Research Article
Municipal Sewage Sludge Drying Treatment by an Composite Modifier
Table 2
Chemical composition of quicklime, Portland cement, slag, cement clinker, and dihydrate gypsum (wt%).
| | CaO | SiO2 | Al2O3 | Fe2O3 | SO3 | MgO |
| | Quicklime |
81.12
| |
0.49
|
0.09
|
0.04
|
0.01
| | Portland cement |
59.82
|
24.13
|
6.35
|
3.57
|
2.24
|
0.98
| | Slag |
37.68
|
30.46
|
14.95
|
1.12
|
1.95
|
9.9
| | Cement clinker |
63.83
|
21.48
|
4.72
|
3.63
|
0.67
|
3.70
| | Dihydrate gypsum |
42.87
|
4.2
|
0.25
|
0.05
|
44.22
|
1.17
|
|
|
