Environmentally sound hydrometallurgical recovery of chemicals from aluminium industry spent potlining

Grolman, R. J.; Kimmerle, Frank M.; Holywell, George

doi:10.1007/978-94-011-1214-7_75

Cited by 3 publications

(2 citation statements)

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“…These additions translate into increased energy costs induced by the heating of these extra materials to very high temperature. 8 Cyanide concentrations in spent potliners (0.1-0.5%) as well as the conditions of treatment vary from one process to another. The large variations in the raw material complicate process optimization and cost minimization.…”

Section: Introductionmentioning

confidence: 99%

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Update on Spent Potliners Treatments: Kinetics of Cyanides Destruction at High Temperature

Courbariaux

Chaouki

Guy

2004

Ind. Eng. Chem. Res.

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A review of the technologies available for treating the cyanide content of spent potliners is presented. The various strategies of treatment are compared. Processes involving the combustion of spent potliners at temperature close to 800 °C were selected as the most cost-effective approach. It was found that designers of such processes are confronted with a lack of data concerning the kinetics of cyanide destruction of spent potliners and the occurrence of agglomeration. This paper addresses both issues by showing that small amounts of additives are necessary for the smooth operation of combustion processes and by presenting a simple model for predicting the amount of additive needed in well-mixed conditions. In addition, for the first time, the apparent kinetics of the destruction of cyanides in spent potliners at high temperature is presented.

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Section: Introductionmentioning

confidence: 99%

“…Furthermore, most vitrification processes rely on the massive addition of additives to produce glassy material that will retain fluorides in its structure once cooled. These additions translate into increased energy costs induced by the heating of these extra materials to very high temperature …”

Section: Introductionmentioning

confidence: 99%