Process and plant for producing metal oxide from metal compounds
AssigneeOutotec Oyj
InventorsMartin Hirsch, Werner Stockhausen, Michael Stroeder
Life of this patent
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Abstract
A plant for producing metal oxide from metal compounds includes a fluidized-bed reactor in which the metal compounds are heated by a combustion of a fuel to produce metal oxide. The fluidized-bed-reactor reactor includes at least one gas supply tube at least partly surrounded by an annular chamber in which a stationary annular fluidized bed is disposed, and a mixing chamber disposed above an orifice region of the gas supply tube. A gas flowing through the gas supply tube entrains solids from the stationary annular fluidized bed when passing through the orifice region.
Claims18
A plant for producing metal oxide from metal compounds, the plant comprising:
- a fluidized-bed reactor in which the metal compounds are heated by a combustion of a fuel to produce metal oxide, wherein the fluidized-bed-reactor reactor includes:
- at least one gas supply tube at least partly surrounded by an annular chamber in which a stationary annular fluidized bed is disposed;
- and
- a mixing chamber disposed above an orifice region of the gas supply tube, wherein a gas flowing through the gas supply tube entrains solids from the stationary annular fluidized bed when passing through the orifice region, and
- a mixing vessel downstream of the fluidized-bed reactor, the mixing vessel being configured to mix a product with partly calcined metal oxide solids so as to obtain a product mixture.
A plant for producing metal oxide from metal compounds, the plant comprising:
- a fluidized-bed reactor in which the metal compounds are heated by a combustion of a fuel to produce metal oxide, wherein the fluidized-bed-reactor reactor includes:
- at least one gas supply tube at least partly surrounded by an annular chamber in which a stationary annular fluidized bed is disposed;
- and
- a mixing chamber disposed above an orifice region of the gas supply tube, wherein a gas flowing through the gas supply tube entrains solids from the stationary annular fluidized bed when passing through the orifice region, and
- a preheating unit disposed upstream of the fluidized-bed reactor configured to heat the solids and including a solids conduit leading to the annular fluidized bed of the fluidized-bed reactor.
A plant for producing metal oxide from metal compounds, the plant comprising:
- a fluidized-bed reactor in which the metal compounds are heated by a combustion of a fuel to produce metal oxide, wherein the fluidized-bed-reactor reactor includes:
- at least one gas supply tube at least partly surrounded by an annular chamber in which a stationary annular fluidized bed is disposed;
- and
- a mixing chamber disposed above an orifice region of the gas supply tube, wherein a gas flowing through the gas supply tube entrains solids from the stationary annular fluidized bed when passing through the orifice region, and
- a cooling unit disposed downstream of the fluidized-bed reactor for at least one of a product and a product mixture, the cooling unit comprising a fluidized-bed cooler with at least one vertical weir such that the at least one of the product and the product mixture forms a fluidized bed at the at least one vertical weir.
Dependencies are inferred from the claim text.