Application of CSC Technology in Nonferrous Metallurgy
207
Quartz stone should be added to the converter for slag making, and the slag
poured out after slag making should be packed in slag ladle and returned to the side
blowing furnace for smelting. In the later stage of blowing, in order to control the
refractory nickel oxide produced by overblowing, it is necessary to add crushed coal
for reduction smelting, and the amount of crushed coal is 160 kg/h. High nickel matte
is granulated by high nickel matte in water. The high-temperature flue gas discharged
from the furnace mouth during blowing is sent to the acid-making system together
with the smelting flue gas after the waste heat recovery and dust collection.
(5) Main equipment and technical parameters of CSC oxygen-enriched side-blown
bath smelting process:
• CSC smelting furnace area: 20 m
2
• Specific capacity: 70–80 t/m
2 d
• Smelting temperature: 1300–1400 °C
• Flue temperature: 1400–1500 °C
• Oxygen concentration: 80–85%
• Recovery: Cu 95%, Ni 94.89%.
Lead Smelting with Treatment of Lead and Zinc Slag
(1) Typical case: Project of, Lead Smelting with Lead and Zinc Mixed Furnace
Charge in a Plant in Chenzhou.
(2) Design capacity: Low-grade polymetallic materials to be treated; 100 kt/a.
(3) Main process: Lead containing polymetallic materials → side blowing oxidation furnace → side blowing reduction furnace → side blowing fuming furnace. Lead, zinc, precious metals, and other valuable metals are recovered with
crude lead and secondary oxidation products. The flue gas is discharged after
being treated by waste heat boiler and dust collection. The project was put into
operation in June 2014. See Fig. 3 for process flow.
(4) The brief description of process flow: After the lead containing polymetallic
materials are batched, they are mixed and granulated. The grain size of the
material entering the furnace is about 15 mm, and the water content is controlled
within 10%. The oxygen-enriched side blast furnace is added. The oxygenenriched side blast furnace is injected into the furnace through the air nozzle
at the furnace side. The oxygen and the furnace material react chemically. The
metal lead is collected by the high lead slag. The smoke is collected by the waste
heat boiler and the electric dust collector, and then sent to the batching plant. The
high-temperature flue gas is recycled by waste heat to generate steam, which is
sent to the residual thermal power station for power generation, and the tail gas is
sent to produce acid. The high lead slag enters the oxygen-enriched side blowing
reduction furnace through the chute, and the coarse lead is produced from the
reduction furnace. After the high-temperature flue gas recovers the waste heat
through the waste heat boiler, it is sent to the dust collector for desulfurization,
and the flue gas returns to the smelting batching. The reduction slag enters the
fuming furnace through the chute, the pulverized coal enters the fuming furnace
207
Quartz stone should be added to the converter for slag making, and the slag
poured out after slag making should be packed in slag ladle and returned to the side
blowing furnace for smelting. In the later stage of blowing, in order to control the
refractory nickel oxide produced by overblowing, it is necessary to add crushed coal
for reduction smelting, and the amount of crushed coal is 160 kg/h. High nickel matte
is granulated by high nickel matte in water. The high-temperature flue gas discharged
from the furnace mouth during blowing is sent to the acid-making system together
with the smelting flue gas after the waste heat recovery and dust collection.
(5) Main equipment and technical parameters of CSC oxygen-enriched side-blown
bath smelting process:
• CSC smelting furnace area: 20 m
2
• Specific capacity: 70–80 t/m
2 d
• Smelting temperature: 1300–1400 °C
• Flue temperature: 1400–1500 °C
• Oxygen concentration: 80–85%
• Recovery: Cu 95%, Ni 94.89%.
Lead Smelting with Treatment of Lead and Zinc Slag
(1) Typical case: Project of, Lead Smelting with Lead and Zinc Mixed Furnace
Charge in a Plant in Chenzhou.
(2) Design capacity: Low-grade polymetallic materials to be treated; 100 kt/a.
(3) Main process: Lead containing polymetallic materials → side blowing oxidation furnace → side blowing reduction furnace → side blowing fuming furnace. Lead, zinc, precious metals, and other valuable metals are recovered with
crude lead and secondary oxidation products. The flue gas is discharged after
being treated by waste heat boiler and dust collection. The project was put into
operation in June 2014. See Fig. 3 for process flow.
(4) The brief description of process flow: After the lead containing polymetallic
materials are batched, they are mixed and granulated. The grain size of the
material entering the furnace is about 15 mm, and the water content is controlled
within 10%. The oxygen-enriched side blast furnace is added. The oxygenenriched side blast furnace is injected into the furnace through the air nozzle
at the furnace side. The oxygen and the furnace material react chemically. The
metal lead is collected by the high lead slag. The smoke is collected by the waste
heat boiler and the electric dust collector, and then sent to the batching plant. The
high-temperature flue gas is recycled by waste heat to generate steam, which is
sent to the residual thermal power station for power generation, and the tail gas is
sent to produce acid. The high lead slag enters the oxygen-enriched side blowing
reduction furnace through the chute, and the coarse lead is produced from the
reduction furnace. After the high-temperature flue gas recovers the waste heat
through the waste heat boiler, it is sent to the dust collector for desulfurization,
and the flue gas returns to the smelting batching. The reduction slag enters the
fuming furnace through the chute, the pulverized coal enters the fuming furnace