Effect of Ball Milling Time on the Performance of
2022year1month11day · The ratio of PBG to balls was 1 : 1, and the samples were then grouped according to the duration of the ball milling process (10, 20, 30, 40, 50, 60, and 70 min), as shown in Table 2. Table ... The specific surface area of phosphate gypsum gradually increases as the ball milling time increases, reaching a maximum value of 2813.65 (S/V)
