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Low-grade clay type lithium resource comprehensive utilization process
The invention relates to the technical field of lithium recovery, in particular to a low-grade clay type lithium resource comprehensive utilization process which comprises the following steps: S1, grinding raw ore into fine particles, and sequentially performing constant-temperature roasting, constant-temperature acid leaching, filtering and washing to obtain leached residues and a leached solution; s2, adding ammonium sulfate into the leaching solution, and filtering to obtain an aluminum ammonium sulfate crude product and crystallization tail liquid; s3, after new acid and water are supplemented into the crystallization tail liquid, the crystallization tail liquid is used for constant-temperature acid leaching again; s4, repeating the steps S1 to S3 for multiple times to obtain lithium-rich crystal tail liquid; s5, concentrating the lithium-rich crystallization tail liquid, adding NaOH to remove impurities, and then carrying out evaporation concentration, cooling, crystallization and filtration to obtain sodium sulfate crystals; s6, carrying out lithium carbonate precipitation on the lithium-rich crystallization tail liquid; according to the method, aluminum in the leachate is efficiently separated, and an aluminum ammonium sulfate product is prepared; and lithium resources are effectively enriched, and finally, a green and efficient comprehensive utilization process of almost no tail and no wastewater discharge of the clay type lithium ore is realized.
本发明涉及锂回收技术领域，具体涉及一种低品位黏土型锂资源综合利用工艺，包括以下步骤：S1.将原矿磨至细粒后，依次进行恒温焙烧、恒温酸浸、过滤和洗涤，得到浸出渣和浸出溶液；S2.向所述浸出溶液中加入硫酸铵，过滤得到硫酸铝铵粗产品和结晶尾液；S3.向所述结晶尾液中补加新酸和水后，再次用于所述恒温酸浸；S4.多次重复步骤S1‑S3，获得富锂结晶尾液；S5.将所述富锂结晶尾液浓缩后，加入NaOH进行除杂，然后经蒸发浓缩、冷却、结晶、过滤得到硫酸钠晶体；S6.对所述富锂结晶尾液进行碳酸锂沉淀；本发明浸出液中铝得到了高效分离，并制备了硫酸铝铵产品；锂资源有效富集，最终实现黏土型锂矿几乎无尾无废水排放的绿色高效综合利用工艺。
Low-grade clay type lithium resource comprehensive utilization process
The invention relates to the technical field of lithium recovery, in particular to a low-grade clay type lithium resource comprehensive utilization process which comprises the following steps: S1, grinding raw ore into fine particles, and sequentially performing constant-temperature roasting, constant-temperature acid leaching, filtering and washing to obtain leached residues and a leached solution; s2, adding ammonium sulfate into the leaching solution, and filtering to obtain an aluminum ammonium sulfate crude product and crystallization tail liquid; s3, after new acid and water are supplemented into the crystallization tail liquid, the crystallization tail liquid is used for constant-temperature acid leaching again; s4, repeating the steps S1 to S3 for multiple times to obtain lithium-rich crystal tail liquid; s5, concentrating the lithium-rich crystallization tail liquid, adding NaOH to remove impurities, and then carrying out evaporation concentration, cooling, crystallization and filtration to obtain sodium sulfate crystals; s6, carrying out lithium carbonate precipitation on the lithium-rich crystallization tail liquid; according to the method, aluminum in the leachate is efficiently separated, and an aluminum ammonium sulfate product is prepared; and lithium resources are effectively enriched, and finally, a green and efficient comprehensive utilization process of almost no tail and no wastewater discharge of the clay type lithium ore is realized.
本发明涉及锂回收技术领域，具体涉及一种低品位黏土型锂资源综合利用工艺，包括以下步骤：S1.将原矿磨至细粒后，依次进行恒温焙烧、恒温酸浸、过滤和洗涤，得到浸出渣和浸出溶液；S2.向所述浸出溶液中加入硫酸铵，过滤得到硫酸铝铵粗产品和结晶尾液；S3.向所述结晶尾液中补加新酸和水后，再次用于所述恒温酸浸；S4.多次重复步骤S1‑S3，获得富锂结晶尾液；S5.将所述富锂结晶尾液浓缩后，加入NaOH进行除杂，然后经蒸发浓缩、冷却、结晶、过滤得到硫酸钠晶体；S6.对所述富锂结晶尾液进行碳酸锂沉淀；本发明浸出液中铝得到了高效分离，并制备了硫酸铝铵产品；锂资源有效富集，最终实现黏土型锂矿几乎无尾无废水排放的绿色高效综合利用工艺。
Low-grade clay type lithium resource comprehensive utilization process
低品位黏土型锂资源综合利用工艺
JIANG PENG (author) / XIONG WENLIANG (author) / LI CHENGXIU (author) / CHENG RENJU (author) / LIU XING (author) / ZHOU BAO (author) / DU WENYANG (author)
2023-06-30
Patent
Electronic Resource
Chinese
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