磷钾伴生矿钾浸出机理及热力学研究

IF 1.3 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Main Group Chemistry Pub Date : 2022-04-20 DOI:10.3233/mgc-210177

Yan Zhu, Liang Li, Quan Qi

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引用次数: 0

摘要

本文主要研究了磷酸钾伴生矿物中钾矿物酸水解转化为可溶性钾的工艺，并探讨了钾在浸出过程中的浸出机理。研究表明，在酸浸体系中，[H +] = 8.71 mol L-1, m NH4F:m phospushbox钾关联矿= 0.25，在413 K条件下，2 H钾的浸出率可达74%。而钾离子的释放是“氧化”和“离子交换”相互作用的结果。从K-(Si)-(P)-(F)- h2o体系的Eh-pH图中可以发现，当K- h2o体系中出现P-F或Si-F时，K +稳定区变窄，过量的氟不利于K +在水溶液中的稳定性。

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Study on the mechanism and thermodynamics of potassium leaching from phosphorus-potassium associated ore

This paper has mainly focused on the technology of transforming potassium minerals from phosphate-potassium associated minerals into soluble potassium by acid hydrolysis, and discussed the leaching mechanism of potassium in the process of leaching. As it is shown from the research, in the acid leaching system, [H +] = 8.71 mol L–1, m NH4F:m phosphorushboxpotassiumassociatedore = 0.25, the leaching rate of potassium reaches 74% at 413 K for 2 h. And the release of potassium ion is the result of the interaction of “oxidation” and “ion exchange”. It was found from the Eh-pH diagram of K-(Si)-(P)-(F)-H2O system that, when P-F or Si-F appeared in K-H2O system, the K + stable region became narrow, and the excess fluorine was not conducive to the stability of K + in aqueous solution.

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来源期刊

Main Group Chemistry 化学-化学综合

CiteScore

2.00

自引率

26.70%

发文量

审稿时长

>12 weeks

期刊介绍： Main Group Chemistry is intended to be a primary resource for all chemistry, engineering, biological, and materials researchers in both academia and in industry with an interest in the elements from the groups 1, 2, 12–18, lanthanides and actinides. The journal is committed to maintaining a high standard for its publications. This will be ensured by a rigorous peer-review process with most articles being reviewed by at least one editorial board member. Additionally, all manuscripts will be proofread and corrected by a dedicated copy editor located at the University of Kentucky.