Guigang Lime Plant: What is the difference between effective calcium and calcium oxide

Guigang Lime Plant: The effective calcium oxide content is greater than or equal to the calcium oxide content. The calcium oxide content is a comprehensive analysis of quicklime, which includes impurities and raw materials. Removing impurities and raw materials is the effective calcium oxide content. Below, let me explain the differences between these three!

Calcium oxide is an inorganic compound with the chemical formula CaO, commonly known as quicklime. The physical property is a yellow powder on the surface, with impurities appearing as gray white, and impurities appearing as light yellow or black. It has hygroscopicity.

Calcium oxide is an alkaline oxide that is sensitive to moisture. Easy to absorb oxygen and moisture from the air. Reacts with water to produce calcium hydroxide (Ca (OH) 2) and generates a large amount of heat, which is corrosive.

Effective calcium oxide is a physical substance with the chemical formula CaO.

calcium oxide

The determination of effective calcium oxide content in lime refers to the free state of calcium oxide, excluding calcium carbonate, calcium silicate, and other calcium in lime. The quality of lime depends on the effective calcium oxide content. High quality lime should have a calcium oxide content of 95%, while low-quality lime should have a content of less than 50%. Industrial use should have a content of 60%.

The effective calcium oxide in lime, abbreviated as "effective calcium", refers to the active portion of calcium oxide that can rapidly esterify to produce calcium hydroxide. Due to the temperature of the roasting process, some calcium oxide cannot undergo esterification reaction quickly when it comes into contact with water and still exists in the form of free calcium oxide. This type of free calcium oxide at the bottom of the water is also known as overcooked calcium oxide; In addition, lime is usually rich in small amounts of calcium compounds such as calcium silicate, calcium aluminate, and calcium ferrite, which are all non active calcium salts and therefore not considered effective calcium.

Guigang Lime Plant:

1. The calcium oxide content value is the concentration of calcium oxide in the quicklime mixture; The effective calcium content refers to the concentration of calcium element in it.

2. The effective calcium oxide content is greater than or equal to the calcium oxide content, which is a comprehensive analysis of quicklime, including impurities and raw materials. Removing impurities and raw materials is the effective calcium oxide content.

3. High temperature calcination of limestone generates calcium oxide: CaCO3, low-temperature CaO+CO2 ↑;

Calcium oxide reacts with water: CaO + H2O = Ca(OH)2；

Reaction between calcium oxide and dilute hydrochloric acid: CaO + 2HCl = CaCl2 + H2O；

Guigang Lime Plant:

1. Can be used as a filler, for example: as a filler for epoxy adhesives;

2. Used as analytical reagent, carbon dioxide absorber for gas analysis, spectral analysis reagent, high-purity reagent for epitaxial and diffusion processes in semiconductor production, drying of laboratory ammonia and ethanol dehydration, etc.

3. As a raw material, it can be used to manufacture calcium carbide, soda ash, bleaching powder, etc. It is also used in papermaking, wastewater purification, calcium hydroxide and various calcium compounds;

4. Can be used as a fluxing agent for building materials, metallurgy, cement accelerators, and fluorescent powders;

5. Used as a vegetable oil decolorizer, drug carrier, soil amendment, and calcium fertilizer;

6. It can also be used for refractory materials and desiccants;

7. Used for alkaline waste liquid treatment and sludge quenching;

8. It can also be used as a shutdown protection agent for furnaces, utilizing the moisture absorption ability of lime to keep the metal surface of the furnace water vapor system dry and prevent corrosion. It is suitable for long-term shutdown protection of low-pressure, medium pressure, and small capacity steam drum boilers;

9. Calcium hydroxide can be prepared by reacting with water, reaction equation: CaO+HO=Ca（OH）， It belongs to a chemical reaction.

The editor of Guangxi Lime reminds you:

Transportation precautions: The packaging should be intact and the loading should be stable during shipment. During transportation, it is necessary to ensure that the container does not leak, collapse, collapse, or be damaged. It is strictly prohibited to mix and transport with flammable or combustible materials, acids, edible chemicals, etc. Transport vehicles should be equipped with leak emergency response equipment during transportation. It is not suitable for transportation on rainy days.

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