Calcium hydroxide is a fine white powder, commonly known as hydrated lime and slaked lime. It is odorless and slightly bitter in taste. It is slightly soluble in water. After adding water, it has two layers. The upper aqueous solution is called clarified lime water, which can test carbon dioxide. The lower suspension is called lime milk or lime slurry, which can be used as building materials.
Calcium hydroxide is a fine white powder, commonly known as hydrated lime and slaked lime. It is odorless and slightly bitter in taste. It is slightly soluble in water. After adding water, it has two layers. The upper aqueous solution is called clarified lime water, which can test carbon dioxide. The lower suspension is called lime milk or lime slurry, which can be used as building materials.
1. Sewage treatment:
1.1 Calcium hydroxide used in wastewater can neutralize free acids in wastewater.
1.2 Calcium hydroxide used in wastewater can neutralize acid salts in wastewater.
1.3 Calcium hydroxide is used in wastewater, in which hydroxide ions in calcium hydroxide can react with metal ions to produce water-insoluble precipitates.
1.4 When calcium hydroxide is used in wastewater, the pH value of wastewater can be adjusted to alkalinity, so that metal hydroxide can be precipitated better.
2. Agriculture:
It is used in agriculture to reduce soil acidity and improve soil structure;
3. Flue gas desulfurization:
It is mainly used to neutralize acid gases such as sulfur dioxide, sulfur trioxide and a small part of fluoride ions and chloride ions, so that the sulfur content of the discharged flue gas meets environmental protection standards.
4. Sugar production process:
In the process of sugar making, calcium hydroxide should be used to neutralize the acid in the syrup, and then carbon dioxide should be introduced to make the remaining calcium hydroxide turn into precipitate and filter it out, so as to reduce the sour taste of sugar.
5. Paint:
Calcium hydroxide reacts with carbon dioxide in the air to produce calcium carbonate, which can help coagulation.
6. Metallurgical industry:
In this industry, in order to coat the metal surface, the impurities (including metal oxides) on the metal surface should be removed first, so dilute sulfuric acid should be used to remove them first. The waste water produced in the production process should be neutralized by calcium hydroxide.
7. Leather manufacturing industry:
It is mainly used for carding technology in leather manufacturing industry.
8. Refractory materials:
Calcium hydroxide can be used as an additive to enhance the strength and viscosity of silica bricks. Silica bricks are made of silica with a SiO4 _ 4 content of not less than 96%, mineralizers (such as mill scale, lime milk) and binders (such as molasses and sulfite pulp waste liquid) are added, and then they are mixed, molded, dried and sintered.
9. Food:
Calcium hydroxide is widely used as food additive because of its strong activity and loose structure.
10. Medical uses:
Medicine shows that calcium deficiency in human body will cause a series of physiological problems, such as hypertension, osteoporosis, stones and other diseases. Calcium hydroxide can be used as the main raw materials for the synthesis of calcium agents and calcium cyclopropanate and calcium lactate.
11. Organic biosynthesis:
Used in the synthesis of high-tech biomaterial HA and feed additive VC phosphate ester.
12. aquaculture:
Used for disinfection and bacteriostasis of farms, keeping the breeding environment sanitary.
13. Rubber technology:
It is used in the processing of rubber technology to make it easier to form, improve the hardness of products, increase the volume of products and reduce costs.
14. Paper industry:
Used for removing impurities and bleaching in pulp and preventing paper from deterioration.
