Inorganic Chemicals Industry ›› 2023, Vol. 55 ›› Issue (1): 56-63.doi: 10.19964/j.issn.1006-4990.2022-0471
• Development and utilization of lithium resources • Previous Articles Next Articles
LIU Darui(),XU Lijun,LI Shichun,CAO Kun,TU Ya,LI Wenqing,LIU Qingliang
Received:
2022-08-09
Online:
2023-01-10
Published:
2023-01-17
CLC Number:
LIU Darui,XU Lijun,LI Shichun,CAO Kun,TU Ya,LI Wenqing,LIU Qingliang. Research progress of recovery of strategic metal lithium from fly ash[J]. Inorganic Chemicals Industry, 2023, 55(1): 56-63.
Table 4
Characteristics of various lithium leaching processes"
方法 | 工艺 | 优点 | 缺点 | 对浸出液提锂的影响 |
---|---|---|---|---|
酸法 | 直接酸浸工艺 | 工艺简单,能耗和成本较低 | 对于锂活性较低的煤粉炉粉煤灰,往往很难获得高的浸出率,只适用于流化床粉煤灰 | 酸浸液成分复杂,锂的提取比较困难 |
烧结活化-酸浸工艺 | 可用于煤粉炉粉煤灰,获得较高的浸出率 | 工艺流程长,能耗和成本较高 | ||
碱法 | 预脱硅-烧结-浸出工艺 | 与传统拜耳法相似,工艺相对成熟 | 工艺复杂,能耗高,产渣量大 | 脱硅液、浸出液杂质简单,锂的提取比较容易 |
其他方法 | 酸碱联合工艺;多步逆流连续循环碱浸工艺 | 浸出率较高,能耗低 | 仍处于实验室小试研究阶段 | 浸出液杂质元素少,锂的提取比较容易 |
Table 5
Main chemical compositions of fly ash leachate and domestic salt lake brine"
样品 | ρ(Li+)/ (mg·L-1) | ρ(Na+)/ (mg·L-1) | ρ(K+)/ (mg·L-1) | ρ(Mg2+)/ (mg·L-1) | ρ(Ca2+)/ (mg·L-1) | ρ(Al3+)/ (mg·L-1) | n(Mg)/ n(Li) |
---|---|---|---|---|---|---|---|
扎布耶碳酸盐型盐湖卤水[ | 0.49 | 72.9 | 16.6 | 0.03 | 0.12 | — | 0.053 |
一里坪硫酸盐型盐湖卤水[ | 0.21 | 25.8 | 9.1 | 12.8 | 0.16 | — | 61 |
察尔汗氯化物型盐湖卤水[ | 0.03 | 23.7 | 12.5 | 48.9 | 0.51 | — | 1 577 |
粉煤灰酸浸液[ | 0.39 | 4.039 | 3.442 | 1.859 | 0.286 | 92.486 | 4.77 |
酸法结晶母液[ | 0.422 | 1.5 | 0.6 | 3.036 | 0.986 | 82.72 | 7.19 |
粉煤灰脱硅液[ | 0.049 | 101.29 | 0.724 | — | 0.031 8 | 0.453 | — |
粉煤灰碱浸液[ | 0.003 8 | — | — | — | — | — | — |
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