无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2013, Vol. 45 ›› Issue (1): 27-.

• 论文 • 上一篇    下一篇

水解沉淀法制备超细碱式碳酸锌的试验研究

张林进,陈利梅,陈川辉,叶旭初   

  1. 南京工业大学材料科学与工程学院,江苏南京 210009
  • 发布日期:2013-01-15

Preparation on ultrafine basic zinc carbonate by hydrolysis-precipitation process

 ZHANG  Lin-Jin, CHEN  Li-Mei, CHEN  Chuan-Hui, YE  Xu-Chu   

  1. School of Materials Science and Engineering, Nanjing University of Technology,Nanjing 210009,China
  • Online:2013-01-15

摘要: 以碳酸氢铵和氨水浸出锌灰,然后经除杂净化得到高纯锌氨溶液,以高纯锌氨溶液为原料,采用加热水解沉淀法合成超细碱式碳酸锌,碱式碳酸锌经煅烧得到超细氧化锌。研究了加热水解沉淀工艺条件对碱式碳酸锌的粒径分布的影响。结果表明,最佳工艺条件为:搅拌速度为300 r/min、蒸氨温度为90 ℃、锌氨溶液中锌质量浓度为75 g/L、负压为-2 kPa。最佳工艺条件下得到的碱式碳酸锌的D50为0.77 μm,颗粒近似球形;煅烧后的氧化锌为六方晶系纤锌矿结构,D50为0.69 μm。

关键词: 水解沉淀法, 碱式碳酸锌, 氧化锌

Abstract: Using ammonium bicarbonate and ammonia for leaching zinc ash,and after purification the high-purity zinc-ammonia solution was prepared.Ultrafine basic zinc carbonate was synthesized by hydrolysis-precipitation process with high-purity zinc-ammonia solution as raw material.Finally,ultrafine ZnO could be obtained through calcination of basic zinc carbonate.Influences of heated hydrolysis-precipitation process conditions on the particle size distribution of basic zinc carbonate were investigated.Results showed that under the optimal conditions of mixing speed 300 r/min,reaction temperature 90 ℃,mass concentration of Zn 75 g/L,and underpressure -2 kPa,the basic zinc carbonate was in the shape of sphere-like with an average size (D50) of 0.77 μm.The particle size(D50) of ZnO after calcination was  0.69 μm with hexagonal wurtzite structure.

Key words: hydrolysis-precipitation, basic zinc carbonate, zinc oxide

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