制品技术规格

Main technical parameters:
Item	Aluminium Sulphate for water treatment
Specification	Class I (solid)
Properties	This product is a white to light yellow solid block
Main component	aluminum sulfate (calculated as alumina) : ≥ 15.69%
Net weight	25KG
Validity period	one year

introduction

Aluminium Sulphate (Al₂(SO₄)₃·xH₂O, Al₂O₃≥17%, insoluble matter≤0.2%) is a highly soluble inorganic flocculant; it hydrolyzes to generate Al(OH)₃ colloid, which achieves rapid turbidity removal, decolorization, and phosphorus reduction through charge neutralization and entrapment.

Product Parameters

Aluminum sulfate in drinking water: Water treatment index requirements
Indicators	Standard value	Test value
Alumina (AL2O3) content, %	≥16.0	16.25
Iron (Fe) content, %	≤0.2	0.15
(Water insoluble matter) content, %	≤ 0.1	0.01
PH (1% aqueous solution) content, %	≥ 3.0	3.18
Particle size	0-20mm	0-20mm

pH Adaptability Range

Optimal Range: pH 5.5–7.5 Complete hydrolysis, dense flocs, and highest removal rate.

Suitable for low-alkalinity water: pH ≥ 4.5 Suitable for low-alkalinity raw water; lime adjustment may be necessary.

Alkalinity Adjustment Capacity: Hydrolysis produces H⁺, which can lower the pH of high-alkalinity water.

Coagulation Effect

Rapid Charge Neutralization
Al³⁺'s high charge density rapidly disrupts colloidal stability.

Large Flocs and Rapid Settling
Forms dense Al(OH)₃ flocs, improving settling efficiency.

Highly Efficient Decolorization and Turbidity Removal
Suspended solids and color removal rates can reach 85%–95%.

Simultaneous Phosphorus and COD Reduction
Adsorption and precipitation reduce total phosphorus and some organic matter.

Application Areas

Municipal Waterworks: Raw water purification, reduction of turbidity and color.

Industrial Wastewater Treatment: Coagulation and sedimentation of wastewater from dyeing, papermaking, leather tanning, and food processing industries.

Paper Industry: Sizing flocculant and retention/filtration aid.

Mining and Metallurgical Industries: Tailings water clarification treatment.

Circulating Water Systems: Suspended solids control and system purification.

Related Processes

Dissolution and Dosing Process: Dissolve the substance at a concentration of 5%–10% and add it using a metering pump to ensure uniform reaction.

Rapid Mixing + Slow Flocculation: Rapid mixing (≥200 rpm) in the initial stage promotes hydrolysis, while slow mixing in the subsequent stage forms large flocs.

Sedimentation or Flotation Separation: Combine with inclined plate sedimentation tanks or flotation systems to improve solid-liquid separation efficiency.

Sludge Depressurization Treatment: The resulting aluminum salt sludge has a stable structure, which is conducive to mechanical dewatering.

Batch Stability

① Raw Material Control: High-purity bauxite or aluminum hydroxide is used as raw material, with iron content controlled to ≤0.5% to reduce the risk of water coloration.

② Active Ingredient Testing: Each batch is tested for Al₂O₃ content, pH value, and insoluble matter (≤0.2%), meeting industry standards.

③ Performance Consistency Testing: The consistency of flocculation rate and sedimentation effect is verified through a beaker coagulation experiment (Jar Test).

④ Batch Deviation Control: An online metering and automated reaction control system is used to ensure content fluctuations are ≤±0.3%.