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Method for extracting rubidium and cesium from lepidolite ores

A technology of lepidolite and mother liquor, which is applied in the field of metallurgy, can solve the problems of high energy consumption, repeated times of cooling crystallization and heating filtration, and difficult to meet the requirements of purity, and achieve the effect of high energy consumption, long heating time and short heating time

Active Publication Date: 2017-08-11
江西南氏锂电新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method not only has many repetitions of cooling crystallization and heating filtration, but also consumes a lot of energy. If the number of repetitions of cooling crystallization and heating filtration is not enough, the purity of potassium alum, cesium alum, and rubidium alum is difficult to meet the requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: Place α-type lepidolite in a microwave device, the microwave device is microwave burning in a microwave oven, 780-900°C microwave burning for 20 minutes, preferably 780°C burning, (here the power of the microwave oven is 2KW , microwave frequency is 2±50MHz, temperature 0-900℃), convert α-type lepidolite into β-type lepidolite; then crush and grind β-type lepidolite to finer than 300 mesh, mix concentrated sulfuric acid and put it in a microwave oven Carry out sulfation roasting for 8 minutes, (here the power of the microwave oven is 2KW, the microwave frequency is 2±50MHz, and the temperature is 0-200°C), the amount of concentrated sulfuric acid added is 250kg per ton of lepidolite powder; after testing, the α-type lepidolite is converted The conversion rate of β-type lepidolite is 100%.

[0025] Step 2. Soak the sulfated and roasted β-type lepidolite ore powder in water, and ultrasonically stir during the soaking process, then adjust the pH value to 5-7, let t...

Embodiment 2

[0033] Step 1: Place the α-type lepidolite in a microwave oven for microwave burning, 800°C for 30 minutes (the power of the microwave oven is 2KW, the microwave frequency is 2±50MHz, and the temperature is 0-900°C), and the α-type lepidolite Convert to β-type lepidolite; then crush and grind β-type lepidolite, sieve with 300 meshes, mix with concentrated sulfuric acid and put it into a microwave oven for sulfuration roasting for 5min, (here the power of the microwave oven is 2KW, and the microwave frequency is 2±50MHz , temperature 0-200℃), the amount of concentrated sulfuric acid added is 150kg per ton of lepidolite powder; after testing, the conversion rate of α-type lepidolite into β-type lepidolite reaches 100%.

[0034] Step 2. Soak the sulfated and roasted β-type lepidolite ore powder in water, and ultrasonically stir during the soaking process, then adjust the pH value to 6, leave it to stand until the suspended solid particles settle, and filter the supernatant to obta...

Embodiment 3

[0041] Step 1: Place the α-type lepidolite in a microwave oven for microwave burning, 750°C for 25 minutes to convert the α-type lepidolite into β-type lepidolite; then crush and grind the β-type lepidolite to finer than 300 mesh, After mixing concentrated sulfuric acid, put it into a microwave oven for sulfation roasting for 15 minutes (the power of the microwave oven is 2KW, the microwave frequency is 2±50MHz, and the temperature is 0-200°C). The amount of concentrated sulfuric acid added is 200kg per ton of lepidolite ore powder ; After testing, the transformation rate of α-type lepidolite into β-type lepidolite is 100%.

[0042] Step 2. Soak the sulfated and roasted β-type lepidolite ore powder in water, and ultrasonically stir during the soaking process, then adjust the pH value to 5, leave it to stand until the suspended solid particles settle, and filter the supernatant to obtain lithium-containing, Alkali metal solution mother liquor of potassium, rubidium and cesium; ...

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PUM

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Abstract

The invention belongs to the technical field of metallurgy and discloses a method for extracting rubidium and cesium from lepidolite ores. The method comprises the steps: converting alpha-type lepidolite into beta-type lepidolite by using a microwave oven, smashing the beta-type lepidolite, mixing concentrated sulfuric acid to carry out microwave sulfatizing roasting, and soaking the beta-type lepidolite to obtain a mother solution of an alkali metal solution containing lithium, potassium, rubidium and cesium; then, circularly adsorbing cesium ions by using a cesium cation exchange resin column, and carrying out elution to obtain a cesium salt; and next, circularly adsorbing rubidium ions by using a rubidium cation exchange resin column, and carrying out elution to obtain a rubidium salt. If the lepidolite ores are treated by using the method disclosed by the invention, the energy consumption is low, no sulfur trioxide is produced, in addition, the extraction ratios of rubidium and cesium are high, and the subsequent lithium extraction process can be favorably simplified.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and relates to a method for extracting rubidium and cesium from lepidolite ore. Background technique [0002] 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. Lithium battery new energy, as one of the important industries for the development of new energy, has been paid more and more attention by various countries; lithium and its salts lithium carbonate, lithium sulfate, etc. Salt is the basic raw material product of the lithium battery new energy industry, and lepidolite contains lithium metal, the basic material of the lithium battery new energy industry, so the development and application of lepidolite has become a hot topic today. In the process of development ...

Claims

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Application Information

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IPC IPC(8): C22B1/06C22B26/10C22B3/42C22B26/12
CPCC22B1/06C22B3/42C22B26/10C22B26/12Y02P10/20
Inventor 南进喜李汉文吴进方
Owner 江西南氏锂电新材料有限公司
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