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Mullite Refractory Grog
Zemánek, David ; Tvrdík,, Lukáš (referee) ; Nevřivová, Lenka (advisor)
Refractory aggregate manufactured from common clays, claystones and shales in Czech Republic are mostly classified as fireclay. For specific applications are these grogs not suitable and there is a need to use grogs with higher content of alumina oxide. Theoretical part of this thesis is focused on the mineral mullite, which is one of the basic minerals in Al2O3 - SiO2 system. Research is focused on methods of mullite production, manufacture of recfractory grog and new possibilities in modification of current raw materials. In experimental part is carried out a verification of possible production of grogs with increased alumina content according to the designed composition.
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Production of refractory aggregate in blast furnaces
Zemánek, David ; Tvrdík,, Lukáš (referee) ; Nevřivová, Lenka (advisor)
Firing of refractory aggregate takes place in blast or rotary furnaces. Raw materials for firing are refractory clays, claystones and shales. Sorting and sieving is performed before firing, in which occurs to formation of the fine clay. This waste is not useful for firing in common way in blast furnaces. Possibility, how to solve this problem, seems to be briquetting of fine clays. This method of proccesing fine clays brings with it new possibilities in refractory aggregate production. By adding a suitable correction material, such as mullite powder, special refractory grog with required properties can be produced on customers wishes.
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Mullite Refractory Grog
Zemánek, David ; Tvrdík,, Lukáš (referee) ; Nevřivová, Lenka (advisor)
Refractory aggregate manufactured from common clays, claystones and shales in Czech Republic are mostly classified as fireclay. For specific applications are these grogs not suitable and there is a need to use grogs with higher content of alumina oxide. Theoretical part of this thesis is focused on the mineral mullite, which is one of the basic minerals in Al2O3 - SiO2 system. Research is focused on methods of mullite production, manufacture of recfractory grog and new possibilities in modification of current raw materials. In experimental part is carried out a verification of possible production of grogs with increased alumina content according to the designed composition.
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Production of refractory aggregate in blast furnaces
Zemánek, David ; Tvrdík,, Lukáš (referee) ; Nevřivová, Lenka (advisor)
Firing of refractory aggregate takes place in blast or rotary furnaces. Raw materials for firing are refractory clays, claystones and shales. Sorting and sieving is performed before firing, in which occurs to formation of the fine clay. This waste is not useful for firing in common way in blast furnaces. Possibility, how to solve this problem, seems to be briquetting of fine clays. This method of proccesing fine clays brings with it new possibilities in refractory aggregate production. By adding a suitable correction material, such as mullite powder, special refractory grog with required properties can be produced on customers wishes.
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