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Properties and micropurity of steels produced using vacuum metallurgy
Krontorád, Jakub ; Pernica, Vítězslav (referee) ; Záděra, Antonín (advisor)
This master thesis contains analysis of metallurgical quality of medium alloyed steel from the perspective of microcleanliness and content of dissolved gases. Apart from thorough research there are result of three melts from vacuum induction furnace (VCAP-Consarc), from which, conclusions are made. Each of the scrap material types (steel scrap, VD scrap and ESR scrap) had different metallurgical quality and initial microcleanliness, which influenced the final quality of the ingot. Lastly both degassing process and the thermodynamical probability of the reaction of silicon-oxide based sampling pipe with melt has been examined and calculated.
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Historical development of steel manufacturing processes from the Middle Ages
Závodná, Marie ; Pešek, Jakub (referee) ; Šenberger, Jaroslav (advisor)
This thesis was written during my bachelor studies of mechanical technology at the Faculty of Mechanical Engineering in Brno. The topic was processed on the basis of professional literature and accessible web servers, which deal with the linear analysis of steel production principles since the Middle Ages and with theis sues of steel reduction and oxidation processes. Contemporary modern steel fabrication procedures are based on simile principles to those which have been used fort hefabrication of steel since thediscovery of iron.
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System control and protection turbo generators
Veverka, Marek ; Panáč, Martin (referee) ; Matoušek, Antonín (advisor)
The topic of this thesis is description, analysis and proposal of turbo generator’s control and protection system. The power output of turbo generators is from 3 MVA up to 75 MVA for various industrial sectors. The final proposal is based on the results of this analysis and it consists of a modern control and protection turbo generators systems. This proposal is designed to respect universality, customer’s requirements. And this proposal should be used in many industry branches.
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Secondary metallurgy in foundries
Klika, Jiří ; Šenberger, Jaroslav (referee) ; Pernica, Vítězslav (advisor)
The aim of this bachelor thesis is to write a literary research about various methods of secondary metallurgy. In the thesis is described principle of methods and its advantages and disadvantages after installation in the manufactory, especially principle of steelmaking methods. It mainly concerns advantages of secondary metallurgy as degassing, decarburisation, desulphurisation and chemical or heat homogenization of liquid metal in the ladle.
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Scoring of the Firm’s Financial Risk
Dodek, Radim ; Kříž, Václav (referee) ; Režňáková, Mária (advisor)
This Bachelor diploma is focused on comparison of chosen scoring indicators and selecting those, which describes the real financial situation of the metallurgical companies. The output of the diploma is to compare particular. Visual Basic application has been developed to counting scoring indicators.
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Technology and production of Roman provincial brooches from Noricum and Pannonia
Srbová, Lucie ; Musil, Jiří (advisor) ; Titz, Pavel (referee)
This bachelors thesis is concerned with the technology of non-ferrous metal processing and their alloys in Roman era. Describes centres of mining in the area of Roman provinces Noricum and Pannonia as well as production of brooches in these provinces. Main goals are to review and appreciate technology and partly typology of a Roman provincial set of brooches from collection of Institute of Classical Archaeology of Charles University in Prague utilizing non-destructive analytical methods and to create a reference file based on results of the analysis and assessment of effectiveness of methods used with regard to possible future research. Elemental composition of given brooches was established using energy- dispersive spectroscopy (EDS), electron microscopy (SEM) and radiography (RTG). Results as well as interpretation are presented as catalogue. Key words: Roman archaeology, brooches, roman technology, metallurgy
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Workers'and Trade Union Press in the Kladno Region in the Interwar Period
Borová, Zuzana ; Končelík, Jakub (advisor) ; Bednařík, Petr (referee)
This master's thesis addresses the functioning of the workers' press in Kladno District during the interwar period (1918-1938). The theoretical part describes early days of mining and metallurgical industry in this region with a special attention being paid to the development of the Pražská železářská společnost and Poldina huť. Furthermore, this chapter outlines the growth of the town Kladno and its national composition until the end of the researched period. The chapter continues with providing a detailed description of work and private lives of Kladno workmen during the First Czechoslovak Republic. Trade unions and changes in legislation are discussed as they directly impacted the key professions in Kladno District - miners and steelworkers. Finally, the last section of the theoretical part is dedicated to the beginnings of the workers' press in the region, namely the paper Svoboda which played an essential role in this area. The practical part studies five titles from Kladno District, for which the local workmen constituted the target audience. Dělnické listy, Stráž svobody, Naše hory hutě - Horník, Strojník a topič, and Poldi Nachrichten were chosen as they represented various groups of publishers (political parties, trade unions, or organizations). The opinions towards the workmen's interests...
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Microstructural Study and Analysis of Hard Zinc
Luptáková, Natália ; Pešlová, F. ; Stodola, P. ; Stodola, J.
The presented work is focused on the character and morphology of the input material for the production of metallic zinc which is used in the production of ZnO through indirect pyrometallurgical processes. The input material is the key parameter in the production of high-quality zinc oxide. For the prediction of a complex production process when problematic situation may occur, the systematic analysis of the input zinc raw materials is needed. Undesirable phases in the feedstock can be identified through profound recognition of the source material and the nature of its microstructure. Chemical composition of zinc metal and zinc additives helps to detect the phases occurring in the matrix. Undesirable phases in the feedstock can form hard and brittle compounds. If these compounds diffuse into the lining during thermal processes, they become the cause of stress in metallurgical ceramics. From the microstructure viewpoint, the heterogeneity of the grain size, various morphology of intermediate phases, their layout, arrangement, etc. can be expected. The results obtained by analysis are used to minimize waste-zinc slag and to eliminate the conditions which enable the formation of the undesired product, thereby increasing the productivity of the zinc oxide production. Moreover, another important knowledge could be used for modernization and effective the process of industrial production of ZnO in practical application in military technologies.
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Vojtech Lanna: Image of Enterpriser in First Phase of Instrustry Revolution
Veithová, Kamila ; Matoušek, Václav (advisor) ; Bezecný, Zdeněk (referee)
This Thesis is a contribution to the research of Entrepreneurship and its impact on process of historical change. The paper focuses on life and career of the South Bohemian Entrepreneur, Industrialist and Patron Vojtěch (Adalbert) Lanna. By examining his life it is possible to explore wider social processes leading to fundamental social change, based on switching from feudal to modern arrangement of state and society. Vojtěch Lanna begins his career, like many of his ancestors, as a salt carrier. Later he manages to run his own business, based on river transportation and water engineering, which allowes him to accumulate enough capital to enter other industrial sectors. During his later life he participates on to the construction of railways, later he focuses on coal mining. His biggest achievements is building of modern ironworks named Vojtěšská huť. Throughout his life he runs many other business that are related to his main lifelong activities. He is also known for his charity and a humane approach. He supports education, music and art. His life and his business activities is a reflection of the economic development of the first half and the beginning of the second half of 19th century.
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Technology and production of Roman provincial brooches from Noricum and Pannonia
Srbová, Lucie ; Musil, Jiří (advisor) ; Titz, Pavel (referee)
This bachelors thesis is concerned with the technology of non-ferrous metal processing and their alloys in Roman era. Describes centres of mining in the area of Roman provinces Noricum and Pannonia as well as production of brooches in these provinces. Main goals are to review and appreciate technology and partly typology of a Roman provincial set of brooches from collection of Institute of Classical Archaeology of Charles University in Prague utilizing non-destructive analytical methods and to create a reference file based on results of the analysis and assessment of effectiveness of methods used with regard to possible future research. Elemental composition of given brooches was established using energy- dispersive spectroscopy (EDS), electron microscopy (SEM) and radiography (RTG). Results as well as interpretation are presented as catalogue. Key words: Roman archaeology, brooches, roman technology, metallurgy
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