1. Responsiveness

The activity of Calcium Oxide CaO is usually expressed by the reaction rate of Calcium Oxide CaO with water, which refers to its ability to react with other substances in the slag, and is expressed by the melting speed of lime in the slag. It can also be said that within 10 minutes under standard atmospheric pressure, the number of milliliters of 4N-HCl aqueous solution consumed by 50 grams of Calcium Oxide CaO dissolved in constant temperature water at 40 degrees Celsius is defined as the activity of Calcium Oxide CaO.

2. Calcination time and temperature

The organizational structure of lime activity includes bulk density, porosity, specific surface area and grain size of Calcium Oxide CaO mineral. The smaller the grain size, the larger the specific surface area, the higher the porosity, the higher the activity of lime, and the stronger the chemical reaction ability. The activity of lime is closely related to the calcination temperature and calcination time.