Pressure-leached Panzhihua Ilmenite Concentrate With Hydrochloric Acid To Preduce Artificial Rutile

Thermodynamic equilibrium of Multcomponent Multphase systems to prepare artificial rutile by pressure-leached process of Panzhihua ilmenite concentrate treated with hydrochloric acid are investigated.Process of ilmenite leached by hydrochloric acid is simulated through Multcomponent Multphase Equilibrium. The base data come from practicality of Panzhihua Steel Corporation Academy. The results of Equilibrium is calculated in Kunming University of Science and Technology. FactSage5.0 extensive database is adopted. Calculation is based on the principle of minimal free energy in this system. Effects of pressure and ratio between solid and liquid on results of equilibrium in this complex system, and dissolving rule of ferric oxide silicic oxide are analysed. We have got several new results: (1) It include transformation rule about some key equilibrium components and density of ferric ion along with variation of pressure. Quality of TiO2 does not vary by comparing equilibrium results at different pressure. (2) Effects of ratio between solid and liquid include: transformation rule about ferric ion are uniform by and large at latm, 4atm, 27atm, (3) Analysis of silicic behavior in the ilmenite include: It is believed that silicic behavior do not transform in this process, and it's form is always SiO2. We can know that the form of silicon is different in different pressure, and it is also different at different ratio between solid and liquid although at same pressure. By calculation of Multcomponent Multphase Equilibrium, we supposed threekind of variation in silicic behavior.Artificial rutile pressure-leached from Panzhihua ilmenite concentrate by hydrochloric acid was studied in Panzhihua Steel Corporation Academy. This experiment mainly studies the technology on pressure-leaching processes of rude and weakly oxidized ilmenite to artificial rutile in hydrochloric acid by pressure kettle. The emphases we studied are effects -quality of artificial rutile and pulverulent ratio- that temperature, ratio between solid and liquid on leaching process of rude and weakly oxidized ilmenite. Several improved processes were tried. We have got some results on the leaching process. The effects of production pulverulent ratio and leaching impurity are analyzed. The mechamsm of pulverization is analyzed. It is discussed that why production pulverulent ratio and impurity leaching ratio are both low at the pressure-leaching processes of weakly oxidized ilmenite, comparing with the pressure-leaching processes of rude ilmenite directly leaching. The improved process, which is either lower pulverulent ratio or higher leaching ratio, is suggested.We have got some recognition about rule on control of equilibrium results and pulverulent ratio in leaching process by Multcomponent Multphase Equilibrium simulation research and leaching experiment. The results of experiment is uniform with that of equilibrium at 4atm. The equilibrium at higher pressure (>4atm) and usual pressure were predicted, which offer some valuable information on improved technology and process. It is found that ferric ion is the key factor which control leaching effects -quality of rutile and pulverulent. Results of experiment indicated that the most quality of rutile is 96%, and particles kept original size by and large.This thesis is accomplished in collaboration with frame of Panzhihua Steel Corporation Academy and Kunming University of Science and Technology. It's contents is a part of "industrial research of artificial rutile pressure-leached from Panzhihua concentrate in hydrochloric acid", which belongs to the 10th five-year plan period ministry of science and technology.