镁、镁资源与镁质材料概述

中国盐湖卤水镁资源的开发形势十分严峻。首先是量大,仅青海盐湖集团提钾副产的镁卤量就超过中国海盐副产镁卤总量的3倍;其二是缺少适合开发的大宗镁产品,受中国镁碳酸盐矿物开发的冲击,世界范围内,以海湖卤镁为原料的炼镁企业和氧化镁厂商都逐渐退出行业竞争。镁碳酸盐矿物方面,菱镁矿主要生产镁质耐火材料,中国镁质耐火材料产量和产能居世界首位,且已开始变强并良性发展;白云石主要生产金属镁材料,中国金属镁产量和产能占世界的比例更大,也正努力做强;与另两大类镁质材料形成鲜明对比,镁质化工材料领域的现状是又小又弱,相关发展取决于能否率先将产品做成系列和规模。中国盐湖卤水镁资源过多甚至成为"镁害",但该资源价廉、含杂质少,是镁质化工材料的优质原料,应该在相关领域加大投入。

Summary of Magnesium, Magnesium Resources and Magnesium Materials

The development situation of magnesium resourees in salt lake brine in China is very serious.The first problem is the large amount,the magnesium amount in saline brine as the by-product of potassium extraction by Qinghai Salt Lake Group is three times larger than the total amount as the by-product of seasalt production in whole China;the second is the lack of bulk magnesium products,the smelting magnesium enterprises and magnesia manufacturers with the magnesium from sea-salt production as the raw material retreated gradually from the trade competition in the whole world under the impact of the exploitation of magnesium carbonate minerals in China.As to the magnesium carbonate minerals,magnesites are mainly used for magnesia refractory materials whose output and the productivity in China is premier in the world.Furthermore,the industry of the magnesia refractory materials is beginning to get strong with benign development.Dolomites are mainly used for metal magnesium materials,the proportions of whose output and the productivity in China are much larger in the world,and it is trying to be stronger.The situation of magnesium chemical materials is small and weak clearly compared with the other two magnesium materials,and its relative development is dependent on the fact whether the products can be produced into series and scales primarily.The magnesium resource in salt lakes of China is excessive and even becomes "magnesium disaster".But this resource can be used as the high quality raw material for producing magnesium chemical materials for its cheap price and low-impurity content.So,an increase of investment in relative fields should be given.