Chlorination roasting of zinnwaldite with CaCl2 and CaCO3 for the extraction of Li, K and Rb
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43933655" target="_blank" >RIV/60461373:22310/25:43933655 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0892687525003036" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0892687525003036</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.mineng.2025.109475" target="_blank" >10.1016/j.mineng.2025.109475</a>
Alternative languages
Result language
angličtina
Original language name
Chlorination roasting of zinnwaldite with CaCl2 and CaCO3 for the extraction of Li, K and Rb
Original language description
This study investigated alkali metal extraction from zinnwaldite using chlorination roasting with CaCl2 and CaCO3. It was found that increasing the ratio of CaCO3 and zinnwaldite in the roasting mixture up to 3:1 significantly increased the efficiency of alkali metal extraction. The reactions in roasting mixture components occurred below 500 degrees C on the surface of zinnwaldite particles. Decomposition of zinnwaldite and CaCO3 began around 600 degrees C, leading to the formation of new CaO-SiO2-based phases. The maximal extraction of 96 % of Li, 96 % of K, and 100 % of Rb was achieved at 850 degrees C when the mixture of CaCO3/zinnwaldite at the ratio of 4:1 was used with significant volatilization of alkali metal chlorides. The formation of an amorphous glass phase associated with compaction of material above 850 degrees C did not affect the extraction of K and Rb, but it considerably constrained the extraction of Li due to immobilization of its ions in the glassy matrix. The additional limiting factor for Li extraction was the binding of chlorine in stable phases. Adding CaCO3 to the roasting mixture was found to prevent the release of HCl, HF or Cl2 during roasting. Li2CO3 was precipitated from leachate prepared from sinters obtained under the optimal sintering conditions and subsequently recrystallized from demineralized water, achieving battery grade purity of 99.80 %.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10500 - Earth and related environmental sciences
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
MINERALS ENGINEERING
ISSN
0892-6875
e-ISSN
0892-6875
Volume of the periodical
231
Issue of the periodical within the volume
231
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
nestránkováno
UT code for WoS article
001503935900001
EID of the result in the Scopus database
2-s2.0-105006875393