System and method for treating copper slag through combination of rotary hearth furnace and fuel gas melting separation furnace
A gas-fired melting furnace and rotary hearth furnace technology, applied in the field of smelting, can solve the problems of high operating cost, high environmental protection cost, unusable tailings, etc., and achieve the effect of reducing energy consumption and good reduction effect
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Embodiment 1
[0065] Finely grind 100 parts of copper slag, 20 parts of reduced coal (mass content of C: 82.06%), 8 parts of additive (limestone) until particle size ≤ 200 mesh accounts for 86.35% by mass, and mix with 6 parts of binder Pellets enter from the feed port of the rotary hearth furnace, the reduction temperature of the rotary hearth furnace is 1280°C, the pre-reduction layer rotates for 30 minutes, and the reduction layer rotates for 40 minutes, and the pellets pass through the pre-reduction layer and the reduction layer respectively from the rotary hearth furnace. The material outlet is discharged, and the reduced coal (mass component of C: 82.06%, particle size: 2.5mm) is evenly covered with the reduced layer through the hollow retaining wall, and the flue gas discharged from the rotary hearth furnace is collected to obtain zinc-rich dust. State metallized pellets are mixed with quicklime at a mass ratio of 1:0.05 into a gas-fired melting furnace for melting and refined for 0.6...
Embodiment 2
[0067] Finely grind 100 parts of copper slag, 25 parts of reduced coal (mass content of C: 81.58%), 5 parts of additive (limestone) until particle size ≤ 200 mesh accounts for 88.59% by mass, and mix with 8 parts of binder Pellets enter from the feed port of the rotary hearth furnace, the reduction temperature of the rotary hearth furnace is 1200°C, the pre-reduction layer rotates for 20 minutes, and the reduction layer rotates for 60 minutes, and the pellets pass through the pre-reduction layer and the reduction layer respectively from the rotary hearth furnace. The material port is discharged, and the reduced coal (mass component of C: 81.58%, particle size 3mm) is evenly covered with the reduced layer through the hollow retaining wall, and the flue gas discharged from the rotary hearth furnace is collected to obtain zinc-rich dust, and the hot state discharged from the rotary hearth furnace is The metallized pellets are mixed with quicklime at a mass ratio of 1:0.06 into a g...
Embodiment 3
[0069] Finely grind 100 parts of copper slag, 30 parts of semi-coke (mass component of C: 83.58%), 10 parts of additive (limestone) until particle size ≤ 200 mesh accounts for 87.46% by mass, and mix with 9 parts of binder Pellets enter from the feed port of the rotary hearth furnace, the reduction temperature of the rotary hearth furnace is 1350°C, the pre-reduction layer rotates for 50 minutes, and the reduction layer rotates for 30 minutes, and the pellets pass through the pre-reduction layer and the reduction layer respectively from the rotary hearth furnace. The material port is discharged, the semi-coke (mass component of C: 83.58%, particle size 3mm) is evenly covered with the reduction layer through the hollow retaining wall, the flue gas discharged from the rotary hearth furnace is collected to obtain zinc-rich dust, and the hot state discharged from the rotary hearth furnace The metallized pellets are mixed with quicklime at a mass ratio of 1:0.09 into a gas-fired mel...
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