Spinel-contg., cement bonded body for use as cement clinker

摘要

Spinel-containing, cement bonded body is made from a mixture of cement-containing raw material and a finely dispersed filler material obtained from working up the salt slag from the aluminium industry. The filler material contains in wt.%: 55-70 Al2O3, 7-10 MgO, 6-9 SiO2, 2-5 CaO, 1.5-2.5 F, 1.5-2.5 Fe2O7 and 7-11 heat loss. The MgO is represented minerally as MgO.Al2O3 and the CaO as fluorspar.