Effects of Tailings Gradation on Rheological Properties of Filling Slurry

The key technology in filling mining is the gravity transportation of high-density slurries, and the filling system design is a significant part of this technology. The filling effect depends on the fluidity of the filling slurry. To investigate the influence of the gradation of tailings on the rheological properties of the filling slurry, this study uses particle size analysis to prepare three types of tailings: powder-, relatively fine-, and fine-grained tailings, which are then mixed in different proportions. The rheological properties of the resulting filling slurries are tested; the viscosity coefficients and yield stresses of the slurries are obtained using the analysis software provided with the MCR102 advanced rheometer that is used to measure the rheological properties of the slurries. The experimental results demonstrate that there is no absolute relationship between the rheological properties of the slurry and the size of the tailings particles, but the rheological properties are related to the gradation of tailings. Lubricating effect is weakened with an insufficient content of powder-grained particles in the tailings. On the contrary, when the content of powder-grained particles in the tailings is too high, the viscous substances in the slurry increase. Both of these conditions can increase the friction loss of the slurry.

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High-Resolution Particle Size Analysis of Naturally Occurring Very Fine-Grained Sediment Through Laser Diffractometry

Journal of Sedimentary Research ◽

10.1306/031104740736 ◽

2004 ◽

Vol 74 (5) ◽

pp. 736-743 ◽

Cited By ~ 194

Author(s):

M. Sperazza ◽

J. N. Moore ◽

M. S. Hendrix

Keyword(s):

Particle Size ◽

High Resolution ◽

Particle Size Analysis ◽

Size Analysis ◽

Fine Grained ◽

Laser Diffractometry ◽

Naturally Occurring

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Effect of Layered Double Hydroxides with Different Particle Size on Properties of Bitumen

Materials Science Forum ◽

10.4028/www.scientific.net/msf.913.1062 ◽

2018 ◽

Vol 913 ◽

pp. 1062-1069

Author(s):

Min Wu ◽

Lian Li ◽

Bian Yang He ◽

Jian Ying Yu

Keyword(s):

Particle Size ◽

Physical Properties ◽

Rheological Properties ◽

Layered Double Hydroxides ◽

Particle Size Analysis ◽

Size Analysis ◽

Uv Aging ◽

Aging Resistance ◽

Microscopic Morphology ◽

Double Hydroxides

The crystal structure, microscopic morphology, particle size distribution and UV shielding properties of layered double hydroxides (LDHs) with different particle size were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), laser particle size analysis and ultraviolet and visible (UV-vis) spectrophotometer. The effects of LDHs with different particle size on the physical, rheological properties and UV aging resistance of bitumen were investigated by conventional physical properties and dynamic rheological characteristics. The results indicated that the particle size of LDHs had a little effect on the physical properties, and it had some influence on rheological properties of bitumen, but its influence on the UV aging resistance of bitumen was different significantly. When UV aging time was 9d, the viscosity aging indexes of bitumen modified by LDHs with different particle size (80nm, 115nm and 180nm) decreased by 48.2%, 58.1% and 63.8% compared with the pristine bitumen, respectively. LDHs with the particle size of 180 nm showed better improvement than other two kinds of LDHs on UV aging resistance of bitumen.

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Particle size analysis of fine grained Champlain Sea sediments from a borehole near Ottawa, Ontario

10.4095/205109 ◽

1995 ◽

Author(s):

J A Traynor

Keyword(s):

Particle Size ◽

Particle Size Analysis ◽

Size Analysis ◽

Fine Grained

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The investigation of multi-walled carbon nanotubes dispersion and its influence on rheological properties of cement systems

MATEC Web of Conferences ◽

10.1051/matecconf/201825101030 ◽

2018 ◽

Vol 251 ◽

pp. 01030

Author(s):

Gintautas Skripkiunas ◽

Grigory Yakovlev ◽

Ekaterina Karpova

Keyword(s):

Carbon Nanotubes ◽

Electrical Conductivity ◽

Particle Size ◽

Rheological Properties ◽

Particle Size Analysis ◽

Size Analysis ◽

Cement Pastes ◽

Multi Walled Carbon Nanotubes ◽

Ph Level ◽

Walled Carbon Nanotubes

The current research is devoted to the studying of multi-walled carbon nanotubes (MWCNT) dispersion and its influence on the rheological properties of cement pastes. The pH and electrical conductivity test, zeta potential measurements, particle size analysis were performed for characterization of MWCNT dispersion. The MWCNT dispersion were tested during 1 month and presented the decrease of pH level from 8.89 to 8.02, increase of electrical conductivity from 2.00 to 2.75 mS/cm. The particle size analysis did not reveal the significant changes during 1 month of storage. The rheological test of nanomodified cement pastes were performed for concentration of MWCNT dispersion in the range from 0 to 0.5% by weight of cement. The decrease of yield stress by 30.7% and increase of plastic viscosity by 29.6% were obtained for cement paste modified by MWCNT dispersion in dosage of 0.25% by weight of cement. The changes in flow behaviour were established for cement pastes tested in 5 min after mixing and were not observed for cement pastes tested after 120 min of mixing.

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