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

Li, Nan; Jiang, Yan; Lv, Xiang; Gao, Lei; Chattopadhyay, Kinnor

doi:10.1007/s11837-019-03443-6

Cited by 14 publications

(3 citation statements)

References 13 publications

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“…The carbon content of the distilled SCCs was over 91%, and the distillation rate was over 80%. Li et al (2019a) found that more than 97% of the fluoride in the first cut of SPL (SCC) could be recovered by vacuum distillation. The carbon content increased from 47.61 wt.% to 67.08 wt.% after distillation.…”

Section: Research Progress In the Treatment Of Spent Carbon Cathodesmentioning

confidence: 99%

A comprehensive review of aluminium electrolysis and the waste generated by it

Liu

Zhang

2023

Waste Manag Res

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Aluminium is produced by electrolysis using alumina (Al2O3) as raw material and cryolite (Na3AlF6) as electrolyte. In this Hall–Héroult process, the energy consumption is relatively large, and solid wastes such as spent anodes and spent pot liner, flue gas and waste heat are generated. Therefore, this article discusses from the perspective of high energy consumption and high pollution and summarizes the methods to reduce energy consumption and solve pollution problems. The functions of carbon anode, carbon cathode, refractory material and sidewall in aluminium electrolysis cells are discussed in detail. The process of aluminium electrolysis and the ways to improve the current efficiency of aluminium electrolysis cells and reduce their energy consumption are outlined. The causes and treatment methods of spent anodes, spent cathodes, spent refractories and spent spot liner are reviewed. The research progress of waste heat recovery and aluminium electrolysis flue gas purification are analysed. And the future research directions of aluminium electrolysis flue gas are provided.

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Section: Research Progress In the Treatment Of Spent Carbon Cathodesmentioning

confidence: 99%

A comprehensive review of aluminium electrolysis and the waste generated by it

Liu

Zhang

2023

Waste Manag Res

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“…The fluoride in SPL can be completely removed by hydro-processing, 32 and high temperature >1973 K or high vacuum is required for pyro-processing, which has a high requirement for the equipment. 8, 33,34 SPL is a hazardous solid waste produced by the aluminum smelting industry, and no economic and reasonable treatment and utilization technologies have been widely used in industry. The existence of fluoride limits the recovery and further utilization of SPL.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, considerable quantities of harmful and toxic components are adsorbed in SPL. − The efficient utilization and recycling of SPL has become an urgent problem in the aluminum industry. The fluoride in SPL can be completely removed by hydro-processing, and high temperature >1973 K or high vacuum is required for pyro-processing, which has a high requirement for the equipment. ,, …”

Section: Introductionmentioning

confidence: 99%

Recovery of Copper and Cobalt from Converter Slags via Reduction–Sulfurization Smelting Using Spent Pot Lining as the Reductant

Zhao

Hong

et al. 2021

ACS Sustainable Chem. Eng.

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Large amounts of solid wastes are produced in copper and aluminum smelting processes, which not only cause losses of valuable resources but also threaten the ecology and environment. In this study, a reduction−sulfurization smelting method was used for recovering Cu and Co from converter slags by using spent pot lining (SPL) as the reductant. CaO was added to fix the fluorine from SPL into the cleaned slag. Thermodynamic analysis and experiments were performed to verify the feasibility and determine the optimal conditions of this smelting process. The optimum reductant addition of spent cathode carbon block (SCCB) and spent SiC side block (SSCB) was 8−12 wt %, and the copper and cobalt recovery reached more than 98 and 96%, respectively. The addition of 10 wt % CaO for SCCB improved slag viscosity and promoted the separation between slag and matte/alloy and fixed fluorine in the cleaned slag in the form of insoluble calcium fluoride. The metallized Cu−Co matte was obtained, in which Cu mainly existed in the form of sulfide and Co mainly existed in the form of an iron cobalt alloy.

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Experimental Study on the Collecting Agent for Spent Potlining Flotation Index Optimization

Gao

Chattopadhyay

2020

The Minerals, Metals &Amp; Materials Series

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

Cited by 14 publications

References 13 publications

A comprehensive review of aluminium electrolysis and the waste generated by it

A comprehensive review of aluminium electrolysis and the waste generated by it

Recovery of Copper and Cobalt from Converter Slags via Reduction–Sulfurization Smelting Using Spent Pot Lining as the Reductant

Experimental Study on the Collecting Agent for Spent Potlining Flotation Index Optimization

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