Fully saturated and dewatered filter cakes at different resolutions
datacite.FundingReference.funderName | Deutsche Forschungsgemeinschaft | |
Contributing person | Technical University Bergakademie Freiberg - Institute of Mechanical Process Engineering and Mineral Processing | |
Contributing person | Löwer, Erik (orcid: 0000-0002-6956-8054) | |
Contributing person | German Research Foundation | |
Contributing person | Leißner, Thomas | |
Contributing person | Peuker, Urs Alexander | |
datacite.description.SeriesInformation | Variation of the disperse solid system in the feed from ideal spherical to crushed to platelet-shaped particles | |
datacite.description.TableOfContents | CF_030_Glimmer_007 (in-situ filtration and dewatering, 30 vol.-% of mica particles, total filter cake and high-resolved section), CF_035_BCS201_002 (in-situ filtration and dewatering, 35 vol.-% of quartz particles, total filter cake and high-resolved section), CF_035_sph_002 (in-situ filtration and dewatering, 35 vol.-% of glass particles, total filter cake and high-resolved section), CF_040_Dolomit_014 (in-situ filtration and dewatering, 40 vol.-% of dolomite particles, total filter cake and high-resolved section), CF_040_Kalkstein_001 (in-situ filtration and dewatering, 40 vol.-% of limestone particles, total filter cake and high-resolved section) | |
Documentation of the data | Methods: VDI 2762-1, VDI 2762-2 and VDI 2762-3 Resource Type: X-ray tomography scans of filter cakes (.tiff stacks) Data Acquisition: in-situ filtration and dewatering (downscaled pressure nutsch 5 mm diameter) according VDI 2762-2 and VDI 2762-3 Data Processing: automatic centre shift, beam hardening correction (factor 0.05), gauss smoothing filter (kernel 0.7) see note parameter.png in each measurement file for further measurement and reconstruction parameters | |
Description of the data | Appendices to the data collections of the following publications: - Publication A: Study on the influence of solids volume fraction on filter cake structures using micro tomography - Publication B: Neighborhood Relationships of Widely Distributed and Irregularly Shaped Particles in Partially Dewatered Filter Cakes - Publication C: Insight into filter cake structures using micro tomography: The dewatering equilibrium - Publication D: Network model of porous media – Review of old ideas with new methods - Publication E: Wetting behavior of porous structures: Three-dimensional determination of the contact angle after filter cake dewatering using X-ray microscopy The data collection contains tomographic images (ZEISS Xradia 510 Versa) of partially dewatered filter cakes according to VDI 2762. The images include filter cake structures from additional particle systems such as mica, limestone, quartz, dolomite and glass particles and thus complement the reference system of aluminum oxide particles (publications A to E). All particles are between 50 and 200 µm in size, and their shape varies from spherical to cubic to fibrous and plate-like. | |
Type of the data | Dataset | |
Total size of the dataset | 41071902341 | |
Author | Löwer, Erik | |
Upload date | 2021-08-23T13:35:44Z | |
Upload date | 2026-06-05T11:18:14Z | |
Publication date | 2021-08-23T13:35:44Z | |
Publication date | 2026-06-05T11:18:14Z | |
Data of data creation | 2020 | |
Publication date | 2021-08-23 | |
Abstract of the dataset | Appendix to Publications A to E with investigations of different particle systems (material, size and shape variation). X-ray tomography image of fully and partially dewatered filter cakes. The initial slurries contains mica, dolomite, quartz, limestone or glass particles suspended in a potassium iodide-glycerol brine. The different shaped particles were separated by cake-forming filtration followed by dewatering. All filtration and dewatering experiments took place in an in situ apparatus within the Zeiss Xradia 510 X-ray microscope. The filter cake is dewatered until the minimum degree of saturation is reached within the pore space. A scan is taken at the equilibrium state before and after dewatering. A small section in the center of the desaturated filter cakes was additionally measured at a significantly smaller field of view and higher resolution in order to be able to determine the local contact angle in addition to the saturation distribution and the size of the individual liquid bridges. | |
dc.identifier | CF_035_BCS201_002 | |
dc.identifier | CF_030_Glimmer_007 | |
dc.identifier | CF_040_Kalkstein_001 | |
dc.identifier | CF_040_Dolomit_014 | |
dc.identifier | CF_035_sph_002 | |
Public reference to this page | https://opara.zih.tu-dresden.de/handle/123456789/2528 | |
Public reference to this page | https://doi.org/10.25532/OPARA-122 | |
dc.language | eng | |
Licence | Attribution 4.0 International | |
URI of the licence text | http://creativecommons.org/licenses/by/4.0/ | |
Specification of the discipline(s) | 4::42::403::403-03 | |
Specification of the discipline(s) | 4 | |
Title of the dataset | Fully saturated and dewatered filter cakes at different resolutions | |
dc.title.alternative | variation of the solid system from ideal spherical to crushed to platelet-shaped particles | |
Research instruments | X-ray microscope (ZEISS Xradia Versa 510) | |
Underlying research object | mica (Zinnwald deposit in the Erzgebirge region, Saxony, solid powder, 90...500 µm) | |
Underlying research object | glass beads (manufacturer: Sigmund Lindner GmbH, solid powder, 70...110 µm) | |
Underlying research object | limestone (manufacturer: GEOMIN Erzgebirgische Kalkwerke GmbH, solid powder, 65...120 µm) | |
Underlying research object | quartz (manufacturer: Strobel Quarzsand GmbH, solid powder, 85...160 µm) | |
Underlying research object | potassium iodide (manufacturer: Carl Roth, > 99 %, 25 mmol/l) | |
Underlying research object | glycerol-water solution (manufacturer: Carl Roth, > 99,5 %, 24 m.-% glycerol) | |
Underlying research object | dolomite (manufacturer: Wünschendorfer Dolomitwerk GmbH, solid powder, 45...140 µm) | |
Software | Xradia XMReconstructor (Version 11.1.8) | |
Project abstract | Reliable information about the micro-processes during filtration and dewatering of filter cakes allows more accurate statements about process development and design in any industrial application with solid-liquid separation units. Distributed particle properties such as shape, size, and material influence the porous network structure with considerable local fluctuations in vertical and horizontal alignment in the cake forming apparatus. The present work relates to a wide range of particle sizes and particle shapes and presents their effects on integral, but preferably local, structural parameters of cake-forming filtration. Current models for the relationship between particle properties and resulting porous structure remain inaccurate. Therefore, the central question focus on the model-based correlation between the obtained data and characteristic cake and process parameters. In combination with X-ray computed tomography and microscopy (ZEISS Xradia 510), data acquisition on the structural build-up of filter cakes is possible on a small scale (filter area 0.2 cm²) and a conventional laboratory scale (filter area 20 cm², VDI 2762 pressure nutsch). Thereby, the work focuses on structural parameters at the local level before, during, and after cake dewatering, such as porosity, coordination number, three-phase contact angle, characteristics of pores and isolated liquid regions, the liquid load of individual particles, tortuosity, and capillary length, and the corresponding spatial distributions. Seven different particle systems in the range of 20 and 500 µm, suspended in aqueous solutions with additives for contrast enhancement, served as the initial raw materials for the filter cake build-up. Image data processing from 16-bit greyscale images with a resolution of 2 to 4 µm/voxel edge length includes various operations from denoising filters and shape enhancement with two-stage segmentation to identify air, solid particles, and liquid phase, resulting in a machine learning-based automated approach. Subsequent modeling and correlation of measured parameters rely on experimentally verified quantities from mercury porosimetry, laser diffraction, dynamic image analysis, static and dynamic droplet contour analysis, as well as filtration and capillary pressure tests according to VDI guidelines. The tomography measurements provide microscopic information about the porous system, quantified using characteristic key parameters and distribution functions. | |
Project title | Development of process models based on 3D information about the multiphase processes in the pore space of a filter cake (DFG PE 1160/23-1) |
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- CF_030_Glimmer_007 (in-situ flow cell cake filtration and dewatering, solid fraction 30 vol.-% of mica particles, measurement 007, total filter cake and high-resolved section scan)
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- CF_035_BCS201_002 (in-situ flow cell cake filtration and dewatering, solid fraction 35 vol.-% of quartz particles, measurement 002, total filter cake and high-resolved section scan)
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- CF_040_Dolomit_014 (in-situ flow cell cake filtration and dewatering, solid fraction 40 vol.-% of dolomite particles, measurement 014, total filter cake and high-resolved section scan)
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- CF_040_Kalkstein_001 (in-situ flow cell cake filtration and dewatering, solid fraction 40 vol.-% of limestone particles, measurement 001, total filter cake and high-resolved section scan)
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