Compositions, technology features, and the main properties of cement-free refractory concretes (CFRC) based on a silica-sol binder are considered. Concretes of high-alumina and corundum compositions of CFRC, as well as in the Al₂O₃–SiO₂–SiC–C system predominate in this group. Improved thermal and thermomechanical properties of CFRC compared with the properties of LCRC are largely due to mullitization as a result of interaction of nanodispersed SiO₂ (silica sol and microsilica) with reactive alumina of the matrix system. Extensive and effective use of CFRC based on silica binders is achieved in blast furnace production (chutes, cold and hot shotcreted blast furnace shafts) and for lining cement production furnaces.

考虑了基于硅溶胶的无水泥耐火混凝土的成分，技术特点和主要性能。CFRC的高氧化铝和刚玉组成的混凝土以及Al ₂ O ₃ -SiO ₂ -SiC-C体系中的混凝土占主导地位。与LCRC相比，CFRC的热力学和热力学性能得到了改善，这在很大程度上是由于纳米分散的SiO ₂（硅溶胶和微硅）与基质体系的反应性氧化铝相互作用而发生了乳化作用。在高炉生产（溜槽，冷热喷射高炉竖井）和衬砌水泥生产炉中实现了基于二氧化硅粘合剂的CFRC的广泛有效使用。