Pilot scale experiments of magnesia hydration under gas-liquid-solid (three-phase) reaction system

Effect of different parameters on caustic magnesia hydration and magnesium hydroxide rheology: a review

“…Figure 6 shows a comparison between the degree of hydration of MgO of the three-phase reaction system and two-phase reaction with time. It was found that the degree of hydration of MgO of the three-phase hydration reaction system is significantly higher than that of the two-phase hydration reaction system [13].…”

“…Two-phase reaction systems such as gas-solid or liquid-solid or liquid-liquid hydration reaction systems are most studied to prepare magnesia. Recently other studies reported the advantages of a three-phase, namely, gas-liquid-solid hydration reaction system [13]. The study showed that three phase reaction is better than two phase reaction.…”

“…Magnesia powders with different parameters were selected, and their composition, particle size and the activity of citric acid were discussed. To make a comparative study between the powders size as shown in the table 3, the first and third sample of magnesia powder were selected with similar activity but different particle size with control pressure of 0.20MPa [13]. Magnesia with smaller particle size has a larger specific surface area, correspondingly, the contact area with water is larger, and therefore, the hydration rate is high.…”

“…% using MgO of particle size of 300 with 95% purity. Figure 5 shows the relationship between degrees of hydration under different reaction pressure with time [13].…”

“…However, after 30 min. the degree of hydration with the three slurry concentrations was not examined [13].…”