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US 8,313,715 B2Granted
Process and plant for producing metal oxide from metal salts
AssigneeOutotec Oyj
InventorsMichael Missalla, Guenter Schneider, Jan Jarzembowski, Erwin Schmidbauer
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Abstract
A process for producing metal oxide from metal salts includes cleaning a metal salt in a filter. After cleaning, the metal salt is dried in a drying apparatus. Steam is formed in the drying apparatus. The metal salt is preheated in at least one preheating stage. The metal salt is calcined to metal oxide in a fluidized-bed reactor. The metal oxide is cooled. The steam formed in the drying apparatus is recirculated into the filter.
Claims18
A process for producing metal oxide from metal salts, the process comprising:
- cleaning a metal salt in a filter;
- drying, after the cleaning, the cleaned metal salt in a drying apparatus, steam being formed in the drying apparatus;
- preheating the dried metal salt in at least one preheating stage;
- calcining the preheated metal salt to metal oxide in a fluidized-bed reactor;
- cooling the metal oxide;
- and
- recirculating the steam formed in the drying apparatus into the filter.
4 more elements
A plant for producing metal oxide from metal salts comprising:
- a drying apparatus configured to dry the metal salt, the drying apparatus including a waste-gas conduit;
- a filter disposed upstream from the drying apparatus and configured to filter the metal salt, the filter being connected to the waste-gas conduit;
- a preheater configured to preheat the metal salt;
- a reactor configured to calcine the metal salt to metal oxide;
- and
- a cooling apparatus configured to cool the metal oxide.
3 more elements
Dependencies are inferred from the claim text.