球磨转化法由氧化铋制取次碳酸铋研究  

Preparation of Bismuth Subcarbonate by Ball-milling Coversion Method Using Bismuth Oxide

作　　者：蒋叶[1] 唐朝波[1] 唐谟堂[1] 杨声海[1] 何静[1] 陈永明[1] 杨建广[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《湿法冶金》2013年第4期262-265,共4页Hydrometallurgy of China

摘　　要：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2.5mol/L、液固体积质量比为7∶1、球料质量比为8∶1、反应时间为2h、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。A new process for preparation of bismuth subcarbonate by ball-milling coversion method using bismuth oxide has been proposed. The 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 tool/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.

关 键 词：氧化铋 次碳酸铋 球磨转化 制备 

分 类 号：O614.532[理学—无机化学]