Cementitious reagents, methods of manufacturing and uses thereof
AssigneeTerra Co2 Technology Holdings, Inc.
InventorDonald John Lake
Life of this patent
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Abstract
Described are cementitious reagent materials produced from globally abundant inorganic feedstocks. Also described are methods for the manufacture of such cementitious reagent materials and forming the reagent materials as microspheroidal glassy particles. Also described are apparatuses, systems and methods for the thermochemical production of glassy cementitious reagents with spheroidal morphology. The apparatuses, systems and methods make use of an in-flight melting/quenching technology such that solid particles are flown in suspension, melted in suspension, and then quenched in suspension. The cementitious reagents can be used in concrete to substantially reduce the CO2 emission associated with cement production.
Claims20
A method comprising:
- introducing a particulate feedstock into a chamber;
- heating the feedstock within the chamber to form molten particles;
- and
- cooling the molten particles to form microspheroidal glassy particles having a mean roundness (R)>0.7, and a molar composition containing Si and Al and optionally one or more of Fe, Ca, Mg, Na, and K, wherein:
- about
-
-
- 0
- .
- 3
- <
- Si
- Si
- +
- Al
- +
- Fe
- +
- Ca
- +
- Mg
- +
- Na
- +
- K
- <
- about
-
-
- 0.6
- ;
- and
- about
-
-
-
- 0.2
- <
- Al
- Si
- +
- Al
- +
- Fe
- +
- Ca
- +
- Mg
- +
- Na
- +
- K
- <
- about
-
-
- 0.35
- ;
- wherein the particulate feedstock is suspended within the chamber in a flame comprising an oxidant gas and a combustible fuel.
A method comprising:
- entraining solid particles of an aluminosilicate feedstock in a gas stream comprising an oxidant gas;
- adding a combustible fuel to the entrained particles to form a mixture;
- flowing the mixture through a burner and forming a flame by combusting the combustible fuel;
- heating the aluminosilicate feedstock particles to a temperature sufficient to melt the solid particles and form molten particles;
- and
- cooling the molten particles to form microspheroidal glassy particles having a mean roundness (R)>0.7, and a molar composition containing Si and Al and optionally one or more of Fe, Ca, Mg, Na, and K, wherein:
- about
-
-
- 0
- .
- 3
- <
- Si
- Si
- +
- Al
- +
- Fe
- +
- Ca
- +
- Mg
- +
- Na
- +
- K
- <
- about
-
-
- 0.6
- ;
- and
- about
-
-
-
- 0.2
- <
- Al
- Si
- +
- Al
- +
- Fe
- +
- Ca
- +
- Mg
- +
- Na
- +
- K
- <
-
- about
-
-
- 0.35
- .
Dependencies are inferred from the claim text.