Calcium hydroxide, or hydrated lime or lime, is an inorganic compound of Calcium dihydroxide with the chemical formula Ca (OH)2. It is a white powder or crystalline solid widely used in construction, agriculture, chemical and environmental protection, and other fields.
Application Area
1. Construction
* Concrete and mortar: Calcium dihydroxide is a component of traditional building materials used to make cement and lime mortars, which increase the strength and durability of building materials.
* Wall Painting: Used for wall painting as a lime slurry to help with moisture resistance and sterilization.
2. Agriculture
* soil improvement: calcium dihydroxide is used to neutralize acidic soils, increase soil pH, improve soil structure, and promote crop growth.
* Fungicides and disinfectants: These are used in crop pest control to help inhibit the growth of pathogens.
3. Chemical Industry
* Acid-base neutralization: used in chemical processes to neutralize acidic wastewater or gases to prevent pollution.
* Preparation of other compounds: calcium dihydroxide is the raw material used to prepare various calcium compounds, such as calcium chloride and sulfate.
4. Environmental protection.
* Wastewater treatment: used in wastewater treatment to neutralize acid wastewater, precipitate heavy metal ions, and improve treatment efficiency.
* Flue gas desulphurization: using flue gas desulphurization in coal-fired power plants reduces sulfur dioxide emissions and protects the environment.
5. Food Industry
* Food additives: used as acidity regulators, anti-caking agents, and fortification agents in food processing.
Calcium hydroxide (Calcium dihydroxide hydroxide) is a widely used compound with significant benefits in many fields due to its chemical and physical properties. Here are the main benefits of calcium dihydroxide:
1. Building and construction.
* Concrete and mortar calcium dihydroxide is used to make concrete and mortar to increase the strength and durability of building materials.
* Dampproof and mildew-proof: as a wall-painting material, it contributes to dampproof and mildew-proof and protects the structure and aesthetics of buildings.
2. Agricultural.
* Soil conditioner: calcium dihydroxide is used to neutralize acidic soils, increase soil pH, improve soil structure, promote plant growth, and increase crop yields.
* pest control: it can be used as a fungicide and disinfectant to help control pathogens and pests in soil and crops.
3. Water Treatment
* acid-base neutralization: in wastewater treatment, calcium dihydroxide is used to neutralize acidic wastewater, regulate water pH, and protect aquatic ecosystems.
* Precipitation of heavy metals: it can precipitate heavy metal ions from wastewater, improve the effectiveness of wastewater treatment, and reduce the discharge of pollutants.
4. Industrial Applications
* flue gas desulphurization: in coal-fired power plants and other industrial facilities, calcium dihydroxide is used for flue gas desulphurization to reduce sulfur dioxide emissions and reduce acid rain and air pollution.
* Chemical Reaction Neutralizer: in chemical production, it is used to neutralize acidic by-products, ensuring the safety and efficiency of the reaction.
5. Food industry
* Food additives: as an acidity regulator, calcium dihydroxide, and strengthening agent, they are often used in food processing to ensure food quality and safety.
* Sugar Processing: Sugar Processing is used to remove impurities in the process of sugar purification and to improve the purity and quality of sugar products.
6. Medical and dental
* medical dressings: calcium dihydroxide is used in some medical dressings to promote wound healing and prevent infection.
* Dental Applications: it is commonly used in dental treatments, such as root canal therapy, as a sealant and antibacterial agent to help protect teeth and oral health.
7. Environmental protection
* pollutant treatment: calcium dihydroxide can significantly treat pollutants, such as neutralizing industrial waste and reducing its toxicity and environmental hazards.
* ecological restoration: in some environmental restoration projects, calcium dihydroxide is used to regulate the pH of soil and water to restore the balance of the ecosystem.
Conclusion: calcium dihydroxide offers significant benefits in construction, agriculture, water treatment, industry, food, medicine, and environmental protection due to its wide range of applications and beneficial properties. The rational use of calcium dihydroxide can effectively improve production efficiency, product quality, environmental protection, and human health.
Safety and precautions.
* Corrosive: calcium dihydroxide is corrosive and irritating to the skin and eyes. Wear appropriate protective equipment such as gloves and goggles when handling.
* Inhalation hazards: Inhalation of calcium dihydroxide dust can cause respiratory irritation, and long-term exposure can lead to lung disease.
* Environmental Impact: avoid calcium dihydroxide dust entering the water body, which may harm aquatic organisms.
