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研究了以氯氧化铋精矿为原料，制取次硝酸铋的工艺条件．ＢｉＯＣｌ精矿经水解、净化、硝酸溶解、二次水解，可得到符合医用要求的次硝酸铋，新工艺使产品的成本大幅度下降，并使铋资源得到合理的利用．
The technological conditions of preparing bismuth subnitrate from bismuth oxychloride concentrate were studied. The BiOCl concentrate can be hydrolyzed, purified, dissolved in nitric acid and hydrolyzed twice to obtain the bismuth subnitrate meeting the medical requirements. The cost of the product is greatly reduced and the bismuth resource is utilized reasonably.