210
X. Wu
Fig. 4 CSC lead smelting process flow chart
is recycled by the waste heat boiler and collected by the electric dust collector, then
combined with the flue gas from the side blow reduction furnace and sent to the
sulfuric acid system for sulfuric acid production. The collected oxidation dust is
returned to the side blowing oxidation furnace material preparation system on site.
➁ Side blowing reduction smelting
Limestone, anthracite, and other auxiliary materials from the raw material warehouse are sent to the reduction furnace by belt conveyor. The molten oxide slag
produced by the oxidation furnace is discharged continuously and flows directly into
the reduction furnace through the chute. The temperature in the furnace is controlled
to 1150–1200 °C. Two feeding ports are set at the top of the reduction furnace and
nozzles are set at the side for blowing oxygen-rich air for smelting. One end of
the reduction furnace is a slag discharge port, and the side part is provided with a
siphon antimony silver coarse lead polymetallic port. The secondary lead produced
by reduction furnace is discharged continuously and flows into the fire refining pot
through chute for preliminary fire refining such as copper removal.
The high-temperature flue gas from the reduction furnace is recycled by the waste
heat boiler, cooled, and collected by the bag type dust collector, and then combined
with the flue gas from the side blowing oxidation furnace and sent to the sulfuric
acid system to produce sulfuric acid. The dust collected by waste heat boiler and bag
type dust collector shall be returned to the top material preparation system of side
blowing reduction furnace. The slag from reduction furnace is continuously blown
into fuming furnace through chute to recover valuable metals such as zinc.
X. Wu
Fig. 4 CSC lead smelting process flow chart
is recycled by the waste heat boiler and collected by the electric dust collector, then
combined with the flue gas from the side blow reduction furnace and sent to the
sulfuric acid system for sulfuric acid production. The collected oxidation dust is
returned to the side blowing oxidation furnace material preparation system on site.
➁ Side blowing reduction smelting
Limestone, anthracite, and other auxiliary materials from the raw material warehouse are sent to the reduction furnace by belt conveyor. The molten oxide slag
produced by the oxidation furnace is discharged continuously and flows directly into
the reduction furnace through the chute. The temperature in the furnace is controlled
to 1150–1200 °C. Two feeding ports are set at the top of the reduction furnace and
nozzles are set at the side for blowing oxygen-rich air for smelting. One end of
the reduction furnace is a slag discharge port, and the side part is provided with a
siphon antimony silver coarse lead polymetallic port. The secondary lead produced
by reduction furnace is discharged continuously and flows into the fire refining pot
through chute for preliminary fire refining such as copper removal.
The high-temperature flue gas from the reduction furnace is recycled by the waste
heat boiler, cooled, and collected by the bag type dust collector, and then combined
with the flue gas from the side blowing oxidation furnace and sent to the sulfuric
acid system to produce sulfuric acid. The dust collected by waste heat boiler and bag
type dust collector shall be returned to the top material preparation system of side
blowing reduction furnace. The slag from reduction furnace is continuously blown
into fuming furnace through chute to recover valuable metals such as zinc.