The yellow substance was gypsum, or calciumsulfate dehydrate, a common component of plaster.
这种黄色的物质叫做脱水硫化钙，通常是石膏的一种组成部分。
2
Is mainly composed of calcium magnesium sulfate, chloride and nitrate as the hardness of the form salts.
主要是由钙镁的硫酸盐、氯化物和硝酸盐等盐类所形成的硬度。
3
If industry wastes lime, calcined gypsum and sulfate are grinded with the high-calcium fly ash, activity increases, soundness improves, and activity index can meets the demand for S95slag.