Calcium additive: Particle Size 80% passing 75 μm

Q: How does calcium additive improve PAC coagulation efficiency?

Calcium ions neutralize negative charges on suspended particles, enhancing their aggregation with PAC-formed flocs while providing pH buffering to maintain optimal coagulation conditions.

Q: What is the recommended dosage ratio for calcium additive with PAC?

Typically 1:10 to 1:20 calcium additive:PAC by weight, depending on water hardness and turbidity. Always conduct jar tests for specific applications.

Q: Can this additive be used with other coagulants besides PAC?

Primarily optimized for PAC systems. Compatibility with aluminum sulfate or ferric chloride requires testing as calcium may interfere with their coagulation mechanisms.

Component Specifications

Definition

A specialized calcium-based additive formulated for use with Industrial Grade Polyaluminum Chloride (PAC) coagulants in water treatment systems. This component improves coagulation performance by providing calcium ions that enhance floc formation, increase particle density for better settling, and help maintain optimal pH ranges (typically 6.5-8.5) for PAC effectiveness. It functions as both a coagulant aid and pH stabilizer in industrial water purification processes.

Working Principle

Works through ionic interaction where calcium ions (Ca²⁺) neutralize negative charges on suspended particles, improving their aggregation with PAC-formed flocs. The additive also provides alkalinity to buffer pH changes during coagulation, ensuring PAC remains in its most effective polymeric form. This dual-action mechanism enhances turbidity removal, reduces coagulant dosage requirements, and improves overall treatment efficiency.

Materials

High-purity calcium carbonate (CaCO₃) or calcium hydroxide (Ca(OH)₂) with minimum 95% active content, low heavy metal contamination (<10 ppm), controlled particle size distribution (10-100 μm), and moisture content below 2%.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Reactivity	Complete within 15 minutes
Solubility	≥95% in water
Bulk Density	0.8-1.2 g/cm³
Particle Size	80% passing 75 μm
Calcium Content	≥38% as CaO
PH (5% Solution)	10.5-12.5

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 9001, ISO 14001, DIN 19603, AWWA B202

Parent Products

This component is used in the following industrial products

Industrial Grade Polyaluminum Chloride Coagulant

Polyaluminum chloride (PAC) is an inorganic polymer coagulant manufactured through controlled hydrolysis of aluminum salts.

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Engineering Analysis

Risks & Mitigation

Overdosing can cause excessive sludge volume
Incompatible with soft water (<50 mg/L CaCO₃ hardness)
Dust inhalation hazard during handling
Potential scaling in equipment at high concentrations

FMEA Triads

Trigger: Inaccurate dosing due to equipment calibration error
Failure: Poor coagulation efficiency, pH imbalance
Mitigation: Regular calibration of dosing pumps, implement automated monitoring with feedback control

Trigger: Material degradation from moisture absorption during storage
Failure: Reduced reactivity, clogging in feeding systems
Mitigation: Store in sealed containers with desiccants, maintain humidity below 60%

Trigger: Incompatibility with low-hardness source water
Failure: Insufficient floc formation, increased turbidity in treated water
Mitigation: Conduct water quality analysis, adjust dosage or consider alternative coagulant aids

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±5% of specified calcium content, particle size distribution within ±10% of specification

Test Method

ASTM D511, ISO 6058 for calcium determination; ASTM E11 for particle size analysis; jar testing per ASTM D2035 for performance validation

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Calcium additive

Manufacturer profiles associated with Calcium additive.

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Frequently Asked Questions

How does calcium additive improve PAC coagulation efficiency?