Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Physicochemical Problems of Mineral Processing

2 2011

Powiadomienia systemowe

Sesja wygasła!

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: crude zinc oxide

Sortuj według:

Ogranicz wyniki do:

Recovery of zinc from arduous wastes using solvent extraction technique. Part I. Preliminary laboratory studies

Gotfryd L., Chmielarz A., Szołomicki Z.

Physicochemical Problems of Mineral Processing

2011

Vol. 47

149-158

Solvent extraction technique with 40 volume percent of bis(2-ethylhexyl)phosphoric acid as an extractant was applied for recovery of zinc from technological solutions. Crude zinc oxides from Waelz processing of electric arc furnace dusts or ferrous waste of zinc hydrometallurgy were used for preparation of feed solutions by leaching them with diluted sulfuric acid and by preliminary hydrometallurgical purification. The studies were conducted step by step from elementary laboratory experiment to advanced level of pilot plant tests in a continuously operating installation consisting of a counter-current set of mixer-settler type extractors and necessary equipment. The paper describes the course and results of initial laboratory works undertaken to choose proper extractant and establish conditions for further successful zinc extraction in the pilot plant installation.

Recovery of zinc from arduous wastes using solvent extraction technique. Part II, Pilot plant tests

Gotfryd L., Chmielarz A., Szołomicki Z.

Physicochemical Problems of Mineral Processing

2011

Vol. 47

249-258

Solvent extraction technique using 40 vol. % bis(2-ethylhexyl)phosphoric acid as an extractant was applied for recovery of zinc from technological solutions. Crude zinc oxides from Waelz processing of electric arc furnace dusts or ferrous waste of zinc hydrometallurgy were used for preparation of feed solutions by leaching them with diluted sulfuric acid and by pre-liminary hydrometallurgical purification. The studies were conducted step by step from labor-atory to advanced pilot plant tests in continuously operating installation. Part II describes preparations and results of pilot plant counter-current experiments performed using laboratory extractive system, built from a train of mixer-settler type extractors, set in changeable countercurrent manner, necessary pumps and automation systems, coupling pH measurements with neutralization agent supply. Excellent results in a form of very pure zinc sulfate solutions were obtained. ZnSO4 concentrations are appropriate and the purity of the strip solutions very good. Comparison of natural and accelerated method of zinc extraction is done.