09-01-2020 дата публикации
Номер: US20200010364A1
Принадлежит:
The present invention relates to a modified red mud/a modified bauxite residue and also to processes for the production thereof and to a storage medium comprising a modified red mud, to a heat storage means comprising a storage medium and to numerous uses of a modified red mud as storage medium, in particular in a heat storage means. The modified red mud contains the following components: haematite (FeO), —corundum (AlO), —rutile (TiO) and/or anatase (TiO), —quartz (SiO), —optionally perowskite (CaTiO) and —optionally pseudobrookite ((Fe,Fe)(Ti,Fe)O), nepheline ((Na,K)[AlSiO]) and/or hauynite ((Na,Ca)[AlSiO(SO)]), wherein the modified red mud is substantially free from NaO and/or glass. A novel material is thus provided, and the production thereof for use as a storage medium in a sensitive energy storage system in the low-, medium- or high-temperature range is described. 138-. (canceled)39. A modified red mud comprising:{'sub': 2', '3, 'haematite (FeO);'}{'sub': 2', '3, 'corundum (AlO);'}{'sub': 2', '2, 'rutile (TiO) and/or anatase (TiO);'}{'sub': '2', 'quartz (SiO); and'}{'sub': '2', 'less than 0.5% by weight of NaO and/or glass.'}40. The modified red mud of further comprising at least one of:{'sub': '3', 'perovskite (CaTiO);'}{'sup': 3+', '2+', '3+, 'sub': 2', '5, 'pseudobrookite ((Fe,Fe)(Ti,Fe)O);'}{'sub': '4', 'nepheline ((Na,K)[AlSiO]); and'}{'sub': 4-8', '6', '6', '24', '4, 'hauynite ((Na,Ca)[AlSiO(SO)]).'}41. The modified red mud of further comprising:{'sub': 2', '3, '48 to 55% by weight of haematite (FeO);'}{'sub': 2', '3, '13 to 18% by weight of corundum (AlO);'}{'sub': 2', '2, '8 to 12% by weight of rutile (TiO) and/or anatase (TiO);'}{'sub': '2', '2 to 5% by weight of quartz (SiO); and'}{'sub': '2', 'less than 0.03% by weight of NaO and/or less than 0.1% by weight of glass.'}42. The modified red mud of claim 39 , wherein the modified red mud contains less than 0.5% by weight of aluminium titanate (AlTiO) claim 39 , iron (Fe) claim 39 , mayenite (CaAlO) ...
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