GB/T 34473-2017 in English
VALIDMethods of determination and calculation of heat balance for sintering machine
- Issued on:2017-10-14
- Implemented on:2018-07-01
- File Format:PDF
- Delivery:Via email within 5 business days
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《GB/T 34473-2017烧结机热平衡测试与计算方法》由TC183（全国钢标准化技术委员会）归口，主管部门为中国钢铁工业协会。
Introduction
Analysis of the core content of the standard
Key technical requirements
| Test parameters | Accuracy requirements | Recommended equipment |
|---|---|---|
| Flue gas composition analysis | CO resolution 0.1%, CO₂ resolution 0.1% | NDIR flue gas analyzer (temperature resistance＞700℃) |
| Temperature measurement | ±2℃ or ±2% of reading | K-type armored thermocouple (0-1000℃) |
| Wind speed measurement | Error ±3%, resolution 0.1m/s | Micro anemometer (range 0.3-45m/s) |
Key points for test implementation
- Test cycle: It is necessary to test continuously for 3 days under stable working conditions, no less than 2 times a day, each time lasting 8 hours
- Sampling specification: Gas fuel is sampled once an hour, and solid fuel is intercepted on the batching belt according to GB/T 476 standard
- Data synchronization: Attention should be paid to the time difference compensation between the batching room, sintering trolley and finished product sampling points
Key calculation formulas
Thermal efficiency calculation:
η = [βQ'₃ + Q'₅ + Q'₆ + Q'₇ + Q'₉ - Q₅] / (ΣQ - Q₅) ×100%
Wherein, β is the coefficient of finished ore proportion, Q'₃ is the effective heat of sintered cake, and Q₅ is the sensible heat of mixed material
| Error control index | Material balance ≤5% | Heat balance ≤5% |
|---|
Standard implementation recommendations
- It is recommended to establish an online monitoring system for the heat balance of sintering machines and normalize the standard test methods
- Focus on waste gas waste heat recovery (accounting for about 25-30% of the total expenditure) and optimization of solid fuel utilization
- Regularly calibrate key instruments, especially the calibration cycle of flue gas analyzers and thermocouples shall not exceed 3 months
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