Extraction of ZnO from zinc oxide ore by alkali roasting method

CHEN Bing; GU Huimin; SUN Yi; LI Deguan; ZHAI Yuchun; MA Peihua

doi:10.3969/j.issn.0438-1157.2012.02.046

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Extraction of ZnO from zinc oxide ore by alkali roasting method

更新时间：2025-12-10

- Extraction of ZnO from zinc oxide ore by alkali roasting method
- CIESC Journal Issue 2, Pages: 658-661(2012)
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- DOI：10.3969/j.issn.0438-1157.2012.02.046
  CLC： F813
- Online First：05 February 2012，
  
  Published：05 February 2012
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CHEN Bing, GU Huimin, SUN Yi, et al. Extraction of ZnO from zinc oxide ore by alkali roasting method[J]. CIESC Journal, 2012, (2): 658-661.
DOI：

CHEN Bing, GU Huimin, SUN Yi, et al. Extraction of ZnO from zinc oxide ore by alkali roasting method[J]. CIESC Journal, 2012, (2): 658-661. DOI： 10.3969/j.issn.0438-1157.2012.02.046.

摘要

采用氢氧化钠焙烧法处理氧化锌矿，可使矿物中的ZnO、SiO2和PbO发生反应溶于水得到混合溶液。本文采用正交实验优化了碱焙烧氧化锌矿提取氧化锌的的工艺条件，得到优化的工艺条件为矿碱质量比1:6、焙烧温度400℃、保温时间4h，在优化工艺条件下ZnO的提取率达到82.4%。提锌渣主要成分为超石英和Na2ZnSiO4等，Na2ZnSiO4的存在影响了ZnO的提取率进一步提高。提锌渣形貌不规则，颗粒大小不均。

Abstract

Taking NaOH as raw material

zinc oxide ore was treated by roasting method. ZnO

SiO2 and PbO reacted with alkali first and then went into solution after digestion process. In this paper

orthogonal experiment method was used to optimize technological conditions for extraction of ZnO from zinc oxide ore when roasted with alkali. The optimized conditions are mass ratio of ore and alkali 1:6

holding temperature 400℃

holding time 4h. Under these conditions

the extraction rate of ZnO is 82.4%. The essential components of zinc extracted slag are stishovite

Na2ZnSiO4

whose generation impedes the extraction of ZnO

and so on. The morphology of slag is irregular

the size of particles is nonuniform.

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