就全球而言 ,大部分硼资源分布在西半球 ,以美国最为集中。我国硼矿探明储量约 5 0 0 0万t(折B2 O3,下同 ) ,量少、品位低、杂质含量高是我国硼矿的三大弱势。我国硼矿中有一半为硼镁石和硼镁铁混合型矿石 ,约 2 5 0 0万t,另外近一半为盐卤型和盐湖固体硼矿石 ,约 2 0 0 0万t , Globally, most of the boron resources are distributed in the western hemisphere, with the United States being the most concentrated. The proven reserves of boron in our country is about 50 million tons (B2O3, the same below), less quantity, low grade and high impurity content are the three major weaknesses of boron mine in our country. Half of China’s boron ore is boehmite and borax mixed ore, about 25 million t, and nearly half of salt brine and salt lake solid boron ore, about 20 million t,