For coal-fired power plants utilizing flue gas desulfurization (FGD), limestone must meet strict chemical and physical specifications. Typical requirements include:
– CaCO3 content ≥90%
– MgO content ≤2%
– SiO2 content ≤2%
– Particle size: 80% passing 325 mesh (44μm)
A complete limestone processing line for FGD systems includes:
1. Primary Jaw Crusher
– Model: PE600×900
– Feed size: ≤500mm
– Capacity: 50-160 t/h
2. Secondary Impact Crusher
– Model: PF1214
– Output size: ≤30mm
– Capacity: 70-130 t/h
3. Tertiary VSI Sand Maker
– Model: VSI1140
– Finished product: 0-5mm (adjustable)
– Capacity: 60-140 t/h
Raw limestone → Primary crushing → Secondary crushing → Screening → Tertiary shaping → Powder grinding (for FGD) → Finished product storage.
| Equipment | Model | Power (kW) | Max Feed Size | Output Size | Capacity (t/h) |
|———–|——-|————|————–|————-|—————-|
| Jaw Crusher | PE600×900 | 75 | 500mm | 65-160mm | 50-160 |
| Impact Crusher | PF1214 | 132 | 350mm | ≤30mm | 70-130 |
| VSI Crusher | VSI1140 | 250 | 50mm | 0-5mm | 60-140 |
Q1: Why is limestone purity critical for FGD?
A: High CaCO3 content ensures efficient SO2 removal. Impurities like SiO2 may cause scaling in scrubbers.
Q2: What’s the advantage of VSI crushers for limestone?
A: VSI crushers produce cubical particles with low powder content, ideal for FGD reagent preparation.
A 2×600MW power plant in Vietnam adopted our limestone processing line, achieving:
