Method for separating zinc out of a hot gas containing zinc vapo

Details Method for separating zinc out of a hot gas containing zinc vapo Method for separating zinc out of a hot gas containing zinc vapo

1988-09-16

1989-10-24

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Direct contact with molten material

55 72, B01D 4700, B01D 1900

Patent

active

048760749

ABSTRACT:
To separate zinc out of a hot gas containing zinc vapour, a flow of lead is circulated in counterflow to the gas in a condenser. Heat from the lead flow from the condenser is transmitted to a chamber from which lead is transferred to the condenser. The lead flow from the condenser is cooled in known manner to a temperature at which its zinc saturation solubility is lower than its zinc content, thus causing precipitatioin of the zinc. The precipitated zinc is then separated off. The cooled flow of lead, poor in zinc, is transferred to the chamber for heating by the heat transmitted thereto so that the lead flow heated in this way and supplied to the condenser acquires a zinc saturation solubility higher than its zinc content. An apparatus for putting the method into effect comprises a lead-circulation circuit including a condenser, a cooling channel and means for separating zinc out of the lead, and has the lead-circulation circuit upstream of the condenser provided with a lead chamber with means being arranged to transmit heat from the lead flow leaving the condenser to the lead, poor in zinc, flowing through the chamber.

REFERENCES:
patent: 3928550 (1975-12-01), Seitzer
patent: 4548621 (1985-10-01), Eriksson et al.

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