Beneficiation of Li-bearing sedimentary claystone by centrifugation

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering Pub Date : 2024-10-14 DOI:10.1016/j.mineng.2024.109042

Angela Manka Tita , Emmanuel Atta Mends , Shokrullah Hussaini , John Thella , York Smith , Pengbo Chu

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引用次数: 0

Abstract

The global shift towards electrification has led to an unprecedented demand for lithium (Li) – a key element in Li-ion battery technology. Sedimentary claystones found in Nevada have recently emerged as a new resource for Li. However, these claystones pose challenges to process due to their intricate and complex mineral composition. One of the significant challenges is that the claystones contain significant amounts of carbonate minerals such as calcite, which results in excessive processing reagent consumption. This study investigates the application of centrifugation as a gravity separation method for removing calcite from one Nevada sedimentary claystone. By varying the centrifugation time and rotation speed (RPM), a maximum of 81 % Li recovery with 82 % calcium (Ca) rejection can be obtained in the clay fraction. The study also showed that the beneficiation can reduce acid consumption during the leaching process by approximately 14 %. This study not only validates centrifugation as an effective technique to upgrade the Li sedimentary claystones, but also encourages further research of advanced gravity separation technologies for the pre-treatment of Li-bearing sedimentary claystones.

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利用离心法选矿含锂沉积粘土岩

全球向电气化的转变导致了对锂（Li）前所未有的需求，而锂（Li）是锂离子电池技术的关键元素。最近，内华达州发现的沉积粘土岩成为锂的新资源。然而，这些粘土岩因其错综复杂的矿物成分而给加工带来了挑战。其中一个重大挑战是粘土岩中含有大量的碳酸盐矿物，如方解石，这导致了过多的加工试剂消耗。本研究调查了离心分离法作为重力分离法的应用，以去除内华达州一种沉积粘土岩中的方解石。通过改变离心时间和转速（RPM），粘土部分的锂回收率最高可达 81%，钙（Ca）去除率为 82%。研究还表明，选矿可将浸出过程中的酸消耗量减少约 14%。这项研究不仅验证了离心分离法是提升锂沉积粘土岩的有效技术，还鼓励进一步研究先进的重力分离技术，用于含锂沉积粘土岩的预处理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Minerals Engineering 工程技术-工程：化工

CiteScore

8.70

自引率

18.80%

发文量

519

审稿时长

81 days

期刊介绍： The purpose of the journal is to provide for the rapid publication of topical papers featuring the latest developments in the allied fields of mineral processing and extractive metallurgy. Its wide ranging coverage of research and practical (operating) topics includes physical separation methods, such as comminution, flotation concentration and dewatering, chemical methods such as bio-, hydro-, and electro-metallurgy, analytical techniques, process control, simulation and instrumentation, and mineralogical aspects of processing. Environmental issues, particularly those pertaining to sustainable development, will also be strongly covered.