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W. Wu et al.
Bottom Blowing Reduction Smelting
In the process of bottom blowing reduction smelting, limestone needs to be added
to adjust the slag type and the pulverized coal is used as the reducing agent. After
quantitative weighing, limestone, pulverized coal, and return product are added into
the bottom blowing reduction smelting furnace by the belt conveyor. Oxygen and
pulverized coal are sprayed into the furnace from the bottom. The reducing slags,
secondary bullion, dust, and offgas are produced by reduction smelting furnace. The
reducing slags flow into the fuming furnace through the slag chute to recover zinc.
The secondary bullion is fed into the plumbum smelter through the tundish and chute
for initial fire refining. The dust is returned to the smelting system for batching via
the airtight scraper conveyor. After recovering waste heat from waste heat boiler and
collecting dust from electric dust collector, the high-temperature offgas is delivered
to the offgas desulfurization system.
Fuming Furnace Blowing Smelting
Pulverized coal is used as fuel and reducing agent in the process of fuming furnace
blowing smelting, which is blown into the fuming furnace by the compressed wind
after weighed. Zinc oxide dust, slag, and offgas are produced. The zinc oxide dust
is collected by the waste heat boiler and dust collector for the recovery of zinc.
After water quenching in the granulation tower, the slag flows into the drum for
water-slag separation and is sent to the slag bin through the belt. After recovering
waste heat from waste heat boiler and collecting dust from electric dust collector,
the high-temperature offgas is delivered to the offgas desulfurization system.
The bullion produced by the SKS furnace and the RSKS furnace flows into the
continuous copper removal furnace through the tundish and chute for initial fire
refining. After removing the copper, the bullion is cast into the anode plate and
sent for electrolytic refining. Large plate is used for electrolysis. The copper matte
produced by the continuous copper removal furnace is delivered to copper plant for
processing.
The steam from waste heat boiler of the SKS furnace, the bottom blowing reduction smelting furnace and the fuming furnace are for waste heat power generation.
The saturated steam is used for waste heat power generation system.
The ionic liquid process and low temperature in slurry phase chelating and
reduction denitrogenation process are applied for offgas desulfurization.
Bullion Refining
Continuous Removal of Copper in Bullion
The bullion from RSKS furnace is discharged through siphon and added to the
continuous refined copper furnace in a molten state for copper removal. And then the
W. Wu et al.
Bottom Blowing Reduction Smelting
In the process of bottom blowing reduction smelting, limestone needs to be added
to adjust the slag type and the pulverized coal is used as the reducing agent. After
quantitative weighing, limestone, pulverized coal, and return product are added into
the bottom blowing reduction smelting furnace by the belt conveyor. Oxygen and
pulverized coal are sprayed into the furnace from the bottom. The reducing slags,
secondary bullion, dust, and offgas are produced by reduction smelting furnace. The
reducing slags flow into the fuming furnace through the slag chute to recover zinc.
The secondary bullion is fed into the plumbum smelter through the tundish and chute
for initial fire refining. The dust is returned to the smelting system for batching via
the airtight scraper conveyor. After recovering waste heat from waste heat boiler and
collecting dust from electric dust collector, the high-temperature offgas is delivered
to the offgas desulfurization system.
Fuming Furnace Blowing Smelting
Pulverized coal is used as fuel and reducing agent in the process of fuming furnace
blowing smelting, which is blown into the fuming furnace by the compressed wind
after weighed. Zinc oxide dust, slag, and offgas are produced. The zinc oxide dust
is collected by the waste heat boiler and dust collector for the recovery of zinc.
After water quenching in the granulation tower, the slag flows into the drum for
water-slag separation and is sent to the slag bin through the belt. After recovering
waste heat from waste heat boiler and collecting dust from electric dust collector,
the high-temperature offgas is delivered to the offgas desulfurization system.
The bullion produced by the SKS furnace and the RSKS furnace flows into the
continuous copper removal furnace through the tundish and chute for initial fire
refining. After removing the copper, the bullion is cast into the anode plate and
sent for electrolytic refining. Large plate is used for electrolysis. The copper matte
produced by the continuous copper removal furnace is delivered to copper plant for
processing.
The steam from waste heat boiler of the SKS furnace, the bottom blowing reduction smelting furnace and the fuming furnace are for waste heat power generation.
The saturated steam is used for waste heat power generation system.
The ionic liquid process and low temperature in slurry phase chelating and
reduction denitrogenation process are applied for offgas desulfurization.
Bullion Refining
Continuous Removal of Copper in Bullion
The bullion from RSKS furnace is discharged through siphon and added to the
continuous refined copper furnace in a molten state for copper removal. And then the