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Agglomeration of animal feed mixtures
Moravec, Jan ; Lacina,, Lubor (referee) ; Svěrák, Tomáš (advisor)
The theoretical part of this work focuses on the description of mechanical properties of compound feed produced in cooperation with Mendel University in Brno. These properties are mainly flow properties, which are crucial for the technological processes of these mixtures. The first part of this work also contains a general information about commonly used shear devices. Jenike's Shear Cell and Rheometer FT4 from company Freeman Technology are described in more detail. Because of the complexity of the behavior of these materials, their properties are mostly found the experimental way, which is the main topic of the practical part of this work. In this section you can find a description of measurements performed on Jenike's Shear Cell and on the Rheometer FT4. Moreover measurements of strength and length of granules were undertaken. Further the analysis of powder feed mixtures on sieves is described. Materials analyzed were compound feeds for chickens. Mutually they differed in the content of mealworms. Pellets were made from the mixtures and were then also subjected to measurement.
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Bulk properties of selected particulate matter from the point of view of various measuring techniques
Bógyiová, Csilla ; Fekete,, Roman (referee) ; Svěrák, Tomáš (advisor)
This thesis focuses on particular materials and their flow properties. Handling of powder materials has an impact on technologic processes like storage, transport or dosage. In pharmacy flow properties are used for tabletting process of pills. For a correctly designed technologic process it is necessary to know the flow behaviour of powder materials. Measuring is the best way to study flow properties. The most commonly used instrument for measuring flowability are described in this thesis. Two different devices (Jenike shear device and Freeman FT4) were used to perform the experiments for the comparison of results. The tested materials were particular materials used in pharmacy. To further expand upon the research and to represent the importance of flowability, enclose to this work is a report regarding the examination of pyrolysis coke analyse from MOL Slovnaft.
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Bulk properties of fine particulate solids in the industrial practice.
Bógyiová, Csilla ; Krištof, Ondřej (referee) ; Svěrák, Tomáš (advisor)
This thesis focuses on the description of the characteristics and flow properties of powder materials. The study of powder material’s flow properties is demanding and hard. For a correctly designed technologic process it is necessary to know the flow behaviour of powder materials. Measuring is the best way to study flow properties. The aim of this thesis is to acquaintance the instruments which measure flow properties. Theoretical part of the thesis describes particular materials, ring shear tests with Jenike Shear Cell and evaluation using Mohr’s circles. Experiments were performed on two samples from the industrial practice. These samples are instant teas of various flavour. Attention was paid to the influence of humidity on the flowability of the materials. Results demonstrate that surface characteristics and humidity changes the flow behaviour of bulk properties. Consequently it is necessary to pay attention to these factors when technologic process is designed.
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Bulk properties of fine particulate solids as the function of the selected material parameters.
Slanina, Ondřej ; Roman,, Fekete (referee) ; Svěrák, Tomáš (advisor)
The theoretical part of the thesis focuses on the description of particulate materials and their mechanical behaviors with a focus on flow properties. Great emphasis is placed on measuring the shear properties using a Jenike shear machine, on the correct procedure for standardized measurement and evaluation using Mohr's circles. The theoretical part focuses on the characterization of particulate matter using a variety of methods available, such as visual, separation, sedimentation, surface methods and methods of scanning field and flow. The practical part is focused on the determination of flow characteristics and surface finishing of finely ground limestone Omyacarb VA with various grain sizes. The surface was modified using stearic acid and calcium stearate. Attention was paid to the influence of the concentration of surface-regulating substances on the flowability of the material. The flowability of commercially supplied material was compared with lab modified materials and the determination of the theoretical content of stearic acid or calcium stearate was accomplished. Shear properties were measured using the Jenike shear machine. The material was further tested by laser diffraction and SEM with EDS particle surface analysis and elemental surface mapping.
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Bulk properties of fine powders.
Zubek, Piotr ; Roman,, Fekete (referee) ; Svěrák, Tomáš (advisor)
The subject of this thesis is the measurement of flow properties of powder materials. The theoretical part deals with particulate substances in general and describes the basic principles of flow behavior of powder materials. In the theoretical part is a description of the Jenike Shear Tester and Ring Shear Tester. The following section summarizes the Standard Shear Testing Technique. Measurements were carried out on the new apparatus Laboratory of Chemical Engineering. The measurement was selected 5 samples of limestone Omyacarb ® from Omya CZ s.r.o. Individual samples varied in four different particle size distributions and one sample was surface-modified hydrophobic stearic acid. Tests were conducted at 3 levels of the preshear normal stress - 2.5 kPa, 5 kPa and 7.5 kPa. Distribution function of particle size in the material data sheets supplied by the manufacturer were verified using a laser particle size analyzer Sympatec Helos KR purchased in the Materials Research Centre at the Faculty of Chemistry at Brno University of Technology.
|
|
|
Agglomeration of animal feed mixtures
Moravec, Jan ; Lacina,, Lubor (referee) ; Svěrák, Tomáš (advisor)
The theoretical part of this work focuses on the description of mechanical properties of compound feed produced in cooperation with Mendel University in Brno. These properties are mainly flow properties, which are crucial for the technological processes of these mixtures. The first part of this work also contains a general information about commonly used shear devices. Jenike's Shear Cell and Rheometer FT4 from company Freeman Technology are described in more detail. Because of the complexity of the behavior of these materials, their properties are mostly found the experimental way, which is the main topic of the practical part of this work. In this section you can find a description of measurements performed on Jenike's Shear Cell and on the Rheometer FT4. Moreover measurements of strength and length of granules were undertaken. Further the analysis of powder feed mixtures on sieves is described. Materials analyzed were compound feeds for chickens. Mutually they differed in the content of mealworms. Pellets were made from the mixtures and were then also subjected to measurement.
|
|
|
Bulk properties of selected particulate matter from the point of view of various measuring techniques
Bógyiová, Csilla ; Fekete,, Roman (referee) ; Svěrák, Tomáš (advisor)
This thesis focuses on particular materials and their flow properties. Handling of powder materials has an impact on technologic processes like storage, transport or dosage. In pharmacy flow properties are used for tabletting process of pills. For a correctly designed technologic process it is necessary to know the flow behaviour of powder materials. Measuring is the best way to study flow properties. The most commonly used instrument for measuring flowability are described in this thesis. Two different devices (Jenike shear device and Freeman FT4) were used to perform the experiments for the comparison of results. The tested materials were particular materials used in pharmacy. To further expand upon the research and to represent the importance of flowability, enclose to this work is a report regarding the examination of pyrolysis coke analyse from MOL Slovnaft.
|
|
|
Bulk properties of fine particulate solids in the industrial practice.
Bógyiová, Csilla ; Krištof, Ondřej (referee) ; Svěrák, Tomáš (advisor)
This thesis focuses on the description of the characteristics and flow properties of powder materials. The study of powder material’s flow properties is demanding and hard. For a correctly designed technologic process it is necessary to know the flow behaviour of powder materials. Measuring is the best way to study flow properties. The aim of this thesis is to acquaintance the instruments which measure flow properties. Theoretical part of the thesis describes particular materials, ring shear tests with Jenike Shear Cell and evaluation using Mohr’s circles. Experiments were performed on two samples from the industrial practice. These samples are instant teas of various flavour. Attention was paid to the influence of humidity on the flowability of the materials. Results demonstrate that surface characteristics and humidity changes the flow behaviour of bulk properties. Consequently it is necessary to pay attention to these factors when technologic process is designed.
|
|
|
Bulk properties of fine particulate solids as the function of the selected material parameters.
Slanina, Ondřej ; Roman,, Fekete (referee) ; Svěrák, Tomáš (advisor)
The theoretical part of the thesis focuses on the description of particulate materials and their mechanical behaviors with a focus on flow properties. Great emphasis is placed on measuring the shear properties using a Jenike shear machine, on the correct procedure for standardized measurement and evaluation using Mohr's circles. The theoretical part focuses on the characterization of particulate matter using a variety of methods available, such as visual, separation, sedimentation, surface methods and methods of scanning field and flow. The practical part is focused on the determination of flow characteristics and surface finishing of finely ground limestone Omyacarb VA with various grain sizes. The surface was modified using stearic acid and calcium stearate. Attention was paid to the influence of the concentration of surface-regulating substances on the flowability of the material. The flowability of commercially supplied material was compared with lab modified materials and the determination of the theoretical content of stearic acid or calcium stearate was accomplished. Shear properties were measured using the Jenike shear machine. The material was further tested by laser diffraction and SEM with EDS particle surface analysis and elemental surface mapping.
|
|
|
Bulk properties of fine powders.
Zubek, Piotr ; Roman,, Fekete (referee) ; Svěrák, Tomáš (advisor)
The subject of this thesis is the measurement of flow properties of powder materials. The theoretical part deals with particulate substances in general and describes the basic principles of flow behavior of powder materials. In the theoretical part is a description of the Jenike Shear Tester and Ring Shear Tester. The following section summarizes the Standard Shear Testing Technique. Measurements were carried out on the new apparatus Laboratory of Chemical Engineering. The measurement was selected 5 samples of limestone Omyacarb ® from Omya CZ s.r.o. Individual samples varied in four different particle size distributions and one sample was surface-modified hydrophobic stearic acid. Tests were conducted at 3 levels of the preshear normal stress - 2.5 kPa, 5 kPa and 7.5 kPa. Distribution function of particle size in the material data sheets supplied by the manufacturer were verified using a laser particle size analyzer Sympatec Helos KR purchased in the Materials Research Centre at the Faculty of Chemistry at Brno University of Technology.
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