摘要
湖南湘西金矿尾矿-水相互作用非常强烈，导致了尾矿中硫化矿物、硅酸盐矿物的溶解和金属元素的活化迁移。实验和理论分析表明，尾矿-水相互作用过程中存在多相（表面）催化和自催化作用，尾矿中金属硫化物的溶解导致水溶液酸化和SO4等介质浓度增高，并进一步促进尾矿-水相互作用和尾矿中金属元素的释放和迁移；同时，尾矿-水相互作用中释放的金属元素与水溶液中的阴离子形成稳定的络合物，金属的水解可显著加快金属络合物的形成速率，从而又进一步促进了尾矿-水的相互作用。
The interaction between tailings and water in the Xiangxi Gold Mine, Hunan was strong and caused the dissolution of sulfide and silicate minerals and the mobilization of metal elements in tailings. Experiment and theoretical analyses indicate that there are heterogeneous (surface) catalysis and autocatalysis during the processes of tailing/water interaction.The dissolution of metallic sulfides resulted in the acidization of solution and the enlargement of medium concentration such as SO4 et al. which accelerated the tailing/water interaction and the release and migration of metallic elements. The metal elements released during tailing/water interaction can react with the anions in solutions to form stable complexes, and the metallic hydrolysis can greatly develop the formation of metal complexes and accelerate the tailing/water interaction.
出处
《大地构造与成矿学》
EI
CAS
CSCD
1998年第2期156-162,共7页
Geotectonica et Metallogenia
基金
湖南省自然科学基金
关键词
动力学
尾矿-水
相互作用
金矿
Kinetics,tailing/water interaction, Xiangxi Gold Mine
