Inorganic Chemicals Industry ›› 2022, Vol. 54 ›› Issue (4): 17-23.doi: 10.19964/j.issn.1006-4990.2021-0511
• Resource utilization of phosphogypsum • Previous Articles Next Articles
GU Qingshan(),LIN Xihua,Zhao Shihao,YUAN Yijin
Received:
2021-08-24
Online:
2022-04-10
Published:
2022-04-18
CLC Number:
GU Qingshan,LIN Xihua,Zhao Shihao,YUAN Yijin. Effect of different pretreatment processes on properties of phosphogypsum[J]. Inorganic Chemicals Industry, 2022, 54(4): 17-23.
Table 3
Proportion of three-phase components of phosphogypsum at different calcination temperature"
温度/ ℃ | w(附着水)/ % | w(可溶性 无水石膏)/% | w(半水 石膏)/% | w(二水 石膏)/% |
---|---|---|---|---|
45 | 0.00 | 1.65 | 0.00 | 92.76 |
150 | 0.05 | 0.00 | 83.22 | 9.36 |
250 | 0.00 | 32.56 | 43.47 | 4.61 |
350 | 0.00 | 52.97 | 10.93 | 3.12 |
450 | 0.00 | 1.75 | 10.21 | 2.03 |
550 | 0.00 | 12.29 | 1.29 | 1.41 |
650 | 0.00 | 2.19 | 0.74 | 0.66 |
750 | 0.00 | 11.63 | 0.06 | 0.00 |
Table 6
Effect of microwave calcination temperature on physical properties of phosphogypsum"
编号 | 煅烧温度/℃ | 标稠用水量/% | 凝结时间/min | 强度/MPa | ||||
---|---|---|---|---|---|---|---|---|
初凝 | 终凝 | 2 h抗折强度 | 2 h抗压强度 | 绝干抗折 强度 | 绝干抗压 强度 | |||
WB150 | 150 | 84.0 | 11 | 14 | 2.1 | 5.6 | 2.4 | 6.0 |
WB350 | 350 | 86.6 | 8 | 10 | 1.4 | 2.3 | 1.7 | 3.2 |
WB550 | 550 | 84.2 | 92 | 138 | 0.0 | 0.1 | 0 | 0.2 |
WB750 | 750 | 81.7 | — | — | 0.0 | 0.0 | 0.0 | 0.0 |
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