“…Calcium sulfate itself is an excellent cementing material and is rich in calcium and sulfur resources, which can be used as an artificial building material [ 5 , 6 , 7 , 8 , 9 , 10 ], a subgrade material [ 11 , 12 , 13 , 14 ], a backfill material [ 15 ], a ceramic material [ 16 ], and in the synthesis of new materials (such as nano-hydroxyapatite [ 17 , 18 , 19 , 20 ], nano-calcium carbonate [ 21 , 22 ], and calcium sulfate whisker [ 23 , 24 , 25 ]). It can also be used as a cement retarder [ 26 , 27 , 28 ], a water purification agent for adsorption of heavy metals [ 29 , 30 , 31 , 32 , 33 , 34 ], a soil conditioner [ 35 , 36 , 37 , 38 , 39 , 40 ], a slow-release nitrogen fertilizer [ 41 , 42 ], an agent in the coproduction of sulfuric acid for cement making [ 43 , 44 ], an asphalt improver [ 45 , 46 , 47 , 48 ], a plastic filler [ 49 , 50 , 51 ], an agent in carbon dioxide mineralization sequestration […”