Evaluation for the Process of Mineralization of CO_2 Using Natural K-feldspar and Phosphogypsum to Produce Sulfate Potassium

Mineralization of CO2 using thermal activated natural K-feldspar with industrial solid waste phosphogypsum( PG) was studied. The single factor experiments were carried out to optimize the activation conditions and mineralization conditions,and the process was evaluated under the optimal conditions. The results showed that under the conditions of ore / CaSO4 mass ratio,0. 5; calcination temperature,1 200 ℃; calcination time,2 h; mineralization temperature,100 ℃ and initial pressure of CO2,4 MPa,K extraction ratio reached 87%,and CO2 mineralization ratio reached 7. 7%. The new process is economically feasible.