Process and apparatus for manufacture of calcined compounds for the production of calcined products
AssigneeCalix, Inc.
InventorMark Sceats
Life of this patent
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Abstract
A process for producing a highly calcined and uniformly calcined product from a feedstock. The process comprising the steps of grinding the feedstock to powder, preheating the powder, and calcining the powder in a reactor plant that comprises a number of reactor segments in which a flash calciner is used in each progressive reactor segment to incrementally react the powder by raising the temperature in each segment. The last segment may be a high-temperature reactor that has a controlled residence time and temperature that may allow controlled finishing of the calcination process to achieve a desired degree of calcination and sintering of the product; and cooling of the product.
Claims16
A process for producing a calcined product from a feedstock, the process comprising:
- grinding the feedstock to a powder;
- preheating the powder;
- calcining the powder in a reactor plant that comprises a plurality of reactor segments each comprising a flash calciner to incrementally react the powder in a calcination process by raising the temperature in each segment, wherein the feedstock comprises a carbon-containing compound, and wherein the plurality of reactor segments is indirectly heated such that carbon dioxide liberated in the indirectly heated plurality of reactor segments is not mixed with flue gas, so as to enable carbon capture;
- wherein a final reactor segment is a high-temperature reactor having a controlled residence time and temperature to allow controlled finishing of the calcination process to achieve a selected degree of calcination and sintering of the product;
- and
- cooling the product.
Dependencies are inferred from the claim text.