硫酸铵低温焙烧中低品位氧化锌矿

材料研究学报

2012, Vol. 26

Issue (4): 396-401

研究论文

本期目录 | 过刊浏览

硫酸铵低温焙烧中低品位氧化锌矿

申晓毅, 孙毅, 宋继强, 翟玉春

东北大学材料与冶金学院沈阳 110004

Low Grade Zinc Ore by Low Temperature Roasting Using (NH4)2SO4

SHEN Xiaoyi, SUN Yi, SONG Jiqiang, ZHAI Yuchun

School of materials & Metallurgy, Northeastern University, Shenyang 110004

引用本文:

申晓毅孙毅宋继强翟玉春. 硫酸铵低温焙烧中低品位氧化锌矿[J]. 材料研究学报, 2012, 26(4): 396-401.
, , , . Low Grade Zinc Ore by Low Temperature Roasting Using (NH4)2SO4[J]. Chin J Mater Res, 2012, 26(4): 396-401.

全文: PDF(924 KB)

摘要: 以中低品位氧化锌矿为原料、硫酸铵为反应介质, 通过低温焙烧得到熟料, 研究了焙烧温度对Zn提取率的影响。结果表明, 培烧温度为450℃时锌的提取率最高, 为91.8%。焙烧温度低反应不充分；焙烧温度过高H₂SO₄分解挥发, 降低反应率。将熟料溶出过滤得到硫酸锌溶液, 经净化除杂得到洁净的硫酸锌溶液。以硫酸锌溶液为原料、碳酸铵为沉淀剂, 采用沉淀法制备出碱式碳酸锌前驱体, 将其煅烧制备了微细氧化锌粉体。采用XRD、SEM及化学成分分析等手段对前驱体和氧化锌粉体进行了表征。结果表明, 溶液中OH^-、HCO₃^-与Zn²⁺共同作用得到前驱体, 前驱体受热脱水、分解得到ZnO粉体。碱式碳酸锌前驱体为Zn₄(CO₃)(OH)₆·H₂O, 呈类球形颗粒团聚体, 氧化锌粉体为六方铅锌矿结构, 颗粒呈球形, 分散性良好。

关键词 ：材料合成与加工工艺, 中低品位氧化锌矿, 低温焙烧, 氧化锌粉体

Abstract：The roasting clinker was successfully obtained by low temperature roasting employing low grade zinc ore as row material and ammonium sulfate as reaction medium. The influence of baking temperature in Zn extraction rate was investigated. The results show that the Zn extraction rate reaches to the maximum of 91.8% at 450℃ . The reaction was not sufficient at low temperature, in the contrary, the reaction rate decreased due to the decomposition and volatilization of H2SO4. The ZnSO4 solution was prepared through digestion and filtration processes, and then the pure ZnSO4 solution was gained through purification. The basic zinc carbonate precursor was prepared using homogeneous precipitation employing the ZnSO4 solution as raw materials and the ammonium carbamate as precipitant, and the ultrafine ZnO powder was obtained by calcining the ZnO precursor. XRD, SEM and chemical components analysis were adopted to characterize the as-prepared precursor and the ZnO powder. The results show that the precursor was obtained since the OH− and HCO−3 hydrolyzed from ammonia carbamate reacted with Zn2+ in solution, which was calcinated to prepare the ZnO powder through the dehydration and decomposition. The precursor is basic zinc carbonate of Zn4(CO3)(OH)6·H2O with adhesive spheric particles, and the ZnO powder is of hexagonal wurtzite structure with uniform spheric size and good dispersity.

Key words： synthesizing and processing technics low grade zinc ore low temperature roasting ZnO powder

收稿日期: 2012-04-23

ZTFLH:

TQ127

基金资助:

国家重点基础研究发展计划2007CB613603和中央高校基本科研业务费专项资金N110402012资助项目。

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