Coarsening in solid-liquid mixtures - A summary of results

2001 ◽  
Author(s):  
V. Snyder ◽  
D. Rowenhorst ◽  
P. Voorhees ◽  
J. Alkemper
Keyword(s):  
Liquid Mixtures ◽  
Solid Liquid

Measurement of Solid-Liquid Mixtures Using Electrical Tomography Measurement Techniques

2009 ◽  
Author(s):  
Gary Bolton ◽  
Stephen Stanley
Keyword(s):  
High Speed ◽  
Measurement Techniques ◽  
Electrode Array ◽  
Liquid Mixtures ◽  
Industrial Plant ◽  
Electrical Tomography ◽  
Impedance Tomography ◽  
Electrical Imaging ◽  
Solid Liquid ◽  
Mixture Homogeneity

Electrical Impedance Tomography measurement techniques have been applied to a variety of solid-liquid processes in the laboratory and on industrial plant. This paper reviews the advances in the measurement techniques to determine key process information in solid-liquid systems such as concentration mapping, mixture homogeneity, interface detection and suspension velocity. A number of applications to solid-liquid flow applications are presented. The use of the technology for improved design and operation is highlighted, as are the opportunities for on-line sensing for flow measurement, fault detection and process control. A recent development in high-speed electrical imaging has allowed velocity maps to be calculated for fast flowing suspensions (up to 10 ms−1). The methodology for determining mixture homogeneity in both pipeline flows and agitated tanks are summarized. Finally the application of a linear ERT electrode array to identify interfaces during the settling of solid-liquid mixtures is presented.

Efficient Solvent‐Free Synthesis of Sucrose Esters via Sand‐Milling Pretreatment on Solid–Liquid Mixtures

2019 ◽  
Vol 22 (6) ◽  
pp. 1515-1520 ◽  
Author(s):  
Jiazhi Chen ◽  
Yuan Li ◽  
Xiaotian Chen ◽  
Yuliang Mai ◽  
Minjie Gao ◽  
...  
Keyword(s):  
Liquid Mixtures ◽  
Solvent Free ◽  
Sucrose Esters ◽  
Solid Liquid ◽  
Solvent Free Synthesis

Acoustic Properties of Solid-Liquid Mixtures and the Limits of Ultrasound Diagnostics—I: Experiments (Data Bank Contribution)

1993 ◽  
Vol 115 (4) ◽  
pp. 665-675 ◽  
Author(s):  
C. M. Atkinson ◽  
H. K. Kyto¨maa
Keyword(s):  
Spatial Resolution ◽  
Liquid Mixtures ◽  
Acoustic Properties ◽  
Present System ◽  
Linear Superposition ◽  
Two Phase ◽  
Ultrasound Diagnostics ◽  
Wide Range ◽  
Silica Beads ◽  
Solid Liquid

Ultrasound as a technique for interrogating two-phase mixtures has the advantages of being nonintrusive, it has a very high frequency response, and is able to penetrate typically opaque highly concentrated mixtures. There exists, however, an inherent compromise in the choice of the frequency of the ultrasound between maximizing spatial resolution and ensuring adequate beam penetration. To this end, the propagation of ultrasound in solid-liquid mixtures has been investigated experimentally for a range of frequencies and concentrations of the dispersed phase. The measured attenuation has been shown to depend roughly linearly on frequency for 0.1<kr<0.75 (where the wavenumber k = 2π/λ, and λ and r are the wavelength and particle radius, respectively), and quadratically for kr > 0.75. As a function of solids concentration, the attenuation displays a maximum at a solids fraction of about 30 percent for the present system of silica beads in water. This robust and reproducible result contradicts models of attenuation that rely on linear superposition of single particle effects. The intensity field produced by a circular disk transducer in a two phase medium at kr~1 shows excellent agreement with the Rayleigh integral with a modified wavenumber and attenuation parameter, and it allows for the prediction of the transducer beam geometry in two phase mixtures for a wide range of frequencies and solids fractions. The limitations of ultrasonic wave propagation as a nonintrusive diagnostic technique, in terms of spatial resolution, have been discussed. Acknowledging these limitations, an ultrasonic instrument for determining the velocity of moving particles at or near maximum packing was built. Preliminary results from this prototypical ultrasonic Doppler velocimeter show good agreement with observations of the settling velocity of silica beads at high concentrations.

Sign in / Sign up

Export Citation Format

Share Document