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Processes and technologies for the recycling of spent fuorescent lamps

Kujawski W., Pospiech B.

Polish Journal of Chemical Technology

2014

Vol. 16, nr 3

80--85

The growing industrial application of rare earth metals led to great interest in the new technologies for the recycling and recovery of REEs from diverse sources. This work reviews the various methods for the recycling of spent fluorescent lamps. The spent fluorescent lamps are potential source of important rare earth elements (REEs) such as: yttrium, terbium, europium, lanthanum and cerium. The characteristics of REEs properties and construction of typical fluorescent lamps is described. The work compares also current technologies which can be utilized for an efficient recovery of REEs from phosphors powders coming from spent fluorescent lamps. The work is especially focused on the hydrometallurgical and pyrometallurgical processes. It was concluded that hydrometallurgical processes are especially useful for the recovery of REEs from spent fluorescent lamps. Moreover, the methods used for recycling of REEs are identical or very similar to those utilized for the raw ores processing.

Zinc and cobalt extraction from refuse after sphalerite mineral leaching

Brozova S., Pustejovska P., Jursova S., Vystavelova S.

Rudy i Metale Nieżelazne

2013

R. 58, nr 3

135-137

The paper deals with a possibility of zinc and cobalt extraction from refuse after sphalerite mineral leaching. It contains theoretic analysis of hydrometallurgical processes. Practical part describes samples and their leaching in 10 % and 20 % sulphuric acid. In the end of the paper it is evaluated under which conditions the highest yield of zinc and cobalt from refuse after sulphide ore leaching is reached.

W artykule przedstawiono możliwości ekstrakcji cynku i kobaltu z odpadów po ługowaniu mineralnego sfalerytu. Przedstawiono teoretyczną analizę procesów hydrometalurgicznych. W części praktycznej opisano próbki i ich ługowanie 10 % i 20 % kwasem siarkowym. W końcowej części artykułu oceniano, w jakich warunkach został osiągnięty najwyższy uzysk cynku i kobaltu po ługowaniu rud siarczkowych.