Results 21 to 30 of about 842,823 (269)

Crack-free caustic magnesia-bonded refractory castables [PDF]

Ceramics International, 2021
A growing interest in designing high-alumina MgO-bonded refractory castables has been identified in recent years due to the magnesia ability to react: (i) with water at the initial processing stages of these materials (inducing the precipitation of ...
V. C. Miguel, D. Fini, V. Pinto, M. H. Moreira, V. Pandolfelli, A. Luz   +5 more
semanticscholar   +1 more source

Fundamental Investigations on the High-Temperature Corrosion of Spinel-Forming Alumina Castables by Steel Slags

Applied Sciences, 2022
This study investigated the effect of the CaO/SiO2 mass ratio of steel slag on the corrosion behavior of spinel-forming alumina-based castables with a content of MgO (3–7 wt.%).
Jakub Ramult, Klaudia Wiśniewska-Tobiasz, Ryszard Prorok, Dominika Madej   +3 more
doaj   +1 more source

Investigation of the role of impurities typical in secondary raw materials on the behaviour of high alumina castables - Part II: Influence on thermomechanical behaviour

Open Ceramics, 2023
The present work investigated the effect of relatively small additions of impurities originating in secondary raw materials on the thermomechanical properties of alumina castables bonded with active alumina.
Jacek Podwórny, Karolina Dudek, Magdalena Kujawa, Robert Kusiorowski, Erwan Brochen, Christian Dannert, Olaf Krause, Laura Erbar, Katharina Sarnow   +8 more
doaj   +1 more source

Synthesis of in-situ high-content carbon-containing calcium aluminate cement and its effect on the properties of Al2O3-SiC-C castables

Journal of Asian Ceramic Societies, 2021
The in-situ high-content carbon-containing calcium aluminate cement (HCCAC) with the carbon content of 20.1 wt.% was prepared by the soft chemistry method with citric acid, calcium carbonate, and alumina as raw materials.
Yunfei Zang, Guoqing Xiao, Donghai Ding, Jianying Gao, Changkun Lei, Jianjun Chen, Jiyuan Luo, Shoulei Yang   +7 more
doaj   +1 more source

Digital image correlation applied to in situ evaluation of surface cracks upon curing of MgO-containing refractory castables

Journal of the European Ceramic Society, 2021
MgO particles are added to high-alumina castables to provide in situ spinel formation at high temperatures. However, the MgO hydration upon curing may damage the material because of localized volumetric expansion.
V. Sciuti, F. Hild, V. Pandolfelli, T. Santos, B. Smaniotto, R. B. Canto   +5 more
semanticscholar   +1 more source

The Effect of Chelate Compounds on the Hydration Process of MgO–Al₂O₃ Phase System under Hydrothermal Conditions

Applied Sciences, 2021
In refractory castables during heat treatment, there is a dynamic change from a hydraulic bond to a ceramic bond. During heating, the emission of water takes place; this changes the conditions inside the material to something similar to the hydrothermal ...
Ryszard Prorok, Jakub Ramult, Wieslawa Nocun-Wczelik, Dominika Madej   +3 more
doaj   +1 more source

Novel colloidal silica technology for MgO-containing refractories – Part 1: Anti-hydroxylation binder

Open Ceramics, 2023
Refractory castables play major roles in high-temperature applications and two important types are MgO-containing and colloidal silica-bonded castables.
Rafael Salomão, Isabela S. Martinatti, Leandro Fernandes, Sundblom Andreas, Peter Greenwood, Paulo R.T. Tiba   +5 more
doaj   +1 more source

Deflocculants for refractory castables (review)

Scientific research on refractories and technical ceramics, 2020
Review and analysis of foreign studies aimed at researching the influence of various deflocculants on properties of refractоry castables have been executed. Technological efficiency of deflocculants application had been shown:– ADS/W brands comparison to polyacrylate and sodium threepolyphosphate in alumina-cement-based mixture in terms mass`s humidity
S. V. Chaplianko, V. V. Nikichanov
openaire   +1 more source

Effect of in-situ carbon containing calcium aluminate cement on properties of Al2O3-SiC-C based trough castables

Journal of Asian Ceramic Societies, 2020
The properties of Al2O3-SiC-C castables bonded by in-situ carbon containing calcium aluminate cement (CCAC) were investigated in this study. The results showed that after the Al2O3-SiC-C castables were dried at 110°C, their cold crushing strength (CCS ...
Shoulei Yang, Guoqing Xiao, Donghai Ding, Jianying Gao   +3 more
doaj   +1 more source

Direct comparison of multi and single-phase models depicting the drying process of refractory castables

, 2021
Refractory castables are crucial for the production of steel and other materials. Upon heating, pressurization of vapor within their pores is developed, which may lead to cracks and even explosions.
M. H. Moreira, Stefano Dal Pont, R. Ausas, T. Cunha, A. Luz, V. Pandolfelli   +5 more
semanticscholar   +1 more source