Compressibility and flow properties of a cohesive limestone powder in a medium pressure range

Grossmann, Lilla; Tomas, Jürgen; Csõke, Barnabás

doi:10.1007/s10035-004-0164-z

Cited by 16 publications

(8 citation statements)

References 4 publications

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“…The results of both analyses are in a perfect agreement (Malvern Mastersizer 3000 -DV(10)= 6.65 µm, DV(50)= 27.8 µm, DV(90)= 151 µm). The properties of the experimental material are given in [15], and were identified by standard procedures [16][17][18][19][20].…”

Section: Experimental Materialsmentioning

confidence: 99%

Study of Samples Strength of Material Formed by the Processes of Compaction, Extrusion and Tumbling Granulation

et al. 2019

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In a period of industrial expansion, protection of the environment is often neglected during the mass manufacture of products. One of the problems of our society that is necessary to face at present is the provision, processing and then usage of waste composed of fine particles that are extremely dangerous for mankind. This study looks at the processing of the fine dust resulting from the manufacture of brake pads. The selected technologies for the process of dust treatment were compaction, extrusion and tumbling granulation, and their consequent comparison with the strength of a break and disintegration of agglomerates from fine dust. The experiments were performed on a unique equipment that made it possible to process such dust in the form of larger units and thus reduce their dustiness, with this dust being reintroduced into the technologies for repeat processing or used for energy processing, in a cement kiln, for example.

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Section: Experimental Materialsmentioning

confidence: 99%

Study of Samples Strength of Material Formed by the Processes of Compaction, Extrusion and Tumbling Granulation

et al. 2019

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“…During compaction, two main processes occur, i.e., compression and consolidation. The compressibility is the ability of a particle bed to reduce its volume due to rearrangement, deformation, and breakage under pressure [1,2]. The consolidation is characterized by the formation of inter-particle interactions; it describes the ability of a powder bed to form mechanically durable bonds with sufficient strength [1,3].…”

Section: Introductionmentioning

confidence: 99%

“…Compaction of a particle bed depends not only on the physical properties of the particles but also on the apparatus setting [4] like filling method. In this process, the rate of increase and also the absolute magnitude of the applied pressure force play significant roles [1]. Additionally, the pre-conditioning of the particle bed before applying the compression force has a critical effect on the final results [4].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Very Cohesive Ultra-Fine Particles in Mixtures on Compression, Consolidation, and Fluidization

et al. 2019

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This paper focuses on the effect of ultra-fine ( d < 10 µm) powders in mixtures with fine ( d < 100 µm) bulk material on compression processes and also evaluates the re-fluidization behavior of the compressed bed (history effect). Achieving this goal, different mixtures of fine and ultra-fine Ground-Carbonate-Calcium were compressed at three pressure levels. The results show that by increasing the applied pressure, the compressibility decreases due to change in compaction regime. Subsequently, for the higher pressure, the slope of packing density versus applied stress curves is noticeably different. However, this slope does not depend on the size distribution of mixtures, but on the type of material. Comparing fluidization and re-fluidization curves (bed pressure drop vs. gas velocity) shows an increase in the maximum bed pressure drop ( Δ P p e a k ) for re-fluidization. By increasing the portion of ultra-fine particles in the binary mixture, Δ P p e a k increases in a non-linear manner. Furthermore, the incipient fluidization point moves to a higher gas velocity. After compression, the peak of the bed pressure drop in the re-fluidization test happens at a lower gas velocity than in the initial fluidization test. Thus, the slope of the loading curve is much larger for re-fluidization. The opposite is observed for the unloading curves.

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“…The measuring of compressibility was carried out on a powder materials rheotest, the Freeman Technology FT4 [21][22][23][24]. The sample of pure raw material and also the prepared product were compressed by a piston with a very fine perforated surface to allow the escaping of air from the investigated material.…”

Section: Compressibility Of Pure Raw Materials and Created Productmentioning

confidence: 99%

Modification of Powder Material by Compaction Processing

et al. 2017

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Abstract. There are different criteria for assessing the appropriateness of an agglomeration technology in the deployment processing of dry, fine and dirty dust burdening in the communal and working environment. Besides the benefit of the environment components, the agglomeration technology offers the possibility of re-processing the material as the primary raw material within a wide range of industries. Preliminary tests have shown that the compressed material remains in the memory from the previous compression. For returning the already processed material into a primary production, it is essential that it is reformed without the need for additional materials, a requirement that can be problematic. This article deals with the modification of a powder material (powder dust from the manufacture of friction components) and the investigation of its properties before and after the compaction processing.

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Compressibility and flow properties of a cohesive limestone powder in a medium pressure range

Cited by 16 publications

References 4 publications

Study of Samples Strength of Material Formed by the Processes of Compaction, Extrusion and Tumbling Granulation

Study of Samples Strength of Material Formed by the Processes of Compaction, Extrusion and Tumbling Granulation

The Effect of Very Cohesive Ultra-Fine Particles in Mixtures on Compression, Consolidation, and Fluidization

Modification of Powder Material by Compaction Processing

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