Method for extracting cesium and rubidium from lepidolite

A technology of lepidolite and lepidolite powder, applied in the direction of improving process efficiency and so on

Active Publication Date: 2020-11-27
ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a method for extracting cesium a

Method used

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  • Method for extracting cesium and rubidium from lepidolite

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Comparison scheme
Effect test

Embodiment 1

[0077] The method for extracting cesium and rubidium from lepidolite is as follows:

[0078] 5000g of lepidolite ore was ground into lepidolite powder, wherein -200 mesh lepidolite powder accounted for 80wt% of all lepidolite powder.

[0079] Mix the lepidolite powder with 90% concentrated sulfuric acid, the mass ratio of the concentrated sulfuric acid to the lepidolite powder is 0.85, and then roast at 270° C. to obtain the lepidolite clinker.

[0080] The lepidolite clinker was stirred and leached with 20L of water at 80°C, followed by solid-liquid separation and the leaching solution was retained to obtain a rubidium and cesium enrichment solution. In the enrichment solution of rubidium and cesium, K 2 O, Rb 2 O and Cs 2 The leaching rate of O reaches 96%, 95% and 95% successively.

[0081] Lower the temperature of the enriched solution obtained from rubidium and cesium to 30°C for cold crystallization, then separate the solid from the liquid and retain the solid to obt...

Embodiment 2

[0089] The method for extracting cesium and rubidium from lepidolite is as follows:

[0090] 1000g of lepidolite ore was ground into lepidolite powder, wherein -200 mesh lepidolite powder accounted for 70wt% of all lepidolite powder.

[0091] Mix lepidolite powder with 70% concentrated sulfuric acid, the mass ratio of concentrated sulfuric acid to lepidolite powder is 1.7, then roast at 120°C to obtain lepidolite clinker.

[0092] The lepidolite clinker was stirred and leached with 5L of water at 95°C, followed by solid-liquid separation and the leaching solution was retained to obtain a rubidium and cesium enrichment solution. In the enrichment solution of rubidium and cesium, K 2 O, Rb 2 O and Cs 2 The leaching rate of O reaches 96%, 95% and 95% successively.

[0093] Lower the temperature of the enriched solution obtained from rubidium and cesium to 50°C for cold crystallization, then separate the solid from the liquid and retain the solid to obtain the mixed alum and c...

Embodiment 3

[0101] The method for extracting cesium and rubidium from lepidolite is as follows:

[0102] 50000g of lepidolite ore was ground into lepidolite powder, wherein -200 mesh lepidolite powder accounted for 60wt% of all lepidolite powder.

[0103] Mix lepidolite powder with 85% concentrated sulfuric acid, the mass ratio of concentrated sulfuric acid to lepidolite powder is 1.36, and then roast at 200°C to obtain lepidolite clinker.

[0104] The lepidolite clinker was stirred and leached with 200L of water at 85°C, followed by solid-liquid separation and the leaching solution was retained to obtain a rubidium and cesium enrichment solution. In the enrichment solution of rubidium and cesium, K 2 O, Rb 2 O and Cs 2 The leaching rate of O reaches 96%, 95% and 95% successively.

[0105] Lower the temperature of the enriched solution obtained from rubidium and cesium to 35°C for cold crystallization, then separate the solid from the liquid and retain the solid to obtain the mixed al...

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Abstract

The invention relates to a method for extracting cesium and rubidium from lepidolite. According to the method for extracting cesium and rubidium from lepidolite, separation, enrichment, purification and recovery of rubidium and cesium are effectively achieved, and the resource utilization rate is high. As verified by tests, through treatment of lepidolite ore with the Rb2O content being about 1.0%and the Cs2O content being about 0.2% by the method, sulfate solutions with the Rb content being 12 g/L and the Cs content being 2 g/L respectively can be obtained through extraction, then cesium sulfate and rubidium sulfate with the purity being 98% or above are obtained through recovery, and the total recovery rate of cesium and rubidium is 80% or above.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of mineral resources, in particular to a method for extracting cesium and rubidium from lepidolite. Background technique [0002] The chemical properties of rubidium and cesium are lively, they are easy to spontaneously ignite in the air, and they burn violently or even explode when they meet water. They have good electrical and thermal conductivity and excellent photoelectric effect characteristics. Rubidium and cesium are the best raw materials for manufacturing photocells and photocells, and are also indispensable materials for infrared devices. The use of infrared radiation sources is used in night vision devices, such as infrared telescopes required for military reconnaissance and night navigation of warships. Rubidium and cesium isotopes are used to make atomic clocks, and the extremely high-precision rubidium and cesium atomic clocks play an important role in aircraft navigation sys...

Claims

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Application Information

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IPC IPC(8): C22B26/10C22B3/08C22B3/26
CPCC22B26/10C22B3/08C22B3/262Y02P10/20
Inventor 张秀峰谭秀民伊跃军张永兴张利珍马亚梦王威
Owner ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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