Method for preparing lithium salt by separating lithium concentrate roasting material and then acidifying or alkalizing roasting material

A roasting material and lithium concentrate technology, applied in the field of new energy lithium materials, can solve problems such as high production costs, loss of economic value, and increased production costs

Pending Publication Date: 2021-10-08
李放来 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The treatment of the above solid wastes puts enterprises under enormous cost pressure! Market competitiveness is greatly reduced
In particular, the leaching slag produced by lithium salts, due to the use of traditional techniques, consumes a large amount of acid, alkali, and labor costs, turning precious resources into "solid waste" (the general application of these "solid wastes" is to give cement plants As a filling mater

Method used

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  • Method for preparing lithium salt by separating lithium concentrate roasting material and then acidifying or alkalizing roasting material
  • Method for preparing lithium salt by separating lithium concentrate roasting material and then acidifying or alkalizing roasting material
  • Method for preparing lithium salt by separating lithium concentrate roasting material and then acidifying or alkalizing roasting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A method for preparing lithium salts through acidification or alkalization after separation of concentrate roasting materials, comprising the following steps:

[0045] S1, roasting: 100 g Li 2 The spodumene ore with an O content of 5% is placed in a roasting furnace, heated to 1050° C., and sintered for 40 minutes to obtain a roasted material;

[0046] S2, crushing and separation: the roasted material obtained in step S1 is crushed and separated by the airflow crushing and separation system; the fine powder under the 150-mesh sieve is the β-type lithium concentrate powder for lithium salt production; the coarse powder on the 150-mesh sieve The material is lithium-containing feldspar powder. The jet pulverization and separation system includes a jet pulverizer and a jet classifier; the gas pressure of the jet pulverization and separation system is 7kg / cm 2 , the supply frequency is 40 Hz.

[0047] After separation, obtain 65 grams of lithium-containing feldspar powder...

Embodiment 2

[0054] A method for preparing lithium salts through acidification or alkalization after separation of concentrate roasting materials, comprising the following steps:

[0055] S1, roasting: 100 g Li 2 The spodumene ore with an O content of 5% is placed in a roasting furnace, heated to 1000° C., and sintered for 1 hour to obtain a roasted material;

[0056] S2, Grinding and Separating: Grinding and separating the calcined material obtained in step S1 through the grinding and separation system; the fine powder under the 150-mesh sieve is the β-lithium fine stone powder for lithium salt production; the coarse powder on the 150-mesh sieve That is lithium-containing feldspar powder;

[0057] After separation, obtain 62 grams of lithium-containing feldspar powder and 33 grams of lithium salt production and use β-type lithium fine stone powder (the Li of β-type lithium fine stone powder 2 The O content is 14.62%; Li 2 The O content is ≤0.27%, which is directly used for ceramic prod...

Embodiment 3

[0064] A method for preparing lithium salts through acidification or alkalization after separation of concentrate roasting materials, comprising the following steps:

[0065] S1, roasting: 100 g Li 2 The spodumene ore with an O content of 5% is placed in a roasting furnace, heated to 1000° C., and sintered for 1 hour to obtain a roasted material;

[0066] S2, high-speed stirring and separation: the roasted material obtained in step S1 is stirred and separated at a high speed through the stirring and separating system; the fine powder under the 150 mesh sieve is the β-type lithium concentrate powder for lithium salt production; the coarse powder on the 150 mesh sieve is The powder is lithium-containing feldspar powder;

[0067] After separation, obtain 64 grams of lithium-containing feldspar powder and 31 grams of lithium salt production with β-type lithium fine stone powder (the Li of β-type lithium fine stone powder 2 The O content is 15.37%; Li 2 The O content is 0.27, wh...

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Abstract

The invention relates to the technical field of new energy lithium materials, in particular to a method for preparing lithium salt by separating a lithium concentrate roasting material and then acidifying or alkalizing the roasting material. The lithium salt is prepared by roasting, dispersing and separating spodumene ore and then acidifying or alkalizing the spodumene ore; the dispersion is to disperse the roasting material into fine powder of 150 meshes or below and coarse powder of 150 meshes or above through mechanical grinding, high-speed stirring or airflow crushing, wherein the fine powder is beta-type lithium concentrate powder for lithium salt production; the coarse powder is lithium-containing feldspar powder; and the separation is to separate the fine powder from the coarse powder, only the fine powder of 150 meshes or below is subjected to acidification or alkalization reaction to prepare the lithium salt, and the coarse powder of 150 meshes or above is used as a byproduct for other purposes. According to the method, 65% of lithium-containing feldspar powder in the roasting material is separated out and does not participate in acidification or alkalization reaction any more, so that a large amount of cost is saved, the grade of the separated beta-type lithium concentrate powder is improved, the fineness is 150 meshes or above, and the lithium metal recovery rate reaches 85% or above.

Description

technical field [0001] The invention relates to the technical field of new energy lithium materials, in particular to a method for preparing lithium salts by separating lithium concentrate roasting material and then acidifying or alkalizing. Background technique [0002] Lithium is a rare and precious metal with very little reserves in nature. Lithium oxide content in domestic spodumene raw ore is 0.8-1.4%, mainly produced in lithium-rich granite pegmatite. Among them, the paragenetic minerals include quartz, albite, microcline, etc., as long as the chemical composition is: Li 2 O.AL 2 o 3 , SiO 2 and Na + , Mg 2+ , Ca 2+ 、K + , Fe 2+ , Mn 2+ , Zn 2+ Trace ions such as ions cannot be used directly under normal conditions, and the Li in the raw ore must be 2 O undergoes crystal transformation, that is, the monoclinic α-type is transformed into the tetragonal β-type, so that effective chemical reactions can be carried out. This high-temperature calcined mineral is...

Claims

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Application Information

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IPC IPC(8): C22B26/12C22B1/06C22B3/04
CPCC22B26/12C22B1/06C22B3/04Y02P10/20
Inventor 李放来范钦芳刘建林
Owner 李放来
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