Patent ID: 11905179
Assignee: CYPLUS GMBH
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  F | IPC C  F

Claim 1:
2. The method according to claim 1, characterized in that the method comprises the following additional steps:
ii) a step of processing cyanide-containing waste gases arising in step i), wherein
iia) in a first combustion step, the cyanide-containing waste gases arising in step i) are subjected to a sub-stoichiometric combustion, in the sub-stoichiometric combustion the oxygen component in the combustion chamber being less than stoichiometrically required;
iib) in a cooling step, a reaction mixture obtained in step iia) is cooled by introducing an aqueous liquid;
iic) in a second combustion step, a reaction mixture obtained in step iib) is combusted by supplying further oxygen or air under super-stoichiometric conditions, in the super-stoichiometric conditions the oxygen component in the combustion chamber being greater than stoichiometrically required;

v) a step of recirculation, during which the cyanide-containing vapor condensate obtained in step iv) is used as an aqueous liquid in step iib).