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A method for extracting aluminum sulfate, aluminum potassium sulfate, rubidium sulfate and cesium sulfate using lepidolite sulfuric acid leaching solution

A technology of aluminum potassium sulfate and lepidolite, which is applied in the fields of aluminum sulfate, chemical instruments and methods, rubidium/cesium/francium compounds, etc., and can solve the undiscovered problems of extracting aluminum sulfate, cesium sulfate, etc.

Active Publication Date: 2018-08-31
江西南氏锂电新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The method for preparing lithium salts such as lithium carbonate and lithium sulfate from lepidolite has been disclosed by the prior art, but so far has not found a method for simultaneously extracting aluminum sulfate, aluminum potassium sulfate, rubidium sulfate and cesium sulfate from lepidolite

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  • A method for extracting aluminum sulfate, aluminum potassium sulfate, rubidium sulfate and cesium sulfate using lepidolite sulfuric acid leaching solution

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Experimental program
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Effect test

Embodiment 1

[0035] Such as figure 1 As shown, the method for extracting aluminum sulfate, aluminum potassium sulfate, rubidium sulfate and cesium sulfate using lepidolite sulfuric acid leaching solution provided in this embodiment comprises the following steps:

[0036] (1) Ball milling activation of lepidolite

[0037] The lepidolite is ball-milled to 200 mesh, and the iron is removed by an iron remover to obtain lepidolite powder for subsequent use;

[0038] (2) Sulfuric acid solid-phase thermal reaction

[0039] Mix the lepidolite powder obtained in step (1) with concentrated sulfuric acid solution with a mass concentration of 95% to obtain a mixture, then make the mixture into balls to obtain pellets, then heat the pellets to 300°C, and keep the Insulation reaction for 6 hours, the gas generated during the heating process is passed into lime water;

[0040] Among them, the mass ratio of lepidolite powder to concentrated sulfuric acid solution with a mass concentration of 95% is 1.2...

Embodiment 2

[0051] The method for extracting aluminum sulfate, potassium aluminum sulfate, rubidium sulfate and cesium sulfate by utilizing lepidolite sulfuric acid leaching solution provided in this embodiment comprises the following steps:

[0052] (1) Ball milling activation of lepidolite

[0053] The lepidolite is ball-milled to 100 mesh, and iron is removed by an iron remover to obtain lepidolite powder for subsequent use;

[0054] (2) Sulfuric acid solid-phase thermal reaction

[0055] Mix the lepidolite powder obtained in step (1) with concentrated sulfuric acid solution with a mass concentration of 97% to obtain a mixture, then make the mixture into balls to obtain pellets, then heat the pellets to 350°C, and keep Insulation reaction for 6 hours, the gas generated during the heating process is passed into lime water;

[0056] Among them, the mass ratio of lepidolite powder to concentrated sulfuric acid solution with a mass concentration of 97% is 1.1:1;

[0057] (3) Dilute sulf...

Embodiment 3

[0067] The method for extracting aluminum sulfate, potassium aluminum sulfate, rubidium sulfate and cesium sulfate by utilizing lepidolite sulfuric acid leaching solution provided in this embodiment comprises the following steps:

[0068] (1) Ball milling activation of lepidolite

[0069] The lepidolite is ball-milled to 400 mesh, and the iron is removed by an iron remover to obtain lepidolite powder for subsequent use;

[0070] (2) Sulfuric acid solid-phase thermal reaction

[0071] Mix the lepidolite powder obtained in step (1) with concentrated sulfuric acid solution with a mass concentration of 92% to obtain a mixture, then make the mixture into balls to obtain pellets, then heat the pellets to 400°C, and keep the Heat preservation reaction for 5 hours, and the gas generated during the heating process is passed into lime water;

[0072] Among them, the mass ratio of lepidolite powder to concentrated sulfuric acid solution with a mass concentration of 92% is 1.05:1;

[0...

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Abstract

The invention provides a method for extracting aluminum sulfate, aluminum potassium sulfate, rubidium sulfate and cesium sulfate by aid of leaching agents of lithium mica sulfuric acid. The method includes the steps of mica ball mill activation, solid phase thermal reaction of sulfuric acid, thermal extraction of dilute sulphuric acid, continuous crystallization and preparation of rubidium sulfate and cesium sulfate to obtain aluminum sulfate, aluminum potassium sulfate and cesium sulfate in sequence. The aluminum sulfate, aluminum potassium sulfate and cesium sulfate can be obtained from the preparation method, and the aluminum sulfate and the aluminum potassium sulfate which are extracted can be sold directly in industrial-grade products after disacidifying, washing and drying; in addition, the preparation method is simple in steps, and shortcomings of more waste, difficulty in use of by-product and the like can be overcome.

Description

technical field [0001] The invention relates to the technical field of extracting rubidium, cesium and aluminum salts from lepidolite, in particular to a method for extracting aluminum sulfate, aluminum potassium sulfate, rubidium sulfate and cesium sulfate by using lepidolite sulfuric acid leaching solution. Background technique [0002] Lepidolite is an important mineral resource, which is rich in rare metal materials such as lithium, sodium, potassium, rubidium, cesium and aluminum. Lepidolite is a by-product obtained by flotation of tantalum and niobium mining tailings. The chemical properties of lepidolite Formed as K{Li 2-x al 1+x [Al 2x Si 4-2x o 10 ](F,OH) 2}(x=0~0.5); the chemical composition of lepidolite varies greatly, usually containing SiO 2 47~60%, Al 2 o 3 22~29%, FeO8~12%, Li 2 O3.5~6%, F4~9%. The lithium-rich end is Al-Li or Fe-Li isomorph, the Al-Li series is incomplete isomorph, while the Fe-Li series is completely isomorph; instead of K there i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/74C01F7/76C01D17/00
CPCC01D17/00C01F7/74C01F7/762
Inventor 南进喜李汉文吴进方刘万云汤洪波
Owner 江西南氏锂电新材料有限公司
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