19 Refractory building and construction materials, not of metal; refractory ceramic compounds, namely, refractory casting compounds, not of metal, refractory concrete, and refractory gunning, repair and ramming compounds, not of metal; refractory ceramic work pieces being refractory shapes, not of metal, including ceramic refractory blocks, not of metal, and refractory ceramic tiles; refractory mouldings, not of metal, namely, ceramic mouldings for use in refractory furnaces, and refractory ceramic flushers; refractory ceramic mixtures; refractory ceramic parts, including composite parts; refractory cement, refractory mortars, not of metal, fire burrs, not of metal; refractory linings, not of metal, for building furnaces; all of the aforesaid goods including goods made of reprocessed materials, in particular of reprocessed used refractory materials; silos, non-metallic; structural parts and accessories for all of the aforesaid goods