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The admixtures which are influencing setting time of portland cement
Hlaváček, Jaroslav ; Kalina, Lukáš (referee) ; Opravil, Tomáš (advisor)
During the production of concrete is important the careful selection of raw materials. Nowadays, we are trying in the production to minimize the economic burden and to maximize the use of secondary raw materials. This work is focused on the use of secondary raw materials from the energy industry in construction for the preparation of hydraulic binders. As the main raw materials were used different power plant fly ash from fluidized combustion. The composition of these secondary materials is quite different from conventional high-temperature ash, due to mixing with water they solidify and harden. Experiments were performed with three lodge fly ash from electrostatic precipitators of the fluidized combustion and one high-temperature fly ash. This work is focused on the possibility of monitoring the use of these secondary materials in construction, especially when tests were evaluated characteristics of strength and speed of setting and hardening.
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Severance of raw material flour transportation air
Brzobohatý, Lukáš ; Fatka, Jan (referee) ; Jegla, Zdeněk (advisor)
The dissertation is focused on the applied technical and economic analysis of the influence separation of transport air from raw meal on the economy clinker/cement production, in specific cement production. The analysis is performed on the basis of a detailed understanding and analysis of the function of each component of the technology of cement production, which are affected by separation of transport air from raw meal, mainly the dosing and preheat system of the raw meal. The results of the analysis show a significant effect (impact) separation of transport air on the production costs.
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Marketing management of cement filtration technology for construction industry in Czech and Slovak republic
Beránek, Petr ; Boxhofer, Martin (referee) ; Linkeschová, Dana (advisor)
Globally, cement industry is one of the most energy consuming industries. Moreover, production of emissions as dust, CO2, NOX, SO2 and heavy metals from manufacturing process is considered as environmentally harmful. However according to predictions of World Wildlife Found (WWF) and International Energy Agency (IEA) global cement demand is going to increase in next decades. For appropriate cement industry understanding data about production of harmful emissions were collected and cement production process was described in the thesis. The thesis mainly analyzed potential for Upper Austrian Company Kappa GmbH to install dedusting system on Czech or Slovak cement plants in next 2-3 years. Kappa´s dedusting systems are able to significantly reduced dust emissions exhaust from cement plants. However as for Company Kappa GmbH cement industry is a new industry branch in which company would like to operate in future, therefore certain objectives have be to overcome. The thesis found those objectives and gives recommendations for their solutions.
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Utilization of waste heat from combustion gases for power production
Rejnuš, Vojtěch ; Škorpík, Jiří (referee) ; Pospíšil, Jiří (advisor)
Methods of utilization waste heat are increasingly on the rise and can be applied in many technologies. One of the technologies is the manufacture of cement, which is focused issue of work. Within the solution, and for understanding the problem is outlined cement production process and the analysis of the waste heat from the process, on this basis are selected a suitable method using waste heat with a closer focus on ORC units. After following evaluation and selection of the most suitable unit is made design, calculation and construction of heat exchangers. The result is the evaluation of the entire proposal.
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Utilization of waste heat from combustion gases for power production
Rejnuš, Vojtěch ; Škorpík, Jiří (referee) ; Pospíšil, Jiří (advisor)
Methods of utilization waste heat are increasingly on the rise and can be applied in many technologies. One of the technologies is the manufacture of cement, which is focused issue of work. Within the solution, and for understanding the problem is outlined cement production process and the analysis of the waste heat from the process, on this basis are selected a suitable method using waste heat with a closer focus on ORC units. After following evaluation and selection of the most suitable unit is made design, calculation and construction of heat exchangers. The result is the evaluation of the entire proposal.
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Severance of raw material flour transportation air
Brzobohatý, Lukáš ; Fatka, Jan (referee) ; Jegla, Zdeněk (advisor)
The dissertation is focused on the applied technical and economic analysis of the influence separation of transport air from raw meal on the economy clinker/cement production, in specific cement production. The analysis is performed on the basis of a detailed understanding and analysis of the function of each component of the technology of cement production, which are affected by separation of transport air from raw meal, mainly the dosing and preheat system of the raw meal. The results of the analysis show a significant effect (impact) separation of transport air on the production costs.
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|
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Marketing management of cement filtration technology for construction industry in Czech and Slovak republic
Beránek, Petr ; Boxhofer, Martin (referee) ; Linkeschová, Dana (advisor)
Globally, cement industry is one of the most energy consuming industries. Moreover, production of emissions as dust, CO2, NOX, SO2 and heavy metals from manufacturing process is considered as environmentally harmful. However according to predictions of World Wildlife Found (WWF) and International Energy Agency (IEA) global cement demand is going to increase in next decades. For appropriate cement industry understanding data about production of harmful emissions were collected and cement production process was described in the thesis. The thesis mainly analyzed potential for Upper Austrian Company Kappa GmbH to install dedusting system on Czech or Slovak cement plants in next 2-3 years. Kappa´s dedusting systems are able to significantly reduced dust emissions exhaust from cement plants. However as for Company Kappa GmbH cement industry is a new industry branch in which company would like to operate in future, therefore certain objectives have be to overcome. The thesis found those objectives and gives recommendations for their solutions.
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The admixtures which are influencing setting time of portland cement
Hlaváček, Jaroslav ; Kalina, Lukáš (referee) ; Opravil, Tomáš (advisor)
During the production of concrete is important the careful selection of raw materials. Nowadays, we are trying in the production to minimize the economic burden and to maximize the use of secondary raw materials. This work is focused on the use of secondary raw materials from the energy industry in construction for the preparation of hydraulic binders. As the main raw materials were used different power plant fly ash from fluidized combustion. The composition of these secondary materials is quite different from conventional high-temperature ash, due to mixing with water they solidify and harden. Experiments were performed with three lodge fly ash from electrostatic precipitators of the fluidized combustion and one high-temperature fly ash. This work is focused on the possibility of monitoring the use of these secondary materials in construction, especially when tests were evaluated characteristics of strength and speed of setting and hardening.
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