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Lime Rotary Kiln
Product Specifications: Φ2.5×40m - Φ5.6×76m
Production capacity: 150-1500t/d
Application: Mainly used for magnetization roasting of low-grade iron ore in steel plants within the metallurgical industry; oxidation roasting of chromium and nickel iron ores.
Technical Characteristics of Lime Rotary Kiln
1. The lime rotary kiln features an advanced structure, and the vertical preheater with low pressure loss effectively enhances the preheating effect. After preheating, the limestone entering the kiln can achieve a decomposition rate of 20-25%, and it can directly utilize fine-grained limestone of 10-15mm.
2. The reliable combined laminated seal at both ends of the lime rotary kiln ensures an air leakage coefficient of less than 10%. Composite refractory materials are used to reduce radiant heat loss.
3. Lime Rotary Kiln
A packed, zone-ventilated circular or square vertical cooler ensures that the lime exiting the cooler reaches a temperature of 80°C plus ambient temperature, facilitating transport and storage. It also preheats the secondary air entering the kiln to over 700°C, reducing the need for moving parts and special materials.
Design of Lime Rotary Kiln
1. The specifications of the lime rotary kiln should be determined comprehensively based on the requirements for the output of the firing system, combined with factors such as raw and fuel conditions, as well as the configuration of the preheater, precalciner, and cooler.
2. The length-to-diameter ratio (L/D) of preheater kilns and precalciner kilns should be taken as 11-16.
3. The slope of preheater kilns and precalciner kilns should be 3.5%-4%; **Rotation speed: precalciner kilns should be 3.0-3.5 r/min, preheater kilns should be 2.0-2.5 r/min; speed regulation range 1:10.
4. Forced air cooling should be adopted for the cooling of the shell in the firing zone of the lime rotary kiln.
5. The burning zone of a lime rotary kiln should have measures for detecting the temperature of the kiln shell.
6. The main motor of the lime rotary kiln should adopt a variable-speed motor, and an auxiliary drive should be installed, with a backup power supply for the auxiliary drive.
Performance Characteristics of Lime Rotary Kiln
1. The product boasts excellent quality and high output, making it highly suitable for large-scale chemical material production lines and enabling mass production.
2. Stable production operation, adopting full negative pressure production, with smooth airflow and high safety.
3. The structure of the lime rotary kiln is simple, with strong controllability, making it easy to operate and maintain.
4. Low unit product heat consumption: The rotary kiln can fully utilize exhaust gas to preheat materials, significantly reducing fuel consumption and achieving high efficiency and energy savings.
Main Parameters Table of FLH Series Active Lime Rotary Kiln (I)
| Design capacity (t/d) | 150t/d | 200t/d | 250t/d | 300t/d | 350t/d | 400t/d | |
| Product | Active lime | Active lime | Active lime | Active Lime | Active Lime | Active Lime | |
| Preheater | Form | No push head vertical format | No push head vertical format | Low-loss vertical split warehouse | Low-loss vertical split storage | Low lossless sub-warehouse vertical type | Low-loss vertical split warehouse |
| Appearance | Circle | Circle | Round | hexagon | hexagon | Octagon | |
| Number of hydraulic push rods | 4 | 4 | 6 | 6 | 8 | ||
| Size (m) | 7.6*4.1 | ||||||
| Total Weight (t) | 86 | 121.018 | |||||
| Rotary kiln | Specifications | Φ2.5×40m | Φ2.8×42m | Φ3×46m | Φ3.2×50m | Φ3.3×54m | Φ3.6×56m |
| Slope | 3.50% | 3.50% | 3.50% | 3.50% | 3.50% | 3.50% | |
| Speed (r/min) | 0.3-1.5 | 0.3-1.8 | 0.3-1.8 | 0.3-1.8 | 0.3-1.8 | 0.3-1.8 | |
| Weight (t) | 145 | 271 | |||||
| Cooler | Form | Partition Vertical Calculation | Partition Vertical Calculation | Partition vertical format | Partition vertical format | Partition Vertical Calculation | Partition Vertical Calculation |
| Number of temperature control zones | 3 | 3 | 4 | 4 | 4 | 4 | |
| Number of wind towers | 2+1 | 4+1 | 4+1 | 4+1 | 4+1 | 4+1 | |
| Specifications (m) | 3.1*3.1*4.1 | ||||||
| Weight (t) | 18.6 | ||||||
| Discharge Temperature (℃) | ≤80 | ≤80 | ≤80 | ≤80 | ≤80 | ≤80 | |
| Product Heat Consumption (KJ/Kg) | 5300 | 5300 | 5000 | 4750 | 4600 | 4500 | |
| Adapt to fuel | Coke oven gas, mixed gas, natural gas, pulverized coal, low-calorific value gas | ||||||
Main Parameters Table of FLH Series Active Lime Rotary Kiln (II)
| Design capacity (t/d) | 500t/d | 600t/d | 800t/d | 1000t/d | 1200t/d | 1500t/d | |
| Product | Active Lime | Active Lime | Active Lime | Active Lime | Active Lime | Active lime | |
| Preheater | Form | Low-loss vertical split warehouse | Low-loss vertical split warehouse | Low-loss vertical split warehouse | Low-loss vertical split warehouse | Low-loss vertical warehouse partitioning | Low lossless sub-warehouse vertical type |
| Number of preheating chambers | 8 | 12 | 12 | 18 | 20 | 22 | |
| Number of hydraulic push rods | 8 | 12 | 12 | 18 | 20 | 22 | |
| Size (M) | Φ10.4*12.7 | Φ11.54×4.15 | |||||
| Weight (T) | 221.91 | ||||||
| Rotary kiln | Specifications | Φ3.8×56m | Φ4×60m | Φ4.3×64m | Φ4.8×68m | Φ5.2×64m | Φ5.6×76m |
| Slope | 3.50% | 3.50% | 3.50% | 3.50% | 3.50% | 3.50% | |
| Speed (r/min) | 0.3-1.8 | 0.3-1.8 | 0.3-1.8 | 0.19-1.98 | 0.3-1.8 | 0.3-1.8 | |
| Weight (t) | 480 | 685 | |||||
| Cooler | Form | Partition Vertical Calculation | Partition Vertical Calculation | Partition vertical format | Partition Vertical Calculation | Partition Vertical Calculation | Partition Vertical Calculation |
| Number of temperature control zones | 3 | 3 | 4 | 4 | 4 | 4 | |
| Number of wind towers | 2+1 | 4+1 | 4+1 | 4+1 | 4+1 | 4+1 | |
| Specifications (m) | 3.6×3.6 | 4.1×4.1*8 | 4.7×4.7*8.9 | 5.2×5.2 | 5.4×5.4 | 5.8×5.8 | |
| Discharge Temperature (℃) | ≤80 | ≤80 | ≤80 | ≤80 | ≤80 | ≤80 | |
| Product Heat Consumption (KJ/Kg) | 5100 | 5100 | 4800 | 4750 | 4600 | 4500 | |
| Adapt to fuel | Coke oven gas, mixed gas, natural gas, pulverized coal, low-calorific value gas | ||||||
