Inorganic Chemicals Industry ›› 2022, Vol. 54 ›› Issue (5): 101-108.doi: 10.19964/j.issn.1006-4990.2021-0681
• Environment·Health·Safety • Previous Articles Next Articles
XU Qingying1(),YANG Dingyi1,2(),LÜ Wei3,LI Xiang1,QIAN Yunfeng1,DU Baocong1
Received:
2021-11-10
Online:
2022-05-10
Published:
2022-05-31
Contact:
YANG Dingyi
E-mail:1054249887@qq.com;ydy1991@163.com
CLC Number:
XU Qingying,YANG Dingyi,LÜ Wei,LI Xiang,QIAN Yunfeng,DU Baocong. Effect of grinding time on properties of phosphogypsum based cementitious materials[J]. Inorganic Chemicals Industry, 2022, 54(5): 101-108.
Table 4
Content of three phase composition of phosphogyp?sum at 120 ℃ for different time of heat treatment"
时间/ min | w(CaSO4· 2H2O)/% | w(CaSO4· 1/2H2O)/% | w(CaSO4)/ % | w(其他)/ % |
---|---|---|---|---|
0 | 87.6 | 2.4 | 0.0 | 10.0 |
30 | 60.4 | 18.2 | 11.3 | 10.1 |
40 | 53.1 | 22.6 | 13.2 | 11.1 |
50 | 42.3 | 31.2 | 15.6 | 10.9 |
60 | 25.7 | 49.5 | 16.2 | 8.6 |
70 | 24.2 | 42.3 | 22.1 | 11.4 |
80 | 21.1 | 40.7 | 28.6 | 9.6 |
90 | 19.5 | 37.6 | 33.3 | 9.6 |
100 | 16.2 | 34.3 | 38.4 | 11.1 |
110 | 14.6 | 30.5 | 44.2 | 10.7 |
120 | 13.4 | 28.2 | 47.1 | 11.3 |
Table 5
Content of three phase composition of phosphogyp?sum at 130 ℃ for different time of heat treatment"
时间/ min | w(CaSO4· 2H2O)/% | w(CaSO4· 1/2H2O)/% | w(CaSO4)/ % | w(其他)/ % |
---|---|---|---|---|
0 | 87.6 | 2.4 | 0.0 | 10.0 |
30 | 48.4 | 29.5 | 12.2 | 9.9 |
40 | 40.2 | 34.6 | 15.1 | 10.1 |
50 | 28.4 | 43.1 | 18.7 | 9.8 |
60 | 10.5 | 60.5 | 20.2 | 8.8 |
70 | 10.1 | 53.1 | 25.5 | 11.3 |
80 | 8.3 | 49.4 | 31.8 | 10.5 |
90 | 9.1 | 27.7 | 50.5 | 12.7 |
100 | 8.2 | 20.3 | 58.5 | 13.0 |
110 | 4.4 | 20.2 | 62.8 | 12.6 |
120 | 2.1 | 12.7 | 74.6 | 10.6 |
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