Full
Outline
In order to make slag resource utilization and harmless treatment, CaO−MgO−Al2O3−SiO2 (CMAS) slag glass-ceramics were successfully prepared with different additions of cadmium using glass-ceramics preparation technology with solid wastes such as tailings and fly ash as main raw materials. The crystallization characteristics of glass-ceramics with different additions of cadmium were characterized by differential scanning calorimetry (DSC), XRD, SEM, and Raman spectrum. At the same time, the bulk density, flexural strength, thermal expansion coefficient, Vickers hardness and toxicity leaching concentration of glass-ceramics with different additions of cadmium were analyzed. The results show that with the increase of cadmium addition, the full width at half maximum of the crystallization peak gradually decreases, which promotes the crystallization of the glass-ceramics, but the main crystal phase does not change significantly. The related elements in the glass-ceramics are depolymerized due to the addition of cadmium, which changes the microstructure of the glass-ceramics. In addition, the flexural strength, Vickers hardness and bulk density of the glass-ceramics increase with the increase of cadmium slag addition. The results of toxicity leaching test indicate that the maximum leaching concentration of cadmium is 0.030 37 mg/L, which is far lower than the maximum leaching concentration of hazardous waste specified by the state.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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