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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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Project of silo for powdery materials
Vydra, Jan ; Malach, František (referee) ; Malášek, Jiří (advisor)
This diploma thesis is solving systems design of silo for powdery materials. There is analysis of type choise and silo construction, dimension design and silo strenght calculation. There are described the possibility of emptying the vaults and ways to suppress the possible emergence of the vault using aktive and passive elements, that condustive to flow. It also describes active and passive stress state of the material in the silo. There are evaluated various options for editing the silo for different materials.
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Design of veritcal belt conveyor for powdery material
Tulis, Tomáš ; Kočiš, Petr (referee) ; Lán, Radek (advisor)
The aim of this bachelor’s thesis is to design a vertical belt conveyor for powdery materials with the transport capacity of 100 000 kg.h-1 and the axial distance between the drums of 40 m and height difference of 37 m. The thesis includes a brief description of conveyor belts and their components, design of the main parts of the conveyor, design of the drive of the conveyor according to the standard ČSN ISO 5048 and the calculation of the main structural nodes of the conveyor.
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Design of veritcal belt conveyor for powdery material
Tulis, Tomáš ; Kočiš, Petr (referee) ; Lán, Radek (advisor)
The aim of this bachelor’s thesis is to design a vertical belt conveyor for powdery materials with the transport capacity of 100 000 kg.h-1 and the axial distance between the drums of 40 m and height difference of 37 m. The thesis includes a brief description of conveyor belts and their components, design of the main parts of the conveyor, design of the drive of the conveyor according to the standard ČSN ISO 5048 and the calculation of the main structural nodes of the conveyor.
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Project of silo for powdery materials
Vydra, Jan ; Malach, František (referee) ; Malášek, Jiří (advisor)
This diploma thesis is solving systems design of silo for powdery materials. There is analysis of type choise and silo construction, dimension design and silo strenght calculation. There are described the possibility of emptying the vaults and ways to suppress the possible emergence of the vault using aktive and passive elements, that condustive to flow. It also describes active and passive stress state of the material in the silo. There are evaluated various options for editing the silo for different materials.
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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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