetics Of

Influence of SDBS on Dispersive Stability of Al2O3 Nano-Suspenions

2008 ◽  
Author(s):  
Dongsheng Zhu ◽  
Xianju Wang ◽  
Xinfang Li
Keyword(s):  
Particle Size ◽  
Zeta Potential ◽  
Ph Value ◽  
Experimental Results ◽  
Dispersion Stability ◽  
Al2o3 Nanoparticles ◽  
Sodium Dodecylbenzenesulfonate ◽  
Electrostatic Repulsions

In this paper, the influence of sodium dodecylbenzenesulfonate (SDBS) on the dispersive behavior of Al2O3 nanoparticles in water are investigated by measuring zeta potential and hydrodynamic sizes of the nanoparticles in suspension at different pHs and different concentration of SDBS. The experimental results show that at different pHs the magnitude of zeta potential has very homologous relation with particle size, the higher magnitude of zeta potential values are, the smaller of the hydrodynamic sizes are, and the better dispersive stability of the nano-suspension is, and that an optimizing pH value of the nano-suspension can induce the highest magnitude zeta potential, then result in the best dispersion stability of the nano-suspension. It is also found that concentrations of SDBS can significantly affect the values of zeta potential and hydrodynamic sizes of the nanoparticles by electrostatic repulsions. Similarity, optimizing concentrations of SDBS can also lead to the highest enhancement of the dispersive stability of the Al2O3 suspension and the optimizing concentration for SDBS is 0.09% in 0.1% Al2O3 nano-suspensions, which have the best disperse results.

scholarly journals Particle size grouping method as a control system of efficiency flotation process on the example of coal

2020 ◽  
pp. 33-33
Author(s):  
Dorota Kalisz ◽  
Kamil Kuglin ◽  
Anna Młynarczykowska
Keyword(s):  
Particle Size ◽  
Fine Particles ◽  
Flotation Kinetics ◽  
Particle Volume ◽  
Initial Size ◽  
Flotation Process ◽  
Carbon Particles ◽  
Coal Particles ◽  
Total Particle ◽  
Size Of Particles

Agglomeration of coal particles during flotation can be analysed with the Particle Size Grouping (PSG) method. Numerous experiments were carried out to theoretically explain the effect of carbon particles agglomeration, but the result still remains incomplete. In this paper the PSG method was used to analyse agglomeration groups of carbon particles of initial size 100-400 ?m, maintaining the total particle volume. The size of particles population with definite radius and density was determined for 1 Mg coal. The influence of density and size of particles with given mixing energies and parameter ? on agglomeration was analysed. It was stated that the size of the particles had an effect on their agglomeration. In the analysed cases the dimensionless parameter of collision turbulence t* needed for particles agglomeration in particular size groups was importantly shorter for particles of initial size 300 and 400 ?m. The change of the mixing energy did not have influence on the agglomeration of coal particles. The theoretical analyses based on computer calculations were supplemented by the analyses of the coal flotation process on an aqueous model. Experiments lied in introducing a foaming agent in the form of aqueous solution of hexanol which, without changing pH of the pulp, lowered surface tension value, and consequently increased the dispersion of air in the suspension. The experimental results were presented in the form of flotation kinetics curves. Fine particles 100-200?m. turned out to be best for flotation, unlike coarse 400-500 ?m.

Sign in / Sign up

Export Citation Format

Share Document