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Rotary Kiln


Rotary kiln belongs to building material equipment, which can be divided into cement kiln, metallurgy chemical kiln and lime kiln according to different materials.
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Features:
    • Energy-saving and environmental-protection, using wastes as fuel
    • Solid structure, stable operation
    • High-usage of thermal energy

Features

Introduction Of Rotary Kiln

Rotary kiln belongs to building material equipment, which can be divided into cement kiln, metallurgy chemical kiln and lime kiln according to different materials.

Cement kiln is used for the production of cement clinker and there are dry and wet methods to manufacture cement. Metallurgy chemical kiln is used for the magnetic roasting of iron ore and the oxidizing roasting of chrome and nickel in the steel factory; baking high-alumina mine in the refractory material factory; baking chamotte and alumina in the aluminium factory and baking chrome ore and chrome powder in the chemical plant.

Limestone rotary kiln has the simple structure and reliable operation, at the same the production process of the lime rotary kiln can be controlled easily. Limestone rotary kiln is composed of the shell, the supporting device, the supporting device with thrust roller, the driving device, the movable kiln head, the sealing device at kiln tail, the combustion device, etc. Lime rotary kiln is the main equipment for calcining cement clinker and it can be used widely in cement industry, metallurgy industry, chemical industry, etc.

Rotary kilns are commonly used for heat processing of minerals and aggregates such as lime, cement, and iron ore. To achieve consistent quality results, it is important to maintain uniform product temperature at the kiln entry, mid zone, and discharge. In most rotary kilns, the challenge with temperature process control is that the temperature sensor must view through flames or heavy smoke and dust. Consequently, when selecting a sensor, the design, wavelength and alignment are all important considerations.

Application Fields Of Circumgyrate Kiln

Circumgyrate kiln is the equipment which is widely used for dealing with solid material mechanically, physically and chemically in building material, metallurgy, chemical, engineering and environment.

Working Principle Of Rotary Kiln

The cement clinker rotary kiln is a cylindrical vessel, which inclines slightly to the horizontal and rotates slowly around cement clinker rotary kiln axis. The material to be processed is fed into the upper end of the cylinder. As the kiln rotates, materials gradually move down towards the lower end, and may undergo a certain amount of stirring and mixing. Hot gases pass along the kiln, sometimes in the same direction (co-current), but usually in the opposite direction (counter-current). The hot gases may be generated in an external furnace, or may be generated by a flame inside the kiln. Such a flame is projected from a burner-pipe (or "firing pipe") which acts like a large bunsen burner. The fuel for this may be gas, oil or pulverized coal.

Parameter

Technical Parameters Of Rotary Kiln

Model(m) Kiln demensions Output(t/h) Rotation speed (r/min) Motor power (kw) Weight Note
Diameter (m) Length (m) Obliquity(%) (t)
Ø1.4*33 1.4 33 3 0.9-1.3 0.39-3.96 18.5 47.5 ----
Ø1.6*36 1.6 36 4 1.2-1.9 0.26-2.63 22 52 ----
Ø1.8*45 1.8 45 4 1.9-2.4 0.16-1.62 30 78.2 ----
Ø1.9*39 1.9 39 4 1.65-3 0.29-2.93 30 77.59 ----
Ø2.0*40 2 40 3 2.5-4 0.23-2.26 37 119.1 ----
Ø2.2*45 2.2 45 3.5 3.4-5.4 0.21-2.44 45 128.3 ----
Ø2.5*40 2.5 40 3.5 9.0-10.5 0.44-2.44 55 149.61 ----
Ø2.5*50 2.5 50 3 6.25-7.4 0.62-1.86 55 187.37 ----
Ø2.5*54 2.5 54 3.5 6.9-8.5 0.48-1.45 55 196.29 ----
Ø2.7*42 2.7 42 3.5 10.0-11.0 0.10-1.52 55 198.5 ----
Ø2.8*44 2.8 44 3.5 12.5-13.5 0.437-2.18 55 201.58 Suspension preheating kiln
Ø3.0*45 3 45 3.5 12.8-14.5 0.5-2.47 75 210.94 ----
Ø3.0*48 3 48 3.5 25.6-29.3 0.6-3.48 100 237 Outside disassemble kiln
Ø3.0*60 3 60 3.5 12.3-14.1 0.3-2 100 310 ----
Ø3.2*50 3.2 50 4 40.5-42 0.6-3 125 278 Outside disassemble kiln

Technical Parameters Of Active Lime Rotary Kiln

Design capacity(t/d) 150 200 250 300 350 400 500 600 750 800 1000
Product Active lime Calcined dolomite Active lime Calcined dolomite Active lime Calcined dolomite Active lime Calcined dolomite Active lime Calcined dolomite Active lime Calcined dolomite Active lime Calcined dolomite Active lime Calcined dolomite Active lime Calcined dolomite Active lime Calcined dolomite Active lime Calcined dolomite
Preheater round vertical pre-heater or polyonal ventical pre-healer round vertical pre-heater or polyonal ventical pre-healer round vertical pre-heater or polyonal ventical pre-healer round vertical pre-heater or polyonal ventical pre-healer round vertical pre-heater or polyonal ventical pre-healer round vertical pre-heater or polyonal ventical pre-healer round vertical pre-heater or polyonal ventical pre-healer round vertical pre-heater or polyonal ventical pre-healer Vertical Polygonpreheater Vertical Polygonpreheater Vertical Polygonpreheater
Rotary kiln Specification(m) Φ2.5×40 Φ2.8×42 Φ3×46 Φ3.2×50 Φ3.5×54 Φ3.6×56 Φ3.8×58 Φ4×60/Φ4.2×50 Φ4.3×58 Φ4.3×64 Φ4.8×68
Effective volume(m3) 142 190 235 292 390 430 505 575/548 670 738 1005
Burningtemperature 1350/1250 1350/1250 1350/1250 1350/1250 1350 1350 1350 1350 1350 1350 1350
Cooler Vertical SquareCooler Vertical SquareCoole Vertical SquareCoole Vertical SquareCoole Vertical SquareCoole Vertical SquareCoole Vertical SquareCoole Vertical SquareCoole Vertical SquareCoole Vertical SquareCoole Vertical SquareCoole
Fuel Coal gas
Coal powder
Coal gas
Coal powder
Coal gas
Coal powder
Coal gas
Coal powder
Coal gas
Coal powder
Coal gas
Coal powder
Coal gas
Coal powder
Coal gas
Coal powder
Coal gas
Coal powder
Coal gas
Coal powder
Coal gas
Coal powder
Heat rate(KJ/KgC3O) 5300/5000 5300/5000 5300/5000 5300/5000 5225 5225 5100 5100 4810 4810 4810

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