Inorganic Chemicals Industry ›› 2024, Vol. 56 ›› Issue (1): 114-120.doi: 10.19964/j.issn.1006-4990.2023-0141
• Environment·Health·Safety • Previous Articles Next Articles
XIANG Mengqi1(), MENG Hua2(), WANG Ye1, MENG Xianzhang3, BAI Yuhang1, WANG Yujunyao1, ZHANG Yidan1
Received:
2023-03-14
Online:
2024-01-10
Published:
2024-01-18
Contact:
MENG Hua
E-mail:1131638127@qq.com;mhua08@163.com
CLC Number:
XIANG Mengqi, MENG Hua, WANG Ye, MENG Xianzhang, BAI Yuhang, WANG Yujunyao, ZHANG Yidan. Study on kinetic of iron leaching from titanium gypsum and its cyclic acid leaching process[J]. Inorganic Chemicals Industry, 2024, 56(1): 114-120.
Table 1
Common application directions and characteristics of titanium gypsum"
应用方向 | 优点 | 缺点 | |
---|---|---|---|
不除铁 利用 | 水泥缓释剂 | 成本低,现今主要消纳方式 | 附加值低,水泥掺量有限(5%) |
路基材料 | 成本低,消纳较大 | 暂无标准,水泥掺量有限(10%) | |
复合胶凝材料 | 成本低,用量大 | 力学性能稍显不足 | |
土壤改性剂 | 成本低 | 附加值低 | |
生态复合肥 | 成本低 | 附加值较高,技术尚不成熟 | |
除铁 利用 | 二水β石膏 | 可在废酸中和时分级制备 | 附加值一般 |
半水β石膏 | 附加值提高,可作胶凝材料 | 除铁、烘干成本有所增加 | |
半水α石膏 | 附加值高,可作建筑材料 | 除铁、转晶成本较高 | |
石膏晶须 | 附加值高,可作增强耐磨材料 | 除铁、转晶成本较高 |
Table 3
Fitting parameters for leaching kinetics of iron in titanium waste acid leachate"
T/K | 化学反应控制 | 反应物内部扩散控制 | Logarithmic 速率控制 | 可逆的晶化过程控制 | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
ln k | R2 | ln k | R2 | ln k | R2 | ln k | R2 | |||||
313.15 | 0.974 32 | 9.225 80 | 0.974 02 | 9.930 96 | 0.974 47 | 9.016 36 | 0.883 53 | 0.836 95 | ||||
323.15 | 0.970 86 | 8.592 85 | 0.970 87 | 9.286 53 | 0.970 84 | 8.387 70 | 0.893 82 | 0.747 43 | ||||
333.15 | 0.965 31 | 8.026 98 | 0.964 25 | 8.727 23 | 0.966 35 | 7.813 90 | 0.994 09 | 0.900 54 | ||||
343.15 | 0.966 89 | 7.159 67 | 0.960 31 | 7.908 44 | 0.971 89 | 6.907 76 | 0.980 07 | 3.340 20 |
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