The ceramic setting binders obtained by means of the raw mix mechano-chemical processing (mechanical dispersion and chemical interaction processes combination),used for bonding refractory concretes,become more available with a subsequent increased interest in their properties because they develop initial strength during a heat up of the units within 8-10 h,in contrast to 24 h after placement for high Al2O3 cements (HAC).This strength development enables high temperature processing units to be relined with minimum turnaround time,thus providing a favored cost/performance ratio.The present paper identifies the predominant phosphate phases responsible for developing good mechanical-strength properties of zirconia and alumina concretes bonded with mechano-chemical binders.It sets out the colloid and crystalline phases resulted from interphase interaction that provide the basis for high concentrated bonding suspensions (HCBS) technology useful to the refractory industry.
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