China has become the world's largest primary magnesium producer and magnesium ingot exporter since the be-ginning of 21st century. However,in recent years,the technological progress of primary magnesium industry has slowed down and there has been a lack of new technologies,making it difficult to meet the country's increasingly tightened energy conser-vation and environmental protection policies,and facing an unprecedented survival crisis. To promote the sustainable devel-opment of China's primary magnesium industry,an increase in research and development funding is urgently needed from the state so as to attract high-level research teams and initiate novel and disruptive technological innovations. A series of key issues in existing primary magnesium production processes have been identified in this article,like low efficiency and high energy consumption of dolomite calcination,the lack of large-scale reduction equipment for the silicothermic process,high costs and energy consumption of reducing agents,low efficiency and poor environment of refining process and inaccurate composition detection of magnesium ingots. Through in-depth analysis of the origin of the above issues,corresponding innovative solutions are put forward,such as the high-efficiency suspension calcination process for dolomite powder,a wall-type large-scale reduction system,pho-tovoltaic solid waste silicon sludge reducing agents,pressure refining technology under a fully inert atmosphere protection,and pure magnesium reference samples with low content,etc. It also highlights high-value scientific problems of these ideas and sketches a new blueprint for an efficient,energy-saving,green and low-carbon silicothermic magnesium smelting process.
维普
万方数据