(一)磷矿中的铀资源 铀可取代氟磷灰石中的钙呈类质同象状态存在,同时,磷酸盐也能吸附铀。因此,磷矿石中的铀与磷矿物紧密共生。磷矿石的铀品位一般在0.005～0.03％的范围内,沉积型磷块岩要高些,个别高至0.05％以上。就目前的技术发展水平而论,上述含铀的磷矿石多数具有综合回收的价值。 磷矿石的铀品位虽比常规铀矿石的品位(多数在0.1～0.2％之间)低得多,但由于它的储量大,其铀量是可观的。据估计,世界上180亿吨磷酸盐储量含铀达147.2万吨,而铀矿石的总铀储量(以小于80美元/公斤铀的可靠储量计)只有185万吨,两者相差不 (I) Uranium, a source of uranium in phosphate rock, can replace calcium in fluorapatite in the state of isomorphism, and phosphate can also adsorb uranium. Therefore, phosphate rock in the uranium and phosphate minerals closely together. Phosphate rock uranium grade is generally in the range of 0.005 to 0.03%, sedimentary phosphate rock to be higher, individually up to 0.05% or more. In terms of the current level of technological development, most of the above-mentioned uranium-bearing phosphate rock has the value of comprehensive recovery. Although the phosphate grade of uranium ore is much lower than that of conventional uranium ore (mostly between 0.1 and 0.2%), its uranium content is considerable due to its large reserves. It is estimated that the world’s 18 billion tons of phosphate reserves contain 1.72 million tons of uranium and the total uranium reserves of uranium ore are only 1.85 million tons with a reserve of less than 80 dollars per kilogram of uranium