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Method for extracting lithium, rubidium and co-producing zeolite or potassium nepheline from lithium mica ore

A technology of lepidolite and potassium nepheline, which is applied in the field of rubidium and by-product zeolite or potassium nepheline and extraction of lithium, can solve the problems of difficult utilization of leaching slag, high equipment requirements, equipment corrosion, etc., and achieves comprehensive utilization and equipment. Simple requirements and the effect of meeting environmental protection requirements

Active Publication Date: 2019-02-12
UNIV OF SCI & TECH BEIJING
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  • Summary
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The sulfuric acid method will produce a series of neutralized slag, the lime roasting method has the problem that the leaching residue is difficult to use, the pressure cooking method uses a pressure vessel, and has high requirements for equipment, and the chlorination roasting method is easy to cause equipment corrosion

Method used

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  • Method for extracting lithium, rubidium and co-producing zeolite or potassium nepheline from lithium mica ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) 80g lepidolite ore (containing Li 2.2%, Rb 0.6%, particle size-100 mesh) is mixed with 60% sodium hydroxide solution, wherein, the weight ratio of sodium hydroxide and lepidolite ore is 4.8:1, in The temperature was 270°C for 2 hours.

[0020] (2) Dilute the pulp that has been reacted in step (1) with water, the weight of the water used for dilution is 3 times the weight of lepidolite, filter to obtain lithium-containing solution and zeolite products, the extraction rate of lithium reaches 94.2%, and the extraction rate of rubidium reaches 96.4% .

[0021] (3) The lithium-containing and rubidium-containing solution obtained in step (2) is added to sodium carbonate and undergoes a precipitation reaction to obtain lithium-precipitated liquid and lithium carbonate products.

[0022] (4) Add the lithium precipitation solution obtained in step (3) to t-BAMBP for extraction and recovery of rubidium.

Embodiment 2

[0024] (1) 80g lepidolite ore (containing Li 0.6%, Rb 0.09%, particle size-100 mesh) is mixed with 70% sodium hydroxide solution, wherein, the weight ratio of sodium hydroxide and lepidolite ore is 8:1, in The temperature was 330°C for 0.5h.

[0025] (2) Dilute the pulp that has been reacted in step (1) with water, the weight of the water used for dilution is 5 times the weight of lepidolite, filter to obtain a solution containing lithium and rubidium and a zeolite product, wherein the extraction rate of lithium reaches 99.1%, and the extraction rate of rubidium The rate reached 99.3%.

[0026] (3) adding the lithium- and rubidium-containing solution obtained in step (2) into sodium phosphate to undergo a precipitation reaction to obtain lithium-precipitated liquid and lithium phosphate products.

[0027] (4) Add the lithium precipitation solution obtained in step (3) to t-BAMBP for extraction and recovery of rubidium.

Embodiment 3

[0029] (1) 80g lepidolite ore (containing Li 1.8%, Rb 0.3%, particle size-200 mesh) is mixed with 85% sodium hydroxide solution, wherein, the weight ratio of sodium hydroxide to lepidolite ore is 2.8:1, in The temperature was 270°C for 3h.

[0030] (2) Dilute the pulp that has been reacted in step (1) with water, the weight of the water used for dilution is 5 times of the lepidolite weight, filter to obtain a solution containing lithium and rubidium and a zeolite product, wherein the extraction rate of lithium reaches 92.8%, and the extraction rate of rubidium The rate reached 94.6%.

[0031] (3) adding the lithium- and rubidium-containing solution obtained in step (2) into sodium phosphate to undergo a precipitation reaction to obtain lithium-precipitated liquid and lithium phosphate products.

[0032] (4) Add the lithium precipitation solution obtained in step (3) to t-BAMBP for extraction and recovery of rubidium.

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Abstract

The invention provides a method for extracting lithium, rubidium and co-producing zeolite or potassium nepheline from lithium mica ore, and belongs to the technical field of hydrometallurgy. Accordingto the method, the lithium mica ore and sodium hydroxide solution or potassium hydroxide solution are added into a reactor to be stirred and mixed, and the appropriate temperature is controlled to carry out ore-phase transformation under the normal-pressure condition. The lithium-mica is converted into the zeolite or the potassium nepheline through the ore-phase transformation, and the lithium and the rubidium in the lithium mica are transferred into the solution, so that a solution containing the lithium and the rubidium is obtained; and a lithium product can be obtained from the solution through chemical precipitation, and the rubidium can be recovered from the solution through extraction. According to the method, the lithium mica ore is treated by adopting a full-wet-method technology,so that the valuable metal lithium and rubidium in the type of lithium ore is realized, and the zeolite and the potassium nepheline products with high added values are obtained through the ore phasetransformation, and the comprehensive utilization of resources is finally realized. In addition, the method has the characteristics of being short in flow, few in working procedures, low in energy consumption cost and the like, and the environmental protection requirements of clean production can be met.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for extracting lithium and rubidium from lepidolite ore and producing zeolite or kassinite by-product. Background technique [0002] At present, the methods for extracting lithium from lepidolite mainly include sulfuric acid method, lime roasting method, pressure cooking method, and chlorination roasting method. Chinese patent CN201210512662.8 discloses a method for extracting lithium from lepidolite raw materials by sulfuric acid method, in which lepidolite is calcined and reacted with sulfuric acid solution under pressure, and the acid leaching temperature is 85-95°C. Chinese patent CN201210080657.4 discloses a method of processing lepidolite ore by pressure cooking. The calcine after lepidolite roasting is mechanically activated and then mixed with lime and alkali metal sulfate or alkali metal chloride and then pressure cooked. leach. Chinese patent CN201711...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/12C22B3/44C22B3/26C22B26/12C22B26/10C01B39/02C01B33/26
CPCC01B33/26C01B39/02C22B3/12C22B3/44C22B26/10C22B26/12C22B3/262Y02P10/20
Inventor 王成彦邢鹏曾磊马保中陈永强
Owner UNIV OF SCI & TECH BEIJING
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