Production of calcium carbonate via solid-state calcium hydroxide particles and carbon dioxide, and associated systems and methods

A system for producing calcium carbonate, comprising:

• a hydrator comprising a source of water and a source of a first plurality of particles comprising calcium oxide to produce a second plurality of particles comprising solid-state calcium hydroxide particles, individual ones of the calcium hydroxide particles including (i) a specific surface area of at least 20 m2/g and (ii) a free moisture content of from 2% to 20%, wherein the second plurality of particles is part of a slurry comprising no more than 20% liquid weight;
• and wherein the second plurality of particle is part of a slurry at least 80% solid content by weight;
• and a conditioner downstream of the hydrator and positioned to receive the second plurality of particles, wherein the conditioner comprising a source of a gas stream comprising at least 30% by weight carbon dioxide, the conditioner being configured to produce a third plurality of particles comprising solid-state calcium carbonate from the received second plurality of particles and the gas stream.

A system for producing calcium carbonate, comprising:

• a hydrator comprising a source of water and a source of a first plurality of particles comprising calcium oxide to produce a second plurality of particles comprising solid-state calcium hydroxide particles, individual ones of the calcium hydroxide particles including a specific surface area of at least 20 m2/g;
• and a conditioner downstream of the hydrator and positioned to receive the second plurality of particles, wherein the conditioner comprising a source of a gas stream comprising at least 30% by weight carbon dioxide and configured to directly contact the second plurality of particles to produce a third plurality of particles comprising solid-state calcium carbonate wherein the gas stream is provided via a lime kiln.