High-purity, fine, and high-specific-surface-area calcium hydroxide (Ca(OH)₂), due to its excellent physicochemical properties—such as high reactivity, strong adsorption capacity, and good dispersibility—plays an important role in multiple industries. Below are its main applications and advantages:
Environmental Protection
Flue Gas Desulfurization (FGD)
Applied in coal-fired power plants, steel mills, and other industrial exhaust treatment. It efficiently absorbs sulfur dioxide (SO₂) to form gypsum (CaSO₄). High surface area and fineness significantly enhance reaction rate and desulfurization efficiency.
Wastewater Treatment
Neutralizes acidic wastewater and removes heavy metals through hydroxide precipitation. High purity minimizes interference from impurities, while high surface area improves adsorption capacity.
Solid Waste Treatment
Stabilizes fly ash from waste incineration, immobilizing heavy metals and reducing pollution.
Chemical and Materials Industry
Nanomaterial Synthesis
Used as a precursor for producing nano calcium carbonate (CaCO₃), hydroxyapatite, etc. High purity ensures product quality, and high surface area enhances reactivity.
Catalyst Carrier
Supports metal catalysts (e.g., precious metals), with high surface area providing more active sites.
Polymer Modification
Acts as a filler for plastics and rubber, improving mechanical properties or flame resistance. High fineness enhances uniform dispersion.
Pharmaceutical and Food Industry
Pharmaceutical Excipient
High-purity calcium hydroxide is used in dental materials (root canal filling), wound disinfection, or as a drug delivery carrier.
Food Additive
Applied as an acidity regulator (E526). High purity ensures compliance with food safety standards.
Construction and Building Materials
High-Performance Cement Additive
Accelerates cement hydration, improves early strength, and enhances slurry flowability due to fine particle size.
Eco-Friendly Building Materials
Used in calcium silicate boards and insulation materials. High reactivity improves material performance.
Agriculture and Soil Remediation
Soil Conditioner
Adjusts acidic soil pH and supplies calcium. Fine particle size allows better dispersion and uniform action.
Pesticide Carrier
Adsorbs pesticide components, enabling controlled release.
New Energy and Battery Industry
Lithium Battery Materials
Serves as a precursor for synthesizing lithium iron phosphate (LiFePO₄) cathode materials. High purity reduces impurity impact on battery performance.
Carbon Dioxide Capture
High surface area enhances CO₂ adsorption, supporting carbon capture and storage (CCUS) technologies.
Other Emerging Fields
Antibacterial Materials
Its alkalinity suppresses microbial growth, enabling use in antibacterial coatings or packaging.
Electronics Industry
High-purity calcium hydroxide is applied in semiconductor cleaning and electronic ceramics manufacturing.
Core Advantages
- High purity: Reduces impurity interference, suitable for sensitive fields such as pharmaceuticals, food, and electronics.
- High fineness (nano-scale particles): Improves dispersion and reaction uniformity, enhancing material performance.
- High specific surface area: Boosts adsorption, catalytic, and reaction activity, ideal for environmental and energy applications.
High-Specific-Surface-Area Calcium Hydroxide
Applied in SDS dry desulfurization as a substitute for sodium bicarbonate, solving the problem of hazardous sodium-based waste.
Product Parameters
- Calcium hydroxide content (dry basis): ≥85%
- Specific surface area: ≥40
- Fineness: >325 mesh
- Pore volume: ≥0.2
- Moisture content: <2%
Conclusion
High-specific-surface-area calcium hydroxide, with its unique combination of purity, fineness, and reactivity, is emerging as a versatile material across industries—from environmental protection to advanced energy storage—offering sustainable and high-performance solutions.
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