What is the role and use of calcium oxide?

the role and use of calcium oxide:

1. It can be used as a filler, for example, as a filler for epoxy adhesives.

2. Used as analytical reagent, used as carbon dioxide absorbent in gas analysis, spectral analysis reagent, high purity reagent used in epitaxy and diffusion process in semiconductor production, drying of ammonia gas in laboratory and dehydration of alcohols, etc.

3, used as raw materials, can be made of calcium carbide, soda ash, bleaching powder, etc., but also used for tanning, waste water purification.

Note:

1. Calcium oxide exposed to the air for a long time will absorb carbon dioxide into powdered calcium carbonate, which will not play the role of pond cleaning and disinfection. Therefore, it is best to buy quicklime now, and choose the lighter and free of impurities. If the remaining quicklime is not used up at one time, it shall be sealed with plastic bag.

2. Calcium oxide should be sprinkled while it is hot after being added to the slurry. Do not pour the residue into the pool to prevent the fish from eating and dying. Do not throw the whole piece of lime into the pool for water disinfection.

3, calcium oxide and nitrogen fertilizer at the same time. Quicklime generates a large amount of OH when it meets water, which makes the NH-4OH to balance to the right. High ammonia content is easy to cause fish ammonia poisoning. Similarly, when the ammonia nitrogen content in the pool water is higher than 1.2 mg/L, it is not suitable to use quicklime. In addition, quicklime can be used every other week after ammonium nitrogen fertilizer is applied, and mixing is not to be used.

4, calcium oxide can not be mixed with phosphate fertilizer. After phosphorus fertilizer is applied, inorganic phosphorus mainly exists in the form of HPO and HPO when the pH is 6.5~7.5. If it is mixed with quicklime when the pH is greater than 7.5, it will react to generate Ca(PO), making effective phosphorus easy to form calcium salt precipitation and lose. Generally, phosphate fertilizer can be applied at least 10 to 15 days after applying quicklime.