Lime kiln apparatus fully recycling co2

A lime kiln apparatus fully recycling CO2, wherein comprising a kiln body (100) and a heat-accumulating furnace set (20), the kiln body (100) defines no burner, the heat-accumulating furnace set (20) is configured to heat CO2 to a set temperature, and to send the heated CO2 to the kiln body (100) to calcinate a preheated mineral material;

• wherein CO2 generated during the calcination mixes with the CO2 heated by the heat-accumulating furnace set (20) to go upwards to preheat a mineral material at an upper part of the kiln body (100), and the mixed CO2 is pumped out of the upper part of the kiln body (100) to enter the heat-accumulating furnace set (20);
• the mixed CO2 is sent to the kiln body (100) after being heated to the set temperature by the heat-accumulating furnace set (20);
• and finished lime obtained by the calcination is discharged from a bottom of the kiln body (100) after being cooled.