Method for extracting metallic elements by treating lepidolite

A technology of metal elements and lepidolite, which is applied in the processing of mineral raw materials and in the field of extracting metal elements from lepidolite, can solve the problems of insufficient defluorination, insufficient mechanical activation, high pressure cooking temperature, etc., achieve high recovery rate and solve separation difficulties , Enhance the effect of reactivity

Active Publication Date: 2018-05-08
湖南吉新锂业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The pressure cooking method is to first roast lepidolite for defluorination, and then leaching with sodium carbonate and lime. However, during defluorination and roasting, the defluorination is not in place, and the mechanical activation is not enough. The pressure cooking temperature is high and high-pressure equipment is required. This greatly limits the application of the method

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  • Method for extracting metallic elements by treating lepidolite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Ball mill lepidolite concentrate to below 100 mesh, take mechanically activated mica ore, ammonium sulfate, and methyl cellulose in a mass ratio of 1:1.2:0.2, and react at 220°C for 90 minutes, and then at a speed of 20°C / min Heat up to 400°C for 20 minutes, then cool to obtain clinker. During the roasting process, waste gas is recovered to prepare ammonium salts and returned to the reconstitution batching process. The waste heat is used to dry lepidolite. The obtained clinker was reacted at 10°C and a liquid-solid ratio of 2:1 for 30 minutes, filtered to preferentially separate the lithium salt solution, and the filter residue was reacted at 96°C and a liquid-solid ratio of 2:1 for 60 minutes, and filtered to obtain sodium, potassium, rubidium, and cesium , aluminum solution, and the secondary leaching filter residue is washed countercurrently with hot water at 90°C.

[0040] The extraction rate of lithium, sodium, potassium, rubidium, and cesium after mineral phase re...

Embodiment 2

[0042] Ball mill the lepidolite concentrate to below 200 mesh, take the mechanically activated mica ore, ammonium sulfate, and methyl cellulose in a mass ratio of 1:1.2:0.2, and react at 250°C for 75min, then at 20°C / min Heat up to 480°C for 30 minutes, then cool to obtain clinker. During the roasting process, waste gas is recovered to prepare ammonium salts and returned to the reconstitution batching process. The waste heat is used to dry lepidolite. The obtained clinker was reacted at 15°C and a liquid-solid ratio of 1.8:1 for 30 minutes, filtered to preferentially separate the lithium salt solution, and the filter residue was reacted at 90°C and a liquid-solid ratio of 2:1 for 60 minutes, and filtered to obtain sodium, potassium, rubidium, and cesium , aluminum solution, and the secondary leaching filter residue is washed countercurrently with hot water at 90°C.

[0043] The extraction rate of lithium, sodium, potassium, rubidium and cesium after mineral phase reconstructio...

Embodiment 3

[0045] Ball mill the lepidolite concentrate to below 200 mesh, take the mechanically activated mica ore, ammonium sulfate, and methyl cellulose in a mass ratio of 1:1.2:0.2, and react at 300°C for 75 minutes, then at a speed of 20°C / min Heat up to 600°C for 30 minutes, then cool to obtain clinker. During the roasting process, waste gas is recovered to prepare ammonium salts and returned to the reconstitution batching process. The waste heat is used to dry lepidolite. The obtained clinker was reacted at 10°C and a liquid-solid ratio of 2:1 for 30 minutes, filtered to preferentially separate the lithium salt solution, and the filter residue was reacted at 80°C and a liquid-solid ratio of 2:1 for 60 minutes, and filtered to obtain sodium, potassium, rubidium, and cesium , aluminum solution, and the secondary leaching filter residue is washed countercurrently with hot water at 90°C.

[0046] The extraction rate of lithium, sodium, potassium, rubidium and cesium after mineral phase...

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Abstract

The invention discloses a method for extracting metallic elements by treating lepidolite. The method comprises the following steps of 1, conducting mechanical activation on lepidolite concentrate; 2,uniformly mixing lepidolite powder with a restructuring agent and a binding agent according to the mass ratio of 1: (1-2): (0.2-0.5), and then conducting molding; 3, firstly, conducting low-temperature restructuring on a blank body obtained in step 2, and then conducting medium-temperature decomposition, so that clinker is obtained; 4, conducting water logging treatment, wherein firstly, leachingseparation is conducted on the clinker obtained in step 3 in a leaching agent at the temperature of 0-30 DEG C, so that a lithium salt solution is obtained, and then, leaching separation is conductedin the leaching agent at the temperature of 70-100 DEG C, so that a salt solution containing sodium, potassium, rubidium, caesium and aluminum is obtained; and 5, implementing a washing process on filter residues obtained after secondary leaching in step 4, so that high-silicon residues are obtained. By means of the method, the metallic elements in the lepidolite concentrate can be converted intodiffluent salt to be separated and extracted to the greatest extent; the utilization rate and economic benefits of the lepidolite concentrate are remarkably increased; and the method is easy to operate, low in process cost and high in recycling rate of the metallic elements.

Description

technical field [0001] The invention relates to a method for processing mineral raw materials, which belongs to the technical field of mineral processing, in particular to a method for processing lepidolite to extract metal elements. Background technique [0002] At present, there are many lithium-containing minerals in my country, among which spodumene (Li 2 O·Al 2 o 3 4SiO2 2 ), Lepidolite (KLi 1.5 Al 1.5 [AlSi 3 o 10 ](OH,F) 2 ), petalite (Li 2 O·Al 2 o 3 ·8SiO2 2 ), phosphorus lithium mica (LiAl[PO 4 ](OH,F)) and iron lepidolite (K(Li,Al,Fe)[AlSi 3 o 10 ](OH,F) 2 ). At the same time, salt lake brine is an important source of lithium extraction. Due to the low cost of extracting lithium from brine, many manufacturers have adopted this technology at present. However, due to the high content of impurities such as Mg in brine, the removal of impurities in the later stage is cumbersome, resulting in low product purity. High, and with the increasing demand for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B3/04C22B26/10C22B23/00
CPCC22B1/02C22B3/04C22B23/0407C22B26/10Y02P10/20
Inventor 姚胜兰
Owner 湖南吉新锂业科技有限公司
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