Vacuum Distillation-Treated Spent Potlining as an Alternative Fuel for Metallurgical Furnaces

被引：24

作者：

Li, Nan ^{[1
]}

Jiang, Yan ^{[1
]}

Lv, Xiang ^{[2
]}

Gao, Lei ^{[3
]}

Chattopadhyay, Kinnor ^{[4
]}

机构：

[1] Hong He Univ, Coll Sci, Mengzi 661199, Peoples R China

[2] Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610065, Sichuan, Peoples R China

[3] Kunming Univ Sci & Technol, Fac Mat Sci & Engn, Room 508,Met & Min Bldg, Kunming 650093, Yunnan, Peoples R China

[4] Univ Toronto, Cross Appointed Mech & Ind Engn, Dept Mat Sci & Engn, Fac Appl Sci & Engn,Proc Met Res Labs, Toronto, ON M5S 3E4, Canada

来源：

JOM | 2019年 / 71卷 / 09期

关键词：

POT-LINER; WASTE; VAPOR; SPL;

D O I：

10.1007/s11837-019-03443-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Spent potlining (SPL) is a well-known hazardous waste from primary aluminum production, and recycling it as an alternative fuel for metallurgical furnaces is a promising application. However, because of the presence of volatile fluorides and fluoride compounds, there are significant environmental concerns and practical/engineering issues. An environmentally friendly technique involving pretreatment of SPL first cut at 700 degrees C by vacuum distillation (VDM) is proposed herein. Using this process route, volatile and leachable fluorides (NaF, LiF, and Na3AlF6) in SPL first cut samples were successfully recycled. The distillation process was found to be beneficial for improving the fixed carbon content of the samples, and the combustion characteristics of the VDM residue were superior to those of raw untreated SPL. Such VDM residue could potentially be used in metallurgical furnaces and burners, with promising applications such as partial or full replacement of coal in pulverized coal injection (PCI) systems.

引用

页码：2978 / 2985

页数：8

共 27 条

[1] Mass spectrometric determination of partial pressures of ions in the saturated vapor over the NaF-Na3AlF6 system [J].