Methods for coal combustion product (CCP) recovery and related products
AssigneeEco Material Technologies IP Inc.
InventorClinton Wesley Pike, Sr.
Life of this patent
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Abstract
Methods of recovering coal combustion products (CCPs) and/or dry bottom furnace slag (DBFS) from coal combustion byproducts are disclosed. The methods include compiling coal combustion byproducts (e.g., from combustion of lignite coal and/or bituminous coal), grinding the coal combustion byproducts to form ground coal combustion byproducts with a maximum particle size of 40 microns, and separating CCPs from the ground coal combustion byproducts using an electrostatic precipitator. The following CCPs can be separated from the coal combustion byproducts using the presently disclosed methods: fly ash, bottom ash (e.g., containing pyrites), scrubber materials (e.g., calcium sulfate and calcium sulfite), and raw coal.
Claims20
A method of recovering coal combustion products (CCPs) from coal combustion byproducts, the method comprising:
- compiling coal combustion byproducts;
- grinding the coal combustion byproducts to form ground coal combustion byproducts with a maximum particle size of 40 microns;
- and
- separating the CCPs from the ground coal combustion byproducts using an electrostatic precipitator.
A method comprising:
- obtaining dry bottom furnace slag (DBFS) containing pyrites;
- removing moisture from the DBFS to achieve a moisture content of less than 10%;
- and
- grinding the DBFS to form a ground DBFS having a maximum particle size of 40 microns.
Dependencies are inferred from the claim text.