【Product name】Cement accelerator aluminum sulfater
【Molecular formula】AL2(SO4)3
【HS code】2833220000
【CAS code】10043-01-3
【Implementation standard】HG/T 2225-2018
【Product form】Powdered, Granulate
【Packaging】Laminated woven bag or lined plastic bag. 50kg/bag; 25kg/bag; 500kg/bag;1000kg/bag or customized according to customer requirements.
Cement Accelerator Aluminum Sulfate's main component is Al₂(SO₄)₃·14–18H₂O (purity ≥98%, water solubility ≥99%), a strong electrolyte inorganic accelerator; it accelerates the hydration reaction of C₃A and C₃S by releasing Al³⁺, shortening the initial setting time by 30–60%.
pH Adaptability Range
① Working pH Range
Actively stable within pH 3.0–7.0.
② Effect of pH on Coagulation Rate
The lower the pH, the faster the reaction; neutral conditions provide better control.
③ System Compatibility
Compatible with water-based and cross-linked systems; does not disrupt rheological structures.
Product Parameters
|
Index requirements of aluminum sulfate used as cement accelerator |
|
|
Indicators |
Standard value |
|
Alumina (AL2O3) content, % |
≥16.0 |
|
Iron (Fe) content, % |
≤0.005 |
|
(Water-insoluble matter) content, % |
≤ 0.1 |
|
PH (1% aqueous solution) content, % |
≥ 3.0 |
|
Sieve analysis |
10-20 mesh |
Coagulation Effects
① Improved Viscosity: Adding 0.5–2.0% (bwoc) increases fluidity by 15–25%.
② Low Residue: Solid residue ≤0.1%, reducing the risk of clogging.
③ Adjustable Setting Time: A dosage of 0.3–3% can control initial setting within 5–30 minutes.
Application Areas
① Conventional Oil and Gas Well Cementing: Shortens setting time and improves cementing efficiency.
② Shale Gas Horizontal Wells: Suitable for rapid cementing of long horizontal sections.
③ Tight Reservoir Stimulation: Enhances early strength and facilitates rapid fracturing.
④ Water-based Cement Slurry Systems: Applicable to freshwater and mineralized water systems.
⑤ Cross-linked Guar Gum Application: Compatible and stable with polymer systems.
Related Processes
① Addition Method: Dry powder premixing or solution pumping.
② Addition Stage: Add evenly during the slurry mixing stage.
③ Compatibility: Compatible with water-reducing agents, retarders, defoamers, etc.
Batch Stability
① Raw Material Control: Impurities ≤ 0.5%.
② Composition Analysis: Al₂O₃ and SO₄²⁻ tested batch by batch.
③ Performance Testing: Tested according to ASTM C191 and C109.
④ Batch Deviation: Crystallization water fluctuation ≤ ±0.5%.
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