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X-ray tomography scans of filter cakes (feed slurry: variation in fraction of fines)
Subtitle: variation of the fine fraction by 0, 20, 30, 40, 50, 60 and 100 vol.-% in the feed slurry
Metadata
| Additional title | Subtitle: variation of the fine fraction by 0, 20, 30, 40, 50, 60 and 100 vol.-% in the feed slurry | |
| Alternative existing references for this dataset | CF_035_020045_008 | |
| Alternative existing references for this dataset | CF_035_020045_009 | |
| Alternative existing references for this dataset | CF_035_020045_010 | |
| Alternative existing references for this dataset | CF_035_020200_02_001 | |
| Alternative existing references for this dataset | CF_035_020200_02_004 | |
| Alternative existing references for this dataset | CF_035_020200_02_011 | |
| Alternative existing references for this dataset | CF_035_020200_03_005 | |
| Alternative existing references for this dataset | CF_035_020200_04_002 | |
| Alternative existing references for this dataset | CF_035_020200_04_006 | |
| Alternative existing references for this dataset | CF_035_020200_04_009 | |
| Alternative existing references for this dataset | CF_035_020200_05_007 | |
| Alternative existing references for this dataset | CF_035_020200_06_003 | |
| Alternative existing references for this dataset | CF_035_020200_06_008 | |
| Alternative existing references for this dataset | CF_035_020200_06_010 | |
| Alternative existing references for this dataset | CF_035_055200_013 | |
| Alternative existing references for this dataset | CF_035_055200_015 | |
| Alternative existing references for this dataset | CF_035_055200_022 | |
| Other contributing persons, institutions or organisations | Peuker, Urs Alexander - Technical University Bergakademie Freiberg - Institute of Mechanical Process Engineering and Mineral Processing - Supervisor | |
| Other contributing persons, institutions or organisations | Leißner, Thomas - Technical University Bergakademie Freiberg - Institute of Mechanical Process Engineering and Mineral Processing - Supervisor | |
| Other contributing persons, institutions or organisations | German Research Foundation - Sponsor | |
| Person(s) who is (are) responsible for the content of the research data | Löwer, Erik - Technical University Bergakademie Freiberg - Institute of Mechanical Process Engineering and Mineral Processing (ORCID: 0000-0002-6956-8054) | |
| Description of further data processing | automatic centre shift, beam hardening correction (factor 0.05), gauss smoothing filter (kernel 0.7) | |
| Type of data acquisition | Experiment: in-situ filtration and dewatering (downscaled pressure nutsch 5 mm diameter) according VDI 2762-2 and VDI 2762-3 | |
| Used research instruments or devices | X-ray microscope (ZEISS Xradia Versa 510) | |
| Research objects | Substance: gamma-Al2O3 (manufacturer: Almatis, solid powder, 20...45 µm) | |
| Research objects | Substance: gamma-Al2O3 (manufacturer: Almatis, solid powder, 55...200 µm) | |
| Research objects | Substance: glycerol (manufacturer: Carl Roth, > 99,8 %, 24 m.-%) | |
| Research objects | Substance: potassium iodide (manufacturer: Carl Roth, > 99 %, 25 mmol/l) | |
| Abstract | X-ray tomography scans of partially dewatered filter cakes with variation of fine particles within the feed slurry. The mixture composition varies by addition of fines by 0, 20, 30, 40, 50, 60 and 100 vol.-%. The initial slurry contains Al2O3 particles suspended in a potassium iodide-glycerol solution and separated by cake-forming filtration. All filtration experiments took place in an in-situ apparatus inside the Zeiss Xradia 510 X-ray microscope. | |
| Applied methods and techniques | VDI 2762-1, VDI 2762-2 and VDI 2762-3 | |
| Additional descriptive information to understand the data | see note parameter.png in each measurement file for further measurement and reconstruction parameters | |
| Series information | Variation of the fine fraction by 0, 20, 30, 40, 50, 60 and 100 vol.-% in the feed slurry. For all mixtures two self-similiar Al2O3 particles systems (20...45 µm and 55...200 µm) are used. | |
| Table of contents | CF_035_020045_008 (in-situ filtration and dewatering, 100 vol.-% fine fraction), CF_035_020045_009 (in-situ dewatering, 100 vol.-% fine fraction, total filter cake), CF_035_020045_010 (in-situ dewatering, 100 vol.-% fine fraction, total filter cake), CF_035_020200_02_001 (in-situ filtration and dewatering, 20 vol.-% fine fraction), CF_035_020200_02_004 (in-situ dewatering, 20 vol.-% fine fraction, total filter cake), CF_035_020200_02_011 (in-situ dewatering, 20 vol.-% fine fraction, total filter cake), CF_035_020200_03_005 (in-situ dewatering, 30 vol.-% fine fraction, total filter cake), CF_035_020200_04_002 (in-situ filtration and dewatering, 40 vol.-% fine fraction), CF_035_020200_04_006 (in-situ dewatering, 40 vol.-% fine fraction, total filter cake), CF_035_020200_04_009 (in-situ dewatering, 40 vol.-% fine fraction, total filter cake), CF_035_020200_05_007 (in-situ dewatering, 50 vol.-% fine fraction, total filter cake), CF_035_020200_06_003 (in-situ filtration and dewatering, 60 vol.-% fine fraction), CF_035_020200_06_008 (in-situ dewatering, 60 vol.-% fine fraction, total filter cake), CF_035_020200_06_010 (in-situ dewatering, 60 vol.-% fine fraction, total filter cake), CF_035_055200_013 (in-situ filtration and dewatering, 0 vol.-% fine fraction), CF_035_055200_015 (in-situ dewatering, 0 vol.-% fine fraction, total filter cake), CF_035_055200_022 (in-situ dewatering, 0 vol.-% fine fraction, total filter cake) | |
| Additional keywords | cake filtration, cake dewatering, X-ray tomography, in-situ, VDI 2762 | |
| Language | eng | |
| Year or period of data production | 2018-2019 | |
| Publication year | 2021 | |
| Publisher | Technical University Bergakademie Freiberg - Institute of Mechanical Process Engineering and Mineral Processing | |
| References on related materials | IsSourceOf: 10.1007/s11242-021-01600-7 (DOI) | |
| Content of the research data | Dataset: X-ray tomography scans of filter cakes (.tiff stacks) | |
| Holder of usage rights | Technical University Bergakademie Freiberg - Institute of Mechanical Process Engineering and Mineral Processing | |
| Usage rights of the data | CC-BY-4.0 | |
| Software | Resource Production: Xradia XMReconstructor 10.7 | |
| Additional precise description of discipline | mechanical process engineering - solid-liquid separation - cake filtration and dewatering | |
| Discipline(s) | Engineering | de |
| Title of the dataset | X-ray tomography scans of filter cakes (feed slurry: variation in fraction of fines) |
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Publication B: Neighborhood Relationships of Widely Distributed and Irregularly Shaped Particles in Partially Dewatered Filter Cakes [1]
A more thorough understanding of the properties of bulk material structures in solid–liquid separation processes is essential to understand better and optimize industrially established processes, such as cake filtration, whose process outcome is mainly dependent on the properties of the bulk material structure. Here, changes of bulk properties like porosity and permeability can originate from local variations in particle size, especially for non-spherical particles. In this study, we mix self-similar fractions of crushed, irregularly shaped Al2O3 particles (20 to 90 μm and 55 to 300 μm) to bimodal distributions. These mixtures vary in volume fraction of fines (0, 20, 30, 40, 50, 60 and 100 vol.%). The self-similarity of both systems serves the improved parameter correlation in the case of multimodal distributed particle systems. We use nondestructive 3D X-ray microscopy to capture the filter cake microstructure directly after mechanical dewatering, whereby we give particular attention to packing structure and particle–particle relationships (porosity, coordination number, particle size and corresponding hydraulic isolated liquid areas). Our results reveal widely varying distributions of local porosity and particle contact points. An average coordination number (here 5.84 to 6.04) is no longer a sufficient measure to describe the significant bulk porosity variation (in our case, 40 and 49%). Therefore, the explanation of the correlation is provided on a discrete particle level. While individual particles < 90 μm had only two or three contacts, others > 100 μm took up to 25. Due to this higher local coordination number, the liquid load of corresponding particles (liquid volume/particle volume) after mechanical dewatering increases from 0.48 to 1.47.