Method for extracting lithium, rubidium and cesium in zinnwaldite

A technology for lithotripsy and an extraction method, applied in the field of metallurgy, can solve the problems of addition and low efficiency, and achieve the effects of simple purification process, low energy consumption, and reduced production cost

Inactive Publication Date: 2016-12-14
道县亿林矿业有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the existing method for extracting lithium, rubidium and cesium from iron lepidolite ore, which either adds chlorine impurities or has low efficiency in extracting lithium, rubidium and cesium, and proposes an iron lepidolite ore Extraction method of lithium, rubidium and cesium

Method used

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  • Method for extracting lithium, rubidium and cesium in zinnwaldite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The chemical composition and content of the iron lepidolite that the present embodiment adopts are: 2.40wt% Li 2 O, 0.34wt% Na 2 O, 8.34 wt% K 2 O, 0.86 wt% Rb 2 O, 0.073wt%Cs 2 O, 43.41wt% SiO 2 , 26.14wt% Al 2 o 3 , 18.86wt% FeO, 4.97wt% F.

[0037] Mix iron lepidolite, calcium sulfate, calcium hydroxide, sodium sulfate and calcium carbonate at a mass ratio of 1.00:0.4:0.17:0.3:0.2 to make raw ore pellets with a diameter of about 30mm; then the raw ore The pellets were roasted at 900°C for 60 minutes to obtain cooked ore pellets; the flue gas during the roasting process was cooled, collected and purified; the cooked ore pellets were quenched with water, wet ball milled, and then mixed with 90°C water at 3: Mix the liquid-solid mass ratio of 1, and stir for 40 minutes, and then filter to obtain the leaching solution containing alkali metal compounds such as lithium, potassium, rubidium and cesium; finally, add calcium oxide to the leaching solution to purify and...

Embodiment 2

[0045] The chemical composition and content of the iron lepidolite that the present embodiment adopts are: 2.13wt% Li 2 O, 0.34wt% Na 2 O, 9.34 wt% K 2 O, 0.63 wt% Rb 2 O, 0.043wt%Cs 2 O, 48.41wt% SiO 2 , 27.14wt%Al 2 o 3 , 21.86wt% FeO, 5.77wt% F.

[0046] Mix iron lepidolite, calcium sulfate, calcium hydroxide, potassium sulfate and calcium carbonate at a mass ratio of 1.00:0.4:0.2:0.2:0.3 to make raw ore pellets with a diameter of about 25mm; then the raw ore The pellets were roasted at 900°C for 50 minutes to obtain cooked ore pellets; the flue gas during the roasting process was cooled, collected and purified; the cooked ore pellets were quenched with water, wet ball milled, and then mixed with 40°C water at 4: Mix the liquid-solid mass ratio of 1, and stir for 30 minutes, and then filter to obtain the leaching solution containing alkali metal compounds such as lithium, potassium, rubidium and cesium; finally, add calcium oxide to the leaching solution to purify an...

Embodiment 3

[0053] The chemical composition and content of the iron lepidolite that the present embodiment adopts are: 2.69wt% Li 2 O, 0.34wt% Na 2 O, 8.12 wt% K 2 O, 0.93 wt% Rb 2 O, 0.086wt%Cs 2 O, 41.41wt% SiO 2 , 30.14wt%Al 2 o 3 , 20.67wt% FeO, 5.09wt% F.

[0054] Mix the iron lepidolite ore, the purification slag in Example 1, calcium sulfate, potassium sulfate, calcium hydroxide and calcium carbonate at a mass ratio of 1.0:0.1:0.4:0.2:0.25:0.3, and make a diameter of about 20mm Raw ore pellets; then roast the raw ore pellets at 950°C for 60 minutes to obtain cooked ore pellets; and the flue gas during the roasting process will be cooled, collected and purified; the cooked ore pellets are quenched with water, and wet Ball milling, and then mixed with 50°C water at a liquid-solid mass ratio of 2:1, stirred for 40 minutes, and then filtered to obtain a leaching solution containing alkali metal compounds such as lithium, potassium, rubidium and cesium; finally, calcium oxide was...

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Abstract

The invention discloses a method for extracting lithium, rubidium and cesium in zinnwaldite. The method includes the following steps that S1, the zinnwaldite and a roasting addition agent are evenly mixed and pelletized, and thus raw ore pellets are obtained; the roasting addition agent is a compound addition agent which is composed of sulfate and/or calcium carbonate and/or calcium hydroxide and/or calcium oxide; S2, the raw ore pellets are roasted, so that clinker ore pellets are obtained; S3, the clinker ore pellets are ground, the ground clinker ore pellets are immersed by water, filtering is performed, and thus leach liquor is obtained; and S4, calcium oxide and/or calcium hydroxide are/is added into the leach liquor, performing is performed, and thus a purified solution containing water-soluble lithium salt, water-soluble rubidium salt and water-soluble cesium salt is obtained. According to the lithium extracting method, the compound roasting addition agent is creatively used, the extraction efficiency of alkali metal like the lithium, rubidium and cesium is improved, and cost is reduced.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for extracting lithium, rubidium and cesium in iron lepidolite ore. Background technique [0002] "Lithium is an energy element in the 21st century"; at the same time, as the associated products of lithium ore, rubidium and cesium have small output and high value; they are playing or will soon play an important role in strategic emerging industries or in high-end manufacturing role. Therefore, all countries in the world generally attach importance to the development of the lithium industry, and the development of lithium ore resources is of great significance. [0003] In nature, lithium-containing ores are mainly spodumene, iron lepidolite, lepidolite, and lepidolite; among them, lepidolite and spodumene are important solid minerals for producing lithium carbonate at home and abroad. At present, the main methods for extracting lithium from solid minerals such as lepidolite / s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B26/10
CPCC22B26/10
Inventor 谢勇明炉发肖松文赵卫夺谢美求刘国伟
Owner 道县亿林矿业有限公司
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