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Help CenterRotary Kiln for Cement Raw Meal Calcination 1500 Tpd
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1. Introduction
The 1500 TPD (Tons Per Day) Rotary Kiln for Cement Raw Meal Calcination is a high-efficiency, mid-to-large-scale industrial pyro-processing system specifically designed for the precise decarbonization and high-temperature calcination of raw cement meal (raw mix). With a dedicated daily capacity of 1500 tons, this kiln system serves as the primary processing core for modern cement manufacturing plants. Its primary function is to subject a meticulously blended and homogenized mix of limestone, clay, silica, and iron ore to controlled, intense thermal treatment—driving off carbon dioxide ($CO_2$), inducing solid-state mineral reactions, and preparing the raw mix for rapid conversion into high-quality cement clinker.
2. Working Principle
The calcination of cement raw meal inside the rotary kiln operates as a continuous, high-temperature thermal cycle based on an optimized counter-current heat design, typically integrated with a suspension preheater system. The process operates through the following sequential stages:
Preheating and Pre-calcination: The finely pulverized cement raw meal is initially fed into a multi-stage cyclone preheater tower. As it descends, it is suspended in the hot exhaust gases rising from the rotary kiln, rapidly heating the material and initiating the dissociation of carbonates (calcination) before it enters the kiln.
Material Feeding: The partially calcined, highly energized raw meal continuously discharges from the bottom cyclone stage into the kiln tail (the elevated, cooler end of the slightly inclined, slowly rotating steel cylinder).
High-Temperature Calcination & Reaction: As the raw meal moves slowly downward toward the lower end (kiln head), it enters the main burning zone. Heated by a high-momentum multi-channel burner to temperatures between $1300^\circ\text{C}$ and $1450^\circ\text{C}$, the material undergoes complete decarbonization and partial sintering. This triggers the critical chemical fusion of calcium oxide ($CaO$) with silica ($SiO_2$), alumina ($Al_2O_3$), and iron oxide ($Fe_2O_3$) to form the essential clinker mineral phases.
Cooling & Product Discharge: The freshly synthesized, nodular clinker drops from the kiln head into a high-efficiency grate or rotary cooler. Rapid air-quenching stabilizes the clinker’s crystal structure, while the heated air is recaptured and ducted back into the system as highly energized secondary combustion air.
3. Advantages
Optimized Mid-Scale Production Economy: The 1500 TPD capacity offers an excellent balance between capital investment and high-volume manufacturing output. It serves as an ideal baseline for regional cement producers or independent plants looking to maximize continuous 24/7 operational efficiency with manageable overheads.
Precise Mineralogical Consistency: The continuous tumbling motion within the rotating kiln shell ensures that the raw meal experiences perfectly uniform thermal distribution. This guarantees complete, uniform calcination, eliminating unreacted free lime ($f\text{-CaO}$) cores and yielding highly consistent, easily grindable cement clinker.
Excellent Multi-Fuel Adaptation: Equipped with an advanced, low-$NO_x$ multi-channel burner system, the kiln can seamlessly process a variety of fuel sources—including pulverized coal, natural gas, heavy fuel oil, or alternative waste-derived fuels (RDF/biomass)—allowing plant operators to easily hedge against volatile energy markets.
Class-Leading Thermal Efficiency: By capturing high-temperature exhaust gas from the kiln tail to power the raw meal preheater tower and reclaiming heat from the cooling stage, the system maintains a highly efficient thermal loop. This layout drastically minimizes fuel consumption per ton of calcined material.
Heavy-Duty Durability and Eco-Friendly Seals: Built for harsh, continuous industrial environments, the kiln features a reinforced high-tensile steel shell and specialized refractory brick linings. Combined with state-of-the-art, flexible fish-scale mechanical seals and a high-efficiency pulse-jet baghouse, the system guarantees a $99.9\%$ particulate capture rate for clean, zero-waste compliance.
Technical parameters
Model |
Speed (r/min) |
Inclination (%) |
Capacity (t/h) |
Gearbox Model |
Ratio |
Motor Model |
Motor Power (kW) |
Motor Speed (r/min) |
Thrust Roller Type |
Support Count |
Weight (t) |
Φ1.9/1.6x36 |
0.53-1.59 |
4 |
2.5-3 |
JZQ750-1 |
48.58 |
JZT-72-4 |
30 |
1200/400 |
Mechanical |
3 |
53 |
Φ2.1/1.8x36 |
0.5-1.51 |
4 |
4 |
UT2-110 |
163.38 |
JZS-81 |
30/10 |
1410/470 |
-- |
3 |
75 |
Φ1.2x25 |
0.5-1.6 |
3 |
-- |
PM650 |
40.17 |
JZTY71-4 |
22 |
1200/120 |
-- |
3 |
34 |
Φ1.6x32 |
0.158-0.258 |
3 |
-- |
PM750 |
48.57 |
JZJY61-4 |
15 |
1200/120 |
-- |
3 |
46.82 |
Φ1.8x45 |
0.66-1.98 |
4 |
3.5 |
UT2-110 |
163.38 |
JZS-81 |
30/10 |
1410/470 |
-- |
3 |
80 |
Φ2.2x50 |
0.125-1.25 |
3.5 |
4 |
ZS145-11 |
157 |
YCT280-4A |
30 |
1320/132 |
-- |
3 |
130.7 |
Φ2.5x50 |
0.516-1.549 |
3.5 |
5.5 |
ZS165-7 |
99.96 |
YCT355-4A |
55 |
1320/440 |
-- |
3 |
167.5 |
Φ3x48 |
0.3309-3.309 |
3.5 |
35 |
ZL130-14 |
32.11 |
ZSN4-250-21B |
90 |
1000/100 |
-- |
3 |
237 |
Φ3.2x50 |
0.398-3.975 |
3.5 |
50 |
ZL130-16 |
40.85 |
ZSN4-280-11B |
190 |
1500/150 |
-- |
3 |
263 |
Φ3.3x52 |
0.391-3.91 |
3.5 |
50 |
ZSY500-28 |
27.707 |
ZSN4-315-082 |
190 |
1000/100 |
-- |
3 |
280.8 |
Φ4x60 |
0.396-3.96 |
3.5 |
104 |
ZSY630-35.5 |
34.601 |
ZSN4-355-092 |
315 |
1000/100 |
Hydraulic |
3 |
487.5 |
Φ4.2x60 |
0.4165-4.165 |
3.5 |
116 |
ZSY710-35.5 |
35.526 |
ZSN4-355-12 |
420 |
1000/100 |
-- |
3 |
576.1 |
Φ4.3x62 |
0.398-3.98 |
3.5 |
125 |
ZSY710-35.5 |
35.714 |
ZSN4-355-12 |
420 |
1000/100 |
-- |
3 |
598.5 |
Φ4.8x74 |
0.35-4 |
4 |
208 |
JH710C-SW305-40 |
42.226 |
ZSN4-400-092 |
630 |
1500/130 |
-- |
3 |
841 |
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