Ceramic fibers, in particular ceramic fibers including aluminium oxide, silicum oxide and zircon oxide as well as products manufactured therefrom like ceramic wool for building purposes; refractory construction materials, not of metal, containing fireclay, sillimanite, bauxite, corundum, mullite, zircon mullite, chrome corundum, spinel, magnesite and silicon carbide; refractory castables being construction materials, in particular dense castables and dense castables for gunning purposes, low cement castables, ultra low cement castables, insulating castables, insulating gunning castables, special castables; refractory construction products, in particular unshaped fireclay materials and fireclay mortar; fireclay bricks; construction bricks having a high content of aluminium including alumina, fireclay, bauxite, sillimanite, mullite and corundum; construction bricks including chrome-corundum; construction bricks including zircon oxide; construction bricks including aluminium and magnesia spinel; acid resisting bricks; mortar including ceramic binder; chemically binding mortar; vacuum formed products made of ceramic wool for buildings purposes; ceramic fiber paper, in particular on the basis of aluminium-silica fibers for building purposes; sliding gates made of ceramics for steel pouring ladles and continuous casting distributors for building purposes.;