我国有23个重点硼矿加工企业,硼砂年产量在5千吨以上的有9家,生产硼酸的有12家。1985年后又新建和扩建了一些厂家,但至今未形成生产能力。若按建成后新增生产能力加上原有生产能力计算,全国硼砂年产量可达15万吨,硼酸可达2万吨,全国需求12％B_2O_3约75万吨,供需矛盾很大。 国外制硼砂的含硼矿物主要是斜方硼砂和天然硼砂、钠硼解石、硬硼钙石、白硼钙石及纤维硼镁石,还有从含硼卤水中提取硼砂的,所用原料B_2O_3一般都在25％以上,杂质少,易加工,成本低。 我国硼砂生产原料主要是硼镁石矿,品位低,杂质高,加工复杂,碳碱法生产又限制了粉矿的利用。近年的选矿研究扩大了硼 There are 23 key boron mine processing enterprises in our country, 9 are borax with an annual output of over 5,000 tons, and 12 are boric acid producers. After 1985, some new factories were built and expanded, but so far no production capacity has been formed. According to the newly added production capacity after completion of the project and the calculation of the original production capacity, the annual output of borax in China will reach 150,000 tons, boric acid may reach 20,000 tons, and the national demand will be about 750,000 tons of B 2 O 3, with a great contradiction between supply and demand. Boron-bearing foreign boron-bearing minerals are mainly orthorhombic borax and natural borax, sodium borosilicate, hard borocalite, glauberite and fiber boehmite, as well as borax extracted from boron-containing brine, the raw materials used B_2O_3 Generally more than 25%, less impurities, easy processing, low cost. China’s borax production of raw materials is mainly boehmite ore, low grade, high impurity, complex processing, carbon and alkali production and limit the use of powder ore. In recent years beneficiation research has expanded boron