On-line measurement of particle size in mineral slurries

Ultrasonic crystallization monitoring technique for simultaneous in-line measurement of liquid and solid phase

“…These techniques include, but are not limited to, conductivity [6], density [7], turbidity [8], ultrasonic (single frequency) [9,10], in-line microscopy [11], laser backscattering (FBRM or 3D ORM) [5,[12][13][14], laser diffraction [15], attenuated total reflection-Fourier transform infrared (ATR-FTIR) [16] or ultrasonic attenuation spectroscopy (UAS), which correlates ultrasonic attenuation with a spectra of frequencies [4,[17][18][19][20][21][22]. All these techniques are established and applied to monitor/control crystallization processes.…”

Estimating Average Particle Size by Focused Beam Reflectance Measurement (FBRM)

“…However, few can be applied in situ/in-line, or over a wide range of solid concentrations. Ultrasonic techniques have been developed [6], but require lengthy measurement times, making them unsuitable for dynamic systems. Standard laboratory laser diffraction instruments have also been modified [7 ± 10] to allow on-line sizing of a side stream, but are inconvenient for field or plant use and typically require some degree of dilution.…”

Application of Laser Ionization Time-of-Flight Mass Spectrometry for the Direct Measurement of a Silane Coupling Agent in Slurries

“…Several analytical techniques are applied to evaluate metal oxide nanoparticles modified with organic compounds, which amounts to thermogravimetric (TG) analysis of the weight of organic coatings [3][4][5] and diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy for the analysis of interactions between organic compounds and metal oxides. [5][6][7][8] On the other hand, information directly obtained from slurries, such as viscosity of a slurry 9 and the diameter of particles, 10 is limited at present. Therefore, analytical methods that can offer information of constituents, such as unreacted agents that remain in slurries without pretreatment or separation, are important for a direct understanding of the characteristics of slurries.…”