EP 2106454 B1 20120425 - APPARATUS AND PROCESS FOR THE TREATMENT OF CRUDE LEAD
Title (en)
APPARATUS AND PROCESS FOR THE TREATMENT OF CRUDE LEAD
Title (de)
VORRICHTUNG UND VERFAHREN ZUM BEHANDELN VON WERKBLEI
Title (fr)
DISPOSITIF ET PROCÉDÉ DE TRAITEMENT DE PLOMB D' UVRE
Publication
Application
Priority
- EP 2007062268 W 20071113
- DE 102006059589 A 20061216
Abstract (en)
[origin: WO2008074575A1] In the refining of crude lead, particular constituents such as arsenic, tin and antimony are removed either by selective oxidation by means of air or oxygen or by selective oxidation by means of a salt slag. In the selective oxidation by means of air or oxygen, the oxidant is blown by means of a lance into a bath of liquid lead. A disadvantage of the processes according to the prior art is that a considerable part of the oxidant blown in escapes unused. To improve the efficiency of a process for removing arsenic, tin and antimony from crude lead which operates using a gaseous oxidant, it is proposed according to the invention that the oxidant be introduced in the form of small gas bubbles into a bath of liquid crude lead. As a result of the large surface area of the gas bubbles introduced and the increased residence time, in particular when small gas bubbles are produced in the bath, the reaction is significantly accelerated compared to known processes.
IPC 8 full level
C22B 13/06 (2006.01)
CPC (source: EP)
B22D 1/005 (2013.01); C22B 9/05 (2013.01); C22B 13/06 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
DE 102006059589 A1 20080619; AT E555221 T1 20120515; EP 2106454 A1 20091007; EP 2106454 B1 20120425; ES 2386910 T3 20120905; PL 2106454 T3 20120928; SI 2106454 T1 20120831; WO 2008074575 A1 20080626
DOCDB simple family (application)
DE 102006059589 A 20061216; AT 07822541 T 20071113; EP 07822541 A 20071113; EP 2007062268 W 20071113; ES 07822541 T 20071113; PL 07822541 T 20071113; SI 200730967 T 20071113