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.
Claims18
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 a final 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.
A device adapted for producing a calcined product from powdered feedstock wherein:
- the device comprises a plurality of reactor segments having first and last reactor segments;
- each reactor segment forms a flash calciner;
- each reactor segment is adapted to be operated at a higher temperature than a previous reactor segment;
- and
- the last reactor segment is adapted to exhibit a predetermined residence time for the processing of feedstock and a predetermined temperature that is adapted to allow for controlled finishing of a calcination process to achieve a selected degree of calcination and sintering of the feedstock.
Dependencies are inferred from the claim text.