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@article{1765639,
author = {Zemánek, David and Lang, Karel and Tvrdík, Lukáš and Všianský, Dalibor and Nevřivová, Lenka and Štursa, Petr and Kovář, Pavel and Keršnerová, Lucie and Dvořák, Karel},
article_number = {4},
doi = {http://dx.doi.org/10.3390/ma14040779},
keywords = {mullite; refractory; high-alumina grog; kaolin; claystone},
language = {eng},
issn = {1996-1944},
journal = {Materials},
title = {Development and Properties of New Mullite Based Refractory Grog},
url = {https://www.mdpi.com/1996-1944/14/4/779},
volume = {14},
year = {2021}
}
TY - JOUR
ID - 1765639
AU - Zemánek, David - Lang, Karel - Tvrdík, Lukáš - Všianský, Dalibor - Nevřivová, Lenka - Štursa, Petr - Kovář, Pavel - Keršnerová, Lucie - Dvořák, Karel
PY - 2021
TI - Development and Properties of New Mullite Based Refractory Grog
JF - Materials
VL - 14
IS - 4
SP - "779"
EP - "779"
PB - MDPI
SN - 19961944
KW - mullite
KW - refractory
KW - high-alumina grog
KW - kaolin
KW - claystone
UR - https://www.mdpi.com/1996-1944/14/4/779
N2 - The presented study is focused on optimization and characterization of a high-alumina refractory aggregate based on natural raw materials-kaolins, claystone, and mullite dust by-product (used to increase the alumina and mullite contents, respectively). In total, four individual formulas with the Al2O3 contents between 45 and 50 wt.% were designed; the samples were subsequently fired, both in a laboratory oven and an industrial tunnel furnace. The effects of repeated firing were examined during industrial pilot tests. Mineral and chemical compositions and microstructures, of both the raw materials and designed aggregates, were thoroughly investigated by the means of X-ray fluorescence spectroscopy, powder X-ray diffraction, and optical and scanning electron microscopies. Porosity, mineral composition, and mullite crystal-size development during the firing process were also studied. Based on the acquired results, the formula with the perspective to be used as a new mullite grog, featuring similar properties as the available commercial products, however, with reduced production expenses, was selected. The quality of grog determines to a large extent the properties of the final product. Hence, optimization of aggregates for specific refractories is of a great importance. The production of engineered aggregates provides the opportunity to utilize industrial by-products.
ER -
ZEMÁNEK, David, Karel LANG, Lukáš TVRDÍK, Dalibor VŠIANSKÝ, Lenka NEVŘIVOVÁ, Petr ŠTURSA, Pavel KOVÁŘ, Lucie KERŠNEROVÁ a Karel DVOŘÁK. Development and Properties of New Mullite Based Refractory Grog. \textit{Materials}. MDPI, 2021, roč.~14, č.~4, s.~''779'', 15 s. ISSN~1996-1944. Dostupné z: https://dx.doi.org/10.3390/ma14040779.
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