Inorganic Chemicals Industry ›› 2022, Vol. 54 ›› Issue (7): 105-109.doi: 10.19964/j.issn.1006-4990.2021-0594
• Industrial Techniques • Previous Articles Next Articles
ZHU Wanye1,2(),TANG Ding1,2,CHI Heting1,2,LIAO Xianghui1,2,ZHUANG Rongchuan1,2,WANG Qiankun1,2,SHEN Qingfeng1,2
Received:
2021-09-30
Online:
2022-07-10
Published:
2022-07-14
CLC Number:
ZHU Wanye,TANG Ding,CHI Heting,LIAO Xianghui,ZHUANG Rongchuan,WANG Qiankun,SHEN Qingfeng. Study on impurity removal rule of ferrous sulfate from by-product of titanium dioxide by crystallization purification[J]. Inorganic Chemicals Industry, 2022, 54(7): 105-109.
Table 1
Composition analysis results of ferrous sulfate of titanium dioxide by-product and requirementsfor impurity content of FeSO4·7H2O crystal for battery"
项目 | w(Fe) | w(Ti) | w(Mg) | w(Mn) | w(Na) | w(Ca) | w(Al) | w(Co) | w(Cr) | w(Cu) | w(Ni) |
---|---|---|---|---|---|---|---|---|---|---|---|
钛白副产硫酸亚铁 | 21.54 | 0.14 | 0.33 | 0.068 | <0.015 | <0.025 | <0.005 | <0.005 | <0.005 0 | <0.003 | <0.005 |
高纯七水硫酸亚铁晶体 (Q/WRN 0104—2016) | — | — | ≤0.025 | ≤0.05 | ≤0.015 | ≤0.025 | ≤0.005 | ≤0.005 | ≤0.005 | ≤0.003 | ≤0.005 |
Table 2
Analysis results of element content in solution before and after Ti removal by hydrolysis with different pH"
样品 | 体积/ mL | pH | Fe粉用量/g | ρ(Fe)/ (mg?L-1) | ρ(Ti)/ (mg?L-1) | ρ(Mg)/ (mg?L-1) | ρ(Mn)/ (mg?L-1) | ρ(Na)/ (mg?L-1) | Ti 去除率/% | Fe 损失率/% |
---|---|---|---|---|---|---|---|---|---|---|
原液 | 1 100 | 2.3 | — | 95 500 | 875.00 | 1 655 | 362.0 | 11.4 | — | — |
除Ti后液1 | 940 | 3.0 | 600 | 108 700 | 150.00 | 1 805 | 382.0 | 12.1 | 85.35 | 2.73 |
除Ti后液2 | 930 | 4.0 | 750 | 108 500 | 0.35 | 2 005 | 396.5 | 12.8 | 99.96 | 3.95 |
除Ti后液3 | 915 | 5.0 | 1 500 | 101 500 | 0.35 | 2 012 | 397.0 | 13.1 | 99.96 | 11.59 |
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