Selection Comparison of Fly Ash Solidification Mixers
Twin - shaft Forced - type Mixer
Core Advantages
The staggered paddles of the two shafts generate strong shearing force, ensuring uniform mixing of fly ash and solidifying agents (cement, chelating agents).
Corrosion - resistant design: Using corrosion - resistant lining boards and mixing blades.
Typical Parameters
Rotation speed: 25 - 40 rpm (balancing mixing efficiency and dust prevention).
Power: 18.5 - 45 kW (with a processing capacity of 2 - 10 t/h).
Continuous Mixer (for large - scale processing)
Advantages:
Fly ash and agents are continuously fed in, mixed, and then discharged (with a production capacity of up to 20 t/h).
Integrated weighing sensors are used to adjust the ratio in real - time.
Key Points of Process Design
Corrosion Prevention and Sealing
Material Selection
Mixing Blades: Tungsten carbide coating or duplex steel 2205 (resistant to chloride - ion corrosion).
Inner Lining of the Cylinder: 2mm - thick PP board or rubber lining.
Sealing Solutions
Mechanical seal + nitrogen protection (to prevent the leakage of fly ash).
An air curtain for dust removal is set at the shaft end (to block fine particles from entering the bearing).
Optimization of Mixing Efficiency
Segmented Mixing
First Stage: Dry mixing (fly ash + cement/chelating agent) → Second Stage: Wet mixing (spraying water or liquid medicine).
Anti - sticking Design
Polyurethane scrapers are installed on the cylinder wall to automatically clean the adhered materials.
The mixing blades adopt a perforated structure (to reduce material wrapping).
Environmental - compliance Configuration
Exhaust Gas Treatment
Negative - pressure design of the mixing bin → connected to bag - type dust collection + activated - carbon adsorption (to capture heavy - metal particles and dioxins).
Cleaning System
CIP high - pressure spraying (alkaline cleaning solution with pH = 9 to neutralize residual acidic fly ash).
Fly Ash Solidification Process Flow
Pretreatment
Fly ash screening (removing large - sized impurities) → moisture content adjustment (controlled at 15% - 20%).
Mixing Stage
Dry Mixing: Fly ash + cement (the proportion is usually 10% - 20%) → stir for 1 - 2 minutes.
Wet Mixing: Spray chelating agent (such as TMT - 15) solution → continue to stir for 3 - 5 minutes.
Curing and Testing
Molding and curing for 28 days → conduct the TCLP toxicity leaching test.
Configuration Parameters
|
Type |
CHS500 |
CHS750 |
CHS1000 |
CHS1250 |
CHS1500 |
CHS2000 |
CHS2500 |
CHS3000 |
CHS3500 |
CHS4000 |
CHS4500 |
CHS5000 |
CHS6000 |
CHS8000 |
|
Input capacity(L) |
750 |
1125 |
1500 |
1875 |
2250 |
3000 |
3750 |
4500 |
5250 |
6000 |
6750 |
7500 |
9000 |
12000 |
|
Output capacity(L) |
500 |
750 |
1000 |
1250 |
1500 |
2000 |
2500 |
3000 |
3500 |
4000 |
4500 |
5000 |
6000 |
8000 |
|
Mixing power(KW) |
18.5 |
30 |
37 |
22×2 |
30×2 |
37×2 |
45×2 |
55×2 |
55×2 |
75×2 |
75×2 |
90×2 |
55*4 |
90*4 |
|
Hydraulic discharge power(KW) |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
4 |
4 |
5.5 |
|
Mixing arms number(Pc) |
2*4 |
2*4 |
2*5 |
2*5 |
2*6 |
2*6 |
2*7 |
2*8 |
2*9 |
2*9 |
2*10 |
2*11 |
2*12 |
2*12 |
|
Weight(Kg) |
3200 |
3500 |
4700 |
5000 |
5400 |
7800 |
8300 |
8900 |
9500 |
12000 |
14000 |
16000 |
18000 |
21000 |
|
Dimension(mm) |
2490 1780 1700 |
2710 |
2780 |
2780 |
2970 |
3200 |
3440 |
3670 |
3900 |
4080 |
4360 |
4870 |
5650 |
6680 3340 2965 |
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