Method for the recovery of zinc

A method for the recovery of zinc from zinc containing materials using a smelting apparatus for smelting a metalliferous feed material, wherein the smelting apparatus comprises a smelting vessel, a smelt cyclone mounted on the smelting vessel and in connection with the inside of the smelting vessel and an off-gas duct connected to the smelt cyclone, wherein the method comprises the steps of:

• injecting the metalliferous feed material with a carrier gas into the smelt cyclone,
• injecting an oxygen containing gas into the smelt cyclone,
• injecting coal with a carrier gas into the smelting vessel,
• injecting an oxygen containing gas into the smelting vessel,
• optionally injecting fluxes with a carrier gas into the smelting vessel, wherein the zinc containing materials are injected into the smelt cyclone and/or into the smelting vessel, wherein the off-gas is passed through a cooling tower followed by a cold dust cyclone.

A method for the recovery of zinc from zinc containing materials using a smelting apparatus for smelting a metalliferous feed material, wherein the smelting apparatus comprises a smelting vessel, a smelt cyclone mounted on the smelting vessel and in connection with the inside of the smelting vessel and an off-gas duct connected to the smelt cyclone, wherein the method comprises the steps of:

• injecting the metalliferous feed material with a carrier gas into the smelt cyclone,
• injecting an oxygen containing gas into the smelt cyclone,
• injecting coal with a carrier gas into the smelting vessel,
• injecting an oxygen containing gas into the smelting vessel,
• optionally injecting fluxes with a carrier gas into the smelting vessel, wherein the zinc containing materials are injected into the smelt cyclone and/or into the smelting vessel, wherein the off-gas is guided through an inclined off-gas duct part downstream of the smelting vessel and the smelt cyclone, wherein the off-gas is used to drive a steam driven electric generator.