Elaboration of ceramic materials made from refractory waste for high-temperature thermal energy storage applications
AssigneeSeramic Materials Limited
InventorsMike James TINER, Jean-Francois HOFFMANN
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Abstract
A shaped thermal energy storage ceramic and its method of preparation including milling refractory waste exhibiting a diameter of 1 mm or less to form powder, sieving the powder to retain the powder having a particle size below 250 um, combining with a binder as clay or polymer, and water to form at least one of an extrudable paste and a granulated mixture, forming a green body from at least one of an extrudable paste and a granulated mixture, drying the green body, firing the green body to form the ceramic product at a temperature in the range of 1000 deg C. to 1400 deg C. for a time period in the range of 0.5 hours to 12 hours, and cooling the ceramic product.
Claims14
A method of producing a ceramic product, such as a thermal energy storage ceramic product, comprising:
- collecting and sorting a feed stock containing refractory waste, pretreating of the feed stock from at least of iron/steel recovery, recovery of nonferrous material, washing, decontamination (e.g., sulfur, slags, dross, glass, dusts, coke), sieving, crushing, milling, and thermal treatment;
- receiving as a first component material a first recovered refractory material;
- receiving as a second component material a binder;
- combining the first and second component materials with water to form at least one of an extrudable paste and a granulated mixture;
- forming a green body from the at least one of the extrudable paste after extrusion and the granulated mixture;
- drying the green body;
- firing the green body to form the ceramic product at a temperature in a range of 1100° C. to 1400° C. for a time period in the range of 0.5 hours to 12 hours;
- and
- cooling the ceramic product.
Dependencies are inferred from the claim text.