Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Montedison SpA
Original Assignee
Montedison SpA
Montecatini Edison SpA
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Publication date
Application filed by Montedison SpA, Montecatini Edison SpAfiledCriticalMontedison SpA
Priority to ES342427ApriorityCriticalpatent/ES342427A1/en
Publication of ES342427A1publicationCriticalpatent/ES342427A1/en
A procedure for the purification of pyrite and pyrite (pyrite) ash, usable in metallurgy, with elimination of non-ferrous metals, such as copper, zinc, lead, gold, silver, nickel, cadmium, cobalt and manganese, and recovery of said metals, characterized by the following series of operations: A) heating and reduction, total or partial, to magnetite of the ashes, by means of a carbonaceous fuel and of air, at temperatures of 600 to 850ºc; B) chlorination with chlorine and air, in the absence of water and at 650-950º c, of the hot ashes produced in a) in a fluid bed reactor constituted by at least two phases, in which the chlorinating gas circulates countercurrently with respect to the ashes; C) wet elimination of metallic chloride vapors, obtaining aqueous solutions suitable for recovering metals by conventional hydrometallurgical processes. (Machine-translation by Google Translate, not legally binding)
ES342427A1967-07-281967-07-28A procedure for the purification of pirate ash. (Machine-translation by Google Translate, not legally binding)
ExpiredES342427A1
(en)