Manufacture of new materials and their use as storage media in sensible heat energy storage systems in the cold, medium and hot regions

摘要

The present invention relates to a modified red sludge or a modified bauxite residue and processes for producing same, and to a storage medium comprising a modified red sludge, a heat store comprising a storage medium and numerous uses of a It modified red sludge as storage medium, more particularly in a heat store system. The modified red sludge here contains the following components: —haematite (Fe2O3), —corundum (Al2O3), —rutile (TiO2) and/or anatase (TiO2), —quartz (SiO2), —optionally perovskite (CaTiO3) and —optionally pseudobrookite ((Fe3+, Fe2+)2(Ti, Fe3+)O5) and/or nepheline ((Na,K)[AlSiO4]). A novel material is thus provided, and production thereof is described for use as storage medium in a sensitive energy storage system in the low-, medium- or high-temperature sector.