A comparison of filtration characterisation devices for compressible suspensions using conventional filtration theory and compressional rheology

Application of porous TiAl intermetallic compound in purification of industrial TiCl4 liquid in Ti metallurgy

“…Considering the existence of a certain form of filter cake layer in almost all the end filtration processes, there is a four-layer structure, namely, raw liquid/ filter cake layer/filter medium/filtrate, in the dynamic model of the filtration procedure of raw TiCl 4 liquid. The Ruth equation [33][34][35][36] is applied to the filtration procedure, and the relationship of filtration rate with filter media resistance, filter cake layer resistance, filtration pressure difference and TiCl 4 filtrate viscosity is obtained filter cake layer, m·kg −1 ; ν m is the filtrate equivalent in the presence of the assumed equivalent filter cake layer, m 3 ·m −2 . The integral form of the above formula can be further obtained [36]: According to the actual measured data of TiCl 4 filtrate amount ν with the filtration time t within 1 h, the corresponding difference value Δt/Δν is calculated, as shown in table 3.…”

“…The filtrate equivalent ν m is determined to be 1.05×10 2 m 3 ·m −2 according to the intercept on the ν axis of the linear equation. Thus, the filter medium resistance R m of porous TiAl intermetallic compound can be calculated to be 6.11×10 10 m −1 according to equation (3) [33,34,36], which indicates that the porous material exhibits high efficiency in the filtration process.…”

Filterkuchenwäsche makroporöser Kieselgelpartikel

“…veranschaulicht. Er entspricht dem einer Kompressions‐Permeabilitätszelle, womit vor allem die Eigenschaften kompressibler Filterkuchen untersucht werden können . Durch ihre Konzeption eignet sich die Anlage aber auch für Waschversuche.…”

Investigating the Effect of Packed Structures on Filter Cake Compressibility

“…Comparisons between two frameworks describing the dewatering of compressible suspensions have been made in recent investigations 7. They are known as conventional filtration theory, attributed to Ruth, Tiller, and Shirato 8, and compressional rheology, developed by Buscall, White, and Landman 9.…”

“…While the former mostly uses space‐averaging approaches to quantify separation descriptors empirically, the latter yields local information from a phenomenological point of view. Nevertheless, the two theories have been proven to be interchangeable and able to complement each other 7. Hence, this study benefits from both frameworks to evaluate process strategies based on dealing with filter cake compressibility.…”