背景资料:镁是地壳中含量最丰富的元素之一,其丰度居第8位,约占地壳组成的2.5%,主要以白云石(碳酸镁钙)、菱镁矿存在,此外,海水中含镁约0.13%,可谓取之不尽。随着全球工业化进程的推进和资源大规模开发利用,各种金属资源如铝、铁等正逐渐减少甚至枯竭,需要寻求新的替代 Background information: Magnesium is one of the most abundant elements in the earth’s crust. Its abundance occupies the 8th place, accounting for 2.5% of the earth’s crust. It is mainly composed of dolomite (magnesium calcium carbonate) and magnesite. In addition, About 0.13% magnesium, can be described as inexhaustible. With the progress of global industrialization and the large-scale development and utilization of resources, various metal resources such as aluminum and iron are gradually decreasing or even being depleted, and new alternative needs to be found