在低温压力氧化过程中,它们的混合物中矿和矿的溶解行为:动态分析
Kirill Karimov1, Maksim Tretiak1, Denis Rogozhnikov1
1Laboratory of Advanced Technologies in Non-Ferrous and Ferrous Metals Raw Materials Processing, Institute of New Materials and Technologies, Ural Federal University, Yekaterinburg 620002, Russia.
Materials (Basel, Switzerland)
|February 13, 2025
概括
这项研究表明,在压力漂水过程中混合矿和矿会增强矿的氧化. 电化学键形成减少了元素硫的被动化,提高了矿物加工效率.
科学领域:
- 提取性金工业 提取性金工业
- 矿物加工 矿物加工
- 化学工程是化学工程的重要组成部分.
背景情况:
- 压力液对于从硫化物矿物中提取金属至关重要,如化石和化石.
- 了解混合矿物系统中的协同效应和反应机制对于过程优化至关重要.
- 元素硫的形成可以阻碍矿物质的溶解和被动化.
研究的目的:
- 为了研究低温 (100±2°C) 下化和化混合物的压力浸出行为.
- 阐明这些矿物质在混合系统中的氧化机制和动力学.
- 为了确定矿物相互作用对溶解和表面被动化的影响.
主要方法:
- 在100±2°C的温度下,混合化石和化石的试验性压力浸.
- 动力分析以确定速度限制步骤和激活能量.
- 扫描电子显微镜 (SEM) 和能量散射X射线 (EDX) 映射用于表面特征.
主要成果:
- 动力学分析表明,甲酸盐和甲酸盐的氧化具有内部扩散限制.
- SEM和EDX绘制显示了元素硫膜的形成,使矿物表面无能化.
- 化氧化度在混合物中从54.5%增加到80.3%;激活能量增加到59.0kJ/mol.
结论:
- 石墨矿和石墨矿的氧化机制在它们的混合物中发生变化,这可能是由于电化学键的形成.
- 皮里特的添加会通过减少皮里特表面的元素硫形成,对皮里特的氧化产生积极的影响.
- 硫化物之间的相互作用导致了更均的硫分布和增强的氧化.
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