Method for separating and extracting battery-grade lithium carbonate and rubidium and cesium salts from lepidolite

A technology of lithium carbonate and lepidolite, applied in lithium carbonate;/acid carbonate, chemical instruments and methods, rubidium/cesium/francium compounds, etc., can solve the difficulty in realizing industrialized production, the ratio of input to output Insufficient, low comprehensive production efficiency and other problems, to achieve the effect of reducing production costs

Active Publication Date: 2019-12-10
河北铸合集团兴隆县矿业有限公司
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Problems solved by technology

[0005] Judging from the current existing production technology, the comprehensive extraction of lithium carbonate, rubidium, cesium, potassium and other resources is not ideal, the comprehensive production efficiency is not high, and the ratio of input to output is insufficient, so it is difficult to realize industrial production

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  • Method for separating and extracting battery-grade lithium carbonate and rubidium and cesium salts from lepidolite
  • Method for separating and extracting battery-grade lithium carbonate and rubidium and cesium salts from lepidolite
  • Method for separating and extracting battery-grade lithium carbonate and rubidium and cesium salts from lepidolite

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Embodiment 1

[0066] The concentrations involved in the examples are all mass concentrations, and the descriptions of the above-mentioned embodiments shall prevail for the unspecified parts in the following examples.

[0067] The preparation method of the present invention is to carry out controllable directional reconstruction to the lepidolite mineral structure under the condition of variable temperature and normal pressure, so that alkali metals (lithium, potassium, sodium, rubidium, cesium) can be extracted from the lepidolite mineral in the form of soluble salts. Released; various circulation methods such as leaching solution circulation and lithium extraction mother liquor circulation are adopted to control the concentration of potassium, sodium, rubidium and cesium in the mother liquor of each process, and through the orderly combination of evaporation concentration and crystallization technologies, lithium, potassium, and sodium Effective separation and comprehensive utilization of r...

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Abstract

The invention discloses a method for separating and extracting battery-grade lithium carbonate and rubidium and cesium salts from lepidolite. Lepidolite is adopted as a raw material, an acidificationroasting method is implemented, and the method comprises steps of crushing, material feeding and pulping, acidification leaching, material mixing, drying, acidification roasting, water leaching reactions, twice cooling crystallization, alkali neutralization, gypsum solid dreg separation, decontamination with a decontamination agent, evaporation concentration, preparation of crude lithium carbonateand rubidium and cesium salts, and the like. The comprehensive cost of lepidolite extraction can be greatly reduced, the comprehensive competitiveness of lepidolite extraction can be greatly improved, and the method is high in equipment utilization rate, environment-friendly and small in waste emission and low in production cost for preparing battery-grade lithium carbonate and rubidium and cesium salts.

Description

[0001] Technical field: the present invention relates to an extraction method for separating and extracting refined lithium carbonate, rubidium and cesium from lepidolite raw materials, especially a method for separating and extracting battery-grade lithium carbonate, rubidium and cesium salts from lepidolite. Background technique: [0002] Lithium battery new energy is one of the key energy industries supported by the state; lithium carbonate is an important basic raw material for the development of lithium battery new energy, its production and demand are increasing, and its price is getting higher and higher. [0003] Lepidolite is an important mineral resource, which is rich in rare metal materials, such as lithium, sodium, potassium, rubidium, cesium, aluminum, etc. As the world's energy becomes increasingly tense, the development and utilization of new energy is a common issue in the world, and more and more countries are paying attention to it; Lithium and its salts, lit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D15/08C01D17/00C01D5/06
CPCC01D5/06C01D15/08C01D17/00C01P2004/61C01P2006/80C01P2006/82
Inventor 李文宏张志国沈毅蔡伟平
Owner 河北铸合集团兴隆县矿业有限公司
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