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Method for for carrying out fluidized extraction on spodumene by utilizing sulfide

A spodumene and sulfide technology, applied in silicate, aluminum silicate and other directions, can solve the problems of high cost and high energy consumption in the extraction process of spodumene, and achieve the effects of low energy consumption, high purity and high purity

Pending Publication Date: 2021-03-09
成都大川锂电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned prior art, the present invention provides a method for fluidized extraction of spodumene by using sulfide to solve the problems of high energy consumption and high cost of the existing spodumene extraction process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method utilizing sulfide to carry out fluidized extraction of spodumene, comprising the following steps:

[0031] S1: Mix pure sulfur and primary spodumene powder with a particle size of about 30 μm in a mass ratio of 1:2, then transfer the mixture to a fluidized calciner for fluidized high-temperature roasting, and the external roasting temperature is 850°C;

[0032] S2: Mix the roasted spodumene powder and water at a material-to-liquid ratio of 1:2g / mL, and stir at a stirring speed of 60rpm / min for about 1h to dissolve the lithium in the ore, and then press filter to obtain an extract;

[0033] S3: use NaHCO 3 / H 2 CO 3 The buffer solution adjusts the pH value of the extract to about 8.0, stirs until no new precipitate is formed, and precipitates impurity metal ions such as aluminum, magnesium, calcium, iron and the like in the extract, and then filters to obtain a lithium sulfate solution;

[0034] S4: Evaporate and concentrate the lithium sulfate filtrate, the...

Embodiment 2

[0036] A method utilizing sulfide to carry out fluidized extraction of spodumene, comprising the following steps:

[0037] S1: Mix pure sulfur and primary spodumene powder with a particle size of about 10 μm in a mass ratio of 1:3, then transfer the mixture to a fluidized calciner for fluidized high-temperature calcination, and the external calcination temperature 900°C;

[0038] S2: Mix the roasted spodumene powder with a sulfuric acid solution with a concentration of 1mol / L at a material-to-liquid ratio of 1:1g / mL, and stir at a stirring speed of 60rpm / min for about 1h to dissolve lithium in the ore, and then press filtration to obtain the extract;

[0039] S3: use NaHCO 3 / H 2 CO 3 The buffer solution adjusts the pH value of the extract to about 8.0, stirs until no new precipitate is formed, and precipitates impurity metal ions such as aluminum, magnesium, calcium, iron and the like in the extract, and then filters to obtain a lithium sulfate solution;

[0040] S4: Eva...

Embodiment 3

[0042] A method utilizing sulfide to carry out fluidized extraction of spodumene, comprising the following steps:

[0043] S1: Mix pure sulfur and primary spodumene powder with a particle size of about 50 μm in a mass ratio of 1:1, then transfer the mixture to a fluidized calciner for fluidized high-temperature calcination, and the external calcination temperature is 800°C;

[0044] S2: Mix the roasted spodumene powder with a sulfuric acid solution with a concentration of 0.5mol / L at a material-to-liquid ratio of 1:3g / mL, and stir at a stirring speed of 60rpm / min for about 1h to dissolve lithium in the ore. Then press filter to obtain the extract;

[0045] S3: use NaHCO 3 / H 2 CO 3 The buffer solution adjusts the pH value of the extract to about 8.0, stirs until no new precipitate is formed, and precipitates impurity metal ions such as aluminum, magnesium, calcium, iron and the like in the extract, and then filters to obtain a lithium sulfate solution;

[0046] S4: Evaporat...

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Abstract

The invention discloses a method for carrying out fluidized extraction on spodumene by utilizing sulfide. The method comprises the following steps: uniformly mixing sulfide and spodumene powder, and carrying out fluidized high-temperature roasting on the mixture; and then extracting the calcined spodumene powder by using an extracting solution to obtain a leaching solution containing lithium sulfate. By roasting the mixture of sulfide and spodumene, lithium in spodumene can be extracted with low energy consumption, so that energy consumption is low, and environmental pollution is avoided; andthe extracted lithium salt has high purity and can be used in the fields of lithium batteries, nuclear power and the like.

Description

technical field [0001] The invention belongs to the technical field of spodumene, and in particular relates to a method for fluidized extraction of spodumene by using sulfide. Background technique [0002] Spodumene is a monoclinic crystal system, and the crystals are often columnar, granular or plate-like. The color is off-white, gray-green, purple or yellow, etc., the hardness is 6.5-7, and the density is 3.03-3.22g / cm 3 . LiAl(SiO 3 ) 2 or Li 2 O·Al 2 o 3 4SiO2 2 , The theoretical lithium content is 3.75% (lithium oxide 8.04%). α-spodumene is rapidly transformed into β-spodumene when roasted to about 1000 °C. [0003] At present, the methods for extracting lithium from lepidolite mainly include lime milk pressure cooking and so on. The lime milk pressure cooking method is to grind lepidolite to 200 meshes, directly add water and calcium hydroxide to cook in an autoclave, the pressure is generally 2.8MPa, the reaction time is 4 hours, and the decomposition rate r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/26
CPCC01B33/26
Inventor 任燕邹廷军
Owner 成都大川锂电科技有限公司
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