Detail publikace

Development and Properties of New Mullite Based Refractory Grog

ZEMÁNEK, D. LANG, K. TVRDÍK, L. VŠIANSKÝ, D. NEVŘIVOVÁ, L. ŠTURSA, P. KOVÁŘ, P. KERŠNEROVÁ, L. DVOŘÁK, K.

Originální název

Development and Properties of New Mullite Based Refractory Grog

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

mullite; refractory; high-alumina grog; kaolin; claystone

Autoři

ZEMÁNEK, D.; LANG, K.; TVRDÍK, L.; VŠIANSKÝ, D.; NEVŘIVOVÁ, L.; ŠTURSA, P.; KOVÁŘ, P.; KERŠNEROVÁ, L.; DVOŘÁK, K.

Vydáno

7. 2. 2021

Nakladatel

MDPI

Místo

Switzerland

ISSN

1996-1944

Periodikum

Materials

Ročník

14

Číslo

4

Stát

Švýcarská konfederace

Strany od

1

Strany do

15

Strany počet

15

URL

https://www.mdpi.com/1996-1944/14/4/779

Plný text v Digitální knihovně

http://hdl.handle.net/11012/196748

BibTex

@article{BUT169215,
  author="David {Zemánek} and Karel {Lang} and Lukáš {Tvrdík} and Dalibor {Všianský} and Lenka {Nevřivová} and Petr {Štursa} and Pavel {Kovář} and Lucie {Keršnerová} and Karel {Dvořák}",
  title="Development and Properties of New Mullite Based Refractory Grog",
  journal="Materials",
  year="2021",
  volume="14",
  number="4",
  pages="1--15",
  doi="10.3390/ma14040779",
  issn="1996-1944",
  url="https://www.mdpi.com/1996-1944/14/4/779"
}