CAJ | 학술논문

　　针对次碳酸铋传统制备工艺存在试剂消耗大、产生大量氨氮废水等问题，提出了一种用氧化铋和碳酸氢铵机械球磨直接制备次碳酸铋新工艺，考察了碳酸氢铵浓度、液固体积质量比、球料质量比、反应时间对氧化铋转化率的影响。结果表明，在碳酸氢铵浓度为2．5 mol/L、液固体积质量比为7∶1、球料质量比为8∶1、反应时间为2 h、室温条件下，氧化铋转化率达93．23％。该工艺流程简短，成本低，转化母液可循环利用，解决了传统工艺试剂消耗大及产生大量氨氮废水等问题。
　　침대차탄산필전통제비공예존재시제소모대、산생대량안담폐수등문제，제출료일충용양화필화탄산경안궤계구마직접제비차탄산필신공예，고찰료탄산경안농도、액고체적질량비、구료질량비、반응시간대양화필전화솔적영향。결과표명，재탄산경안농도위2．5 mol/L、액고체적질량비위7∶1、구료질량비위8∶1、반응시간위2 h、실온조건하，양화필전화솔체93．23％。해공예류정간단，성본저，전화모액가순배이용，해결료전통공예시제소모대급산생대량안담폐수등문제。
A new process for preparation of bismuth subcarbonate by ball-milling coversion method using bismuth oxide has been proposed .T he effects of ammonium bicarbonate concentrate ,liquid/solid ratio ,mass ratio of ball to bismuth oxide and milling time on conversion rate of bismuth oxide were ex-amined .The results showed that the direct conversion rate of bismuth oxide colud reach 93 .23% under the optimum conditions which the ammonium bicarbonate concentration was 2 .5 mol/L ,liquid/solid ratio was 7∶1 ,mass ratio of ball to bismuth oxide was 8∶1 ,and milling 2 hours at room temperature . The process has the advantage of short procedure ,cheap reactant ,low cost ,and mother liquid can be u-tilized circularly .