Effect of Oleic Acid on Froth Properties and Reverse Flotation Performance of Thermal Coal

2018 ◽  
Vol 71 (8) ◽  
pp. 1841-1846 ◽  
Author(s):  
Liang Shen ◽  
Lingyun Liu ◽  
Jinbo Zhu ◽  
Erle Qiao
Keyword(s):  
Oleic Acid ◽  
Reverse Flotation ◽  
Thermal Coal ◽  
Flotation Performance

The Effect of Ca2+, Mg2+, SO42- and PO43- on Phosphate Ore Flotation

2014 ◽  
Vol 881-883 ◽  
pp. 1670-1673
Author(s):  
Xian Bo Li ◽  
Zhi Hong Liu ◽  
Qin Zhang ◽  
Song Mao ◽  
Long Jiang Li
Keyword(s):  
Great Influence ◽  
Inorganic Ions ◽  
Experimental Results ◽  
Reverse Flotation ◽  
Single Factor ◽  
Flotation Reagents ◽  
Phosphate Ore ◽  
Ore Processing ◽  
Flotation Performance ◽  
Single Factor Experiment

In the process of recycling phosphate ore processing wastewater, the accumulation of inorganic ions and the flotation reagents have a great influence on the flotation performance when they reach to a certain concentration. This paper studied the effect of Ca2+, Mg2+, SO42- and PO43- on the reverse flotation of phosphate ore through the single factor experiment. The experimental results show that Ca2+, Mg2+ and PO43- have less effect on the flotation performance, and that a certain amount of PO43- in the ore pulp can reduce the dosage of acid and improve the flotation result. SO42- has a significant effect on the reverse flotation of phosphate ore and the concentration of SO42- should be controlled under 1 g/L in the backwater utilization.

Study on Collector for Reverse Flotation of Certain Phosphorite in Guizhou

2013 ◽  
Vol 734-737 ◽  
pp. 1086-1092
Author(s):  
Cheng Xiu Li ◽  
Ren Ju Cheng ◽  
Hui Hua Luo
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Linolenic Acid ◽  
Vegetable Oil ◽  
Rapeseed Oil ◽  
Low Grade ◽  
Reverse Flotation ◽  
Flotation Performance ◽  
Magnesium Removal ◽  
Phosphate Concentrate

On the basis of the contrastive research into the flotation performance of several vegetable oil fatty acids, the rapeseed oil fatty acid with better performance was screened out from many fatty acids, and its linolenic acid C18:3content is15.81%, then through modifying and compounding, new magnesium removal collector EM-LS-01was obtained. With the use of this agent in certain low-grade high-Mg phosphorite, the phosphate concentrate indexes of single reverse flotation are grade of 30.25% P2O5, recovery of 90.63% and content of 0.99% MgO.

The Application of Fatty Acids Emulsions in Thermal Coal Reverse Flotation

2015 ◽  
Vol 36 (3) ◽  
pp. 163-173 ◽  
Author(s):  
Liang Shen ◽  
Huai-fa Wang ◽  
Bing-lin Guo ◽  
Hao Wang
Keyword(s):  
Fatty Acids ◽  
Reverse Flotation ◽  
Thermal Coal

Design and flotation performance of a novel hydroxy polyamine surfactant based on hematite reverse flotation desilication system

2020 ◽  
Vol 301 ◽  
pp. 112428 ◽  
Author(s):  
Wenbao Liu ◽  
Wengang Liu ◽  
Qiang Zhao ◽  
Yanbai Shen ◽  
Xinyang Wang ◽  
...  
Keyword(s):  
Reverse Flotation ◽  
Flotation Performance

scholarly journals Effect of Al (III) Ions on the Separation of Cassiterite and Clinochlore Through Reverse Flotation

Minerals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 347 ◽  
Author(s):  
Yumeng Chen ◽  
Xiong Tong ◽  
Dongxia Feng ◽  
Xian Xie
Keyword(s):  
Contact Angle ◽  
Photoelectron Spectroscopy ◽  
Interaction Mechanism ◽  
Reverse Flotation ◽  
X Ray ◽  
Angle Measurements ◽  
Mineral Flotation ◽  
Contact Angle Measurements ◽  
Flotation Performance ◽  
Hydrophobic Clay

Most hydrophobic clay minerals, such as clinochlore, are known to cause problems in the recovery of cassiterite. In this study, a new reagent scheme, i.e., sodium oleate (NaOL) as a collector and Al (III) ions as a depressant, for reverse flotation separation of cassiterite and clinochlore was investigated. The flotation performance and interaction mechanism were studied by microflotation tests, adsorption tests, contact angle measurements, and X-ray photoelectron spectroscopy (XPS) analysis. Results of single mineral flotation experiments showed that NaOL had a different flotation performance on cassiterite and clinochlore, and the addition of Al (III) ions could selectively inhibit the floatability of cassiterite. Reverse flotation tests performed on mixed minerals indicated that the separation of cassiterite and clinochlore could be achieved in the presence of NaOL and Al (III) ions. Adsorption experiments demonstrated that Al (III) ions hindered the adsorption of NaOL on cassiterite surfaces but exerted little influence on the adsorption of NaOL on clinochlore surfaces. Results of contact angle measurements indicated that Al (III) ions could impede the hydrophobization process of cassiterite in NaOL solution. XPS results showed that aluminum species were adsorbed onto the cassiterite surfaces through the interaction with O sites.

scholarly journals THE EFFECT OF REVERSE FLOTATION METHOD ON SILICA SAND AS WATERPROOFING MORTAR

2021 ◽  
Vol 22 (1) ◽  
pp. 8
Author(s):  
Okky Putri Prastuti ◽  
Ayu Tri Septianingrum ◽  
Elisya Dianty Fatmala ◽  
Ufafa Anggarini ◽  
Tri Eddy Susanto ◽  
...  
Keyword(s):  
Contact Angle ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Oleic Acid ◽  
Silica Sand ◽  
Reverse Flotation ◽  
Water Effect ◽  
Optimum Ratio ◽  
Compressive Strength Test ◽  
Flotation Method

THE EFFECT OF REVERSE FLOTATION METHOD ON SILICA SAND AS WATERPROOFING MORTAR. Waterproof fabrication mortar cement by silica sand using reverse flotation silica (RFS) method was evaluated by waterproof absorption coefficient, compressive strength test, attractive test, and contact angle. RFS is used to replace waterproof agent and aggregate mortar to reduce cost. The aims of this experiment are to know the RFS process, the ratio between waterproof mortar cement with RFS and mortar, to determine performance and characteristic waterproof mortar cement. Methods used are prepared RFS, mortar cement fabrication, and testing (compressive strength, tensile strength, permeability, contact angle, XRF, FTIR, SEM, BET). Variable used are ratio cement/silica sand, concentrations of CaCl2, curing time, oleic acid, and sodium oleate addition. Optimum collector addition is obtained by oleic acid with compress strength 167.65 kg/cm2, tensile strength 0.16 MPa, permeability 4.6 cm, and contact angle 95°. Curing inside water effect and outside temperature give compress strength 167.65 kg/cm2 and 163.24 kg/cm2, permeability curing inside the water and outside temperature are 4.6 cm and 12 cm. Optimum CaCl2 addition is gained at CaCl2 1.8M with compress strength 64.29 kg/cm2, tensile strength 0.15 MPa, permeability 2.4 cm, contact angle 95°. Optimum ratio cement/RFS is 1:1 with compress strength 167.65 kg/cm2, tensile strength 0.16 MPa, permeability 4.6 cm, and contact angle 950.

Flotation performance of a new collophane reverse flotation collector

2018 ◽  
Vol 35 (2) ◽  
pp. 98-108
Author(s):  
D.S. He ◽  
Z.H. Xie ◽  
W.M. Xie ◽  
X. Liu ◽  
H.Q. Li ◽  
...  
Keyword(s):  
Reverse Flotation ◽  
Flotation Performance ◽  
Flotation Collector

Oleic acid–SDS interaction in phosphate reverse flotation

2020 ◽  
pp. 22-26
Author(s):  
A. A. El-Midany ◽  
◽  
Y. Arafat ◽  
S. E. El-Mofty ◽  
◽  
...  
Keyword(s):  
Oleic Acid ◽  
Reverse Flotation

scholarly journals Effects of Cations/Anions in Recycled Tailing Water on Cationic Reverse Flotation of Iron Oxides

Minerals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 161 ◽  
Author(s):  
Min Tang ◽  
Shuming Wen
Keyword(s):  
Iron Oxides ◽  
Outer Sphere ◽  
Processing Plant ◽  
Reverse Flotation ◽  
Surface Complexes ◽  
Flotation Process ◽  
Potential Measurement ◽  
Local Plant ◽  
Fine Quartz ◽  
Flotation Performance

It is well known that reverse flotation performance of iron oxides is affected by water quality. Since many potential variations among water sources recycling in a mineral processing plant bring unpredictable effects on the flotation system of iron oxides: disturbing ions/compounds, pH, hardness, residual reagents, etc. In this study, the recycled tailing water from a local plant, characteristically constituting of Ca2+, Mg2+, Na+, K+, Al3+, Fe3+, Cl−, SO42− etc., was introduced into the cationic reverse flotation process of an iron ore. A series of bench flotation tests using iron ores, micro-flotation tests using pure fine quartz, water chemical analyses, and zeta potential measurement were conducted with the objective of identifying the possible influences of both cations and anions in the recycled tailing water on the flotation performance. The flotation results pointed out that the cation with higher valency had more severe influences on the recovery of iron oxides. The formation of the pH-dependent surface complexes on mineral surfaces, for example, Fe(OH)+, Fe(OH)2+, and Fe(OH)3 resulted from Fe3+ ions adsorption, contributed to the less negative zeta potentials of the quartz, and consequently weakened its interaction with the amine collector. It is worthy to note that SO42− ions seem to have a more positive effect on the recovery of iron oxides than Cl− ions. This is probably attributed to the formation of inner/outer- sphere surface complexes on the iron oxides, inhibiting the dissolution of the iron ions/species, and the coordination with these cations from the recycled tailing water, shielding their disturbances in the flotation.

A magnetic super lattice

1987 ◽  
Vol 45 ◽  
pp. 360-361 ◽  
Author(s):  
M.D. Bentzon ◽  
J. v. Wonterghem ◽  
A. Thölén
Keyword(s):  
Thermal Decomposition ◽  
Oleic Acid ◽  
Magnetic Fluid ◽  
Magnetic Particles ◽  
Carbon Film ◽  
Thick Layer ◽  
Amorphous Iron ◽  
Super Lattice ◽  
Carrier Liquid ◽  
Median Diameter

We report on the oxidation of a magnetic fluid. The oxidation results in magnetic super lattice crystals. The “atoms” are hematite (α-Fe2O3) particles with a diameter ø = 6.9 nm and they are covered with a 1-2 nm thick layer of surfactant molecules.Magnetic fluids are homogeneous suspensions of small magnetic particles in a carrier liquid. To prevent agglomeration, the particles are coated with surfactant molecules. The magnetic fluid studied in this work was produced by thermal decomposition of Fe(CO)5 in Declin (carrier liquid) in the presence of oleic acid (surfactant). The magnetic particles consist of an amorphous iron-carbon alloy. For TEM investigation a droplet of the fluid was added to benzine and a carbon film on a copper net was immersed. When exposed to air the sample starts burning. The oxidation and electron irradiation transform the magnetic particles into hematite (α-Fe2O3) particles with a median diameter ø = 6.9 nm.

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