Migration and transformation behavior of harmful elements of lightweight ceramsite preparation from yellow phosphorus slag

2018 1st International Conference on Environment Prevention and Pollution Control Technology

生态环境科学

Jiang, Ming^1,2 ; Zhang, Jian-Yu^1,2 ; Wang, Xiao-Rong^1,2 ; Zhan, Fang-Dong^1,2 ; He, Yong-Mei^1,2 ; Liu, Hong-Pan^3 ; Li, Tian-Guo^1,2 ; Li, Bo^1,2 ; Ning, Ping^4

College of Resources and Environment, Yunnan Agricultural University, Kunming

650201, China^1

Yunnan Engineering Laboratory for Agro-environment Pollution Control and Eco-remediation, Kunming

650201, China^2

College of Materials and Chemical Engineering, Chongqing University of Arts and Sciences, Chongqing

402160, China^3

Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming

650500, China^4

关键词: Gaseous pollutants;    Gaseous products;    Harmful elements;    Heating system;    Large amounts;    Solid-phase;    Transformation behavior;    Yellow phosphorus;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/199/4/042033/pdf
DOI  :  10.1088/1755-1315/199/4/042033

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In order to investigate the pollution behavior during the preparation of lightweight ceramsite from yellow phosphorus slag, the migration and transformation of the P-, S-, F-, and As-containing species in the heating system were simulated and calculated by FactSage 7.1 thermochemical software and databases. The results show that the P in the solid of Ca10(PO4)6F2 is transformed to solid Fe3P and a small amount of gaseous (P2O3)2. The S-containing gaseous pollutants (CS2, S2, PS and COS) start to appear, while a large amount of S remains in the solid phase of CaS. A small amount of F is released in the form of SiF4, and all As exists in gaseous products. At temperatures ranging from 100-1100°C, P, S, F, and As elements cannot be transformed into the slag phase.