Iron-Nickel Aqueous Solution Chemical Pump

Iron-Nickel Aqueous Solution Chemical Pump

For selecting a chemical pump to transport 10% sulfuric acid (iron-nickel aqueous solution), considering process parameters and material

 requirements, the CQB150-125-400FA magnetically driven centrifugal pump is a suitable technical solution. The specific analysis is as follows:

I. Core Process Parameter Matching

* Flow Rate and Head

* The model's flow rate is 200 m³/h, meeting the requirement of ≥150 m³/h, with a margin to accommodate future flow rate fluctuations.

* The head is 50 m, precisely matching process requirements and avoiding system efficiency degradation due to insufficient head.

* Temperature Adaptability

* The pump is designed to withstand temperatures ≤100℃, perfectly matching the solution temperature of 90-100℃, ensuring long-term 

stable operation.

* Specific Gravity and Power

* The current specific gravity is 1.2, expected to increase to 1.6-1.8.

The pump's permissible specific gravity is ≤1.3. Note the following:

* **Short-term operation:** The speed can be adjusted using a variable frequency motor (75kW-4P) to compensate for the increased

 power demand due to the increased specific gravity.

* **Long-term operation:** If the specific gravity consistently exceeds 1.3, confirm with the supplier whether the motor power needs 

upgrading (e.g., to 90kW) or the pump body structure needs optimization to enhance pressure resistance.

II. Material Corrosion Resistance Analysis

* **Inner Liner and Flow Components:**

* **Pump Casing Liner:** ETFE (ethylene-tetrafluoroethylene copolymer), excellent resistance to sulfuric acid corrosion, suitable 

for 10% sulfuric acid (iron-nickel aqueous solution) environments.

* **Impeller:** ETFE-coated neodymium iron boron magnet (NdFeB), magnetically driven and leak-free, the ETFE layer isolates 

corrosive media.

* **Shaft and Bushing:** Silicon carbide (SiC), high hardness and wear resistance, suitable for solutions containing trace solid

 particles (e.g., iron-nickel precipitates).

* **Sealing Shell:** ETFE + aramid fiber reinforcement, balancing corrosion resistance and mechanical strength.

O-rings: FEP (Fluoroethylene-propylene copolymer) + FKM (Fluororubber), double sealing ensures no leakage.

Shell Material: FC200 (cast iron) lined with ETFE, high structural strength and controllable cost, suitable for non-corrosive external

 environments.

III. Structural Advantages and Operational Reliability: Magnetic drive design; Seal-free structure completely eliminates leakage risk, 

especially suitable for conveying toxic or valuable media (such as nickel-containing solutions).

Isolation sleeve uses ETFE, with high pressure resistance, capable of withstanding system pressure fluctuations.

Variable Frequency Motor Compatibility: The 75kW-4P variable frequency motor supports flow regulation to adapt to process

 changes (such as reducing speed to maintain power balance when specific gravity increases).

Power Supply Parameters (AC380V 50Hz 3PH) comply with domestic industrial standards, requiring no additional transformer.

Maintenance Convenience: Modular design; impellers, bushings, and other vulnerable parts can be replaced individually, reducing

 downtime maintenance costs.

Wuxi carbide components have long lifespan, reducing the need for frequent replacements.

IV. Potential Risks and Improvement Suggestions

* **Specific Gravity Exceedance Risk:** If the solution specific gravity consistently exceeds 1.3, the pump's pressure resistance needs 

to be assessed. It is recommended to consult with the supplier to upgrade materials (e.g., all-silicon carbide flow components) or 

increase motor power.

* **Solid Particle Impact:** If the solution contains trace amounts of iron-nickel particles, the particle size must be confirmed 

(generally <0.2mm).

While silicon carbide bushings have strong wear resistance, large particles may accelerate wear. Adding a pre-filter is recommended.

* **Temperature Fluctuation Management:** If the temperature approaches the 100℃ upper limit, ensure the cooling system (e.g., pump body

 heat sink) is effective to prevent demagnetization of the magnetic drive components due to overheating.

V. Selection Conclusion

The CQB150-125-400FA pump meets current requirements in terms of flow rate, head, temperature, and materials. The magnetic drive

 design ensures leak-free operation, and the silicon carbide + ETFE flow component combination can withstand long-term corrosion 

from 10% sulfuric acid (iron-nickel aqueous solution).

Recommended Actions:

Confirm specific solutions with the supplier when the specific gravity increases to 1.6-1.8 (e.g., power upgrade or material optimization).

Clearly specify material testing reports (e.g., ETFE liner thickness, silicon carbide purity) and warranty terms in the contract.

Reserve spare parts (e.g., O-rings, bushings) to shorten maintenance cycles.

For more information, please contact:

Email: sales01@cxflowmeter.com

WhatsApp: 008618049841995