EDXRF based on-line analysis system and its applications in grade analysis of ti and fe ore concentrates

The efficiency of titanium and iron contents analysis is the key to the productivity of titanium and iron ore concentrate. Since energy dispersive X-ray fluorescence technique has advantages of non-destructive, multi-elemental fast analysis etc., an on-line automatic Ti and Fe grade analysis system based on this technique was developed, which consists of ²³⁸Pu source and a proportional counter. A working curve was established to determine the contents of Fe and Ti in given types of ore concentrates from electrical separation process. A total of 801 tests were carried. The results show that the work rate of this system is 95.38%, and the passing rate is 95.15% when absolute error for total-Ti is less than 0.5%. The system is able to complete an analytical process within 5 minutes, basically satisfying the requirement of real-time monitoring. It is a reliable method for on-line quality control in the production process of titanium and iron ore concentrates. (authors)