The general trend toward the use of self-flowing castables in high-temperature plant is based on the development and use of self-flowing basic bodies based on MgO or MgO spinels, respectively. A targeted use of dispersing agents can reduce the hydration tendency of MgO effectively. The use of sinter magnesia in the coarse grain range and fused magnesia in the ultra fine grain range results in an optimised solution for the lattice grain. For the binder matrix, the use of a reactive alumina mixture is well-suited, one with which the MgO almost completely reacts forming spinel. Observing the grain distribution of the ultrafine grain portion, self-flowing bodies can be achieved with an amount of slump equal to 100 %, having 8 % moisture content. These bodies containing 70 % MgO result in the highest level of microstructural formations and high temperature properties when dried and pre-fired at 850℃ and 1 500℃ respectively. The bodies should be able to be used at temperatures significantly above 1500℃.
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