A study of the deep-bed filtration of a suspension of ash particles

Sokovnin, O. M.; Zagoskina, N. V.; Zagoskin, S. N.

doi:10.1134/s0040579515040363

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…To obtain a satisfactory filtration performance, the filtration mechanism needs to be understood first. Generally, the model for the capture of particles is based on five filtration mechanisms (Zamani and Maini 2009;Sokovnin et al 2015): physical sieving, interception, diffusion, inertial separation, and electrostatic attraction. Among these, physical sieving, interception, and diffusion usually play major roles in the filtration performance and largely depend on the pore size and structure (Zhao et al 2017;Gong et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Preparation of cellulosic air filters with controllable pore structures via organic solvent-based freeze casting: The key role of fiber dispersion and pore size

Zhang

Yang

et al. 2018

BioRes

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Green and biodegradable cellulose filters with controlled designer pore structures were prepared using organic solvent-based freeze casting. In this paper, the relationship between the different freeze media, including ethanol, isopropanol, and tertiary-butyl alcohol, and the microstructure of the porous filters was investigated. The results of the pore size distribution indicated that the pore channel size decreased remarkably when organic solvents were used as the freezing media. Moreover, the filters showed high filtration efficiencies, up to 99.70% and 99.66% for 0.5 µm and 0.3 µm particles, respectively, under a pressure drop of 180 Pa and at 32 L·min-1 flow rate. The fabrication of cellulosic filters would not only make it a promising candidate for capturing fine particulate matter, but also provide a versatile approach to regulate and design a porous structure for materials applied in various fields.

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Section: Introductionmentioning

confidence: 99%

Preparation of cellulosic air filters with controllable pore structures via organic solvent-based freeze casting: The key role of fiber dispersion and pore size

Zhang

Yang

et al. 2018

BioRes

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Experience in solving the problem of filtering and washing unstructured sediments of hydrometallurgical processing of polymetal sludge

Mokhireva,

Loginova,

Mirolyubov

et al. 2024

jour

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The article aims to select a filter design and mode of washing cake in the hydrometallurgical processing of polymetallic sludge in order to minimize the volume of washing water and obtain a high-quality cake—iron oxide pigment precursor. An analysis of the chemical composition of the subject matter–pulp following hydrochloric acid treatment of polymetallic sludge—was performed using atomic absorption spectrophotometry and X-ray fluorescence spectrometry, while the particle size distribution was studied via laser diffraction. The analysis of the chemical composition revealed that the liquid phase contains, g/dm3 : MgCl2 90.5–105.6; AlCl3 35.8–37.6; NiCl2 8.1–9.0; FeCl3 24.5–27.1; CrCl3 5.9–6.5; MnCl2 2.1–2.4; HCl 6.5–7.7. The solid particles present in the pulp are represented by two distinct groups of particles having the following sizes: 0.1–1 µm and 1–120 µm. It was found that pulp separation using a chamber-membrane filterpress with the vertical arrangement of plates minimizes washing water volume up to S:L 1:1, returns the mother liquor captured by the cake to the process cycle, and helps to obtain high-quality washed cake with a minimum content of residual salts (0.5 wt%). The optimal temperature of the pulp entering the filtering process is 80℃, while that of washing water is 60℃. Cake washing was shown to be the limiting step of the pulp separation process, which can be realized via the displacement method given the use of acidified water with pH 1.5. It was found necessary to use filter cloths made of 100% polypropylene, with a specific weight of the fabric of 540 g/m2 ± 10%, air permeability of 6 L/dm2 per minute ± 30% at 200 Pa, and a maximum operating temperature of at least 90ºC. Thus, the specific capacity of the filter press was calculated and a standard machine with the vertical arrangement of plates and a filtering surface of 500 m2 was selected for pulp separation following hydrometallurgical processing of wet polymetallic sludge (8000 tons/year).

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A study of the deep-bed filtration of a suspension of ash particles

Cited by 2 publications

References 11 publications

Preparation of cellulosic air filters with controllable pore structures via organic solvent-based freeze casting: The key role of fiber dispersion and pore size

Preparation of cellulosic air filters with controllable pore structures via organic solvent-based freeze casting: The key role of fiber dispersion and pore size

Experience in solving the problem of filtering and washing unstructured sediments of hydrometallurgical processing of polymetal sludge

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