提升钛精矿品级的研究

Study on Upgrading the Quality Grade of Ilmenite Concentrate

利用氧化热处理和酸浸工艺提升钛精矿的质量等级,研究了氧化处理对钛精矿球磨前后晶体结构的影响及酸浸工艺提高钛精矿品级的效果。结果表明,经750-800℃氧化退火,钛精矿中物相转变较充分,生成假金红石（Fe2Ti3O9）、Fe2O3和金红石型Ti O2相,钛精矿球磨后颗粒细化,物相转变从更低的温度开始,同样温度条件下物相的转变也更充分;对球磨后的钛精矿进行800℃退火和105℃酸浸后,Ca O和Mg O的含量分别降低到0.089%和0.888%,除去率为88.7%和51.8%,而Ti O2含量从44.12%提高到53.64%,能够显著提高钛精矿的质量等级。

The effects of oxidation temperature on the crystal structure of ball milling activated and unactivated ilmenite concentrate as well as upgrading the quality grade of ilmenite concentrate through acid leaching were investigated by oxidation treatment and acid leaching. The results indicate that,after oxidation at750 - 800 ℃,the new phases of Fe2Ti3O9,Fe2O3 and rutile Ti O2 appear in the ilmenite concentrate with comparatively sufficient phase transition,and the phase transition starts at a lower temperature and the conversion rate is higher for the milling ilmenite concentrate. After annealing at 800 ℃ and acid leaching at105 ℃ for the milling ilmenite concentrate,the content of Ca O and Mg O separately decreases to 0. 089%and 0. 888% respectively with 88. 7% and 51. 8% of removal rate,and the content of Ti O2 increases from44. 12% to 53. 64%,which shows a significant improvement for the quality grade of ilmenite concentrate.