Recent research into the process mineralogy of Jinchuan nickel slag has unveiled significant insights that could reshape the commercial landscape of nickel recovery and processing in the energy sector. Conducted by Liu Xiao-min and his team at the Key Laboratory of the Ministry of Education of China for High-efficient Mining and Safety of Metal Mines at the University of Science and Technology Beijing, this study utilizes advanced analytical techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectrometry (EDS) to analyze the complex mineral composition of nickel slag.
The findings indicate that the slag is primarily composed of hortonolite and glass, with notable occurrences of Cu-Ni sulphide, chalcocite, and magnetite. Liu noted, “The distribution of valuable metals within the slag, particularly nickel and copper, presents new opportunities for recovery processes.” This is particularly relevant as the global demand for nickel continues to surge, driven by its critical role in battery production for electric vehicles and renewable energy technologies.
One of the standout revelations from the research is the irregular distribution of Cu-Ni sulphide within the silicate matrix of the slag, which suggests that traditional recovery methods may need to be re-evaluated. Liu explained, “The structural characteristics we observed indicate that a deep reduction process or hydrometallurgy could significantly enhance the recovery rates of these valuable metals, paving the way for more efficient and sustainable mining practices.”
The implications of this research extend beyond the laboratory. As industries seek to minimize waste and maximize resource efficiency, the ability to recover nickel and copper from slag not only reduces environmental impact but also enhances the economic viability of mining operations. With cobalt found in an isomorphic form within other minerals, the study highlights the necessity for innovative approaches to extract this metal, which is also vital for energy storage applications.
As the energy sector continues to evolve, the insights gained from Liu’s research could drive advancements in metallurgical processes, making them more efficient and environmentally friendly. This could lead to a more sustainable supply chain for critical minerals, ultimately supporting the transition to greener energy solutions.
The detailed findings are published in ‘工程科学学报’, which translates to the Journal of Engineering Science. For more information about Liu Xiao-min’s work, you can visit the University of Science and Technology Beijing.
