The Process and Application of Oxygen-Enriched Air Side Blown …
293
Process Flow for Processing of Lead-Bearing Polymetallic
Materials
The process flow diagram for processing of lead-bearing polymetallic materials by
oxygen-enriched side blown oxidation, oxygen-enriched side blown reduction and
fuming with fuming furnace is shown in Fig. 2. After proportioning, the lead-bearing
polymetallic materials are mixed and granulated, with input charge particle size of
around 15 mm, water controlled within 10% before fed to the oxygen-enriched side
blown smelting furnace, where the enriched oxygen is blown via the furnace side
tuyere to the furnace for chemical reaction with the furnace charge. The metal lead is
captured through the high-Pb slag, while the dust goes through the waste heat boiler
and electrostatic precipitator for dust collection to the proportioning operation. The
high-temperature fume generates steam through waste heat recovery, which is sent
to the waste heat power station for power generation, before the off-gas is sent to
acid-making operation. High-lead slag enters via the chute into the oxygen-enriched
side blown reduction furnace; the crude lead is produced from the reduction furnace.
The high-temperature fume goes to the waste heat boiler for heat recovery before
Fig. 2 Process flow diagram of processing of lead-bearing polymetallic materials in oxygenenriched side blown furnace
293
Process Flow for Processing of Lead-Bearing Polymetallic
Materials
The process flow diagram for processing of lead-bearing polymetallic materials by
oxygen-enriched side blown oxidation, oxygen-enriched side blown reduction and
fuming with fuming furnace is shown in Fig. 2. After proportioning, the lead-bearing
polymetallic materials are mixed and granulated, with input charge particle size of
around 15 mm, water controlled within 10% before fed to the oxygen-enriched side
blown smelting furnace, where the enriched oxygen is blown via the furnace side
tuyere to the furnace for chemical reaction with the furnace charge. The metal lead is
captured through the high-Pb slag, while the dust goes through the waste heat boiler
and electrostatic precipitator for dust collection to the proportioning operation. The
high-temperature fume generates steam through waste heat recovery, which is sent
to the waste heat power station for power generation, before the off-gas is sent to
acid-making operation. High-lead slag enters via the chute into the oxygen-enriched
side blown reduction furnace; the crude lead is produced from the reduction furnace.
The high-temperature fume goes to the waste heat boiler for heat recovery before
Fig. 2 Process flow diagram of processing of lead-bearing polymetallic materials in oxygenenriched side blown furnace