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NEW PROCESS FOR THE RECYCLING AND IMMOBILIZATION OF METALS IN JAROSITE

Objective



Treatment of jarositic wastes from the zinc industry is a costly procedure,whereas storage in lined basins will eventually result in leakage of heavy metal containing solutions to the groundwater and, thus, pose a threat to the environment. A novel technology(the JARMEST process)treating the jarosite wastes with organic waste streams,was invented by one of the partners to this proposal. The process has been tested in laboratory experiments which produce a solid waste with high metal concentrations and a relatively clear effluent with low metal concentrations. The tests strongly indicate the viability of this waste-to-waste process on an industrial scale. The proposed research concerns the further development into a continuous process,using a vertical high pressure reactor,and should result into a low cost,energy-efficient decontamination technology with the benefits of the recovery of a considerable amount of metals contained in the jarositic waste. The major tasks of the research are grouped as follows:

-test runs on laboratory scale with jarosites of different composition.
-characterization and metallurgical treatment of the solids resulting from the reaction; recycling and/or immobilization of the contained metals.
-decontamination to environmentally acceptable standards of the effluent.
-upgrading of the process to a (semi)-continuous scale in the vertical reactor.
-economic and technical evaluation and basic design of a pilot plant.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

GEOCHEM RESEARCH BV
Address
Bolognalaan,16
3584 CJ Utrecht
Netherlands

Participants (4)

ASTURIANA DE ZINC SA
Spain
Address
Avda De La Playa S/n
33400 San Juan De Nieva
INSTITUT NATIONAL POLYTECHNIQUE DE LORRAINE
France
Address
Rue Du Doyen M. Roubault
54501 Vandoeuvre-les-nancy
UNIV BARCELONA
Spain
Address
Marti I Franques 1
08028 Barcelona
VERTECH TREATMENT SYSTEMS BV
Netherlands
Address
Baarnsedijk 12
3740 AG Baarn