锌灰资源化回收及超临界水热合成纳米氧化锌系统工艺

刘璐; 王树众; 刘伟; 张宝权; 刘慧; 刘辉; 赵君安

doi:10.7652/xjtuxb202403018

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锌灰资源化回收及超临界水热合成纳米氧化锌系统工艺

—————————————————————— | 更新时间：2025-07-09

- 锌灰资源化回收及超临界水热合成纳米氧化锌系统工艺
- Zinc Ash Recycling and the System of Supercritical Hydrothermal Synthesis of Nano-Zinc Oxide
- 西安交通大学学报 2024年58卷第3期页码：193-203
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
  
  : 2023-06-05。作者简介: 刘璐(1998—),女,博士生
  王树众(通信作者),男,教授,博士生导师。基金项目: 国家自然科学基金资助项目(52101096,52176162)。
- 基金信息：
  
  : 2023-06-05。作者简介: 刘璐(1998—),女,博士生;王树众(通信作者),男,教授,博士生导师。基金项目: 国家自然科学基金资助项目(52101096,52176162)。
- DOI：10.7652/xjtuxb202403018
  中图分类号： O781;TM912.9
- 网络首发：2024-03-10，
  
  纸质出版：2024
- 稿件说明：
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刘璐, 王树众, 刘伟, 等. 锌灰资源化回收及超临界水热合成纳米氧化锌系统工艺[J]. 西安交通大学学报, 2024,58(3):193-203.

LIU Lu, WANG Shuzhong, LIU Wei, et al. Zinc Ash Recycling and the System of Supercritical Hydrothermal Synthesis of Nano-Zinc Oxide[J]. 2024, 58(3): 193-203.
刘璐, 王树众, 刘伟, 等. 锌灰资源化回收及超临界水热合成纳米氧化锌系统工艺[J]. 西安交通大学学报, 2024,58(3):193-203. DOI： 10.7652/xjtuxb202403018.

LIU Lu, WANG Shuzhong, LIU Wei, et al. Zinc Ash Recycling and the System of Supercritical Hydrothermal Synthesis of Nano-Zinc Oxide[J]. 2024, 58(3): 193-203. DOI： 10.7652/xjtuxb202403018.

摘要

为了对锌灰进行资源化回收及对其经济性进行分析

将湿法回收工艺和超临界水热合成技术相结合

将锌灰生成价值较高的纳米氧化锌产品

采用Aspen Plus软件平台

建立了完整的系统工艺

并分析了系统运行过程中的物料成本及能耗成本。在硫酸浓度为2 mol·L

-1

、固液比为1:8、浸出温度为50 ℃、浸出时间为2 h、搅拌器转速为300 r·min

-1

的条件下

锌灰中锌的浸出率达到了95%以上。除杂过程除去了Fe、Al、Ni、Cu等杂质

除杂后的溶液中锌的质量分数达到了97%。利用锌灰浸出液在400 ℃和25 MPa的超临界条件下

合成了平均粒径为26 nm的纳米氧化锌

晶体结晶度良好

纯度较高。通过与纯物料所合成的纳米氧化锌进行对比

验证了该技术的可行性

显著提升了系统运行的经济性。

Abstract

In this study

a combination of wet recovery process and supercritical hydrothermal synthesis technology is employed to produce high-value nano-zinc oxide products from zinc ash

and an economic analysis of this approach to zinc ash recycling is conducted. A sound system is established using Aspen Plus

and material costs and energy consumption during system operation are analyzed. The leaching rate of zinc in the zinc ash exceeds 95%

under the conditions of sulfuric acid concentration of 2 mol·L

-1

solid-liquid ratio of 1:8

leaching temperature of 50 ℃

leaching time of 2 h

and stirrer speed of 300

r·min

-1

. Fe

Cu and other impurities are eliminated in the impurity removal process

and the zinc content in the solution after impurity removal reaches 97%. The leaching solution of zinc ash is used to synthesize nano-zinc oxide with an average particle size of 26 nm under supercritical conditions of 400 ℃ and 25 MPa. The resulting zinc oxide exhibits excellent crystallinity and high purity. The comparison with nano-zinc oxide synthesized from pure materials validates the feasibility of this technology

which significantly improves the system's economic viability.

关键词

Keywords

references

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