Effect of electrolyte on the rheological properties of coal‐water mixtures

Kaji, Ryuichi; Muranaka, Yasushi; Miyadera, Hiroshi; Hishinuma, Yukio

doi:10.1002/aic.690330103

Cited by 34 publications

(13 citation statements)

References 20 publications

(15 reference statements)

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“…A number of researches Kaji et al, 1986;Woskoboenko et al, 1989;Leong and Boger, 1990;Kawatra et al, 1995;and Atesok et al, 2002) have studies the effects of coal properties on the viscosity of coal slurry.…”

Section: Test Resultsmentioning

confidence: 99%

Geotechnical Properties and Flow Behavior of Coal Refuse under Static and Impact Loading

Yu¹,

Zeng

Michael³

2019

J. Geotech. Geoenviron. Eng.

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Section: Test Resultsmentioning

confidence: 99%

Geotechnical Properties and Flow Behavior of Coal Refuse under Static and Impact Loading

Yu¹,

Zeng

Michael³

2019

J. Geotech. Geoenviron. Eng.

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“…The lignite moisture was measured between 12 and 16 wt %, depending upon the psd of the samples after the initial dry grinding process, and should be taken into account when converting the solids loading weight percent to the solids volume fraction ϕ. To specify the volume fraction ϕ for the CWS in previous studies, the following relation was proposed: , ϕ = 1 + α hum false( normalρ lignite / normalρ normalH 2 normalO false) 1 + false( normalρ lignite / normalρ normalH 2 normalO false) false( m normalH 2 normalO / m lignite false) where a hum is the equilibrium moisture content of the coal. Previous studies on CWS give a straight conversion of the solids loading weight percent to the solids volume fraction ϕ, especially for high-rank coals having increased content of C %, without taking into account the inherent moisture. − The effect of the physicochemical properties of the lignite particles to the achieved ϕ values is discussed in detail in the Results and Discussion.…”

Section: Methodsmentioning

confidence: 99%

Preparation and Rheological Characterization of Lignite−Water Slurries^†

Goudoulas¹,

Kastrinakis²,

Nychas³

2010

Energy Fuels

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This paper reports the preparation of lignite-water slurries (LWS) and critical characteristics affecting their rheology. The slurries were prepared using wet grinding in a ball mill, having particle size distributions up to 300 μm and concentrations up to 50 wt % in solids. Surfactants and polyelectrolytes were used as additives in the slurryfication process to achieve acceptable rheological behavior and stability. Rheological measurements were performed using parallel disks geometry, and the typical shear rates were on the order from 10 -2 to 10 3 s -1 . The effect of the particle size distribution was investigated, and the apparent viscosity of the slurries, for the same solids volume fraction, was found to be lower for broad multimodal distributions. In addition, oscillatory rheological measurements were carried out to investigate the microstructure of the slurries, and it was observed that, for dense LWS (φ > 0.40), the viscoelastic behavior was controlled by the elastic contribution than the viscous one. When the experimental results of the lignite slurries were compared to rheological models of viscosity, satisfactory agreement was found, although relatively low values of φ max were observed, attributed to the physicochemical properties and the shape of the lignite particles. The results of the present study point out that, with an adequate protocol of measurement and, in turn, reproducible data, the apparent viscosity curves of LWS can be effectively described, qualitatively as well as quantitatively, by a well-established model.

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“…The coal content has a direct influence on the flow characteristics of CWS [11,12]. The rheological behavior of the sixteen coals is shown in Table 2 and Figure 2.…”

Section: Rheological Behavior Of Different Rank Coalsmentioning

confidence: 98%

Effects of Coal Characteristics on the Properties of Coal Water Slurry

Yuchi

et al. 2005

Coal Preparation

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The effects of coal characteristics on the properties of coal water slurry (CWS) were systemically studied using sixteen Chinese coals of different ranks from lignite to anthracite. The correlation between coal properties and CWS characteristics were investigated by multivariate progressive regression analysis. CWS properties examined in this study included slurryability (concentration of slurry that gives an apparent viscosity at 1200 mPa Á s at a shear rate of 28.38 s À1 ), rheological behavior (represented by a flow index), and static stability (days for formation of soft sediment). Coal properties examined in the study included coal rank, air equilibrium moisture (M ad ), maximum moisture holding capacity (MHC), ash content, surface properties, petrographic macerals, pore structure, and adsorption characteristics of dispersants.

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Effect of electrolyte on the rheological properties of coal‐water mixtures

Cited by 34 publications

References 20 publications

Geotechnical Properties and Flow Behavior of Coal Refuse under Static and Impact Loading

Geotechnical Properties and Flow Behavior of Coal Refuse under Static and Impact Loading

Preparation and Rheological Characterization of Lignite−Water Slurries^†

Effects of Coal Characteristics on the Properties of Coal Water Slurry

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Effect of electrolyte on the rheological properties of coal‐water mixtures

Cited by 34 publications

References 20 publications

Geotechnical Properties and Flow Behavior of Coal Refuse under Static and Impact Loading

Geotechnical Properties and Flow Behavior of Coal Refuse under Static and Impact Loading

Preparation and Rheological Characterization of Lignite−Water Slurries†

Effects of Coal Characteristics on the Properties of Coal Water Slurry

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Product

Resources

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Preparation and Rheological Characterization of Lignite−Water Slurries^†