危险废物焚烧灰渣多元氧化物体系平衡相关系及液相区特性

胡明; 虎训; 杨凌志; 邵哲如; 程易; 徐鹏程

doi:10.3969/j.issn.1674-991X.2018.04.052

危险废物焚烧灰渣多元氧化物体系平衡相关系及液相区特性

doi: 10.3969/j.issn.1674-991X.2018.04.052

胡明^1,2,3,,
虎训^3,,
杨凌志⁴,
邵哲如³,
程易²,
徐鹏程³

^1. 中国光大集团博士后工作站,北京 100033
^2. 清华大学化学工程系,北京 100084
^3. 光大环保技术研究院(南京)有限公司,江苏南京 211102
^4. 中南大学资源加工与生物工程学院,湖南长沙 410083

详细信息

作者简介:
胡明(1986—),男,博士,主要研究热等离子体及其在固体废物处理中的应用

中图分类号: X705
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- 被引次数: 0
出版历程
- 收稿日期: 2018-03-13
- 刊出日期: 2018-07-20

The equilibrium phase relations and liquidus characteristics of multi-component oxide systems of hazardous waste incineration ash and slag

HU Ming^{1,2,3
,},
HU Xun^3
,,
YANG Lingzhi⁴,
SHAO Zheru³,
CHENG Yi²,
XU Pengcheng³

^1. China Everbright Group Post-Doctoral Scientific Research Workstation, Beijing 100033, China
^2. Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
^3. Everbright Envirotech(China) Co.,Ltd., Nanjing 211102, China
^4. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China

摘要

摘要: 危险废物焚烧灰渣的熔融玻璃化处置是实现其减量化、无害化及资源化利用的重要技术。灰渣的主要氧化物组成为CaO、Al₂O₃、SiO₂、Na₂O、FeO_x和MgO,其热力学性质和平衡相关系是灰渣熔融形成玻璃态熔渣不可或缺的基础数据。根据灰渣的主要成分,采用热力学软件FactSage计算了不同温度及氧分压条件下,分别向以CaO-SiO₂-Al₂O₃为主的体系中添加Na₂O、FeO_x、Na₂O+FeO_x和Na₂O+FeO_x+MgO后形成的多元体系的平衡相关系和液相区特性。结果表明:温度及氧分压对上述4个多元体系的平衡相关系和液相区特性影响较大,温度从1 400 ℃升到1 500 ℃时,液相区扩大;对含FeO_x的体系,降低氧分压液相区扩大。此外,不同多元体系的平衡相关系和液相区特性差别较大,熔融处理灰渣时,应根据灰渣中实际氧化物体系的热力学性质选择合理的工艺条件。
- 危险废物 /
- 焚烧灰渣 /
- 熔融 /
- 热力学分析 /
- 液相区 /
- 平衡相关系
Abstract: Vitrification is considered as a promising technology for Hazardous Waste Incineration Ash and Slag(HWIAS), which can realize the reduction, innocent treatment and resource utilization of HWIAS. The main oxide components of HWIAS are CaO, Al₂O₃, SiO₂, Na₂O, FeO_x and MgO, and the thermodynamic properties and equilibrium phase relations of the CaO-SiO₂-Al₂O₃-Na₂O-FeO_x-MgO system are essential data for the slag formation in thermal processing of HWIAS. According to the main components of HWIAS, the equilibrium phase relations and liquid phase characteristics of the multicomponent systems were calculated for different temperature and oxygen partial pressures by using the thermodynamic software FactSage. The multicomponent systems include CaO-SiO₂-Al₂O₃-Na₂O, CaO-SiO₂-Al₂O₃-FeO_x, CaO-SiO₂-Al₂O₃-Na₂O-FeO_x and CaO-SiO₂-Al₂O₃-Na₂O-FeO_x-MgO systems. The results showed that the effects of temperature and oxygen partial pressure on the equilibrium phase relations and liquidus characteristics of the four multicomponent systems mentioned above were remarkable. The liquid zone enlarged with increasing temperature from 1 400 to 1 500 ℃. For the multicomponent systems containing FeO_x, the liquid zone increased with the reduction of oxygen partial pressure. In addition, the equilibrium phase relations and liquidus characteristics of different multicomponent systems differ greatly at the same temperature and oxygen partial pressure, so the reasonable technological conditions should be chosen according to the thermodynamic properties of the actual oxide system in HWIAS.
- hazardous waste /
- incineration ash and slag /
- melting /
- thermodynamic analysis /
- liquidus /
- equilibrium phase relation

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