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Stripping of HCN in a packed tower
Author(s) -
Avedesian Michael M.,
Spira Paul,
Kanduth Harald
Publication year - 1983
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450610605
Subject(s) - stripping (fiber) , chemistry , gold cyanidation , zinc , tower , pilot plant , mass transfer coefficient , cyanide , mass transfer , analytical chemistry (journal) , chromatography , inorganic chemistry , materials science , engineering , organic chemistry , civil engineering , composite material
Experiments were carried out to measure the Henry's law constant for HCN in solutions from the cyanidation of zinc concentrate. The measured value for zinc thickener underflow solution was 5.0 atm/mole fraction whereas for synthetic leach solutions and pure cyanide solutions it was 6.1 and 6.4, respectively. Pilot plant stripping tests were carried out using a 0.3 m diameter column operated under full‐scale hydrodynamic conditions to measure the mass transfer coefficient and also to study the potential scaling problem due to the precipitation of gypsum and CuCNS. These data were used to design the full‐scale plant in a silver recovery flowsheet.