Mineral Processing Reagents, Iron Oxide-Titania Separation Indo-U.S. Collaborative Project

本项目支持盖恩斯维尔佛罗里达大学材料科学与工程系的美国科学家Brij Moudgil博士和博士后研究员Michael L. Free博士，以及印度浦那塔塔研究开发与设计中心（TRDDC）的N.C. Chaudhuri博士和Pradip博士的合作项目。本研究的目的是了解羟基甲酸酯和脂肪酸试剂在氧化铁-二氧化钛体系中选择性吸附的基本机制。物理和表面化学表征包括x射线、扫描电镜、孔径分布和电动测量。将进行吸附、红外光谱和微浮选试验，以确定实现所需分离的条件。观察到的选择性将根据条件稳定常数、晶体结构特异性和分子轨道的考虑来解释。期望本研究所建立的基础知识能为低品位复杂矿石处理药剂方案的科学设计提供参考。范围：该项目允许两位知名科学家合作，他们的能力互补，并在具有互补设施的机构中工作。穆德吉尔博士是佛罗里达大学新成立的粒子科学与技术工程研究中心的主任。他已经发表了大量的研究论文，包括与普拉迪普合作的一些论文。与乔杜里博士的合作是新的，可能会使两个研究所都受益。该项目符合国际项目部的一些重要目标，特别是在国际合作中引入新的参与者，以及新的美国博士后研究员的国际曝光方面。

Description: This project supports a cooperative project by a US scientist, Dr. Brij Moudgil, and Dr. Michael L. Free, a Post doctoral Research Fellow, at the Department of Materials Science and Engineering, at the University of Florida, Gainesville, and Dr. N.C. Chaudhuri and Dr. Pradip, of the Tata Research Development & Design Centre (TRDDC) in Pune, India. The objective of this research is to understand the basic mechanisms involved in selective adsorption of hydroxamate and fatty acid reagents in the iron oxide-titania systems. Physical and surface chemical characterization would involve x-ray, SEM, pore size distribution and electrokinetic measurements. Adsorption, FT-IR and microflotation tests would be conducted to identify the conditions for achieving the desired separation. Selectivity observed would be explained on the basis of conditional stability constants, crystal structure specificity and molecular orbital considerations. It is expected that the fundamental knowledge base generated in this study would be useful in scientific design of reagent schemes for processing of low grade complex ores. Scope: This project allows cooperation of two well known scientists whose capabilities complement each other and who work in institutions with complementary facilities for the proposed research. Dr. Moudgil is the director of the newly established Engineering Research Center for Particle Science and Technology at the University of Florida. He has had extensive list of research publications, including some with Pradip. The collaboration with Dr. Chaudhri is new and is likely to benefit both institutes. This project meets a number of important objectives of the Division of International Programs, especially in bringing in new participants to the international colaboration, and in the international exposure of a new U.S. Post Doctoral Fellow.