Polyaluminum Chloride for Coal Mine

Zibo Dingqi Chemicals Co., Ltd. is one of the most experienced manufacturers and suppliers of polyaluminum chloride for coal mine in China. Welcome to wholesale high quality polyaluminum chloride for coal mine made in China here from our factory. For price consultation, contact us.

Coal Slurry Sedimentation

• PAC acts as a flocculant, promoting the aggregation of coal slurry particles via electro-neutralization, thereby accelerating sedimentation and improving solid-liquid separation efficiency.
• Particularly effective for high-turbidity wastewater containing clay or fine particles.

Circulating Water Purification

• PAC removes suspended solids (SS) and colloidal substances from recycled water, reducing turbidity and preventing pipeline clogging or equipment corrosion.

Filter Press Dehydration Assistance

• PAC enhances filter cake structure and reduces moisture content during coal sludge dewatering, optimizing filtration efficiency.

Wastewater Discharge Compliance

• Ensures treated effluent meets environmental standards (e.g., SS ≤ 50 mg/L) to avoid regulatory violations.

Dosage must be dynamically adjusted based on water quality, typically determined through jar testing:

Concentration Guidelines

• Liquid PAC: Diluted to 5–10% before dosing to avoid high viscosity hindering mixing.
• Solid PAC: Dissolved into a 5–10% solution. Typical dosage ranges (dry basis):
• Low turbidity (<500 NTU): 50–100 mg/L
• High turbidity (500–2000 NTU): 100–200 mg/L
• Extreme turbidity (>2000 NTU): Combine with polyacrylamide (PAM) for synergistic effects.

Dosing Methods

• Multi-stage dosing: Inject PAC at multiple points (e.g., mixing tank, reaction tank) to optimize flocculation.
• pH compatibility: Optimal performance at pH 6–9. Adjust pH for highly acidic/alkaline water. 

Chemical Selection

• Select PAC with appropriate basicity (e.g., 70–90% basicity for most coal slurry systems) based on coal properties (particle size, surface charge, organic content).

Mixing Intensity

• Rapid mixing: High shear (G-value 300–500 s⁻¹) ensures uniform PAC dispersion.
• Slow mixing: Gentle agitation (G-value 20–70 s⁻¹) promotes floc growth without breakage.

Synergistic Use with PAM

• Sequential dosing (PAC first, followed by anionic PAM) enhances settling efficiency and reduces PAC consumption.

Safety and Storage

• Liquid PAC: Protect from freezing and UV exposure.
• Solid PAC: Store in dry conditions.
• Operators must wear PPE (gloves, goggles) to avoid skin/eye contact.

Cost Optimization

• Implement automated dosing systems and real-time turbidity monitoring to balance efficacy and operational costs.

A coal washing plant treating 1000 m³/day of wastewater (influent turbidity: 1500 NTU) achieved effluent turbidity <20 NTU using 80 mg/L PAC (30% solid) and 1 mg/L anionic PAM, with a chemical cost of ~0.3 RMB/ton of water.

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