Update on the Use of Spherical Particles in NCC

Hong Peng, Bjørn Myhre

Elkem Silicon Materials, Kristiansand/Norway


Volume 10, Issue 4, Pages 59 - 66


No­cement castables have the last few years become increas­ ingly popular, particularly since the introduction of SioxX ­Zero (microsilica­gel bond) and DAReS (Dry Advanced Refractory System) binder technologies. In parallel with the development of these binder systems, development of highly specialised raw materials has progressed, and the current paper focuses on the use of spherical alumina for no­cement applications in general, and silica­free corundum­spinel systems in particular.


microalumina, spherical alumina


[1] Myhre, B.; Sunde, K.: Alumina based castables with very low contents of hydraulic compound. Part I: The effect of binder and particle­size distribution on fow and set. Proc. UNITECR´95, Kyoto, Japan, 19–22 Nov. 1995, II/309–316 [2] Myhre, B.: Particle shape and its significance for the rheology of refractory castables. Proc. ALAFAR 2012, Cancún, Mexico, 2012 [3] Myhre, B.; Peng, H.: Refractory gel­bonded castables with reduced amount of water and higher fow. Proc. UNITECR’2015, Vienna, Austria, Sept. 2015 [4] Pagliosa, C.; Myhre, B.; Pandolfelli, V.C.: Dry advanced refractory system (DARES) technology: all in one alumina gel castable. Proc. 59th Int. Coll. on Refractories, Aachen, Germany, 28–29 Sept. 2016 [5] Myhre, B.; Peng, H.: Update of spherical particles in NCC. Proc. 54 Annual Symposium on Refractories. Amer. Ceram. Soc., 21–22 March 2018


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