US 11,952,284 B2 · Systems of producing calcium and magnesium carbonate from the Ca/Mg containing solution leached by a CO2-based hydrometallurgical process

Abstract

The present invention discloses the systems of producing calcium and magnesium carbonate from the Ca/Mg containing solution leached by a CO2-based hydrometallurgical process which includes: a precipitation reactor that the Ca/Mg containing leached solution is continuously added and fully mixed with the alkaline reagent at specific mole ratio into the precipitation reactor and the reactor also comprises a CO2 bubbling module where CO2 is captured and recirculated from the thermal decomposition process as needed; a solid-liquid separation unit that the treated slurry is treated by the solid-liquid separation unit to produce precipitated calcium and magnesium carbonate products where the recirculating water is recycled back into the precipitation reactor; a thermal decomposition unit that the calcium and magnesium carbonate products is calcined by the thermal decomposition unit to produce an alkaline reagent and the alkaline reagent is recycled back into the precipitation reactor for the next batch of reaction.

Claims20

Dependent claims

A system for producing calcium and magnesium carbonate, wherein the calcium and magnesium carbonate are produced from a Ca/Mg containing solution leached by a CO2-based hydrometallurgical process, and the system comprises the following:

a precipitation reactor, wherein the Ca/Mg containing solution is continuously added and fully mixed with an alkaline reagent into the precipitation reactor to form a fully reacted slurry, and the precipitation reactor further comprises a CO2 bubbling module, wherein CO2 is captured and recirculated from a calcination;
a solid-liquid separation unit, wherein the fully reacted slurry is separated by a solid-liquid separation unit to produce calcium and magnesium carbonate products along with recycled water, wherein the recycled water is circulated back for a preparation of the Ca/Mg containing solution for a next cycle;
a thermal decomposition unit, wherein the calcium and magnesium carbonate products are calcined by the thermal decomposition unit to produce the alkaline reagent, wherein the alkaline reagent is recycled back into the precipitation reactor.

Dependencies are inferred from the claim text.

Systems of producing calcium and magnesium carbonate from the Ca/Mg containing solution leached by a CO2-based hydrometallurgical process

Life of this patent

Systems of producing calcium and magnesium carbonate from the Ca/Mg containing solution leached by a CO2-based hydrometallurgical process

Life of this patent

Abstract

Claims20