Recovery of Microcrystalline Graphite from Quartz Using Magnetic Seeding

Efficient beneficiation of microcrystalline graphite remains a challenge. Selective recovery of microcrystalline graphite from quartz using hydrophobized magnetite as magnetic seed is studied in this work. Magnetite was hydrophobized by the surface coating of sodium oleate. The hydrophobic agglomerates were then separated by magnetic separation. Sedimentation experiments were performed to study the adhesion of microcrystalline graphite and quartz to magnetite particles. The results showed that hydrophobized magnetite led to a higher microcrystalline graphite recovery than that of the original magnetite, due to the higher probability to bond with microcrystalline graphite. However, the hydrophobization of the magnetite surface had an insignificant effect on its interaction with quartz. The force analysis based on the extended Derjaguin-Landau-Verwey-Overbeek (EDLVO) theory indicated that the total attractive interaction between hydrophobized magnetite and microcrystalline graphite were obviously stronger than that between hydrophobized magnetite and quartz, resulting in the selective aggregation between hydrophobized magnetite and microcrystalline graphite.

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The role of sodium oleate (NaOL) in the magnetic separation of pentlandite from serpentine using magnetic coating

Powder Technology ◽

10.1016/j.powtec.2019.01.036 ◽

2019 ◽

Vol 345 ◽

pp. 492-500 ◽

Cited By ~ 3

Author(s):

Jiwei Lu ◽

Zhitao Yuan ◽

Mingming Li ◽

Xuan Zhao ◽

Zhongyun Tong ◽

...

Keyword(s):

Magnetic Separation ◽

Sodium Oleate ◽

Magnetic Coating

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Toxicity of Fe0 Nanoparticles on the Denitrifying Bacteria-Alcaligenes Eutrophus

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.343-344.889 ◽

2011 ◽

Vol 343-344 ◽

pp. 889-894

Author(s):

Mei Ying Dong ◽

Xue Wang ◽

Fang Huang ◽

Zhao Hui Jin ◽

Tie Long Li

Keyword(s):

Sodium Oleate ◽

Surface Coating ◽

Iron Nanoparticles ◽

Bimetallic Nanoparticles ◽

Alcaligenes Eutrophus ◽

Denitrifying Bacteria ◽

Nitrification Inhibition ◽

Inhibition Rate ◽

Fe Nanoparticles ◽

Metal Materials

The bio-toxicity of Fe0 nanoparticles on the denitrifying bacterial- Alcaligenes eutrophus was detected by the two methods of detecting inhibition of the growth of microorganisms and nitrification inhibition rate. The results showed that Fe0 nanoparticles had obvious toxicity on the growth and nitrification inhibition rate. Besides, there had distinct relationship between dose and toxicity of Fe0 nanoparticles. Meanwhile, we also studied effects of different kinds of Fe0 nanoparticles on microorganism, including bimetallic nanoparticles(nano Fe–Ni) and coated iron nanoparticles (sodium oleate–Fe0nanoparticles). We detected that the bio-toxicity of these three Fe0 nanoparticles followed the sequence of Ni-containing nanoparticles>unmodified NZVI>the sodium oleate–Fe0 nanoparticles. In conclusion, Fe0 nanoparticles had visible toxicity on the denitrifying bacterial, but we can decrease the toxicity of Fe nanoparticles by surface coating and decoration of nano-metal materials.

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Removal of magnetite particles and lubricant contamination from viscous oil by High-Gradient Magnetic Separation technique

Separation and Purification Technology ◽

10.1016/j.seppur.2011.07.035 ◽

2012 ◽

Vol 92 ◽

pp. 122-128 ◽

Cited By ~ 30

Author(s):

Katharina Menzel ◽

Johannes Lindner ◽

Hermann Nirschl

Keyword(s):

Magnetic Separation ◽

Separation Technique ◽

High Gradient Magnetic Separation ◽

High Gradient ◽

Viscous Oil ◽

Magnetite Particles

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Selective recovery of micrometer particles from mixtures using a combination of selective aggregation and dissolved-air flotation

Colloids and Surfaces A Physicochemical and Engineering Aspects ◽

10.1016/j.colsurfa.2006.02.003 ◽

2006 ◽

Vol 280 (1-3) ◽

pp. 216-231 ◽

Cited By ~ 1

Author(s):

P. Van Hee ◽

W.K. Lin ◽

L. Benac-Vegas ◽

R.G.J.M. Van der Lans ◽

G.J.M. Koper ◽

...

Keyword(s):

Dissolved Air Flotation ◽

Selective Recovery ◽

Air Flotation ◽

Selective Aggregation ◽

Dissolved Air

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Magnetic Separation of Fine Colloidal Magnetite particles by a superconducting magnet

IEEJ Transactions on Power and Energy ◽

10.1541/ieejpes1990.119.11_1181 ◽

1999 ◽

Vol 119 (11) ◽

pp. 1181-1186 ◽

Cited By ~ 2

Author(s):

Hidehiko Okada ◽

Jinrou Tamura ◽

Kimichika Fukushima

Keyword(s):

Magnetic Separation ◽

Superconducting Magnet ◽

Magnetite Particles

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Role of Magnetite and Sodium Oleate in the High Gradient Magnetic Separation of Calcite Using Magnetic Coating of the Surface

Journal of Colloid and Interface Science ◽

10.1006/jcis.1993.1045 ◽

1993 ◽

Vol 155 (2) ◽

pp. 340-346 ◽

Cited By ~ 9

Author(s):

Ahamad M.H. Shaikh ◽

S.G. Dixit ◽

S. Venkatachalam

Keyword(s):

Magnetic Separation ◽

Sodium Oleate ◽

High Gradient Magnetic Separation ◽

High Gradient ◽

Magnetic Coating

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Present Status of China's Hematite Processing Technology Study

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.734-737.958 ◽

2013 ◽

Vol 734-737 ◽

pp. 958-961

Author(s):

Feng Jiu Li ◽

Yun Long Qu ◽

Fu Ping Li ◽

Jin Rui Zhang

Keyword(s):

Magnetic Separation ◽

Present Status ◽

Recovery Rate ◽

Separation Process ◽

Processing Technology ◽

Reverse Flotation ◽

Technology Study ◽

Flotation Process ◽

Iron Grade ◽

Selective Aggregation

This paper describes the hematite beneficiation technology progress and equipment,the current research has through biological flotation, flotation and selective aggregation separation process for separating iron minerals.Can reach a maximum of iron grade of 67.50%, metal recovery rate of 75% of the final concentrate of current hematite beneficiation process for gravity separation magnetic separation reverse flotation process.

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